GAS DISCHARGE TUBES (GDTS) Littelfuse's GDTs (Gas Discharge Tubes) are placed in front of, and in parallel with, sensitive telecom equipment such as power lines, communication lines, signal lines and data transmission lines to help protect them from damage caused by transient surge voltages that may result from lightning strikes and equipment switching operations. These devices do not influence the signal in normal operation. However, in the event of an overvoltage surge, such as a lightning strike, the GDT switches to a low impedance state and diverts the energy away from the sensitive equipment. Our GDTs offer a high level of surge protection, a broad voltage range, low capacitance, and many form factors including new surface mount devices, which makes them suitable for applications such as Main Distribution Frame (MDF) modules, high data-rate telecom applications (e.g. ADSL, VDSL), and surge protection on power lines. Their low capacitance also results in less signal distortion. When used in a coordinated circuit protection solution with PolySwitch devices, they can help equipment manufacturers meet stringent safety regulatory standards. BENEFITS APPLICATIONS * Helps provide overvoltage fault protection against damage caused by high energy surges * Suitable for use in sensitive equipment due to impulse sparkover response * Suitable for high-frequency applications * Highly reliable performance * Telecommunications - MDF modules, xDSL equipment, RF systems, antenna, base stations * Industrial and Consumer Electronics - Power supplies, surge protectors, alarm systems, irrigation systems * New surface-mount devices for automated manufacturing FEATURES * RoHS compliant * Devices tested per ITU K.12 recommendations * Halogen free (refers to: Br900ppm, Cl900ppm, Br+Cl1500ppm) * Various lead configurations and surface-mount options * Wide range of voltages (75V-4000V) * Optional fail-short mechanism * Wide range of form factors (3mm, 5mm, 6mm, 7mm, 8mm diameter devices) * Non radioactive materials * Devices certified to UL497B and UL1449 * Low capacitance and insertion loss * Crowbar device with low arc voltage * High accuracy spark-over voltages for high precision designs RoHS Compliant, ELV Compliant Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 73 Gas Discharge Tubes (GDTs) Figures G1-G2 -- Typical Circuits for Gas Discharge Tubes Figure G1 Figure G2 Two Two Electrode Electrode Devices Devices forfor Ungrounded Ungrounded Circuits Circuits PolySwitch PolySwitch Device Device (A) (A) Telecom Telecom LineLine Three Three Electrode Electrode Devices Devices forfor Grounded Grounded Circuits Circuits Protected Protected Equipment Equipment GDTGDT (B) (B) PolySwitch PolySwitch Device Device (A) (A) (A')(A') Telecom Telecom LineLine (B')(B') Thyristor Thyristor (A')(A') Protected Protected Equipment Equipment GDTGDT (B) (B) (B')(B') Thyristors Thyristors PolySwitch PolySwitch Device Device Table G1 -- Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Two-Electrode Gas Discharge Tubes DC Sparkover Voltage Part Number Impulse Sparkover Voltage @ 100V/s 20% Tolerance @ 1kV/s 75* 600 90 600 140 600 GTCS23-XXXM-R01-2 GTCC23-XXXM-R01-2 150 600 200 700 230 700 300 900 350 1000 400 1000 Impulse Discharge Current Impulse Withstanding Voltage Capacitance Insulation Resistance UL Rating 8x20s 10 Hits (5 Hits Each Polarity) 8x20s 300 Hits (150 Hits Each Polarity) 10/700s 10 Hits (5 Times Each Polarity) @1MHz @100VDC 1kA 100A 4kV <0.5pF 1,000 (M) All Devices 1kA 100A 6kV <0.5pF 1,000 (M) All Devices UL497B #E179610 * DCSO 60~105 Devices <=150V measured @ 50VDC Effective output impedance: 40ohms DC Sparkover Voltage Part Number GTCX25-XXXM-R02 GTCX26-XXXM-R05 GTCX28-XXXM-R05 GTCX28-XXXM-R10 GTCX28-XXXM-R20** Impulse Sparkover Voltage @ 100V/s 20% Tolerance @ 100V/s @ 1kV/s DC Holdover Voltage AC Discharge Current (1s duration; Insulation 10 hits) Capacitance Resistance On-State Voltage Impulse Discharge Current Impulse Life Per ITU K.12 Nominal (@1A) (V) 8x20s 10 Hits 10x1000s 300 Hits @ 50 Hz @ 1MHz 2.5kA 100A 2.5Arms <1pF 10,000 (M) All Devices 5kA 100A 5Arms <1pF 10,000 (M) All Devices 5kA 100A 5Arms <1pF 10,000 (M) All Devices 10kA 100A 10Arms <1pF 10,000 (M) All Devices 20kA 100A 20Arms <1.5pF 10,000 (M) All Devices 75 450 550 <52 20 90 450 550 <52 20 140 500 600 <80 20 150 500 600 <80 20 200 600 700 <135 20 230 600 700 <135 20 250 600 700 <135 20 260 700 800 <135 20 300 800 900 <150 20 350 900 1000 <150 20 400 900 1000 <150 20 420 900 1000 <150 20 470 1050 1150 <150 20 500 1100 1200 <150 20 550 1300 1400 <150 20 600 1300 1400 <150 20 @ 100VDC UL Rating UL497B #E179610 ** GTCX28-XXXM-R20 parts only up to 350V <1.2pF for 75V and 90V devices. 