MIL-PRF-19500/496F covers the performance requirements for two electrically isolated, unmatched PNP silicon transistors as one dual unit for HI-speed saturated switching applications. Four levels of product assurance are provided for each device type as specified in MIL-PRF-19500. Provisions for radiation hardness assurance (RHA) to two radiation levels is provided for JANTXV and JANS product assurance levels. RHA level designators?UIM?U?,?UID?U?,?UIP?UI,?UIL?U?,?UIR?U?,?UIF?U?,?UIG?U?and?UIH?U?are appended to the device prefix to identify devices, which have passed RHA requirements.