MIL-PRF-19500-504 Semiconductor Device, Transistor, Npn, Silicon, Power Darlington, Types 2N6283 And 2N6284, Jan, Jantx, And JantxvThis specification covers the performance requirements for NPN silicon power Darlington transistors. Three levels of product assurance are provided for each encapsulated device type as specified in MIL–PRF–19500.