74 Specifications subject to change without notice. (c)2016 Littelfuse, Inc. RoHS Compliant, ELV Compliant Gas Discharge Tubes (GDTs) Table G2 -- Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Two Electrode High-Voltage Gas Discharge Tubes DC Sparkover Voltage Impulse Sparkover Voltage Impulse Life @100V/s 20% Tolerance @ 100V/s 10/1000s 100A GTCA28-801M-R05 800 1400 GTCA28-102M-R03 1000 1700 GTCA28-122M-R03 1200 GTCA28-152L-R03 Impulse Discharge Current 8/20s AC Discharge Current, 50Hz Capacitance UL Rating @ 1MHz UL1449 #E332226 Multiple Hits (1s Duration: 10 Hits) Single Hit, 9 Cycles 300 times 5A N/A 5kA N/A <1pF 3 N/A 1A 5A 3kA 10kA <1pF 3 1900 N/A 1A 5A 3kA 10kA <1pF 3 1500 ( 15%) 2200 N/A 1A 5A 3kA 10kA <1pF 3 GTCA28-212M-R03 2100 2700 N/A 1A 5A 3kA 10kA <1pF 3 GTCA28-242M-R03 2400 3300 N/A 1A 5A 3kA 10kA <1pF 3 GTCA28-252M-R03 2500 3500 N/A 1A 5A 3kA 10kA <1pF 3 GTCA28-272L-R03 2700 ( 15%)* 3700 300 Times N/A N/A 3kA 10kA <1pF 3 GTCA28-302M-R03 3000 4000 N/A 1A 5A 3kA 10kA <1pF 3 3100 ( 15%)* 3700 300 Times N/A N/A 3kA 10kA <1pF 3 Part Number GTCA28-312L-R03 10 Hits (5 Hits Each Polarity) 1 Hit GTCA28-362M-R03 3600 4600 N/A 1A 5A 3kA 10kA <1pF 3 GTCA28-402M-R03 4000 5000 N/A 1A 5A 3kA 10kA <1pF 3 Table G3 -- Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Three-Electrode Gas Discharge Tubes DC Sparkover Voltage (A-E) (B-E) Part Number GTCX35-XXXM-R05 GTCX36-XXXM-R05 GTCX36-XXXM-R10 GTCX37-XXXM-R10 GTCX38-XXXM-R10 Impulse Sparkover Voltage (A-E) (B-E) @ 100V/s 20% Tolerance @ 100V/s @ 1kV/s AC Discharge Current (1s duration; 10 hits) Insulation (A+B-E) Capacitance Resistance UL Rating @ 100VDC* UL497B #E179610 DC Holdover Voltage On-State Voltage Impulse Discharge Current (A+B-E) Per ITU K.12 Nominal (@1A) (V) 8x20s 10 Hits 10x1000s 300 Hits @ 50 Hz @ 1MHz 5kA 100A 5Arms <1pF 10,000 (M) All Devices 5kA 200A 5Arms <1pF 10,000 (M) All Devices 10kA 200A 10Arms <1pF 10,000 (M) All Devices 10kA 200A 10Arms <1pF 10,000 (M) All Devices 10kA 200A 10Arms <1pF 10,000 (M) All Devices 75 450 550 <52 20 90 450 550 <52 20 140 500 600 <80 20 150 500 600 <80 20 200 600 700 <135 20 230 600 700 <135 20 250 600 700 <135 20 260 700 800 <135 20 300 800 900 <150 20 350 900 1000 <150 20 400 900 1000 <150 20 420 900 1000 <150 20 470 1050 1150 <150 20 500 1100 1200 <150 20 550 1300 1400 <150 20 600 1300 1400 <150 20 Impulse Life (A+B-E) * Insulation resistance measured at 50V for devices less than 150V. Insulation resistance measured at 250V for devices more than 500V. RoHS Compliant, ELV Compliant Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 75 Gas Discharge Tubes (GDTs) Figures G3-G11 -- Dimensions for Gas Discharge Tubes Figure G3 -- Two Electrode 3mm Product Dimensions Pad Layout - Surface-mount Devices (GTCS23-XXXM-R01) 3.0 3.00.2 0.2 o3o .30.0 Surface-mount (GTCS23-XXXM-R01) Y Z1 3.0 0.2 0.2 3.0 mm 3.0 2.0 2.0 2.0 in* 0.118 0.079 0.079 0.079 X Nom 3.2 0.2 0.2 3.2 Y 5.0 0.2 (0.197 0.008) Z1 Z2 5.00 0.15 (0.197 0.006) 5.0 0.2 (0.197 0.008) 5.00 0.15 (0.197 0.006) 0.2 0.008) 0.5 (0.020)REF o0.8 (0.032)REF 5.0 0.2 (0.197 0.008) Z2 Nom 3.5 2.7 2.0 2.0 0.138 0.106 0.079 0.079 * The dimensions in inches are rounded approximations. No Leads (GTCN25-XXXM-R02) (0.020)REF 60.0 4.0 4.4 0.2 5.0 0.2 (0.173 0.008) (2.364 0.158) (0.197 0.008) Z1 Nom in* Figure G4 -- Two Electrode 5mm Product Dimensions Axial Leads (GTCA25-XXXM-R02) 0.5 Y Nom mm 5.00 0.15 (0.197 0.006) 0.5 0.5 4.5 0.3 0.3 4.5 Z2 Nom * The dimensions in inches are rounded approximations. X 0.5 0.5 Z1 Nom Pad Layout - Chip GDT Devices (GTCC23-XXXM-R01) 2.7 2.70.2 0.2 Chip GDT (GTCC23-XXXM-R01) Z2 Y Nom Surface-mount (GTCS25-XXXM-R02) 5.0 0.2 (0.197 0.008) 5.0 0.2 (0.197 0.008) 4.4 0.2 (0.173 0.008) 0.5 (0.020)REF o0.8 (0.032)REF 5.0 0.2 (0.197 0.008) o0.8 60.0 4.0(0.032)REF (2.364 0.158) 5.0 0.2 (0.197 0.008) 1.0 1.0 1.0 1.0 4.5 0.2 0.2 4.5 X Nom X 5.0 0.2 (0.197 0.008) 5.0 0.2 (0.197 0.008) Pad Layout - Surface-mount Devices (GTCS25-XXXM-R02) Y X Nom X Y Nom Z Nom mm 6.0 3.9 1.3 in* 0.236 0.154 0.051 Z Y Y * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. X X Z 76 Z Specifications subject to change without notice. (c)2016 Littelfuse, Inc. RoHS Compliant, ELV Compliant Gas Discharge Tubes (GDTs) Figure G5 -- Two Electrode 6mm Product Dimensions 0.6 (0.024)REF o0.8 6.2 0.2 (0.032)REF (0.244 0.008) 08) No Leads (GTCN26-XXXM-R05) Surface-mount (GTCS26-XXXM-R05) 4.2 0.2 (0.165 0.008) 4.2 0.2 (0.165 0.008) 4.2 0.2 (0.165 0.008) 62.0 2.0 (2.441 0.079) 6.2 0.2 (0.244 0.008) o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) 6.2 0.2 (0.244 0.008) o6.0 0.2 (0.236 0.008) 0.6 Leads Axial (0.024)REF 6.2 0.2 4.2(GTCA26-XXXM-R05) 0.2 (0.244 0.008) (0.165 0.008) 62.0 2.0 (2.441 0.079) (Cont'd) o6.0 0.2 (0.236 0.008) 6.2 0.2 (0.244 0.008) o6.0 0.2 (0.236 0.008) Figures G3-G11 -- Dimensions for Gas Discharge Tubes o0.8 (0.032)REF 0.6 (0.024)REF 4.2 0.2 (0.165 0.008) 6.2 0.2 (0.244 0.008) 4.2 0.2 (0.165 0.008) Pad Layout - Surface-mount Devices (GTCS26-XXXM-R05) Y X Nom X Y Nom Z Nom mm 7.0 3.7 1.3 in* 0.276 0.146 0.051 Z Figure G6 -- Two Electrode 8mm Product Dimensions 8) o8.0 0.2 (0.315 0.008) o8.0 0.2 (0.315 0.008) 8.2 0.2 (0.323 0.008) 62.0 4.0 (2.441 0.157) o0.8 8.2 0.2(0.032)REF (0.323 0.008) 6.0 0.2 (0.236 0.008) 0.5 (0.02)REF 6.0 0.2 (0.236 0.008) 6.0 0.2 (0.236 0.008) 0.5 (0.02)REF 62.0 4.0 (2.441 0.157) o8.0 0.2 (0.236 0.008) o8.0 0.2 (0.315 0.008) 0.5 (0.02)REF 0.5 No Leads Surface-mount (0.02)REF 6.0 0.2 (GTCN28-XXXM-R05, R10 & R20) (0.236 0.008) (GTCS28-XXXM-R05, R10 & R20) Z 8.2 0.2 (0.323 0.008) 0.5 Axial Leads (0.02)REF 8.2 0.2 6.0 0.2 (GTCA28-XXXM-R05, R10 & R20) (0.323 0.008) X o8.0 0.2 (0.315 0.008) Z Y o8.0 0.2 (0.315 0.008) o8.0 0.2 (0.315 0.008) 8.2 0.2 (0.323 0.008) * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. Y o0.8 (0.032)REF 8.2 0.2 (0.323 0.008) 6.0 0.2 (0.236 0.008) Pad Layout - Surface-mount Devices (GTCS28-XXXM-R05, R10 & R20) Y X Nom X Y Nom Z Nom mm 9.0 5.6 1.2 in* 0.354 0.22 0.047 Z * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. Y Y Figure G7 -- Two Electrode 8mm High Voltage Product Dimensions X Axial Leads (GTCA28-XXXM-R0X) o0.8 Z o8 0.2 Z 6 0.2 62 4 RoHS Compliant, ELV Compliant Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 77 7.6 0.2 (0.299 0.008) Gas Discharge Tubes (GDTs) 3X 30.0 2.0 (1.182 0.079) o0.8 (0.032) Figures G3-G11 -- Dimensions for Gas Discharge Tubes 0 (0.01 (Cont'd) Figure G8 -- Three Electrode 5mm Product Dimensions Axial Leaded (GTCA35-XXXM-R05) +0.0 11.4 -2.0 +0.000 0.449 -0.079 7.6 0.2 (0.299 0.008) o5.0 0.2 o5.0 0.2 (0.197 0.008) (0.197 0.008) ) ( o5.0 0.2 (0.197 0.008) 0.5 4.5 4.5 0.020) 77) REF 0.177) REF +0.0 11.4 -2.0+0.0 11.4 -2.0 +0.000 0.449 -0.079 +0.000 0.449 -0.079 7.6 0.2 0.2 (0.299 7.60.008) (0.299 0.008) ( ) ( ) (0.449 +0.000 -0.079 +0.0 ) ( -2.0 8.311.4 0.3 o5.0 0.2 (0.327 0.012) +0.000 (0.197 0.008) 0.449 -0.079 (0.327 0.012) 8.3 0.3 (0.327 0.012) 7.6 0.2 MAX 5.9 (0.299 0.008) 8.3 0.3 (0.327 0.012) ( 7.6 0.2 (0.299 7.60.008) 0.2 o5.0 0.2 MAX 5.9 (0.232) o5.0 0.2 (0.197 0.008) (0.232) (0.197 0.008) MAX 5.9 (0.232) o5.0 0.2 (0.197 0.008) 7.6 0.2 0.2 (0.299 7.60.008) 4.5 (0.299 0.008) 7.6 0.2 4.5 (0.177) REF 13.0 0.5 (0.299 0.008) (0.177) REF (0.512 0.020) 3.8 0.3 (0.151 0.012) ) (0.299 0.008) 7.6 0.2 (0.299 0.008) o5.0 0.2 (0.197o5.0 0.008) 0.2 (0.197 0.008) o5.0 (0.197 o5.0 0 (0.197 0.0 13.0 0.5 (0.51212.0 0.020) Dimensions 0.5 (0.473 0.020) in these drawings 4.5 are in millimeters (inches) (0.177) REF 4.5 (0.177) REF o0.8 o0.8 (0.032) (0.032) 12.0 0.5 (0.473 0.020 4.5 (0.177) REF o0.8 (0.032) o0.8 (0.032) 3.8 0.3 (0.1513.8 0.012) 0.3 (0.151 0.012) o0.8 (0.032) Surface-mount (GTCS35-XXXM-R05) 1.6 (0.327 0.012) 8.3 0.3 (0.327 0.012) 8.3 0.3 (0.327 0.012) +0.0 11.4 -2.0 +0.0 11.4 -2.0 +0.000 8.3 0.3 0.449 -0.079 0.3 (0.327 8.3 0.012) No Leads with-FT 8.3 0.3 (GTCN35-XXXM-R05-FT) 0.3 (0.327 8.3 0.012) ) No Leads (GTCN35-XXXM-R05) o5.0 0.2 (0.197 0.008) 4.5 (0.177) REF 3.8 0.3 0.3 (0.151 3.8 0.012) o0.8 (0.151 0.012) (0.032) 3.8 0.3 (0.151 0.012) Axial Leaded with-FT (GTCA35-XXXM-R05-FT) ) 12.0 0.5 0.5 (0.47312.0 0.020) (0.473 0.020) .8 o0.8 32) (0.032) 9 o5.0 0.2 (0.197 0.008) T Leaded (GTCT35-XXXM-R05) (0.063)REF 1.6 (0.063)REF 0.2 8.3 7.6 0.3 (0.299 0.008) 7.6 0.2 (0.327 0.012) MAX 5.9 o5.0 0.2 o5.0 0.2 (0.299 0.008) MAX 5.9 (0.232) o5.0 0.2 o5.0 0.2 (0.197 0.008) (0.197 0.008) (0.232) (0.197 0.008) MAX 5.9 o5.0(0.197 0.2 0.008) o5.0 MAX 0.2 5.9 o5.0 0.2 o5.0 0.2 (0.232) MAX 5.9 (0.197 0.008) o5.0 0.2 0.4 0.4 (0.197 0.008) (0.197 0.008) o5.0 0.2 (0.232) (0.197 0.008) 1.6 (0.232) (0.197 0.008) 0.4 0.4 (0.016) REF (0.016) REF (0.197 0.008) 2.0 (0.063)REF 1.6 o5.0 0.2 o5.0 0.2 (0.016) REF (0.016) REF 0 0.4 0.4 7.6 0.2 0.0 2.0 (0.063)REF .079) o5.0 0.2 o5.0 0.2 (0.197 0.008) (0.197 0.008) 1.6 0.2 (0.016 (0.016) REF 7.6 0.2 (0.299 7.60.008) 0.4 0.079) (0.197 0.008) (0.016) REF (0.197 0.008) 3X 30.0 2.0 (0.063)REF o5.0 0.2 o5.0 (0.299 0.2 0.008) 1.6 0.2 (0.299 7.6 0.008) (0.016) REF 7.6 0.2 7.6 0.2 (1.182 0.079) 3X 30.0 2.0 (0.063)REF (0.1970.008) 0.008) (0.197 0.008) o5.0 0.2 (0.299 o0.8 (0.299 0.008) 7.6 0.2 (0.299 0.008) (1.182 0.079) (0.197 0.008) (0.032) o0.8 4.5 (0.299 0.008) 7.6 0.2 (0.032) (0.177) REF (0.299 0.008) 8) o0.8 (0.032) 1.6 (0.063)REF Pad Layout - Surface-mount Devices (GTCS35-XXXM-R05) Y1 Y1 Y1 Y2 Y2 X 1.6 (0.063)REF X X MAX 5.9 0.232) X Nom Y1 Nom Y2 Nom Z1 Nom Z2 Nom mm 6.0 3.6 3.6 2.5 1.3 in* 0.236 0.142 0.098 0.051 Y2 o5.0 0.2 (0.197 0.008) Z1 Z2 o5.0 0.2 (0.197 0.008) Z2 7.6 0.2 0.4 (0.299 0.008) (0.016) REF * The dimensions in inches are rounded approximations. o5.0 0.2 o5.0 0.2 Parts with no leads are not solderable and insertion into magazine clips. 7.6 are 0.2meant for (0.197 (0.197 0.008) 0.008) (0.299 0.008) Z1 Z1 o5.0 0.2 0.142 (0.197 0.008) Z2 Y1 Y2 o5.0 0.2 (0.197 0.008) X X 7.6 0.2 (0.299 0.008) Z1 Z2 2 Z2 78 Specifications subject to change without notice. (c)2016 Littelfuse, Inc. RoHS Compliant, ELV Compliant (0.323 0.012) MAX 7.0 (0.276) 12.3 0.5 (0.485 0.020) o0.8 (0.032) REF 8.0 0.5 (0.315 0.020) o0.8 (0.032) REF o0.8 (0.032) REF Figures G3-G11 -- Dimensions for Gas Discharge Tubes 4.7 0.5 4.7 0.5 (0.185 0.020) (Cont'd) (0.185 0.020) 3.8 0.3 (0.150 0.012) Figure G9 -- Three Electrode 6mm Product Dimensions Axial Leaded (GTCA36-XXXM-R05 and R10) 8.0 0.2 8.0 0.2 8.0 0.2 0.008) (0.315 (0.315 0.008) 9.2 0.2 0.008) 8.2 0.3 (0.315 0.008) (0.323 (0.362 0.012) 0 o6.0 0.2 0.2 o6.0 0.2 0.008) 6(0.236 0.008) (0.236 0.008) o6.0 o6.0 0.2 0.2 o6.0 0.2 0.008) (0.236(0.236 0.008) o6.0 0.2 (0.236 0.008) (0.236 0.008) Axial Leaded with-FT (GTCA36-XXXM-R05 and R10-FT) 9.2 0.2 9.2 0.2 9.2 8.2 0.2 0.3 0.008) (0.362(0.362 0.008) (0.362 0.008) (0.323 0.012) 8.2 0.3 8.2 8.2 0.3 0.3 0.3 0.3 (0.323 8.2 0.012) (0.323 