DC Solid State Relay Using Mosfet & Optically Isolated Gate Driver With Current Feedback & Fault Output

DC solid state Relay build using optically isolated Mosfet gate driver & high current Mosfet, this relay also provides current feedback as voltage output and fault TTL voltage output when  current goes above set point.  Current feedback designed around op-amp  as signal conditioning  which measure the current across low ohm shunt resistor.  On board preset (trimmer pot) to adjust the fault current set point.  Normally current fault output is high TTL it goes low if fault condition occurs.  Circuit available at www.twovolt.com


  • DC Supply 90V DC Maximum
  • Maximum Current Load 15Amps
  • Gate Driver Supply 15V DC