Gas Discharge Tubes
GTCX25-XXXM-R02 Series
© 2016 Littelfuse,Inc. Document: SCD27304
Specifications are subject to change without notice. Status: Released
Revised July 26,2016 1 Rev: B Date: JULY 26, 2016
Littelfuse Circuit Protection 5mm 2Pole GDTs
(ceramic gas discharge tubes), are commonly
used to help protect sensitive telecom equipment
such as communication lines, signal lines and data
transmission lines from damage caused by
transient surge voltages that typically result from
lightning strikes and equipment switching
operations.
Littelfuse Circuit Protection GDTs offer a high level
of surge protection, low capacitance and a broad
array of breakover voltage levels, making them
suitable for applications such as MDF (Main
Distribution Frame) modules, high data-rate
telecom applications (e.g. ADSL, VDSL), and
surge protection on power lines. Littelfuse Circuit
Protection GDTs, can help equipment meet the
most stringent regulatory standards.
Benefits:
Compact, small form factor suitable for efficient
assembly
Helps provide overvoltage fault protection against
high energy surges
Suitable for high-frequency applications
Features:
2Pole, 5mm devices
Broad voltage range from 75V-600V
Various form factors: surface mount, axial leads, no
leads
Low capacitance and insertion loss
UL 497B recognized
RoHS compliant
Devices tested per ITU K.12 recommendations
Non-radioactive materials
Applications:
Telecommunications • Industrial and consumer electronics, such as
- MDF modules, xDSL equipment, RF system - Surge protectors
protection, antenna, base station - Alarm system
Telecommunications • Industrial and consumer electronics, such as
MDF modules, xDSL equipment, RF sytem
Protection, antenna, pase station
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27304
Specifications are subject to change without notice. Status: Released
Revised July 26,2016 2 Rev: B Date: JULY 26, 2016
Device Surge Rating, Capacitance, Insulation Resistance, UL
Listing
GTCX25-XXXM-R02 Series
Part Number
DC Sparkover
Impulse
Sparkover
DC Holdover
Voltage
On-State Voltage
@100V/s
±20% Tolerance
(V)
@100 V/µs (V)
@1000 V/µs (V)
Per ITU K.12
(<150ms)
(V)
Nominal
(@ 1A)
(V)
GTCX25-750M-R02
75
450
550
<52
20
GTCX25-900M-R02
90
450
550
<52
20
GTCX25-141M-R02
140
500
600
<80
20
GTCX25-151M-R02
150
500
600
<80
20
GTCX25-201M-R02
200
600
700
<135
20
GTCX25-231M-R02
230
600
700
<135
20
GTCX25-251M-R02
250
600
700
<135
20
GTCX25-261M-R02
260
700
800
<135
20
GTCX25-301M-R02
300
800
900
<150
20
GTCX25-351M-R02
350
900
1000
<150
20
GTCX25-401M-R02
400
900
1000
<150
20
GTCX25-421M-R02
420
900
1000
<150
20
GTCX25-471M-R02
470
1050
1150
<150
20
GTCX25-501M-R02
500
1100
1200
<150
20
GTCX25-551M-R02
550
1300
1400
<150
20
GTCX25-601M-R02
600
1300
1400
<150
20
Note:X options: S: Surface-mount; A: Axial-leaded; N: No-leaded
PartMarking : XX = lot code
Part Number
Impulse
Discharge
Current
Impulse
Life
AC
Discharge
Current
(1sec duration;
10 hits)
Capacitance
Insulation
Resistance
UL
Rating
8x20µs
10 hits
10x1000µs
300 hits
@50 Hz
@1Mhz
@100V*
UL497B
#E179610
GTCX25-xxxM-R02
2.5kA
100A
2.5Arms
<1pF
10,000 (MΩ)
All Devices
Devices <=90V measured @ 50V
Devices >=500V measured @ 250V
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27304
Specifications are subject to change without notice. Status: Released
Revised July 26,2016 3 Rev: B Date: JULY 26, 2016
Product Dimensions
Pad Layout – Surface- mount Devices (GTCS25-XXXM-R02)
GTCX25-XXXM-R02 Series
DIMENSIONS = MILLIMETERS [INCHES]
Surface-mount (GTCS25-XXXM-R02)
No Leads (GTCN25-XXXM-R02)
Axial Leads (GTCA25-XXXM-R02)
X
Y
Z
NOM
NOM
NOM
mm:
6.0
3.9
1.3
in*:
(0.197)
(0.154)
(0.051)
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27304
Specifications are subject to change without notice. Status: Released
Revised July 26,2016 4 Rev: B Date: JULY 26, 2016
Packaging Information
Part Numbering System
General Characteristics
GTCX25-XXXM-R02 Series
GTCX25-XXXM-R02 Series
GTCX25-XXXM-R02 Series
Part Description
Tray / Reel
Standard Package
No Leads: GTCN25-XXXM-R02
200pcs
5,000pcs
Axial Leads: GTCA25-XXXM-R02
100pcs
1,000pcs
Surface-mount: GTCS25-XXXM-R02
1,500pcs (Reel)
12,000pcs
Example Part Number: GTCX25-351M-R02
GT =
Gas Tube
C =
Ceramic
X =
Lead Configuration: N= No leads; A= Axial Leads; S= Surface-mount
2 =
2 Electrode device
5 =
5mm Diameter
351 =
DC Spark Over Voltage of 350V (at 100V/s)
M =
Tolerance of 20% on DC Spark Over Voltage
R =
Product Family Designator
02 =
Surge rating: 8x20µs 2.5kA 10 times
No Radioactive Material
Storage Temperature: -40ºC to +90ºC
Operating Temperature: -40ºC to +90ºC
Body: Nickel Plated
Leads: Surface-mount, Axial Devices: Tin Plated
Devices with No Leads: Nickel Plated
Soldering Note: Devices with no leads are non-solderable; meant for insertion into magazine clips
m
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27304
Specifications are subject to change without notice. Status: Released
Revised July 26,2016 5 Rev: B Date: JULY 26, 2016
Part Marking Reference
Guide
GTCX25-XXXM-R02 Series
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.
Example Part Marking:
35 R02 GN
=
Manufacture Mark
35 =
Voltage Designator (35 = 350V)
R02 =
Product Family Designator + Surge Current 2.5kA (8x20µs 10 hits)
GN =
Year and Week of Manufacture