Development of a hybrid microelectronics solid state relay for 2500 volts isolation and -120° C to 80° C thermal cycling range

A hybrid microelectronics solid state relay was developed in a TO-116 package for the MINX project. The relay provides 2500 V_dc input to output isolation and operated from a MHTL logic signal to switch a load of 400 V_dc at 2 mA. The relay is designed to operate in space and survive 1000 thermal cycles of -120° C to 80° C. The use of X-rays for failure analysis in small hybrid circuits proved valuable and the applications of vacuum deposited Parylene¹ as a dielectric coating proved extremely valuable.