This specification covers the performance requirements for PNP, silicon, switching transistors, four independent chip array. Four levels of product assurance are provided for each device type as specified in MIL-PRF-19500. 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.