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MIL-PRF-19500-603 Semiconductor Device, Field Effect Radiation Hardened \(Total Dose Only\) Transistors, N-Channel, Silicon, Types 2N7268, 2N7269, 2N7270, 2N7394, 2N7268U, 2N7269U, 2N7270U, And 2N7394U, Jantxvr, F, G, H; Jansr, F, G, And HThis specification covers the performance requirements for an N-channel, enhancement-mode, MOSFET, radiation hardened \(total dose only\), power. Two levels of product assurance are provided for each device type specified in MIL-PRF-19500, with avalanche energy maximum rating \(EAS\) and maximum avalanche current \(IAS\). See 6.5 for JANHC and JANKC die versions.

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MIL-PRF-19500/603J
4.3.1 Gate stress test. Apply VGS = 30 V minimum for t = 250 µs minimum.
4.3.2 Single pulse avalanche energy EAS.
a.
Peak current (IAS) ...................................................... IAS(max).
b.
Peak gate voltage (VGS) ............................................. 12 V.
Gate to source resistor (RGS) ..................................... 25Ω ≤ RGS ≤ 200Ω.
c.
Initial case temperature (TC) ...................................... +25°C +10°C, -5°C.
d.
Inductance (L) ............................................................. L = (2*EAS/(ID1)2)*((VBR-VDD)/VBR) mH minimum.
e.
f.
Number of pulses to be applied ................................... 1 pulse minimum.
g.
Supply voltage (VDD) ................................................. 25 V for 2N7268, 2N7394, and 2N7268U; 50 V for
2N7269, 2N7269U, and 2N7270.
4.3.3 Thermal impedance. The thermal impedance measurements shall be performed in accordance with method
3161 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, tSW, (and VH where appropriate).
Measurement delay time (tMD) = 70 µs max. See table III, group E, subgroup 4 herein.
*
4.3.4 Dielectric withstanding voltage.
a.
Magnitude of test voltage.......................................900 V dc.
b.
Duration of application of test voltage.......................15 seconds (min).
c.
Points of application of test voltage...........................All leads to case (bunch connection).
d.
Method of connection.............................................Mechanical.
e.
Kilovolt-ampere rating of high voltage source..............1,200V /1.0 mA (min).
f.
Maximum leakage current........................................1.0 mA.
g.
Voltage ramp up time..............................................500V /second.
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as
specified herein.
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with appendix E, table V of
MIL-PRF-19500 and table I herein. End-point electrical measurements shall be in accordance with table I, subgroup
2 herein.
4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table VIA (JANS) and table VIB (JANTXV) of MIL-PRF-19500, and herein. Electrical
measurements (end-points) shall be in accordance with table I, subgroup 2 herein.
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