MIL-PRF-19500-431 Semiconductor Device, Field Effect Transistors, N-Channel, Silicon, Types 2N4091, 2N4092, 2N4093, 2N4091Ub, 2N4092Ub, And 2N4093Ub Jan, Jantx, And JantxvThis specification covers the performance requirements for N-channel, junction, silicon field-effect transistors intended for use in chopper and analog gate circuit applications. Three levels of product assurance are provided for each device type as specified in MIL-PRF-19500.