PRODUCT: GTCx37
308 Constitution Drive
Menlo Park, CA 94025-1164
Phone: 800-227-4856
www.circuitprotection.com
Gas Discharge Tube
Three Electrode 7.5mm Diameter
Overvoltage Protection Device
Raychem Circuit Protection Products
DOCUMENT: SCD 25821
REV LETTER: D
REV DATE: MAY 25, 2007
PAGE NO.: 1 OF 6
Specification Status: Released
GENERAL DESCRIPTION
BENEFITS
•
•
•
•
Helps provide overvoltage fault protection against high energy surges
Suitable for sensitive equipment due to excellent impulse sparkover response
Suitable for high-frequency applications
Highly reliable performance
FEATURES
•
•
•
•
•
•
•
Crowbar device with low arc-voltage
Low capacitance and insertion loss
High accuracy spark-over voltages for high precision designs
Tested per ITU K.12 recommendations
Optional Fail-Short mechanism
Various lead configurations
Non-radioactive materials
APPLICATIONS
•
Telecommunications:
- MDF modules, xDSL equipment, RF system protection
•
Industrial Electronics and Consumer Electronics, such as
- Power Supplies, Surge Protectors, Alarm systems
SYMBOL
TYPICAL APPLICATION SCHEMATIC
PolySwitch
Devices
SiBar
Devices
PRODUCT: GTCx37
308 Constitution Drive
Menlo Park, CA 94025-1164
Phone: 800-227-4856
www.circuitprotection.com
Gas Discharge Tube
Three Electrode 7.5mm Diameter
Overvoltage Protection Device
Raychem Circuit Protection Products
DOCUMENT: SCD 25821
REV LETTER: D
REV DATE: MAY 25, 2007
PAGE NO.: 2 OF 6
PART NUMBERING
EXAMPLE:
GT C R 3 7 - 231 M - P 10 - FS
Series
GT : Gas Tube
Material
C : Ceramic
Type
R : Radial Leads
T : T Leads
Number of Electrodes
3 : Three
Diameter
7 : 7.5mm
Packaging
No Suffix: standard Tray packaging
-B: Bulk packaging (only upon special request)
with
Fail-Short
mechanism
Surge Rating
10 : 10kA (10 times 8 x 20μs)
Product Family
Voltage Tolerance
M : ± 20%
N : ± 25%
Voltage Designator
900 : 90 x 10^0 = 90V
151 : 15 x 10^1 = 150V
201 : 20 x 10^1 = 200V
231 : 23 x 10^1 = 230V
Etc..
DEVICE MARKING
EXAMPLE : GTCR37-231M-P10
23 P 10 GN
Week of Manufacture
Per Raychem Circuit Protection
lot number system :
E.g. G = First half of 2004; N = week 14
Surge Rating:
10 : 10kA
Product Family
Voltage Designator
23 : 230 V
Raychem Symbol
PRODUCT: GTCx37
308 Constitution Drive
Menlo Park, CA 94025-1164
Phone: 800-227-4856
www.circuitprotection.com
Gas Discharge Tube
Three Electrode 7.5mm Diameter
Overvoltage Protection Device
Raychem Circuit Protection Products
DOCUMENT: SCD 25821
REV LETTER: D
REV DATE: MAY 25, 2007
PAGE NO.: 3 OF 6
GENERAL CHARACTERISTICS
No Radioactive Materials
Storage temperature:
Devices without Fail-Short mechanism:
Devices with Fail-Short mechanism:
Operating temperature:
Devices without Fail-Short mechanism:
Devices with Fail-Short mechanism:
Body: Nickel Plated
Lead Material : Tin Plated
UL 497B Pending
-40°C … +90°C
-20°C … +65°C
-40°C … +90°C
-20°C … +65°C
A
E
B
DEVICE RATINGS AND CHARACTERISTICS
DC Sparkover
Voltage
(A-E) (B-E)
Part Number
@ 100V/s
Impulse Sparkover
Voltage
(A-E) (B-E)
@ 100V/μs
@ 1kV/μs