0.012) (0.323 8.2 0.012) (0.323 0.012) (0.323 0.012) 8.0 0.2 (0.315 0.008) o6.0 0.2 (0.236 0.008) o0.8 (0.032) REF No Leads with-FT (GTCN36-XXXM-R05 and R10-FT) 1.2 (0.047) REF 8.2 0.3 8.20.3 0.3 8.2 8.2 0.3 (0.323 0.012) (0.323 0.012) 0.012) (0.323 (0.323 0.012) 9.2 0.2 (0.362 0.008) MAX MAX 7.0 7.0 MAX 7.0 (0.276)(0.276) 1.0 (0.276) o6.0 0.2 (0.039) 13.0 0.5 (0.236 0.008) REF (0.512 0.020) 6.0 0.2 (0.032) REF o0.8 (0.032) REF 4.7 0.5 (0.185 0.020) o6.0 0.2 o6.0 o6.0 (0.236 0.2 0.2 0.008) o6.0 o6.0 0.2 0.2 (0.236 0.008) (0.236 0.008) 0.2 (0.236 (0.236 o6.0 0.008) 0.008) (0.236 0.008) 8.0 0.2 9.2 0.2(0.315 0.008) 0.2 (0.362 8.0 0.008) (0.315 0.008)0.75 8.2 0.3 (0.030) REF o6.0(0.323 0.2 0.012) (0.236 0.008) o6.0 0.2 o6.0 0.2 (0.236 0.008) MAX 7.0 (0.236 0.008) (0.276) (0.276) (0.236 0.008) 14.0 0.5 (0.552 0.020) 1.2 12.3 0.5 14.0 0.5 6.0 0.2 (0.047) REF (0.485 0.020) (0.552 0.020) (0.236 0.008) 8.0 0.2 8.0 0.2 8.2 0.2 o0.8 8.0 0.2 0.008) (0.315 (0.315 0.008) 0.008) o0.8 (0.032) REF8.0(0.323 (0.315 0.2 0.008) o0.8 REF (0.032) (0.315 0.008) (0.032) REF Surface-mount (GTCS36-XXXM-R05 and R10) 8.3 0.3 8.3 0.3 8.3 0.3 0.012) (0.327(0.327 0.012) 1.2(0.327 0.012) M MAX 7 (0.276 8 (0.3 8.0 (0.315 are in millimeters (inches) 3.8 0.3 (0.150 0.012) 9.2 0.2 8.2 0.3 (0.362 0.008) Y1 0.012) Y2 (0.323 8.2 0.3 8.2 0.3 (0.323 0.012) (0.323 0.012) 0.75 8.0 0.5 (0.315 0.020) o6.0 0.2 (0.236 0.008) o6.0 o6.00.2 0.2 (0.236 (0.2360.008) 0.008) (0.030) REF (0.236 0.008) MAX 7.0 X MAXMAX 7.0 7(0.276) .0 (0.276) (0.276) o6.0 0.2 (0.236 0.008) 4.7 3.8 0.5 0.3 (0.185 0.020) (0.150 0.012) 3.8 0.3 (0.150 0.012) 3.8 0.3 (0.150 0.012) 12.3 0.5 (0.485 0.020) 12.3 0.5 (0.485 0.020) o0.8 (0.032) REF 8.0 0.2 o0.8 (0.315 0.008) 8.0 (0.032) 0.5 REF o0.8 (0.315 0.020) (0.032) REF 4.7 0.5 (0.185 0.020) 4.7 in 0.5these drawings Dimensions (0.185 0.020) 8.3 0.3 o6.0 0.2 (0.327 0.012) 9.2 0.2 0.75 0.75 (0.236 0.008) (0.362 0.008) 0.2 0.75 9.28.0 0.2 (0.030) REF (0.030) REF (0.315 0.3 0.008) (0.030) REF 8.20.008) (0.362 (0.323 0.012) 6.0 0.2 MAX 7.0o6.0 0.2 o6.0 0.2 0.2 o6.0 o6.0 0.2 (0.236 0.008) o6.0 o6.0 0.2 o6.0 0.2 0.2 (0.236 0.008) (0.236 0.008) (0.236 0.008) (0.236 0.008) (0.236 0.008) 1.0 MAX 7(0.039) .0 REF (0.276) o6.0 0.2 (0.236 0.008) Radial Leaded with-FT (GTCR36-XXXM-R05 and R10-FT) Radial Leaded (GTCR36-XXXM-R05 and R10) o6.0 0.2 (0.236 0.008) 0.2 o6.0 o6.0 o6.0 0.2 0.2 o6.0 0.2 (0.236 0.008) (0.236 (0.2360.008) 0.008) 6.0 0.2 (0.236 0.008) (0.236 0.008) (0.236 0.008) 8.20.2 0.2 8.0 8.00.2 0.2 14.0 0.5 8.0 0.008) 8.0 0.2(0.552 0.020) 0.008) (0.315(0.315 (0.323 0.008) (0.315 0.008) o0.8 (0.315 0.008) No Leads (GTCN36-XXXM-R05 and R10) MAX MAX 7 .0 7.0 MAX 7.0 (0.276)(0.276) 13.0 0.5 MAX 7.0 (0.276) o6.0 0.2 (0.512 0.020) 0.008) 13.0 (0.236 0.5(0.276) 8.0 0.2 (0.512 0.020) 12.3 0.5 o0.8 (0.315 0.008) 8.0 0.2 8.0 8.0 0.5 0.5 (0.485 0.020) o0.8 REF o0.8 (0.032) 8.0 0.2 8.0 0.5(0.315 0.008) o0.8 0.020) (0.315(0.315 0.020) (0.032) REF (0.032) REF o0.8 (0.315 0.008) (0.315 0.020) (0.032)(0.032) REF REF o0.8 (0.032) REF 4.7 0.5 (0.185 0.020) 4.7 0.5 3.8 0.3 3.8 0.3 (0.185 0.020) 3.8 0.5 0.3 4.7 0.012) (0.150(0.150 0.012) (0.1500.020) 0.012) (0.185 12.3 12.3 0.5 0.5 12.3 0.5 0.020) (0.485(0.485 0.020) 14.0 0.5 (0.485 0.020) (0.552 0.020) 13.0 0.5 (0.512 0.020) o0.8 o0.8 8.0 0.2 (0.032) REF (0.032) REF o0.8 (0.032) REF 0.008) o0.8(0.315 (0.032) REF 4.7 4.7 0.5 0.5 4.7 0.5 0.020) (0.185(0.185 0.020) (0.185 0.020) 4.7 0.5 3.8 0.3 (0.185 0.020) (0.150 0.012) 8 o0.8 0.032) REF REF o0.8 (0.032) REF .5 0) 020) 8.0 0.2 (0.315 0.008) o6.0 0.2 (0.236 0.008) (0.323 0.012) o6.0 0.2 (0.236 0.008) Gas Discharge Tubes (GDTs) 13.0 0.5 (0.512 0.020) (0.315 0.008) o6.0 0.2 (0.236 0.008) (0 o6.0 (0.236 8.0 0.2 (0.315 0.008) 8.0 0.2 Z1 (0.315 0.008) 8.0 0.2 (0.315 0.008) Z2 o0.8 (0.032) REF 3.8 0.3 (0.150 0.012) Pad Layout - Surface-mount Devices 1.2 (GTCS36-XXXM-R05 and R10) 8.3 0.3 o6.0 0.2 o6.0 0.2 (0.327 0.012) (0.047) REF 8.3 0.3 1.2 (0.236 0.008) o6.0 o6.0 0.2 0.2 (0.236 0.008) Y1 Y1 Y2 Y2 o6.0 0.2 o6.0 0.2 (0.327 0.012) (0.047) .2 o6.0 0.2 8) 0.008) (0.236(0.236 0.008) 8.3 REF Y1 0.3 Y2(0.236 0.008) (0.236 0.008) 008) (0.236 0.008) o6.0 0.2 o6.0 0.2 (0.327 0.012) (0.047) REF 8.2 0.3 Y1 0.75 Y2 0.2 6.0 0.2 9.2 0.2 (0.236 0.008) (0.236 6.0 0.008) MAX 7.0 (0.323 0.012) Y1 Y2 REF Z1 Z2 6.0 0.2 (0.030) 6.0 0.2 0.2 o6.0 0.2 (0.236 0.008) X 6.0 0.2 (0.236 0.008) (0.362 0.008) MAX 7 MAX 7.0 .0 (0.276) 6.0 0.2 6.0 0.2 6.0 0.2 6.0 0.2 MAX 7 .0 236 0.008) (0.236 0.008) MAX 7 .0 0.008) (0.236 0.008) (0.236 0.008) (0.276)(0.276) Nom Nom Nom Nom(0.236 0.008) X (0.236 0.008) 6.0 Nom X 0.236 0.008) (0.236 0.008) (0.276) (0.276) 6.0 0.2 0.2 X MAX 7.0 1.0 X 1.0 (0.236 0.008) (0.236 7.0 0.008)o6.0 0.2 mm 3.6 3.6 2.5 2.0 (0.276) o6.0 1.0 0.2 1.0 (0.039) REF (0.039) REF 1.2 MAX 7 .0 X 6.0 0.2 1.0 6.0 0.2 1.0 (0.039) REF 1.2 1.2 (0.236 0.008) (0.236 0.008) (0.039) REF 1.0 (0.047) REF (0.276) 6.0 0.2 (0.236 0.008) in* 6.0 0.2 (0.039) REF 8.2 0.2 0.008) REF 1.2 REF (0.047) REF 0.276 (0.039) 0.142 0.142 0.098 6.0(0.236 0.079 1.0(0.039)(0.047) REF 1.2 6.0 0.2 1.0 0.2 6.0 0.2 0.008) 8.2 0.2 14.0 0.5 (0.236(0.236 0.008) (0.323 0.008) (0.047) REF (0.047) REF (0.039) REF 8.2 0.2 (0.236 (0.039) REF 8.2 Z1 0.2 (0.236 0.008) 1.2 Z1Z2 (0.236 0.008) 8.2 0.2(0.552 Z2 0.008) 6.0 0.2 (0.323 0.008) 6.00.020) 0.2 8.2 0.2 (0.047) REF Z1 (0.323 0.2 0.008) 8.2 0.2 Z2 (0.236 0.008) (0.323 0.008) 8.0 (0.236 0.008) 8.2(0.323 0.2 0.008) 8.0 0.2 (0.323 0.008) (0.323 0.008) 0.2 (0.3158.2 0.008) (0.323 0.008) Z1 Z2 (0.315 0.008) o0.8 (0.323 0.008) (0.032) REF * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. 