Gas Discharge Tubes
GTCX38-XXXM-R10 Series
Littelfuse Circuit Protection 8mm 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.
Benefits:
Helps provide overvoltage fault protection against
high energy surges
Suitable for high-frequency applications
Features:
3Pole, 8mm 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
- MDF modules, xDSL equipment, RF system
protection, antenna, base station
•
Industrial and consumer electronics, such as
- Surge protectors
- Alarm system
© 2016 Littelfuse,Inc.
Specifications are subject to change
xDSL equipment, RF sytem
MDF modules,
without notice.
Revised July 26,2016
Telecommunications
• Industrial and consumer electronics, such as
1
Protection, antenna, pase station
Document: SCD27381
Status: Released
Rev: D Date: JULY 26, 2016
GTCX35-XXX-R05 Series
GTCX38-XXXM-R10 Series
Device Voltage Ratings and Part Marking
Part Number
DC Sparkover
@100V/s
±20% Tolerance
(V)
GTCX38-750M-R10
GTCX38-900M-R10
GTCX38-141M-R10
GTCX38-151M-R10
GTCX38-201M-R10
GTCX38-231M-R10
GTCX38-251M-R10
GTCX38-261M-R10
GTCX38-301M-R10
GTCX38-351M-R10
GTCX38-401M-R10
GTCX38-421M-R10
GTCX38-471M-R10
GTCX38-501M-R10
GTCX38-551M-R10
GTCX38-601M-R10
75
90
140
150
200
230
250
260
300
350
400
420
470
500
550
600
Impulse
Sparkover
Gas Discharge Tubes
DC Holdover
Voltage
Per ITU K.12
(<150ms)
(V)
<52
<52
<80
<80
<135
<135
<135
<135
<150
<150
<150
<150
<150
<150
<150
<150
On-State Voltage
Nominal
(@ 1A)
(V)
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
@100 Vµs (V)
450
450
500
500
600
600
600
700
800
900
900
900
1050
1100
1300
1300
@1000 Vµs (V)
550
550
600
600
700
700
700
800
900
1000
1000
1000
1150
1200
1400
1400
Note:X options: S: Surface-mount; A: Axial-leaded; N: No-leaded
Device Surge Rating, Capacitance, Insulation Resistance, UL
Listing
Part Number
Impulse
Discharge
Current
8x20µs
10 hits
GTCX38-XXXM-R10
10kA
Impulse
Life
AC
Discharge
Current
(1sec duration;
10 hits)
@50 Hz
10Arms
Capacitance
Insulation
Resistance
UL
Rating
10x1000µs
300 hits
200A
@1Mhz
<1pF
@100V*
10,000 (MΩ)
UL497B
#E179610
All Devices
* Devices <=150V measured @ 50V.
Devices >= 500V measured @ 250V
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
2
Document: SCD27381
Status: Released
Rev: D Date: JULY 26, 2016
GTCX35-XXX-R05 Series
GTCX38-XXXM-R10 Series
Gas Discharge Tubes
Product Dimensions
DIMENSIONS = MILLIMETERS [INCHES]
Axial Leaded with- FS (GTCA38-XXXM-R10-FS2)
Axial Leaded with-FS (GTCA38-XXXM-R10-FS)
Axial Leaded with- FT (GTCA38-XXXM-R10-FT)
Axial Leaded (GTCA38-XXXM-R10)
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
3
Document: SCD27381
Status: Released
Rev: D Date: JULY 26, 2016
GTCX35-XXX-R05 Series
GTCX38-XXXM-R10 Series
Gas Discharge Tubes
Radial Leaded with- FT (GTCR38-XXXM-R10-FT)
Radial Leaded with-FS (GTCR38-XXXM-R10-FS2)
Radial Leaded with-FS (GTCR38-XXXM-R10-FS)
Radial Leaded (GTCR38-XXXM-R10)
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
4
Document: SCD27381
Status: Released
Rev: D Date: JULY 26, 2016
GTCX35-XXX-R05 Series
GTCX38-XXXM-R10 Series
No Leads with-FT (GTCN38-XXXM-R10-FT)
Gas Discharge Tubes
No Leads (GTCN38-XXXM-R10)
Surface-mount (GTCS38-XXXM-R10)
Pad Layout – Surface-mount Devices (GTCS38-XXXM-R10)
mm:
in*:
X
NOM
9.0
(0.354)
Y1
NOM
4.65
(0.183)
Y2
NOM
4.65
(0.183)
Z1
NOM
2.5
(0.098)
Z2
NOM
1.5
(0.059)
© 2016 Littelfuse,Inc.
Specifications are subject to change without notice.
Revised July 26,2016
5
Document: SCD27381
Status: Released
Rev: D Date: JULY 26, 2016
