Gas Discharge Tubes
GTCX28-XXXM-R20 Series
© 2016 Littelfuse,Inc. Document: SCD27622
Specifications are subject to change without notice Status: Released
Revised July 26,2016. All rights reserved. 1 Rev: D Date: JULY 26, 2016
Littelfuse Circuit Protection 8mm 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:
Helps provide overvoltage fault protection against
high energy surges
Suitable for high-frequency applications
Features:
2Pole, 8mm devices
Broad voltage range from 75V-350V
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: SCD27622
Specifications are subject to change without notice Status: Released
Revised July 26,2016. All rights reserved. 2 Rev: D Date: JULY 26, 2016
GTCX28-XXXM-R20 Series
Device Voltage Ratings and Part Marking
Device Surge Rating, Capacitance, Insulation Resistance, UL
Listing
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)
GTCX28-750M-R20
75
450
550
<52
20
GTCX28-900M-R20
90
450
550
<52
20
GTCX28-141M-R20
140
500
600
<80
20
GTCX28-151M-R20
150
500
600
<80
20
GTCX28-201M-R20
200
600
700
<135
20
GTCX28-231M-R20
230
600
700
<135
20
GTCX28-251M-R20
250
600
700
<135
20
GTCX28-261M-R20
260
700
800
<135
20
GTCX28-301M-R20
300
800
900
<150
20
GTCX28-351M-R20
350
900
1000
<150
20
Note:X options: S: Surface-mount; A: Axial-leaded; N: No-leaded
Part Marking : 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
GTCX28-XXXM-R20
20kA
100A
20Arms
<1.5pF
10,000 (MΩ)
All Devices
* Devices <=150V measured @ 50V;
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27622
Specifications are subject to change without notice Status: Released
Revised July 26,2016. All rights reserved. 3 Rev: D Date: JULY 26, 2016
GTCX28-XXXM-R20 Series
Product Dimensions
Pad Layout – Surface- mount Devices (GTCS28-XXXM-R20)
DIMENSIONS = MILLIMETERS [INCHES]
Surface-mount (GTCS28-XXXM-R20)
No Leads (GTCN28-XXXM-R20)
Axial Leads (GTCA28-XXXM-R20)
X
Y
Z
NOM
NOM
NOM
mm:
9.0
5.6
1.2
in*:
(0.354)
(0.220)
(0.047)
Gas Discharge Tubes
© 2016 Littelfuse,Inc. Document: SCD27622
Specifications are subject to change without notice Status: Released
Revised July 26,2016. All rights reserved. 4 Rev: D Date: JULY 26, 2016
GTCX28-XXXM-R20 Series
Packaging Information
Part Numbering System
General Characteristics
Part Description
Tray / Reel
Standard Package
No Leads: GTCN28-XXXM-R20
100pcs
2,000pcs
Axial Leads: GTCA28-XXXM-R20
100pcs
1,000pcs
Surface-mount: GTCS28-XXXM-R20
100pcs
2,000pcs
Tape & Reel SMD part: GTCS28-XXXM-R20-2
500pcs
4,000pcs
Example Part Number: GTCX28-231M-R20
GT =
Gas Tube
C =
Ceramic
X =
Lead Configuration: N= No leads; A= Axial Leads; S= Surface-mount
2 =
2 Electrode device
8 =
8mm Diameter
231 =
DC Spark Over Voltage of 230V (at 100V/s)
M =
Tolerance of 20% on DC Spark Over Voltage
R =
Product Family Designator
20 =
Surge rating: 8x20µs 20kA 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: SCD27622
Specifications are subject to change without notice Status: Released
Revised July 26,2016. All rights reserved. 5 Rev: D Date: JULY 26, 2016
GTCX28-XXXM-R20 Series
Part Marking Reference
Guide
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:
23 R20 GN
=
Manufacture Mark
23 =
Voltage Designator (23 = 230V)
R20 =
Product Family Designator + Surge Current 20kA (8x20µs 10 hits)
GN =
Year and Week of Manufacture