MIL-PRF-19500-488 Semiconductor Device, Transistor, Npn, Silicon, High-Power, Types 2N5671 And 2N5672, Jan, Jantx, Jantxv, And JansThis specification covers the performance requirements for NPN, silicon, high-power transistors. Four levels of product assurance are provided for each device type as specified in MIL-PRF-19500.