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Optocoupler IC
MOC3041 IC Zero Cross Optoisolator Triac Driver IC
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MOC3041 IC Zero Cross Optoisolator Triac Driver IC
The MOC3041 is a zero-crossing optoisolator triac driver designed for interfacing low-voltage control electronics with high-voltage AC loads. It integrates two major components inside a single 6-pin DIP package:
- An infrared (IR) LED on the input side
- A light-activated phototriac with zero-cross detector circuitry on the output side
When current flows through the LED, it emits infrared light; this light activates the internal phototriac, which in turn triggers an external triac connected to an AC load. The built-in zero-cross detection ensures that the output triac only triggers when the AC sine wave crosses the zero-voltage level. This reduces electrical stress and generates minimal EMI.
This makes the MOC3041 ideal for clean on/off switching of AC loads, especially in electronically sensitive environments.
Features:-
- Simplifies Logic Control of 115 Vac Power
- Zero Voltage Crossing
- dv/dt of 2000 V/µs Typical, 1000 V/µs Guara
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 | 400 | V |
| VISO | Isolation Surge Voltage | 7500 | Vac(pk) |
Applications
- AC Lamp Dimming (smooth on/off control)
(Though no phase control due to zero-cross switching; use MOC3021 series for dimming) - Household appliances switching loads (heaters, fans, pumps)
- Industrial AC load control
- Solid-State Relays (SSRs)
- Home automation systems
- Thyristor/triac-based on/off switching
- Low-noise switching applications
- Motor on/off control (not speed control)
- AC power controllers with low electrical interference
*Product image for illustration purposes only, actual product may vary.
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