本规范涵盖了在一个封装中包含一对电隔离匹配和非匹配NPN硅晶体管的单元化双晶体管的性能要求。按照MIL-PRF-19500的规定，每种设备类型都有四个级别的产品保证。RHA级别指示符“M”、“D”、“P”、“L”、“R”、“F”、“G”和“H”附加在设备前缀后，以识别已通过RHA要求的设备。

This specification covers the performance requirements for unitized, dual transistors which contains a pair of electrically isolated matched and unmatched NPN, silicon transistors in one package. Four levels of product assurance are provided for each device type as specified in MIL-PRF-19500. 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.