MIL-PRF-19500-547 Semiconductor Device, Field Effect Transistor, N-Channel, Silicon, Types 2N6660 And 2N6661, Jan, Jantx, Jantxv, And JansThis specification covers the performance requirements for a N-channel, enhancement-mode, low-threshold logic level, high frequency, high switching speed MOSFET, power transistor. Four levels of product assurance are provided for each encapsulated device type as specified in MIL-PRF-19500.