The TRIAC’s ability to use only two leads instead of three makes it narrower than other AC switches – including the SCR – allowing multiple units to fit. What is TRIAC dimmer LED?Ī TRIAC is essentially three components in one package, namely an SCR, which can be gated directly by a small voltage signal, making it suitable for dimming. Instead of being turned on or off by a trigger pulse like SCRS, TRIACs turn on when the current is through. They have only two main pins – gate and cathode. TRIAC is a three-terminal semiconductor device used to control alternating currents, particularly in low voltage AC to DC power converters. TRIAC dimmers View All Accessories LED lighting accessories What does TRIAC dimmer mean? Heat sinks are required for devices that dissipate enough Power to cause excessive heating.īy adding an optocoupler between the TRIAC and the controller, the TRIAC is kept cool by high-frequency pulses it fails to conduct during regular operation. ![]() The lack of any need for an additional interface capacitor completes the advantages over SCR-based solutions.īecause TRIAC dimmers are semiconductor devices, they can be subject to problems from overheating and other thermal effects. ![]() TRIAC’s ability to switch a high current load with a low voltage control signal makes it ideal for controlling induction motors. 9 Are you looking for a new switch dimmer?
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