Optoelectronics, optical switch, infrared emitter and detector, Opto Isolation - tatanh1983/conchodom GitHub Wiki 4-PIN MFP, 600V ZERO CROSSING TRIAC OUTPUT https://www.futureelectronics.com/p/semiconductors--optoelectronics--isolation-components-optocouplers/fodm3063r2-onsemi-3327624