Siemens Furnas Electric Co 3ZT1-916-1BB00 Varistor is a metal oxide varistor (MOV) surge suppressor designed to protect contactor coils from voltage spikes. It is rated for 24-48 VAC coil voltage and 24-70 VDC, enabling effective clamping of transients across common control circuits. Used as a surge-protection accessory on Siemens Furnas contactor assemblies, this MOV clamps inductive transients on the coil circuit to help prevent nuisance tripping and contact wear.
