MOC3081 Triac Driver Optocoupler IC

The MOC3081 is a non–zero-cross (random-phase) triac driver optocoupler designed to safely interface low-voltage control circuitry with high-voltage AC loads.
It includes an infrared LED on the input side and a light-sensitive phototriac on the output side, providing strong galvanic isolation between the control and AC mains.

Because it does not include zero-cross detection, the MOC3081 can trigger a triac at any point in the AC waveform. This makes it ideal for:

AC light dimming
Motor speed control
Phase-angle power regulation

The MOC3081 belongs to the MOC308x series, where it has higher LED trigger current compared to MOC3082 and MOC3083.

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Features

Random phase (non–zero-cross) switching
Suitable for phase-angle control (dimming, speed control)
High input-to-output isolation (up to 7500V peak)
Low input-output capacitance
High noise immunity
Compatible with microcontrollers & logic outputs
Internal phototriac for triggering external triacs
Standard 6-pin DIP package

Specification:-

Symbol	Parameter	Value	Unit
IF	Forward current	60	mA
PD	Power dissipation	120	mW
VR	Reverse Voltage	6	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	800	V