Gas Discharge Tubes Gas Discharge Tubes (GDTs) TE Circuit Protection'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 make 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 Features * 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 * New surface-mount devices for automated manufacturing * RoHS compliant * Halogen free (refers to: Br#900ppm, Cl#900ppm, Br+Cl#1500ppm) 9 * Wide range of voltages (75V-4000V) * Wide range of form factors (3mm, 5mm, 6mm, 7mm, 8mm diameter devices) * Low capacitance and insertion loss * Crowbar device with low arc voltage * High accuracy spark-over voltages for high precision designs * Devices tested per ITU K.12 recommendations * Various lead configurations and surface-mount options * Optional fail-short mechanism * Non radioactive materials * Devices certified to UL497B and UL1449 Applications * Telecommunications - MDF modules, xDSL equipment, RF systems, antenna, base stations RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 95 HF Halogen Free * Industrial and Consumer Electronics - Power supplies, surge protectors, alarm systems, irrigation systems 95 8/3/13 11:05 AM Figures G1-G2 Typical Circuits for Gas Discharge Tubes (GDTs) Figure G1 Figure G2 Three Electrode Devices for Grounded Circuits Two Electrode Devices for Ungrounded Circuits PolySwitch Device (A) Telecom Line (A') Protected Equipment GDT (B) PolySwitch Device (A) Telecom Line Thyristor (B') (A') Protected Equipment GDT (B) Thyristors (B') PolySwitch Device Table G1 Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Two-Electrode Gas Discharge Tubes (GDTs) DC Sparkover Voltage Part Number Impulse Sparkover Voltage @ 100V/s 20% Tolerance @ 1kV/s 75* 600 GTCS23-XXXM-R01-2 GTCC23-XXXM-R01-2 90 600 140 600 150 600 200 700 230 700 300 900 350 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 9 DC Sparkover Voltage Part Number GTCX25-XXXM-R02 GTCX26-XXXM-R05 GTCX28-XXXM-R05 GTCX28-XXXM-R10 GTCX28-XXXM-R20** Impulse Sparkover Voltage DC Holdover Voltage Impulse Life AC Discharge Current (1s duration; 10 hits) Capacitance Insulation Resistance UL Rating 8x20s 10 Hits 10x1000s 300 Hits @ 50 Hz @ 1MHz @ 100VDC UL497B #E179610 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 On-State Voltage Impulse Discharge Current @ 100V/s 20% Tolerance @ 100V/s @ 1kV/s Per ITU K.12 Nominal (@1A) (V) 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 ** GTCX28-XXXM-R20 parts only up to 350V <1.2pF for 75V and 90V devices. 96 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 96 HF Halogen Free 8/3/13 11:05 AM Gas Discharge Tubes Table G2 Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Two Electrode High-Voltage Gas Discharge Tubes (GDTs) DC Sparkover Voltage Impulse Sparkover Voltage Impulse Life @100V/s 20% Tolerance @ 100V/s 10/1000s 100A Multiple Hits (1s Duration: 10 Hits) Single Hit, 9 Cycles 10 Hits (5 Hits Each Polarity) GTCA28-801M-R05 800 1400 300 times 5A N/A GTCA28-102M-R03 1000 1700 N/A 1A GTCA28-122M-R03 1200 1900 N/A 1A GTCA28-152L-R03 1500 ( 15%) 2200 N/A GTCA28-212M-R03 2100 2700 GTCA28-242M-R03 2400 GTCA28-252M-R03 2500 GTCA28-272L-R03 Impulse Discharge Current 8/20s AC Discharge Current, 50Hz Capacitance UL Rating 1 Hit @ 1MHz UL1449 #E332226 5kA N/A <1pF 3 5A 3kA 10kA <1pF 3 5A 3kA 10kA <1pF 3 1A 5A 3kA 10kA <1pF 3 N/A 1A 5A 3kA 10kA <1pF 3 3300 N/A 1A 5A 3kA 10kA <1pF 3 3500 N/A 1A 5A 3kA 10kA <1pF 3 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 GTCA28-312L-R03 3100 ( 15%)* 3700 300 Times N/A N/A 3kA 10kA <1pF 3 