This specification covers the performance requirements for NPN silicon, power 2N3996 through 2N3999 transistors for use in high-speed power switching applications. Four levels of product assurance (JAN, JANTX, JANTXV and JANS) are provided for each encapsulated device as specified in MIL-PRF-19500/374. Two levels of product assurance (JANHC and JANKC) are provided for the unencapsulated die.