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Triggered Spark Gaps
Ceramic-Metal
PerkinElmer’s Triggered
Spark Gaps are a family of versatile
high voltage switches. They consist
of three electrodes in a hermetically
sealed, pressurized ceramic envelope. Triggered Spark Gaps are
generally characterized by a peak
current capability of thousands to
tens of thousands of amperes, delay
times of tens of nanoseconds, arc
resistance of tens of milliohms and
inductance of 5 to 30 nanohenries.
They are suitable for capacitor
switching applications such as flashlamps, electrically pumped gas
lasers, medical lithotripters, and
as crowbar protection devices.
Features
•
Fast switching operation
•
High voltage holdoff
•
Ceramic-metal construction
•
No warm up period
•
High current capability
•
Long life
EVERYTHING
IN A
NEW
LIGHT.
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page 2 PerkinElmer Optoelectronics
1. Optimum operating voltage is typically 60 to 80% of SBV.
2. Operation below minimum value may result in erratic firing
over time.
3. Operation at this value may result in self-firing over time.
4. Represents minimum main-gap breakdown voltage with no
trigger applied.
5. Value shown contains safety factor for end-of-life requirements.
6. PerkinElmer TM-11A Trigger Module can be used to trigger
all gaps.
7. Transformers listed vary mechanically and electrically. See
PerkinElmer Transformer Data Sheet.
8. These units must be operated in a liquid or gas dielectric to prevent
external flashover: GP-70 and GP-14B, above 24 kV; GP-32B and
GP-15B, above 35 kV; GP-74B and GP-81B, above 60 kV.
9. Designed for high altitude, high holdoff conditions.
10. Other voltage ranges and mechanical configurations are available
on request; for example, the GP-20B can be supplied with a 6 to
16 kV operating range by specifying GP-20B-20. The 20 would be
the SBV and E-E maximum would be 80% of SBV = 16kV.
11. E = Stored energy in joules (1/2CV
2
), lb = average current in
amperes, lp = RMS current in amperes, R = total circuit resistance
in ohms, P = average power in watts.
Notes
Trigger
Mode
C
C
A,C
A, C
A,B
A
A,B
A
A,B
A
A,B
A
A
Triggered Spark Gap Ratings
Simultaneous Ratings
Crowbar Service,
Typical Life:
5000-20,000 Shots
(11)
5 kA peak
0.1 coulomb
7.5 kA peak
0.2 coulomb
25 kA peak
0.4 coulomb
50 kA peak
0.5 coulomb
Peak currents up to 100
kA and charge transfer
up to 5 coulombs are
obtainable at reduced
life (100-1000 shots).
Simultaneous Ratings
Repetitive Switching
Typical Life:
1-5 Million Shots
(11)
3 millicoulombs/shot
lb = 35 mAdc
lp = 6 Aac
4 millicoulombs/shot
lb = 60 mAdc
lp = 8 Aac
4 millicoulombs/shot
lb = 100 mAdc
lp = 10 Aac
10 millicoulombs/shot
lb = 200 mAdc
lp = 15 Aac
At 70% SBV
100
30
30
30
30
30
At 40% SBV
1000
300
300
300
300
300
Recommended
PerkinElmer
Transformer
(6, 7)
TR-148A
TR-180B
TR-148A
TR-180B
TR-1795
TR-180B
TR1700
TR-1795
TR-1700
TR-1795
TR-1700
TR-1795
TR-1700
Typical Delay Time*
* when operated in mode A
(Nanoseconds)
PerkinElmer
Model
No.