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 Part Number Note: Insulation resistance: $10,000M (all parts measured @ 1000VDC, except 800V/1000V/1200V @250VDC; 1500V/2100V @ 500VDC) * DC Sparkover Voltage measured at 5kV/s Measured with 8/20s,100A impulse Measured at 1000V/s Table G3 Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance and Agency Approval for Three-Electrode Gas Discharge Tubes (GDTs) 9 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) Impulse Life (A+B-E) AC Discharge Current (1s duration; 10 hits) (A+B-E) Capacitance Insulation Resistance UL Rating DC Holdover Voltage On-State Voltage Impulse Discharge Current (A+B-E) Nominal (@1A) (V) 8x20s 10 Hits 10x1000s 300 Hits @ 50 Hz @ 1MHz @ 100VDC* UL497B #E179610 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 @ 100V/s 20% Tolerance @ 100V/s @ 1kV/s Per ITU K.12 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 * Insulation resistance measured at 50V for devices less than 150V. Insulation resistance measured at 250V for devices more than 500V. RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 97 HF Halogen Free 97 8/3/13 11:05 AM Figures G3-G11 Dimensions for Gas Discharge Tubes (GDTs) Figure G3 Two Electrode 3mm Product Dimensions Pad Layout - Surface-mount Devices (GTCS23-XXXM-R01) 3.0 0.2 o3 .0 Surface-mount (GTCS23-XXXM-R01) 1.0 X 1.0 Z1 Z2 Y Z1 Z2 Nom Nom Nom mm 3.0 2.0 2.0 2.0 in* 0.118 0.079 0.079 0.079 * The dimensions in inches are rounded approximations. 3.0 0.2 4.5 0.2 Pad Layout - Chip GDT Devices (GTCC23-XXXM-R01) 2.7 0.2 Chip GDT (GTCC23-XXXM-R01) 0.5 Y X Nom X 0.5 3.2 0.2 4.5 0.3 Z1 Y Z2 X Y Z1 Z2 Nom Nom Nom Nom mm 3.5 2.7 2.0 2.0 in* 0.138 0.106 0.079 0.079 * The dimensions in inches are rounded approximations. Figure G4 Two Electrode 5mm Product Dimensions No Leads (GTCN25-XXXM-R02) 5.00 0.15 (0.197 0.006) 9 5.00 0.15 (0.197 0.006) 60.0 4.0 (2.364 0.158) o0.8 (0.032)REF Surface-mount (GTCS25-XXXM-R02) 5.0 0.2 (0.197 0.008) 4.4 0.2 (0.173 0.008) 0.5 (0.020)REF 5.0 0.2 (0.197 0.008) Axial Leads (GTCA25-XXXM-R02) 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 X Y Z Nom Nom Nom mm 6.0 3.9 1.3 in* 0.197 0.154 0.051 Z * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. 98 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 98 HF Halogen Free 8/3/13 11:05 AM Gas Discharge Tubes Figures G3-G11 Dimensions for Gas Discharge Tubes (GDTs) Cont'd Figure G5 Two Electrode 6mm Product Dimensions No Leads (GTCN26-XXXM-R05) o0.8 (0.032)REF o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) 62.0 2.0 (2.441 0.079) Surface-mount (GTCS26-XXXM-R05) 4.2 0.2 (0.165 0.008) 4.2 0.2 (0.165 0.008) 0.6 (0.024)REF 6.2 0.2 (0.244 0.008) Axial Leads (GTCA26-XXXM-R05) 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 X Y Z Nom Nom Nom mm 7.0 3.7 1.3 in* 0.276 0.146 0.051 Z * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. Figure G6 Two Electrode 8mm Product Dimensions o0.8 (0.032)REF 6.0 0.2 (0.236 0.008) 6.0 0.2 (0.236 0.008) o8.0 0.2 (0.315 0.008) o8.0 0.2 (0.315 0.008) o8.0 0.2 (0.315 0.008) 62.0 4.0 (2.441 0.157) Surface-mount (GTCS28-XXXM-R05, R10 & R20) 8.2 0.2 (0.323 0.008) No Leads (GTCN28-XXXM-R05, R10 & R20) Axial Leads (GTCA28-XXXM-R05, R10 & R20) 0.5 (0.02)REF 6.0 0.2 (0.236 0.008) 0.5 (0.02)REF 9 8.2 0.2 (0.323 0.008) Pad Layout - Surface-mount Devices (GTCS28-XXXM-R05, R10 & R20) Y X X Y Z Nom Nom 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. Figure G7 Two Electrode 8mm High Voltage Product Dimensions Axial Leads (GTCA28-XXXM-R0X) o8 0.2 