3.8 0.3 (0.150 0.012) Figure G10 -- Three Electrode 7mm Product Dimensions 1.2 (0.047) REF o6.0 0.2 (0.236 0.008) 6.0 0.2 0.2 0.008) 11.5 0.5 (0.236 0.008) (0.453 0.020) 1.0 (0.039) REF 7.0 0.5 (0.276 0.020) o7.5 0.2 6.0 0.2 8.2 0.2 (0.296 0.008) (0.236 0.008) (0.323 0.008) 2.0 (0.079) 1.5 (0.059) 8.3 0.3 Radial Leaded (0.327 0.012) (GTCR37-XXXM-R10) o6.0 0.2 (0.236 0.008) 11.5 0.5 MAX 711.5 .0 0.5 (0.453 0.020) (0.453 0.020) (0.276) 1.0 o7.5REF 0.2 o71.2 .5 0.2 (0.039) (0.296 0.008) (0.296 0.008) (0.047) REF 8.2 0.2 (0.323 0.008) Radial Leaded with-FS Y1 Y2 (GTCR37-XXXM-R10-FS2) o7.5 0.2 11.5 0.5 11.5 0.5 o7.5 0.2 6.0 0.2 (0.296 0.008) (0.296 0.008) (0.236 0.008)(0.453 0.020)(0.453 0.020) X o7.5 0.2 o7.5 0 (0.296 0.008) (0.296 0 6.0 0.2 (0.236 0.008) Z1 7.0 0.5 7.0 0.5 o1.0 o1.0 o1.0 o1.0 (0.276 (0.039) 0.020) REF (0.039) REF (0.039) REF (0.039) REF (0.276 0.020) 4.4 0.3 4.4 0.3 (0.173 0.012) (0.173 0.012) 11.5 (0.453 Z2 7.0 0.5 7.0 0.5 (0.276 0.020) (0.276 0.020) 2.0 (0.079) 4.4 0.3 4.4 0.3 (0.173 0.012) (0.173 0.012) Parts with no leads are not solderable and are meant for insertion into magazine clips. RoHS Compliant, ELV Compliant Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 79 (0.118) (0.406 0.012) 10.0 0.3 10.0 0.2 o8.0 0.2 (0.394 0.012) (0.394 0.008) 8.0 0.2 (0.315 0.008) (0.315 0.008) -0.079 10.0 0.3 MAX 9.2 (0.394 0.012) (0.362) o8.0 0.2 8.0 0.2 (0.315 (0.315 0.008) 0.008) Gas Discharge Tubes (GDTs) 15.5 8.0 0.2 +1.5 4.5 -0 0.008) (0.315 +0 -1.5 1.5+0.000 (0.611 -0.059) 0.5 (0.020) ) 10.3 0.3 8.0 0.2 (0.406 0.012) (0.315 0.008) MAX 9.2 (0.362) 15.0 0.5 (0.591 0.020) 8.0 0.2 MAX 9.2 +1.5 (0.362) 4.5 -0 +0.059 0.177 -0.000 10.0 0.3 8.0 0.2 o1.0 4.4 0.3 (0.394 0.012) (0.315 0.008) (0.039) REF (0.173 0.012) 8.0 0.2 (0.315 0.008) (0.059) +0.059 0.177 -0.000 10.0 0.3 0.5 o1.0 1.5 (0.394 0.012) (0.020) 4.4 0.3 (0.039) REF (0.059) (0.173 0.012) 3.0 (0.118) ) ( M +0 o7.2 0.2 0.2 15.58.0 -1.5 (0.315 0.008) 0.5 +1.5 8.0 0.008) 0.2 (0.315 +0.000 4.5 (0.284 (0.020) -0 1.5 0.008) (0.611 -0.059) (0.315 0.008) (0.059) +0.059 0.5 0.177 -0.000 0.5 1.5 10.0 0.3 (0.020) (0.394o1.0 (0.020) 0.012) (0.059) 1.5 0.3 (0.039) REF 4.4 (0.059) (Cont'd) (0.173 0.012) ) ( Figures G3-G11 -- Dimensions for Gas Discharge Tubes +0.0 Figure G11 -- Three Electrode 8mm Product Dimensions 13.4 -2.0 (0.528 +0.000) ) ( ) ) ( +0.0 13.4 -2.0 10.3 0.3 3.0 10.3 0.3 +0.000 (0.406 (0.118) 0.012) MAX 9. 2 0.528 8.0 0.2 (0.406 0.012) -0.079 (0.362) 15.0 0.5 8.0 o7.2 0.2 0.2 8.0 0.2 8.0 0.2 (0.591 0.020) +1.5 0.008) (0.284 0.008) (0.315 0.008) (0.315 0.008) 4.5 -0 (0.315 8.0 0.2 10.0 0.3 (0.394 0.012) (0.362) MAX 10.8 (0.425) MAX 16.0 MAX 9.2 15.5 0.5 (0.630) (0.362) 78.0 .0 0.5 (0.610 0.020) 10.0 0.3 0.2 7.0 0.5 (0.276 +1.5 (0.394 0.012) +0 0.020) (0.3150.020) 0.008) (0.276 4.5 -0 15.5 -1.5 +1.5 +0.000 4.5 -0 +0.059 (0.611 10.0 0.3 8.0 0.2) -0.059 77 -0.000 o1.0 o1.0 +0.059 (0.394 0.012) (0.315 0.008) 4.4 0.3 (0.039) REF 0.177 (0.039) REF 4.4 0.3 -0.000 o1.0 (0.173 0.012) (0.173 0.012) 4.4 0.3 (0.039) REF o1.0 (0.173 (0.039) 0.012)REF 4.4 0.3 (0.173 0.012) 0.2 0.008) ) (0.059) +1.5 0.5 4.5 -0 (0.020) 4.4 +0.059 0.3 +0.0 (0.039) REF 0.177 o1.0 -0.000 -2.0 (0.1734.4 13.4 0.012) 0.3 (0.039) REF o1.0 +0.000 (0.173 0.012) 0.528 -0.079 (0.039) REF ) ( +0.0 (GTCR38-XXXM-R10) 13.4 -2.0 ( ) ) .2 008) MAX 16.0 (0.630) o7.5 0.2 (0.296 0.008) 10.0 0.3 (0.394 0.012) +0.0 13.4 -2.0 7.0 0.5 (0.276 0.020) +0.000 (0.528 -0.079) 7.0 0.5 ( 10.0 0.3 o8.0 0.2 (0.394 0.012) 10.0 0.3 (0.315 0.008) 0.3o7.5 0.2 (0.394 0.012)10.0 (0.296 (0.394 0.012) 0.008) 8.0 0.2 (0.315 0.008) 10.0 0.3 o7.5 0.2 +0.0 (0.394 0.012) 13.4 -2.0 (0.296 0.008) (0.296 0.008) 10.0 0.3 (0.394 0.012) o7.5 0.2 (0.296 0.008) 0.5 (0.020) o7.5 1.5 0.2 (0.296(0.059) 0.008) o8.0 0.2 MAX (0.315 17.5 0.008) (0.689) o1.0 (0.276 0.020) (0.039) REF 4.4 0.3 MAX 17.5 (0.173 0.012) 7.0 0.5 MAX 10.8 (0.689) o1.0 (0.276 0.020) (0.039) (0.425) REF 4.4 0.3 15.5 0.5 (0.173 0.012) Pad Layout - Surface-mount (0.610 0.020)Devices o1.0 +1.5 (GTCS38-XXXM-R10) 4.5 -0 (0.039) REF 4.4 0.3 (0.173 0.012) +0.059 Y1 Y2 0.177 -0.000 o1.0 10.0 0.3 4.4 0.3 (0.039)(0.394 REF 0.012) (0.173 0.012) X mm o7.5 0.2 ) (0.362) o8.0 0.2 ) ( (0.315 0.008) ) ( 0.354 0.183 X 0.183 0.098 15.5 0.5 10.0(0.610 0.3 0.020) (0.394 0.012) +1.5 (0.630) Z2 ( 1.5 ) o8.0 0.2 (0.315 0.008) +1.5 4.5 -0 18.0 0.5 (0.709 0.020) 10.0 0.3 (0.394 0.012) (0.177 +0.059 -0.000)o7.5 0.2 o1.0 Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 4.4 0.3 (0.039) REF (0.173 0.012) Z2 7.0 0.5 (0.276 0.020) MAX 13.5 o7.5 0.2 (0.296 0.008) Z1 o1.0 +0.0 4.4 0.3 (0.039) REF 13.4 -2.0 (0.173 +0.000 0.012) 0.528 -0.079 Z2 Nom 0.059 Y2 10.0 0.3 8.0 0.2 o7.5 0.2 10.0 0.3 MAX 17 (0.394 0.012)(0.394(0.315 0.008) .0 0.5 (0.296 0.008) 70.012) (0.689) (0.276 0.020) X Z1 Z2 o1.0 (0.039) REF 4.4 0.3 MAX 16.0 (0.173 0.012) (0.177 +0.059 -0.000) 7.0 0.5 (0.276 0.020) Y1 X (0.489) (0.425) 3.0 MAX 9.2 +0.000 0.528 -0.079 7.0 0.5 7.0(0.276 0.5 0.020) (0.296 0.008) Z1 4.5 -0 into magazine clips. Parts with no leads are not solderable and are meant for insertion 80 ) ( 10.3 0.3 ) ( MAX 10.8 4.4 0.3 (0.173 0.012) ) ( (0.276 0.020) Z1 7.0 0.5 Z2 10.0 0.3 (0.276 o7.50.020) 0.2 * The (0.394 dimensions 0.012) in inches are rounded approximations. o1.0 (0.039) REF 15.0 0.5 (0.591 0.020) +1.5 4.5 -0 o7.5 0.2 MAX+0.059 13.5 0.177 (0.296 0.008) (0.489) -0.000 10.0 18.0 0.2 0.5 (0.394(0.709 0.008) 0.020) o1.0 4.4 0.3 (0.039) REF 7.0 0.5 7.0 0.5 +1.5 (0.173 0.012) 4.5 -0 (0.276 0.020) (0.276 0.020) o7.2 0.2 8.0 0.2 +0.059 0.177 -0.000 (0.284 0.008) (0.315 0.008) o1.0 o1.0 4.4 (0.039) 4.4 o1.0 0.3 0.3 4.4 0.3 (0.039) REF REF (0.039) REF (0.173 0.012)0.5 (0.173 0.012) (0.173 0.012) (0.020) 1.5 (0.059) Dimensions in(0.406 these drawings (0.118) o7.5 0.2 0.012) 10.0 0.3 (0.296 0.008) are in millimeters (inches) (0.394 Y1 0.012) Y2 MAX 13.5 o1.0 7.0 0.5 4.4 0.3 (0.489) (0.039) REF o1.0 0.5 (0.276 18.0 0.020) 4.4 0.3 (0.173REF 0.012) (0.039) (0.709 0.020) (0.173 0.012) +1.5 o1.0 4.5 -0 (0.039) REF 4.4 0.3 (0.173 0.012) +0.059 0.177 -0.000 X Y1 o1.0 Y2 Z1 +0.0 (0.039) 13.4 -2.0 Y1REFNom Y24.4 0.3 Nom Nom Nom o8.0 0.2 (0.173 0.012) +0.000 (0.315 0.008) 0.528 9.0 4.65 -0.079 4.65 2.5 in* (0.296 0.008) ) (GTCS38-XXXM-R10) o7.5 0.2 10.0 0.3 (0.394 0.012) 0.008) o8.0 0.2 (0.315 0.008) (0.315 0.008)0.528 +0.000 -0.079 10.0 10.0 0.3 0.3 0.012) o7.5 0.2 (0.394(0.394 0.012) (0.296 0.008) ( ) ( ) ( ) ( ) ( +0 (0.296 8.0 0.2 (0.315 0.008) Radial Leaded with-FS +0.0 13.4 -2.0 (GTCR38-XXXM-R10-FS2) 8.0 0.2 -1.5 +1.5 +0.000 4.5 -0 (0.611 -0.059) o7.5 0.2 10.0 0.3 (0.296 0.008) MAX+0.059 10.8 (0.394 0.012) 0.177 -0.000 X 0.3 3.0 (0.425) 10.3 15.5 0.5 (0.118) (0.406 0.012) MAXo1.0 16.0 MAX 17.5 4.4 0.3 (0.610 0.020) (0.039) (0.630) REF 0 0.5 (0.173 7.0.012) +1.5 7.0 0.5 (0.689) 4.5 -0 (0.276 0.020) MAX 9.2 MAX 16.0 (0.276 0.020) +0.059 Z1 Z2 (0.362) (0.630) 0.177 -0.000 o1.0 7.0 0.5 o1.0o1.0 4.4 0.34.4 0.3 (0.039) REF (0.276 0.020) (0.039) 4.4 0.3 (0.039) REFREF (0.173 (0.173 0.012) 0.012) (0.173 10.0 0.012) 0.3 8.0 0.2 o1.0 0.012) (0.394 (0.315 0.008) (0.039) REF 4.4 0.3 Surface-mount (0.173 0.012) o7.5 0.2 (0.2960.5 0.008) MAX 13.5 10.0 0.3 (0.489) (0.020)(0.394 1.5 0.012) 18.0 0.5 o8.0 0.2 (0.059) (0.709 0.020) X 17.5 (0.315 0.008) MAX 13.5 7.0 0.5 7.0 0.5 .689) (0.489) (0.276 0.020) (0.276 18.0 0.020) +1.5 0.5 4.5 -0 8.0 0.2 (0.709 0.020) (0.315 0.008) +0.059 o1.0 o1.0 0.177 -0.000 +1.5 (0.039) REF 4.4 0.3 o1.0 4.5 (0.039) REF 4.4 0.3 (0.173 0.012) (0.173 0.012) -0 0.5 4.4 0.3 (0.039)+0.059 REF 0.177 (0.020) -0.000 (0.173 1.5 0.012) (0.059) o1.0 Radial Leaded with-FT 4.4 0.3 2 (0.039) REF (0.173 0.012) (GTCR38-XXXM-R10-FT) 008) ( 4.4 0.3 15.5 0.5 (0.039) REF (0.173 0.012) 4.4 0.3 (0.039) REF o1.0 (0.17310.0 0.012) (0.173 0.012) 4.4 0.3 0.3 (0.039) REF (0.394 0.012)+0.0 (0.173 0.012) 13.4 -2.0 +0.000 0.528 -0.079 o8.0 0.2 o7.5 0.2 (0.315 0.008) o7.5 0.2 Y1 (0.296Y2 0.008) ) ( o8.0 0.2 (0.315 0.008) +0.000 0.528 -0.079 +1.5 4.5 -0 o1.0 8.0 0.2 .0(0.315 0.5 15.5 7 0.5 (0.362) 10.0 0.3 8.0 0.2 0.008) 0.5 0.020) (0.394 0.012) 7(0.610 (0.315 0.020) 0.008) .07.0(0.276 0.5 (0.276 0.020) (0.276 0.020) +0.059 o1.0 1.5 0.3 ) 4.4 (0.020) (0.177 (0.039) REFo1.0 -0.000 4.4 (0.059) 0.3 (0.173 0.012) o8.0 0.2 10.3 0.3 (0.315 0.008) (0.406 0.012) +0.000 10.00.528 0.310.0 0.3 -0.079 (0.394 0.012) (0.394 0.012) ) 0.2 .008) (0.630) Radial Leaded with-FS +0.0 (GTCR38-XXXM-R10-FS) 13.4 -2.0 o8.0 0.2 10.0 0.3 +0.000 10.0 0.3 (0.315 0.008) 7.5 0.2 0.528 -0.079 (0.394 0.012) o0.2 (0.394 0.012) o7.2(0.296 +0.08.0 0.2 0.008) 13.4 -2.0 (0.284 0.008) (0.315 0.008) ( MAX 10.8 (0.425) MAX 16.0MAX 9.2 (0.591 0.020) ) ) ( 1.5 (0.059) ) ( ( 10.0 0.2Leaded Radial (0.394 0.008) 3.0 10.3+0.0 0.3 10.0 0.3 13.4 o7.5 0.2 (0.118) (0.406 0.3 0.012) 10.0 -2.0 (0.394 0.012) 8.0 0.2 o7.5 o0.2 10.0 0.3 (0.296 0.008) +0.000 (0.394 0.012) 0.008) 0.528 (0.296 (0.315 0.008) (0.394 0.012) -0.079 10.3 0.3 3.0 MAX 9.2 (0.406 0.012) (0.118) o7.5 0.2 (0.362) (0.296 0.008) ) -0 ) (0.177 +0.059 -0.000o1.0 (0 No Leads with-FT (GTCN38-XXXM-R10-FT) ) ( ) ) ( +0.0 ( 15.0 0.5 8.0 (0.591 0.2 0.020) (0.315 0.008) -0.000 15.5 0.5 MAX 16.0 (0.610 0.020) o1.0 (0.630) 0.50.5 +1.5 (0.020) 4.4 1.5 7.00.3 0.5 1.5REF (0.020) (0.039) 4.5 -0 (0.059)(0.173 (0.2760.012) 0.020) (0.059) +0.059 0.177 -0.000 o1.0 o1.0 4.4 0.3 (0.039) REF 4.4 0.3 (0.039) REF (0.173 0.012) (0.173 0.012) 10.0-2.0 0.3 13.4 10.0 0.2 8.0 0.2 o8.0 o0.2 (0.394+0.000 0.012) o7.5 0.2 (0.394 0.008) (0.315 0.008) 10.0 0.3 0.528 0.008) +0.0(0.315 -0.079 0.008) 13.4 (0.296 (0.394 0.012) -2.0 10.0 0.2 +0.000 0.528 8.0 0.2 (0.394-0.079 0.008) o7.2 0.2 8.0 0.2 (0.315 0.008) MAX 13.5 (0.284 0.008) (0.315 0.008) (0.489) 18.0 0.5 8.0 0.2 0.5 o7.2 0.2 8.0 (0.709 0.020) MAX 17 .5 0.2 0.5(0.284 1.5 0.008) (0.020) (0.315 0.008) (0.315 0.008) 7 . 