GP-89
GP-90
GP-91
GP-93
GP-82B
GP-31B
GP-20B
GP-46B
GP-85
GP-86
GP-87
GP-70
GP-30B
GP-22B
GP-12B
GP-14B
GP-41B
GP-32B
GP-15B
GP-74B
GP-81B
(2)
0.7
1.3
4.4
8
0.4
2
3.5
8
2
6
10
12
2
6
10
12
12
20
25
40
40
(3)
2.1
3.4
10
20
1.6
6
11
20
6
15
24
36
6
15
24
36
36
48
60
100
100
SBV, kV
(4)
2.6
4.2
12.5
25
2
7.5
14
25
8
20
30
42(8)
7.5
19
30
42(8)
42
60(8)
86(8)
120(8)
120(9)
V
T
Min Trig
(kV Open
Circuit
(5)
10
10
20
20
20
20
O-A
Range, kV
Min/Max
(1,10)
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PerkinElmer Optoelectronics page 3
GP-20B, GP-31B, GP-46B, AND GP-82B
GP-70, GP-85, GP-86, AND GP-87
GP-12B, GP-14B, GP-15B, GP-22B, GP-30B,
GP-32B AND GP-41B
GP-74B and GP-81B
0.120 O.D. NOM
BLACK VINYL JACKET
7/30 TC CENTER
CONDUCTOR 10 ± 1 LONG
0.150
MAX
0.150 O.D. NOM
RED VINYL JACKET
7/30 TC CENTER
CONDUCTOR 10 ± 1 LONG
1.200
MAX
0.200
MAX
0.700
MAX
0.160
MAX
0.310
MAX
0.090 O.D. NOM
RED AND WHITE
TEFLON JACKET
19/34 TC CENTER
CONDUCTOR 10 ± 1 LONG
0.062 ± 0.020
0.050 DIA
THRU HOLE
0.250
0.062 ± 0.020
0.25
0.590
± 0.030
"T"
"A"
"O"
GP-89, GP-90, GP-91 AND GP-93
“A” = ADJACENT ELECTRODE, “O” = OPPOSITE ELECTRODE, “T” = TRIGGER PROBE
TYPE
GP-20B,31B AND 82B
GP-46B
A
MAX
1.187
1.550
TYPE
GP-12B, 14B, 22B AND 30B
GP-15B, 32B AND 41B
A
MAX
2.375
3.625
B
MAX
0.750
0.250
TYPE
GP-74B
GP-81B
A
MAX
3.625
4.500
B
MAX
0.250
RECESSED
MIN
CREEPAGE
PATH IN INCHES
4
6
Note: Dimensions in inches
All data and specifications subject to change without notice.
4 EQUALLY SPACED
MOUNTING HOLES
0.120 DIA
(EACH END)
0.185
0.215
1.020 DIA
MAX
45°
1.600 DIA
DIA
"A"
"O"
1.330 DIA B.C.
1.310
MAX
"T"
0.187
0.312
"A"
A
60° TYP
CLEARANCE FOR A
NO. 8 SCREW
6 HOLES EACH END
ON A 3.937 B.C.
A
3.000
± 0.050
DIA
"A"
CLEARANCE FOR A
90° ± 1°
NO. 8 SCREW
4 HOLES EACH END
ON A 2.575 B.C.
CERAMIC BODY
3.0
MAX
DIA
"O"
3.0 MAX
2.250
MAX
1.780
REF
2.000 ± 0.010 DIA
"A"
"A"
"T"
UNF THD
10-32
CLEARANCE FOR A
NO. 8 SCREW
B
60° TYP
6 HOLES EACH END
ON A 3.937 B.C.
A
0.500 REF
B
"A"
4.250
±0.025
DIA
0.4 REF
GLAZED CERAMIC
"O"
3.900
DIA MAX
"T"
UNF THD
"A"
10-32
4.250
± 0.025
DIA
"O"
GLAZED CERAMIC
"A"
"T"
10-32
UNF THD
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Triggered Spark Gaps Ceramic Metal
* All values are nominal; specifications subject to change without notice.
To request additional information, receive a quote, or place an order, please contact PerkinElmer Optoelectronics at office listed below.
PerkinElmer Optoelectronics
35 Congress Street
Salem, MA 01970
Toll Free: (800) 950-3441 (USA)
Phone: (978) 745-3200
Fax: (978) 745-0894
Copyright © PerkinElmer
All rights reserved
Printed in U.S.A. 10/00
PerkinElmer is a registered trademark of PerkinElmer, Inc.
www.perkinelmer.com/opto
Environmental Specifications
Ambient temperature range
Operating temperature range -54 to +100°C
Nonoperating temperature range -65 to +125°C
Vibration 15 to 500 Hz at 10 g maximum
Shock 50 g, 11 milliseconds
Thermal Shock -65 to +125°C
Mechanical Specifications
Envelope Ceramic-metal, hermetically sealed, exposed metal parts nickel plated.
Torque applied to studs 6 inch-pounds maximum.
Electrical Specifications
Electrode capacity Less than 5 pf.
Interelectrode resistance Greater than 10
10
ohms at 500 V.
Our Quality and Environmental Policy
“Our goal is to supply our customers
the agreed quantity of specified products and services,
defect free and on time while conducting business
in an environmentally responsible manner”
Marking
PerkinElmer’s trademark, part designation, and date code.
PerkinElmer welcomes inquiries about special types. We would be pleased to discuss the requirements
of your application and the feasibility of designing a type specifically suited to your needs.
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