Schneider Electric’s Square D 1861-S1-R36A magnetic coil is a replacement coil for the 1861-S1 family of motor-control relays and contactors, designed for 440–480 VAC operation at 50/60 Hz. Commonly used to energize 1861-S1 devices in motor-control circuits and timer assemblies within Square D control panels. Distributors note the coil has been discontinued by the manufacturer.
