Optocoupler MOC3020 IC

The Optocoupler MOC3020 is a 6-pin triac driver optocoupler with an infrared LED on the input side and a light-activated photo-triac on the output side. It lets a microcontroller such as an Arduino or ESP32 trigger a power triac that switches AC loads, while keeping the low-voltage logic electrically isolated from the mains. As a random-phase (non zero-crossing) type, it can also be used for phase-control dimming.

Optocoupler MOC3020 Specifications

• Type: random-phase triac driver optocoupler, no zero-crossing circuit
• Package: 6-pin DIP
• Output peak blocking voltage: 400 V
• LED trigger current: 30 mA maximum (MOC3020 grade)
• Input: infrared LED, about 1.2 V forward voltage
• Isolation: optical, between the LED and the output

Optocoupler MOC3020 Applications

• Driving triacs such as the BT136 or BTA16 to switch AC lamps, heaters and fans
• Phase-control light dimmers and AC motor speed control
• DIY solid-state relays controlled by Arduino or ESP32
• Isolating logic circuits from mains-powered loads
• Power electronics labs

What's in the Box

• 1 × MOC3020 optocoupler IC

Tip: The MOC3020 can need up to 30 mA through its LED (pins 1 and 2) to trigger reliably, more than an Arduino pin should supply, so drive it through a small transistor and a current-limiting resistor. It is designed for 115 V AC lines; for 230 V mains a 600 V type such as the MOC3052 gives more margin.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.