Cutler-Hammer C306KN3SER.A1 is an industrial magnetic contactor relay used to remotely switch electrical loads in control circuits. The model designation C306KN3SER.A1 identifies the exact Cutler-Hammer catalog entry for this device. In industrial automation and control panels, magnetic contactors provide on/off control of connected equipment by energizing or de-energizing the main power path when driven by a control circuit.
