Originally Posted by
Kyle L.
The LUT-MLC is a shunt-capacitor. The need for this part arose when microprocessor based switches that did not require a neutral (Example: PD-5WS-DV) were first released. They are also used on switches/reverse phase dimmers that are exhibiting a "ghosting" behavior. Ghosting occurs you turn the dimmer or switch "off," the residual leakage current flowing through the device is high enough so that the LEDs produce some light. In those instances, by adding a LUT-MLC, this residual leakage current has an alternative path to flow through rather than the load itself, thereby eliminating the ghosting effect for digital and analog or night lighted switches and reverse phase controls only.