Insulation
Resistance
Capacitance
DC Holdover
Voltage
Impulse Life
(A+B-E)
10/1000μs,
400A
Impulse Discharge AC Discharge Current,
Current 8/20μs
50Hz
(A+B-E)
(A+B-E)
Repeat 10
times
Repeat 10
Single
Single Hit,
(5 times
times
Hit
9 Cycles
each
(1s interval)
polarity)
20kA
10kA
130A
10A
@ 100V
DC
@ 1MHz
Per ITU K.12
GTCR37-900M-P10
GTCR37-900M-P10-FS
GTCT37-900M-P10
GTCR37-151M-P10
GTCR37-151M-P10-FS
GTCT37-151M-P10
GTCR37-201N-P1
GTCR37-201N-P10-FS
GTCT37-201N-P10
GTCR37-231M-P10
GTCR37-231M-P10-FS
GTCT37-231M-P10
GTCR37-251M-P10
GTCR37-251M-P10-FS
GTCT37-251M-P10
GTCR37-261M-P10
GTCR37-261M-P10-FS
GTCT37-261M-P10
GTCR37-301M-P10
GTCR37-301M-P10-FS
GTCT37-301M-P10
GTCR37-351M-P10
GTCR37-351M-P10-FS
GTCT37-351M-P10
GTCR37-401M-P10
GTCR37-401M-P10-FS
GTCT37-401M-P10
GTCR37-551M-P10
GTCR37-551M-P10-FS
GTCT37-551M-P10
90V ± 20%
≤
700V
≤
850V
≥
10,000MΩ
1
≤
3.0pF
≤
52V
300 times
150V ± 20%
≤
700V
≤
850V
≥
10,000MΩ
1
≤
3.0pF
≤
52V
300 times
20kA
10kA
130A
10A
200V ± 25%
≤
500V
≤
650V
≥
10,000MΩ
≤
3.0pF
≤
135V
300 times
20kA
10kA
130A
10A
230V ± 20%
≤
500V
≤
650V
≥
10,000MΩ
≤
3.0pF
≤
135V
300 times
20kA
10kA
130A
10A
250V ± 20%
≤
500V
≤
650V
≥
10,000MΩ
≤
3.0pF
≤
135V
300 times
20kA
10kA
130A
10A
260V ± 20%
≤
500V
≤
650V
≥
10,000MΩ
≤
3.0pF
≤
135V
300 times
20kA
10kA
130A
10A
300V ± 20%
≤
600V
≤
750V
≥
10,000MΩ
≤
3.0pF
≤
135V
300 times
20kA
10kA
130A
10A
350V ± 20%
≤
600V
≤
750V
≥
10,000MΩ
≤
3.0pF
≤
150V
300 times
20kA
10kA
130A
10A
400V ± 20%
≤
700V
≤
850V
≥
10,000MΩ
≤
3.0pF
≤
150V
300 times
20kA
10kA
130A
10A
550V ± 20%
≤
850V
≤
1,000V
≥
10,000MΩ
≤
3.0pF
≤
150V
300 times
20kA
10kA
130A
10A
Note 1. Insulation Resistance measured at 50 V
DC
.
PRODUCT: GTCx37
308 Constitution Drive
Menlo Park, CA 94025-1164
Phone: 800-227-4856
www.circuitprotection.com
Gas Discharge Tube
Three Electrode 7.5mm Diameter
Overvoltage Protection Device
Raychem Circuit Protection Products
DOCUMENT: SCD 25821
REV LETTER: D
REV DATE: MAY 25, 2007
PAGE NO.: 4 OF 6
DIMENSIONS
Radial Leads, no Fail-Short mechanism
(GTCR37-xxxx-P10)
A
mm:
in*:
MIN
--
--
MAX
12.0
0.47
MIN
7.3
0.29
C
MAX
7.7
0.30
MIN
6.5
0.26
D
MAX
7.5
0.30
MIN
4.1
0.16
E
MAX
4.7
0.19
∅d
NOM
1.0
0.04
* Rounded off approximation
Radial Leads, with Fail-Short mechanism
(GTCR37-xxxx-P10-FS)
A
mm:
in*:
MIN
--
--
MAX
12.0
0.47
MIN
--
--
B
MAX
9.3
0.37
MIN
--
--
C
MAX
8.0
0.32
MIN
6.5
0.26
D
MAX
7.5
0.30
MIN
6.0
0.24
D1
MAX
--
--
MIN
4.1
0.16
E
MAX
4.7
0.19
∅d
NOM
1.0
0.04
* Rounded off approximation
PRODUCT: GTCx37
308 Constitution Drive
Menlo Park, CA 94025-1164
Phone: 800-227-4856
www.circuitprotection.com
Gas Discharge Tube
Three Electrode 7.5mm Diameter
Overvoltage Protection Device
Raychem Circuit Protection Products
DOCUMENT: SCD 25821
REV LETTER: D
REV DATE: MAY 25, 2007
PAGE NO.: 5 OF 6
T Leads, no Fail-Short mechanism
(GTCT37)
A
mm:
in*:
MIN
--
--
MAX
12.0
0.47
MIN
23.0
0.91
D
MAX
29.0
1.14
MIN
28.0
1.10
D1
MAX
32.0
1.26
∅d
NOM
1.0
0.04
* Rounded off
approximation
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