MIL-PRF-19500-501 Semiconductor Device, Darlington Transistor, Pnp, Silicon, Power, Types 2N6051, And 2N6052, Jan, Jantx, And JantxvThis specification covers the performance requirements for PNP, Darlington, silicon, power transistors. Three levels of product assurance are provided for each device type as specified in MIL-PRF-19500.