Home » Topic » Analog Circuits » MOC3021 MOC3021 FORWARD CHARACTERSTICS TEST CONDITIONS INPUT VOLTAGE =5V OUTPUT CONNECTED TO TRIAC BT136 SYMBOLS R -SERIES RESISTOR IN INPUT SIDE V – VOLTAGE ACROSS INPUT LED OF OPTO COUPLER I – INPUT CURRENT BY LED O/P – OUTPUT STATE OF LAMP LOAD OF 100W See alsoLCD -8051