The ENW21542 is a replacement coil for the EasyPact NW range of air circuit breakers and switch-disconnectors — the MX shunt release, XF close coil, or MCH motor mechanism, depending on the specific breaker assembly. It is electrically operated with a maintained control signal, meaning the coil holds its state as long as the control voltage is present, rather than pulsing and latching.
Mounting mode is fixed — the coil bolts directly into the breaker mechanism housing, not onto a DIN rail. When swapping a failed coil in an existing EasyPact NW breaker, the fixed mount means the breaker must be racked out and the front cover removed to access the coil retention screws. No DIN-rail adapter or bracket is involved; the coil sits inside the breaker chassis.