What is the key feature of SCR/Triac dimmer technology?

The key feature of SCR (Silicon Controlled Rectifier) and Triac dimmer technology lies in its method of controlling the electrical power supplied to lighting fixtures. This technology functions by adjusting the phase of the AC waveform, effectively turning the current on at a specific point within the sine wave. By doing this, it regulates the amount of power delivered to the load without completely interrupting the flow.

When the current is turned on in the middle of the sine wave, it allows the dimmer to control brightness levels smoothly. This method is more efficient than simply cutting the current on and off, as it minimizes the electrical noise and flicker that can occur when the current is abruptly interrupted. Additionally, this technique leads to better compatibility with a range of lighting types, including incandescent and certain types of LED lights.

Understanding this function highlights why this approach is widely used in theatrical and architectural lighting applications, as it provides a versatile means of achieving variable brightness with minimal impact on the quality of light output.