ASSR-1420-302E 0.6 A Solid State Relay, PCB Mount, MOSFET, 60 V Maximum Load. The Avago Technologies’ Photo MOSFET Solid State Relay family consists of an infrared light-emitting diode (LED) and the detector which consists of a high-speed photovoltaic diode array and driver circuitry to switch on/off two discrete high voltage MOSFETs.