MIL-PRF-19500-433 Semiconductor Device, Transistor, Pnp, Silicon, High-Power, Type 2N4399 And 2N5745, Jan, Jantx, Jantxv, And JansThis specification covers the performance requirements for PNP silicon, high-power transistors. Four levels of product assurance are provided for each device type as specified in MIL-PRF-19500.