GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 1 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 Series
Benefits:
Compact, small form factor suitable for efficient
assembly
Helps provide overvoltage fault protection against
high energy surges
Suitable for high-frequency applications
Features:
3Pole, 5mm devices
Broad voltage range from 75V-600V
Various form factors: surface-mount, leaded, no
leads
Optional fail-short mechanism on some devices
Low capacitance and insertion loss
Crowbar overvoltage protection
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
Littelfuse Circuit Protection 5mm 3Pole 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.
GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 2 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 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 Vµs (V)
@1000 Vµs (V)
Per ITU K.12
(<150ms)
(V)
Nominal
(@ 1A)
(V)
GTCX35-750M-R05
75
450
550
<52
20
GTCX35-900M-R05
90
450
550
<52
20
GTCX35-141M-R05
140
500
600
<80
20
GTCX35-151M-R05
150
500
600
<80
20
GTCX35-201M-R05
200
600
700
<135
20
GTCX35-231M-R05
230
600
700
<135
20
GTCX35-251M-R05
250
600
700
<135
20
GTCX35-261M-R05
260
700
800
<135
20
GTCX35-301M-R05
300
800
900
<150
20
GTCX35-351M-R05
350
900
1000
<150
20
GTCX35-401M-R05
400
900
1000
<150
20
GTCX35-421M-R05
420
900
1000
<150
20
GTCX35-471M-R05
470
1050
1150
<150
20
GTCX35-501M-R05
500
1100
1200
<150
20
GTCX35-551M-R05
550
1300
1400
<150
20
GTCX35-601M-R05
600
1300
1400
<150
20
Note:X options: S: Surface-mount; A: Axial-leaded; N: No-leaded
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
GTCx35-xxxM-R05
5kA
100A
5Arms
<1pF
10,000 (MΩ)
All Devices
* Devices <=150V measured @ 50V
Devices >= 500V measured @ 250V
GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 3 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 Series
Product Dimensions
DIMENSIONS = MILLIMETERS [INCHES]
No Leads with –FT (GTCN35-XXXM-R05-FT)
No Leads (GTCN35XXM-R05)
Axial Leaded (GTCA35-XXXM-R05-FT)
Axial Leaded (GTCA35-XXXM-R05)
Surface-mount (GTCS35-XXXM-R05)
“T” Leaded (GTCT35-XXXM-R05)
GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 4 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 Series
Pad Layout – Surface-mount Devices
General Characteristics
Packaging Information
Materials Information
RoHS Compliant ELV Compliant
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)
No Radioactive Material
Storage Temperature: -40ºC to +90ºC
Operating Temperature: -40ºC to +90ºC
Body: Nickel Plated
Leads: Surface-mount, “T” and Axial Devices: Tin Plated
Devices with no leads: Nickel Plated
Soldering Notes: Devices with no leads: non-solderable; suitable for insertion into a magazine clip
Part Description
Tray / Reel
Standard Package
No Leaded: GTCN35-XXXM-R05
100 pcs (Tray)
2,500 pcs
With Leads: GTCA35-XXXM-R05/GTCT35-XXXM-R05
100 pcs (Tray)
1,000 pcs
Surface-mount (T&R): GTCS35-XXXM-R05-2
1,000 pcs (Reel)
8,000 pcs
GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 5 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 Series
Part Numbering System
Example Part Number: GTCX35-351M-R05-FT
GT =
Gas Tube
C =
Ceramic
X =
Lead Configuration: N= No leads; A= Axial Leads; S= Surface-mount; T= T Configuration Leads
3 =
3 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
05 =
Surge rating: 8x20µs 5kA 10 times
FT =
With Fail-Short mechanism
-2
Tape and Reel
GTCX35-XXX-R05 Series
Gas Discharge Tubes
© 2016 Littelfuse,Inc. DOCUMENT: SCD27305
Specifications are subject to change without notice. STATUS: RELEASED
Revised July 26,2016 6 REV: G DATE: JULY 26, 2016
GTCX35-XXXM-R05 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:
35 R05 GN
=
Manufacturer’s Mark
35 =
Voltage Designator (35 = 350V)
R05 =
Product Family Designator + Surge Current 5kA (8x20µs 10 hits)
GN =
Year and Week of Manufacture