0 0.5 (0.689) (0.020) 1.5 (0.059) (0.276 +1.5 15.0 0.5 0.020) 4.5 ) ( ) ( ( 8.0 0.2 (0.315 0.008) o8.0 0.2 o8.0(0.315 o7.50.2 0.20.008) (0.315 0.008) (0.296 0.008) ) +1.5 0.2 8.0 o 7.2 0.24.5 -0 MAX (0.284 0.008) (0.315 10.8 0.008) +0.059 (0.425) 0.177 No Leads (GTCN38-XXXM-R10) +0.0 (0.315 0.008) 13.4 +0.0 -2.0 13.4 -2.0 3.0 +0.000 10.0 0.3 10.3 0.3 o8.0 0.2 o7.5 0.2 10.0 0.3 o 7 .5 0.2 0.528 (0.118) +0.000 (0.406 0.012) -0.079 (0.3940.5 0.012) 0.528 (0.296 0.008) (0.394 (0.315 0.012) 0.008) -0.079 (0.296 0.008) 8.0 0.2 o8.0 0.2 10.3 0.3 1.5 (0.020) 3.0 (0.315 0.008) 10.3 0.3 (0.406 0.012) (0.315 0.008) (0.059) (0.118) (0.406 0.012) MAX 9.2 (0.362) ( ) ( Axial Leaded with-FT (GTCA38-XXXM-R10-FT) MAX 9.2 8.0 0.2 15 0.008) ) ( ) ) ( ) +0.0 13.4 -2.0 0.2 10.010.0 0.3 8.0 0.2 +0.000 (0.394 (0.394 0.012) (0.3150.528 0.008) 10.0 0.30.008) -0.079 (0.394 0.012) (0.315 0.008) +0 15.5 -1.5 8.0 0.2 +0.000 (0.611 -0.059 ) (0.315 8.0 0.008) 0.2 (0.315 18.0 0.5 0.008) MAX 9.24.5 +1.5 MAX 9.2 0.5-0 13.5(0.362) (0.362) MAX 1.5 (0.020) +0.059 (0.489) 0.177 -0.000 (0.059) (0.709 0.020) 0.5 o1.0 0.3 10.010.0 (0.020) 0.3 8.0 4.4 1.5 0.3 0.2 (0.039) REF (0.394 0.012) +1.5(0.394 0.012)(0.173 (0.315 0.008) (0.059) 0.012) 4.5 -0 10.0 0.3 +0.059 0.177 -0.000 (0.394 0.012) o1.0 4.4 0.3 (0.039) REF (0.173 0.012) MAX 10.8 15.0 0.5 (0.425)0.177 +0.059 -0.000 (0.591 0.020) 0.5 0.5 +1.5 15.5 0.5 4.5 -0(0.610 0.020) (0.020) o1.0 1.5 1.5 (0.020) +1.5 +0.059 4.4 0.3 (0.059) (0.039) REF (0.059) 4.5 -0 0.177 -0.000 (0.173 0.012) +0.059 o1.0 177 -0.000 (0.039) REF 4.4 0.3 o1.0 (0.173 0.012) 4.4 0.3 (0.039) REF (0.173 0.012) 10.3 0.3 3.0 (0.406 0.012) (0.118) ( 3.0 o8.0 0.2 (0.118) (0.315 0.008) ) ( 13.4with-FS Axial Leaded -2.0 (GTCA38-XXXM-R10-FS2) (0.528 +0.000 -0.079) (0.118) (0.406 0.012) ) ( +0.0 -0.079 Axial Leaded with-FSo8.0 0.2 10.3 0.3 (0.315 10.3 (0.406 0.3 0.012) 3.0 0.008) (GTCA38-XXXM-R10-FS) Axial Leaded +0.0 13.4 -2.0 (GTCA38-XXXM-R10) +0.000 0.528 -0.079 +0.0 13.4 -2.0 +0.0 10.0 0.2 10.0 0.3 13.4 +0.000 -2.0 (0.394 o0.008) 0.528 o8.0 0.2 8.0 0.2 (0.394 0.012) -0.079 8.0 0.2 +0.000 (0.315 0.008) (0.315 0.008) 0.528 (0.315 0.008) -0.079 7.0 0.5 (0.276 0.020) MAX 17.5 (0.689) (0.296 0.008) o1.0 RoHSREF Compliant, ELV Compliant 4.4 0.3 (0.039) (0.173 0.012) 7.0 0.5 (0.276 0.020) Gas Discharge Tubes (GDTs) Fail-Short Mechanism for Gas Discharge Tubes Fail-Short Mechanism -- FS Figure G12 Short Circuit Spring The FS fail-short mechanism is a short circuit spring mounted onto a solder pellet located at the center electrode of the gas tube. Under normal operating conditions, the pellet is positioned to make the spring float above the outer electrodes, as shown in Figure G11 on the previous page.. When a prolonged discharge event causes the gas tube temperature to reach the melting point of the solder, the pellet softens allowing the short circuit spring to contact with both outer electrodes (Figure G12). This process results in a permanent short circuit b etween all three electrodes creating a low resistance path that conducts the fault current to ground without generating a significant amount of heat. Fail-Short Mechanism -- FT Solder Pellet Outer Electrode Ceramic Tube Center Electrode Figure G13 Short Circuit Spring The FT fail-short mechanism is a short circuit spring with a piece of plastic foil spot welded onto the center electrode. Under normal operating conditions, the plastic foil makes the spring insulated from the two outer electrodes. When a prolonged discharge event causes the gas tube temperature to reach the melting point of the plastic foil, the plastic foil melts allowing the short circuit spring to contact both outer electrodes (Figure G13). This process results in a permanent short circuit b etween all three electrodes creating a low resistance path that conducts the fault current to ground without generating a significant amount of heat. Plastic Foil Ceramic Tube Outer Electrode Center Electrode Operation and Storage Temperatures for Gas Discharge Tubes Operation Temperature Range Models without Fail-Short Mechanism : -40C/+90C Models with Fail-Short Mechanism : -20C/+65C Storage Temperature Range Models without Fail-Short Mechanism : -40C/+90C Models with Fail-Short Mechanism : -20C/+65C Packaging Information for Gas Discharge Tubes Parts in Bulk Part Description 3mm 2Pole Surface-mount Min Order Quantity Parts in Tape and Reel Box Quantity Tape and Reel Min Order Quantity Box Quantity -- -- 2000 16000 5mm 2Pole No leads 5000 20000 -- -- 5mm 2Pole Leads 1000 5000 -- -- -- -- 1500 12000 6mm 2Pole No leads 2000 10000 -- -- 6mm 2Pole Leads 1000 5000 -- -- 6000 5mm 2Pole Surface-mount 6mm 2Pole Surface-mount -- -- 750 8mm 2pole No leads 2000 10000 -- -- 8mm 2Pole Leads 1000 5000 -- -- 4000 8mm 2Pole Surface-mount -- -- 500 5mm 3Pole No leads 2500 10000 -- -- 5mm 3Pole Leads 1000 5000 -- -- 8000 5mm 3Pole Surface-mount -- -- 1000 6mm 3Pole No leads 2500 10000 -- -- 6mm 3Pole Leads 1000 5000 -- -- 4500 -- -- 750 7mm 3Pole Leads 6mm 3Pole Surface-mount 1000 5000 -- -- 8mm 3Pole No leads 1000 5000 -- -- 8mm 3Pole Leads 1000 5000 -- -- -- -- 500 2500 8mm 3Pole Surface-mount RoHS Compliant, ELV Compliant Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 