According to the datasheet, this Triac can be used in a variety of applications: “Applications include the ON/OFF function in applications such as static relays, heating regulation, induction motor starting circuits, etc., or for phase control operation in light dimmers, motor speed controllers, and similar”.Ĭ3 and R6, R4 and C4 are snubbers. If you intend to control high power loads, don’t forget to mount a big heatsink or use a Fan to cool down the component. This high current rating allows us to easily reach 4000W dimming power, however, the temperature of the Triac must be kept low and as close to the room’s temperature. R1 is a pullup resistor that reduces the noise and allows us to capture all changes (both rising and falling edges). IC1 is an optocoupler that provides galvanic isolation. The zero-crossing points are quite essential for an AC dimmer. IC1, D1, and R2 are used to detect zero-crossing points.
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