Suppliers of commercial LED lighting and power solutions

What is TRIAC Dimming?

Dimmers have fast become a vital part of many lighting applications and installations. Dimmers allow you to set the level of light and save energy on the output and when teamed with an LED light source, this energy saving can be quite substantial.

Phase-cut dimmers are the most common dimming control and are often referred to as TRIAC dimmers. Creating the ideal configuration of LED lamps with the TRIAC dimmer has, in the past, been a challenge, but the introduction of new TRIAC dimming LED drivers has made this much simpler.

TRIAC dimming controls act as a high-speed switch and are used to control the amount of electrical energy passing to a bulb. A ‘trigger’ dictates what point the device starts to conduct the electricity, essentially “chopping up” the voltage waveform, stopping the voltage from being supplied at full load. The quicker the switch reacts the more power is let through and the later it reacts, the less power, resulting in a dimming of the bulb. This is very similar to more common Thyristor dimmers, however TRIAC dimming is less likely to produce “half wave” on failure or Hz flicker and therefore the lifespan of the LED’s are not as greatly reduced as they are with Thyristor dimmers.

When using a TRIAC dimmer with LED light solutions and sourcing a TRIAC dimming LED driver you need to ensure it is actually a TRIAC semiconductor device as TRIAC dimmers are designed for resistive loads, which LED solutions are not.

If the correct TRIAC dimming led driver is not sourced the lights will not perform as expected with the TRIAC wall dimmer; resulting in LED’s not dimming or creating a Hz flicker which will shorten the life of the LED’s.

Browse our selection of TRIAC Dimming power supplies below, or for more information or help on choosing the right dimmer for you, contact us on 0118 9823745.

May 7, 2018

what is the difference between TRIAC and Phase dimming?
is there any difference in how does it work?

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