The Allen-Bradley 500LC-100AA1 contactor is an AC-powered mechanically held lighting contactor. It is part of the Allen-Bradley Bulletin 500LC series which is a series of contactors based on a patented single solenoid bi-directional operating mechanism. The 500LC-100AA1 contactor is mechanically held and electrically operated with contacts which can be open or closed. The current rating of the Bulletin 500LC contactors is 20 Amps and the voltage rating is 600 Volts AC. The Bulletin 500LC contactors are rated for handling loads of various lighting-related substances including tungsten, quartz halogen, mercury vapor, and metal halide. Up to 12 poles are available on the 500LC contactors. The number of normally-open poles on the contactor are 10. The 500LC-100AA1 contactor is a Type 1 surface-mounted contactor. The coil voltage for the 500LC-100AA1 contactor is 110 to 120 Volts AC at 50 to 60 Hertz.

The construction of Bulletin 500LC contactors such as the 500LC-100AA1 contactor is compact, which enables it to be installed easily in panelboards. The electrical life of normally open lighting contactors is about 6,000 operations at a full load. The mechanical life of normally open lighting contactors is 50,000 operations. The inrush current rating at 120 Volts AC control voltage is 5 Amps RMS. The withstand current ratings at 250 Volts AC, 480 Volts AC, and 600 Volts AC service voltage are 22,000 Amps, 14,000 Amps, and 10,000 Amps, respectively. The maximum recommended breaker size at 250 Volts AC, 480 Volts AC, and 600 Volts AC service voltage is 30 Amps. The ambient operating temperature range for the control module on the 500LC-100AA1 contactor is from -40 to 140 degrees Fahrenheit.