Siemens CLMGL3C120 Lighting Contactor Latching Coil

Siemens CLMGL3C120 is a latching coil accessory for the CLM lighting contactor family, designed for 300–400 A devices in 2- to 3-pole configurations. The coil operates at 120 VAC and is used to latch the contactor in the closed position with a brief control pulse, while a separate unlatch coil (for example CLMGU3C120) is required to release the latch and reset the device. This arrangement allows the load to remain switched without continuous coil current, reducing control energy and simplifying wiring in lighting control applications. The CLMGL3C120 is part of Siemens’ CLM line and is intended to pair with CLM contactors in commercial and industrial lighting panels, motor control centers, and other high-current switching scenarios where reliable latch/unlatch action is essential. It supports 2-3 pole devices and aligns with CLM frame ratings for 300–400 A, ensuring compatibility with the heavier-duty CLM contactors used in demanding lighting and power applications. When selecting, verify that the voltage and pole count match the CLM base contactor and provide a compatible unlatch path via a CLMGU3C120 or equivalent unlatch coil variant.