TA2.0 High Energy Devices, LLC, TA2.0 Datasheet - Page 4

• Manufacturer Part Number: TA2.0
• Description: Triggered Spark Gaps
• Manufacturer: High Energy Devices, LLC

TA/TB/TG221-226 Series
Specifications (@25
(1)
(2)
(3)
(4)
Device Specifications
Life Ratings
Main Static
Breakdown Voltage
Applied Voltage
Dimension A
Dimension B
Peak Current
Discharge Life
Pulse Energy
Cumulative Charge
Parameter
The trigger voltages given in these tables are the minimum triggering voltages necessary for triggering at the corresponding
applied voltage limits. As the applied voltage increases, the trigger voltage required for triggering decreases. It is assumed
that the trigger is applied across the trigger and adjacent main electrodes — higher trigger voltages are required if it is
applied across the trigger and opposite main electrodes.
End point for life testing is a 20% reduction in the main static breakdown voltage.
Because the main static breakdown voltage of these devices is adjustable, the trigger voltage required for any particular
applied voltage cannot be specified. High Energy Devices suggests setting the main static breakdown voltage to at
least 115% of the maximum applied voltage.
The lifetime of the triggered gap can be approximated in terms of the cumulative charge, in coulombs (Q), that can be
passed through the device without changing its main static breakdown voltage by more then 20 percent. Expressing the
height of the current pulse in amperes and the duration in seconds, the area under the pulse is the coulomb of charge
contained in it.
Example 1:
Approximating the pulse shape by a triangle, the charge contained in the pulse is:
q = 20,000 amps x 10
If the Coulomb Rating (Q) is given as 100 coulombs, the life under these conditions is approximately:
Life = Q/q = 100/0.2 = 500 discharges
Example 2:
stored in the capacitor is:
q = CV = 2.0 x 10
q = 0.016 coulombs
If the Coulomb Rating (Q) is given as 100 coulombs, the life under these conditions is approximately:
Life = Q/q = 100/0.016 = 6250 discharges
(3)
(4)
Pulse Energy (as shown)
A triggered gap is required to pass a 20,000 peak amp pulse having a 10
A 10kV main static breakdown triggered gap must dump a 2.0
-6
0
Coulomb Rating
C)
farads x 8,000 Volts
Conditions
-5
PW=30µs
100V/s
5,000A
sec = 0.2 coulombs
Symbol
E
E
www.highenergydevices.com
-
-
-
-
-
-
bb
Z
1,000
6,000
Min
18.0
15.0
50
-
-
-
TG225
Nom
3.50
375
-
-
-
-
-
-
Max
40.0
35.0
8.0
µ
-
-
-
-
-
F capacitor charged to 8kV. The charge
1,000
6,000
Min
35.0
30.0
50
-
-
-
µ
s pulse half-width.
TG226
Nom
4.50
166
-
-
-
-
-
-
Max
60.0
55.0
9.0
-
-
-
-
-
Units
inches
inches
shots
kV
kV
kA
Q
J
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