Coil voltage and contactor fit
The S-N125-COIL AC500V is a 500V AC replacement coil designed for the Mitsubishi S-N125 contactor. The coil voltage is the primary selection parameter — match it to the control circuit feeding the contactor. A 500V AC coil on a 480V line sits within the typical operating tolerance, but verify the control transformer taps if the line runs at 400V.