This specification covers the performance requirements for NPN silicon power Darlington, 2N6283 and 2N6284 transistors. Three levels of product assurance (JAN, JANTX and JANTXV) are provided for each encapsulated device as specified in MIL-PRF-19500/504. The device package outlines are as follows: TO-204AA (similar to TO-3) for all encapsulated device types.