o0.8 6 0.2 62 4 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 99 HF Halogen Free 99 8/3/13 11:05 AM Figures G3-G11 Dimensions for Gas Discharge Tubes (GDTs) Cont'd Figure G8 Three Electrode 5mm Product Dimensions Axial Leaded (GTCA35-XXXM-R05) Axial Leaded with-FT (GTCA35-XXXM-R05-FT) +0.0 11.4 -2.0 +0.000 0.449 -0.079 7.6 0.2 (0.299 0.008) +0.0 11.4 -2.0 +0.000 0.449 -0.079 ) ( No Leads (GTCN35-XXXM-R05) ) ( o5.0 0.2 (0.197 0.008) 8.3 0.3 (0.327 0.012) 7.6 0.2 (0.299 0.008) o5.0 0.2 (0.197 0.008) 7.6 0.2 (0.299 0.008) o5.0 0.2 (0.197 0.008) 12.0 0.5 (0.473 0.020) 4.5 (0.177) REF 13.0 0.5 (0.512 0.020) 4.5 (0.177) REF o0.8 (0.032) 3.8 0.3 (0.151 0.012) Dimensions in these drawings are in millimeters (inches) o0.8 (0.032) 3.8 0.3 (0.151 0.012) No Leads with-FT (GTCN35-XXXM-R05-FT) T Leaded (GTCT35-XXXM-R05) Surface-mount (GTCS35-XXXM-R05) 8.3 0.3 (0.327 0.012) 7.6 0.2 (0.299 0.008) 1.6 (0.063)REF o5.0 0.2 (0.197 0.008) o5.0 0.2 (0.197 0.008) MAX 5.9 (0.232) o5.0 0.2 (0.197 0.008) 0.4 (0.016) REF 7.6 0.2 (0.299 0.008) 7.6 0.2 (0.299 0.008) o5.0 0.2 (0.197 0.008) o0.8 (0.032) 3X 30.0 2.0 (1.182 0.079) Pad Layout - Surface-mount Devices (GTCS35-XXXM-R05) 9 Y1 Y2 X Z1 X Y1 Y2 Z1 Z2 Nom Nom Nom Nom Nom mm 6.0 3.6 3.6 2.5 1.3 in* 0.236 0.142 0.142 0.098 0.051 Z2 * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. 100 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 100 HF Halogen Free 8/3/13 11:05 AM Cont'd Figure G9 Three Electrode 6mm Product Dimensions Axial Leaded (GTCA36-XXXM-R05 and R10) No Leads (GTCN36-XXXM-R05 and R10) Axial Leaded with-FT (GTCA36-XXXM-R05 and R10-FT) 8.0 0.2 (0.315 0.008) 8.2 0.3 (0.323 0.012) 0.75 (0.030) REF o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) 12.3 0.5 (0.485 0.020) o6.0 0.2 (0.236 0.008) 13.0 0.5 (0.512 0.020) 8.0 0.2 (0.315 0.008) o0.8 (0.032) REF 4.7 0.5 (0.185 0.020) 8.2 0.3 (0.323 0.012) 8.0 0.2 (0.315 0.008) o0.8 (0.032) REF 4.7 0.5 (0.185 0.020) No Leads with-FT (GTCN36-XXXM-R05 and R10-FT) Dimensions in these drawings are in millimeters (inches) Radial Leaded (GTCR36-XXXM-R05 and R10) Radial Leaded with-FT (GTCR36-XXXM-R05 and R10-FT) 9.2 0.2 (0.362 0.008) 8.2 0.3 (0.323 0.012) 9.2 0.2 (0.362 0.008) o6.0 0.2 (0.236 0.008) o6.0 0.2 (0.236 0.008) MAX 7.0 (0.276) o0.8 (0.032) REF 8.0 0.5 (0.315 0.020) 3.8 0.3 (0.150 0.012) Surface-mount (GTCS36-XXXM-R05 and R10) 1.2 (0.047) REF 8.2 0.2 (0.323 0.008) o0.8 (0.032) REF 3.8 0.3 (0.150 0.012) Pad Layout - Surface-mount Devices (GTCS36-XXXM-R05 and R10) Y1 o6.0 0.2 (0.236 0.008) 6.0 0.2 (0.236 0.008) 1.0 (0.039) REF o6.0 0.2 (0.236 0.008) MAX 7.0 (0.276) 14.0 0.5 (0.552 0.020) 8.0 0.2 (0.315 0.008) Gas Discharge Tubes Figures G3-G11 Dimensions for Gas Discharge Tubes (GDTs) Y2 Z1 Y1 Y2 Z1 Z2 Nom Nom Nom Nom Nom mm 7.0 3.6 3.6 2.5 2.0 in* 0.276 0.142 0.142 0.098 0.079 X 6.0 0.2 (0.236 0.008) X 9 Z2 * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. Figure G10 Three Electrode 7mm Product Dimensions Radial Leaded (GTCR37-XXXM-R10) 11.5 0.5 (0.453 0.020) 11.5 0.5 (0.453 0.020) 11.5 0.5 (0.453 0.020) o7.5 0.2 (0.296 0.008) o7.5 0.2 (0.296 0.008) o7.5 0.2 (0.296 0.008) 2.0 (0.079) Radial Leaded with-FS (GTCR37-XXXM-R10-FS2) 1.5 (0.059) o1.0 (0.039) REF 4.4 0.3 (0.173 0.012) 7.0 0.5 (0.276 0.020) o1.0 (0.039) REF 7.0 0.5 (0.276 0.020) 4.4 0.3 (0.173 0.012) Parts with no leads are not solderable and are meant for insertion into magazine clips. RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 101 HF Halogen Free 101 8/3/13 11:05 AM Figures G3-G11 