280 Great Valley ParkwayMalvern, PA 19355-1308
Phone: 610-407-4700www.appliedpulsedpower.com
Model S61High Frequency Solid State Thyratron
Replacement
The Model S61 is a high voltage switch for high pulserepetition rate systems. It can be used to replace thyratronsas well as gas and vacuum triggered spark gap switches inhigh voltage applications such as modulators. This switchconsists of multiple series connected fast turn-off thyristorsspecifically designed for high di/dt, high voltage, pulsedpower applications. Snubber capacitance and resistivebalancing are included making it easier to use than aThyratron, such as E2V's CX1154L or a triggered sparkgap.
Operational Ratings (Tj=80ºC)
Peak Non-Repetitive Forward Current 14000 AmpsPeak Repetitive Forward Current 9000 AmpsPeak di/dt 10 kA/µSecMaximum RMS On-State Current 100 AmpsOperating Temperature Range 10 to 50 ºCPeak Rate of Reapplication of Off-State Voltage 1000 V/µSecPeak Pulse Repetition Rate 400 Hz
Typical Operational CharacteristicsTurn-On Delay (from external electrical trigger)1 <200 nSecTurn-On Delay Jitter <2 nSecTurn-Off Time <400 µSec
Typical Operational ConditionPulse Width 6 µSecPulse Frequency 400 HzForward Current 600 AmpsReverse Current 100 AmpsOperating Temperature 25 ºCCurrent Rise Time (10-90%) 250 nSecSwitching Efficiency 98 %
Model S61 High Frequency Solid State Thyratron Replacement Data SheetSpecifications as of June 2017
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280 Great Valley ParkwayMalvern, PA 19355-1308
Phone: 610-407-4700www.appliedpulsedpower.com
Part Number Selection GuidePart
NumberMaximum DCVoltage Rating
Peak Off-StateVoltage Rating
Off StateResistance
Capacitance On-StateResistance
CoolingCapability2
Switch Height(“H”)
S61-3 12kV 15kV 66MΩ 400pF 30mΩ 60W 4.2”
S61-4 16kV 20kV 88MΩ 300pF 40mΩ 80W 5.2”
S61-5 20kV 25kV 110MΩ 240pF 50mΩ 100W 6.2”
S61-6 24kV 30kV 132MΩ 200pF 60mΩ 120W 7.2”
S61-8 32kV 40kV 176MΩ 150pF 80mΩ 160W 9.2”
S61-10 40kV 50kV 220MΩ 120pF 100mΩ 200W 11.2”
S61-12 48kV 60kV 264MΩ 100pF 120mΩ 240W 13.2”
Figure 1: Switch Dimensions3
Model S61 High Frequency Solid State Thyratron Replacement Data SheetSpecifications as of March 2017
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280 Great Valley ParkwayMalvern, PA 19355-1308
Phone: 610-407-4700www.appliedpulsedpower.com
Notes: 1. Assumes TTL over BNC into 50Ω for trigger input. Other trigger circuit options for trigger input
and power are available, contact technical support for more details.2. Assuming at least 160LFM 25°C air flow over switch.3. For height dimension, H, see part number selection guide
S61 Options-H High Frequency, up to 2500Hz-F Fans Included
We recommend our EA0046 trigger circuit for this switch. Other trigger options are available.
Model S61S-841nF, 28ohm PFN, Operating at 500Hz
0
5000
10000
15000
20000
25000
-0.001 0 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009
Time (Seconds)
Sw
itc
h V
olt
ag
e (
Vo
lts
)
Model S61S-827nF, 30ohm PFN, Operating at 385Hz
0
5000
10000
15000
20000
25000
30000
35000
0.00E+00 1.00E-07 2.00E-07 3.00E-07 4.00E-07 5.00E-07 6.00E-07 7.00E-07
Time (Seconds)
Sw
itc
h V
olt
ag
e (
Vo
lts
)
0
100
200
300
400
500
600
700
Sw
itc
h C
urr
en
t (A
mp
s)
Switch Voltage Switch Current
Figure 2: Example Test Results for S61S-8
Model S61 High Frequency Solid State Thyratron Replacement Data SheetSpecifications as of June 2017
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