MIL-PRF-19500-439 Semiconductor Device, Transistor, Npn, Silicon, High-Power, Types 2N5038 And 2N5039, Jan, Jantx, Jantxv, Jans, Janhc, And JankcThis specification covers the performance requirements for NPN silicon, high-power transistors for use in high-speed power-switching applications. Four levels of product assurance are provided for each encapsulated device type as specified in MIL-PRF-19500, and two levels of product assurance are provided for each unencapsulated device type.