Dimensions for Gas Discharge Tubes (GDTs) Cont'd Figure G11 Three Electrode 8mm Product Dimensions Axial Leaded with-FS (GTCA38-XXXM-R10-FS) Axial Leaded (GTCA38-XXXM-R10) +0.0 13.4 -2.0 +0.0 13.4 -2.0 +0.000 0.528 -0.079 (0.528 +0.000 -0.079) 8.0 0.2 (0.315 0.008) +1.5 4.5 -0 +0.059 0.177 -0.000 o1.0 (0.039) REF (0.489) ) ( ( 4.4 0.3 (0.173 0.012) +0.0 13.4 -2.0 +0.000 0.528 -0.079 ( ( ) o1.0 (0.039) REF ) o1.0 (0.039) REF No Leads (GTCN38-XXXM-R10) o8.0 0.2 (0.315 0.008) 10.3 0.3 (0.406 0.012) o7.2 0.2 (0.284 0.008) 0.5 (0.020) +0 15.5 -1.5 +0.000 (0.611 -0.059) ) ( 4.4 0.3 (0.173 0.012) 15.5 0.5 (0.610 0.020) +1.5 4.5 -0 +0.059 0.177 -0.000 4.4 0.3 (0.173 0.012) No Leads with-FT (GTCN38-XXXM-R10-FT) 10.0 0.2 (0.394 0.008) ) +1.5 4.5 -0 +0.059 0.177 -0.000 o1.0 (0.039) REF (0.425) 18.0 0.5 (0.709 0.020) +1.5 4.5 -0 +0.059 0.177 -0.000 Axial Leaded with-FT (GTCA38-XXXM-R10-FT) o8.0 0.2 (0.315 0.008) ) ( (0.315 0.008) MAX 10.8 MAX 13.5 15.0 0.5 (0.591 0.020) +0.0 13.4 -2.0 +0.000 0.528 -0.079 o8.0 0.2 ) ( Axial Leaded with-FS (GTCA38-XXXM-R10-FS2) 10.3 0.3 (0.406 0.012) 3.0 (0.118) 10.0 0.3 (0.394 0.012) 8.0 0.2 (0.315 0.008) MAX 9.2 8.0 0.2 (0.315 0.008) (0.362) 1.5 (0.059) 4.4 0.3 (0.173 0.012) Radial Leaded (GTCR38-XXXM-R10) Radial Leaded with-FS (GTCR38-XXXM-R10-FS) 10.0 0.3 (0.394 0.012) Radial Leaded with-FS (GTCR38-XXXM-R10-FS2) o7.5 0.2 (0.296 0.008) 10.0 0.3 (0.394 0.012) 10.0 0.3 (0.394 0.012) o7.5 0.2 (0.296 0.008) o7.5 0.2 (0.296 0.008) 9 7.0 0.5 (0.276 0.020) o1.0 (0.039) REF 7.0 0.5 (0.276 0.020) o1.0 (0.039) REF 4.4 0.3 (0.173 0.012) Radial Leaded with-FT (GTCR38-XXXM-R10-FT) o1.0 (0.039) REF 4.4 0.3 (0.173 0.012) Surface-mount (GTCS38-XXXM-R10) 10.0 0.3 (0.394 0.012) o8.0 0.2 (0.315 0.008) Dimensions in these drawings are in millimeters (inches) 8.0 0.2 (0.315 0.008) MAX 16.0 (0.630) o1.0 (0.039) REF 7.0 0.5 (0.276 0.020) (0.689) 4.4 0.3 (0.173 0.012) o7.5 0.2 (0.296 0.008) 10.0 0.3 (0.394 0.012) MAX 17.5 7.0 0.5 (0.276 0.020) 0.5 (0.020) 1.5 (0.059) 4.4 0.3 (0.173 0.012) Pad Layout - Surface-mount Devices (GTCS38-XXXM-R10) Y1 Y2 X Z1 X Y1 Y2 Z1 Z2 Nom Nom Nom Nom Nom mm 9.0 4.65 4.65 2.5 1.5 in* 0.354 0.183 0.183 0.098 0.059 Z2 * The dimensions in inches are rounded approximations. Parts with no leads are not solderable and are meant for insertion into magazine clips. 102 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 102 HF Halogen Free 8/3/13 11:05 AM Gas Discharge Tubes Fail-Short Mechanism for Gas Discharge Tubes (GDTs) Fail-Short Mechanism - FS 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 between all three electrodes creating a low resistance path that conducts the fault current to ground without generating a significant amount of heat. Figure G12 Short Circuit Spring Solder Pellet Outer Electrode Ceramic Tube Center Electrode Fail-Short Mechanism - FT 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 between all three electrodes creating a low resistance path that conducts the fault current to ground without generating a significant amount of heat. Figure G13 Short Circuit Spring Plastic Foil Ceramic Tube Outer Electrode Center Electrode Operation and Storage Temperatures for Gas Discharge Tubes (GDTs) 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 9 Packaging Information for Gas Discharge Tubes (GDTs) Part Description Parts in Bulk Min Order Box Quantity Quantity 3mm 2Pole Surface-mount Parts in Tape and Reel Tape and Reel Box Min Order Quantity 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 - - - - 750 