81 Gas Discharge Tubes (GDTs) Installation for Gas Discharge Tubes Care should be taken when installing GDTs equipped with fail-short mechanisms into arrester magazines, printed circuit boards, etc. Too much downward pressure may force the short circuit spring through the thin insulation tube creating a shorted condition. Solder Reflow Recommendations for Surface-mount GDT Devices Surface-mount GDTs can be soldered using standard Pb-free reflow profiles. Table G4 -- Tape and Reel Specifications Tape Dimension EIA Mark 3mm devices (2 pole) Dimension (mm) 5mm devices (2 pole) Dimension (mm) 6mm devices (2 pole) Dimension (mm) 8mm devices (2 pole) Dimension (mm) A0 3.400.10 4.90.10 6.700.10 8.600.10 B0 5.000.10 5.50.10 4.600.10 6.400.10 D0 1.50+0.10/-0 1.50+0.10/-0 1.50+0.10/-0 1.50+0.10/-0 D1 -- 1.5 MIN -- -- E1 1.750.10 1.750.10 1.750.10 1.750.10 14.250.30 E2 14.250.30 14.250.30 14.250.30 F 7.500.10 7.500.10 7.500.10 7.500.10 P0 4.000.10 4.000.10 4.000.10 4.000.10 P1 8.000.10 8.000.10 12.000.10 12.000.10 P2 2.000.10 2.000.10 2.000.10 2.000.10 W 16.000.30 16.000.30 16.000.30 16.000.30 Dimension (mm) TapeThickness EIA Mark Dimension (mm) Dimension (mm) Dimension (mm) B1 -- -- -- -- K0 3.300.10 5.300.10 6.500.10 8.500.10 T 0.350.05 0.400.05 0.350.05 0.500.05 T1 -- -- -- -- T2 -- -- -- -- Dimension (mm) Reel Dimension EIA Mark Dimension (mm) Dimension (mm) Dimension (mm) A 330 330 330 330 B 2.200.50 2.200.50 2.200.50 2.200.50 C 13.000.20 13.000.20 13.000.20 13.000.20 D 20.201.00 20.201.00 20.201.00 20.201.00 N 100.001.00 100.001.00 100.001.00 100.001.00 W1 16.500.10 16.500.10 16.500.10 16.500.10 W2 21.1002.00 21.1002.00 21.1002.00 21.1002.00 Figure G14 -- EIA Referenced Taped Component Dimensions T oD0 T2 P2 P0 [10 pitches cumulative tolerance on tape 0.2mm] E1 A0 F K0 B0 B1 T1 Cover Tape B1 is for tape feeder reference only, including draft concentric about B0 82 Center Lines of Cavity P1 oD1 W E2 Embossment User Direction of Unreeling Specifications subject to change without notice. (c)2016 Littelfuse, Inc. RoHS Compliant, ELV Compliant Gas Discharge Tubes (GDTs) Table G5 -- Tape and Reel Specifications Tape Dimension EIA Mark 5mm devices (3 pole) Dimension (mm) 6mm devices (3 pole) Dimension (mm) 8mm devices (3 pole) Dimension (mm) A0 5.400.10 6.500.10 8.500.10 B0 8.000.10 8.600.10 10.600.10 1.50+0.10/-0 D0 1.50+0.10/-0 1.50+0.10/-0 D1 1.50(min) 1.50(min) -- E1 1.750.10 1.750.10 1.750.10 E2 14.250.30 22.250.30 22.250.30 F 7.500.10 11.500.10 11.500.10 P0 4.000.10 4.000.10 4.000.10 P1 8.000.10 12.000.10 16.000.10 P2 2.000.10 2.000.10 2.000.10 W 16.000.30 24.000.30 24.000.30 Dimension (mm) TapeThickness EIA Mark Dimension (mm) Dimension (mm) B1 -- -- -- K0 5.700.10 6.300.10 8.400.10 T 0.500.05 0.500.05 0.500.05 T1 -- -- -- T2 -- -- -- Dimension (mm) Reel Dimension EIA Mark Dimension (mm) Dimension (mm) A 330 330 330 B 2.200.50 2.200.50 2.200.50 C 13.000.20 13.000.20 13.000.20 D 20.201.00 20.201.00 20.201.00 N 100.001.00 100.001.00 100.001.00 W1 16.500.10 24.500.10 24.500.10 W2 21.1002.00 29.1002.00 29.1002.00 W3 -- -- -- Figure G15 -- EIA Referenced Reel Dimensions Full Radius Access Hole at Slot Location (o40mm min.) W3 (Includes Flange Distortion at Outer Edge) W2 (Measured at Hub) A C D N (Hub Diameter, Maximum Weight of Reel and Contents = 13.6kg) (Arbor Hole Diameter) W1 (Measured at Hub) B RoHS Compliant, ELV Compliant If Present, Tape Slot in Core for Tape Start: 4.5 0.05 Width x 10.0mm (min) Depth Specifications subject to change without notice. (c)2016 Littelfuse, Inc. 83 Gas Discharge Tubes (GDTs) Part Numbering System for Gas Discharge Tubes Example Part Number GT C S 2 3 - 231 M - R 01 - FS - 2 Packaging 2 = Tape and Reel Nothing = Tray Packaging FS = Solder Pellet Fail Short Mechanism on Top FS2 = Solder Pellet Fail Short Mechanism on Bottom FT = Plastic Fail Short Mechanism on Top Surge Rating 01 = 8x20s 1kA, 10 Hits 02 = 8x20s 2.5kA, 10 Hits 05 = 8x20s 5kA, 10 Hits 10 = 8x20s 10kA, 10 Hits 20 = 8x20s 20kA, 10 Hits Product Family Designator R = R Series Tolerance of 20% on DC Switch Voltage DC Switch Voltage of 230V 23 x 10*1 = 230V, 23 x 10*2 = 2300V Diameter 3 = 3mm 5 = 5mm 6 = 6mm 7 = 7.5mm 8 = 8mm Number of Electrodes (2, 3) Lead Configuration A = Axial Leads C = Chip Type N = No Leads R = Radial Leads S = Surface-Mount T = T-Shape Leads Ceramic Gas Tube NOTE: GTCS23-XXXM-R01 and GTCC23-XXXM-R01 parts available only in surface-mount and tape and reel packaging. Marking Reference Guide -- Example 352 R 05 GN Year and Week of Manufacture G = First Half of 2004 N = Week 14 Per Manufacturer's Lot Number System 8x20s 10 Hits Surge Current (05=5kA) Product Family Designator R = R Series Voltage Designator (35 = 350V, 352=3500V) Manufacturer's Mark NOTES: G TCS23-XXXM-R01 and GTCC23-XXXM-R01 parts will have no marking. Devices with no leads (GTCNxx-xxxx-xx) are not able to be soldered as their electrodes are nickel plated. They should be installed by insertion into a magazine clip. Notice: Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. 84 Specifications subject to change without notice. (c)2016 Littelfuse, Inc. RoHS Compliant, ELV Compliant