MIL-PRF-19500-421 Semiconductor Device, Dual Transistor, Unitized, Npn/Pnp, Complementary, Silicon, Types 2N3838, 2N4854, And 2N4854U, Jan, Jantx, And JantxvThis specification covers the performance requirements for unitized, dual transistors which contain a pair of electrically isolated complementary NPN and PNP silicon triode transistors in one package. Three levels of product assurance are provided for each device type as specified in MIL-PRF-19500.