6000 8mm 2pole No leads 2000 10000 - - 8mm 2Pole Leads 1000 5000 - - - - 500 4000 5mm 3Pole No leads 2500 10000 - - 5mm 3Pole Leads 1000 5000 - - - - 1000 8000 6mm 3Pole No leads 2500 10000 - - 6mm 3Pole Leads 1000 5000 - - - - 750 4500 7mm 3Pole Leads 1000 5000 - - 8mm 3Pole No leads 1000 5000 - - 8mm 3Pole Leads 1000 5000 - - - - 500 2500 5mm 2Pole Surface-mount 6mm 2Pole Surface-mount 8mm 2Pole Surface-mount 5mm 3Pole Surface-mount 6mm 3Pole Surface-mount 8mm 3Pole Surface-mount RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 103 HF Halogen Free 103 8/3/13 11:05 AM Installation for Gas Discharge Tubes (GDTs) 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 for GDT Devices 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) 8.600.10 A0 3.400.10 4.90.10 6.700.10 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 E2 14.250.30 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 9 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 20.201.00 100.001.00 N 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 for GDT Devices T oD0 P2 T2 P0 [10 pitches cumulative tolerance on tape 0.2mm] E1 A0 F K0 B0 B1 P1 T1 Cover Tape B1 is for tape feeder reference only, including draft concentric about B0 104 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 104 W E2 Center Lines of Cavity oD1 Embossment User Direction of Unreeling HF Halogen Free 8/3/13 11:05 AM 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 D0 1.50+0.10/-0 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 - - - Gas Discharge Tubes (Cont'd) Table G5 Tape and Reel Specifications for GDT Devices 9 Figure G15 EIA Referenced Reel Dimensions for GDT Devices 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 2013_CP_S09-GDT.indd 105 HF Halogen Free If Present, Tape Slot in Core for Tape Start: 4.5 0.05 Width x 10.0mm (min) Depth 105 8/3/13 11:05 AM Part Numbering System for Gas Discharge Tubes (GDTs) Cont'd Example Part Number for GDTs 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 8 = 8mm Number of Electrodes (2, 3) Lead Configuration A = Axial Leads C = Chip Type N = No 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. 9 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: GTCS23-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 : Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability and test each product selected for their own applications. Tyco Electronics Corporation and its affiliates in the TE Connectivity Ltd. group of companies ("TE") reserves the right to change or update, without notice, any information contained in this publication; to change, without notice, the design, construction, processing, or specification of any product; and to discontinue or limit production or distribution of any product. This publication supersedes and replaces all information previously supplied. Without express written consent by an officer of TE, TE does not authorize the use of any of its products as components in nuclear facility applications, aerospace, or in critical life support devices or systems. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. TE's only obligations are those in the TE Standard Terms and Conditions of Sale and in no case will TE be liable for any incidental, indirect, or consequential damages arising from the sale, resale, use, or misuse of its products. 106 RoHS Compliant, ELV Compliant 2013_CP_S09-GDT.indd 106 HF Halogen Free 8/3/13 11:05 AM Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: TE Connectivity: GTCS35-900M-R05