This specification covers the performance requirements for NPN silicon, low-power , 2N720A, 2N1893 and 2N1893S transistors. Four levels of product assurance (JAN, JANTX, JANTXV and JANS) are provided for each device type as specified in MIL-PRF-19500/182, two levels of product assurance are provided for die (JANHC and JANKC). Radiation hardness assurance (RHA) level designators “M”, “D”, “P“, “L”, “R”, “F’, “G”, and “H” are appended to the device prefix to identify devices which have passed RHA requirements.