The MOC3023 is a high-sensitivity, non–zero-cross (random-phase) phototriac optocoupler, designed for interfacing low-voltage digital or analog control circuits with high-voltage AC loads.
Inside the IC, an infrared LED is optically coupled to a high-sensitivity phototriac, which is used to trigger a larger, external power triac.
Because it does not include zero-cross detection, it allows the triac to trigger at any point in the AC waveform, making it ideal for phase-angle control, dimming, and smooth variable power regulation.
Compared to MOC3020, MOC3021, and MOC3022, the MOC3023 has the highest sensitivity, requiring the lowest LED trigger current, making it suitable for microcontrollers with limited current drive (like ESP8266, ESP32, STM32, ATTINY, etc.)
Features:-
- Excellent IFT stability—IR emitting diode has low degradation
- High isolation voltage—minimum 5300 VAC RMS
- Underwriters Laboratory (UL) recognized—File #E90700
- Peak blocking voltage: 400V-MOC3023
- VDE recognized (File #94766)
Specification:-
| Symbol | Parameter | Value | Unit |
| IF | Forward current | 60 | mA |
| PD | Power dissipation | 100 | mW |
| VR | Reverse Voltage | 3 | V |
| Tstg | Storage temperature range | -40 to +150 | °C |
| TOPR | Operating Temperature | -40 to +85 | °C |
| TSOL | Lead Solder Temperature | 260 for 10 sec | °C |
| ITSM | Peak Repetitive Surge Current (PW = 1 ms, 120 pps) | 1 | A |
| VDRM | Off-State Output Terminal Voltage | 250 | V |
| VISO | Isolation Surge Voltage | 7500 | Vac(pk) |
Applications
- LED and incandescent light dimmers
- AC motor speed control (fans, small appliances)
- Heater and temperature regulation systems
- Household AC appliance switching
- Solid-state relays (SSR)
- Home automation systems
- Programmable AC power controllers
- Industrial AC load control
- Triac/thyristor triggering circuits
- Variable AC power supply systems
- Fan regulators and dimming modules
- HVAC and climate control systems
*Product image for illustration purposes only, actual product may vary.








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