It is a replacement coil for the 3RT2 series contactors — not a standalone contactor, but the interchangeable coil assembly that lets you swap the actuation voltage without replacing the whole contactor block. The coil's operating range is 0.8 to 1.1 times the rated voltage at 50 Hz, meaning it picks up and holds reliably between roughly 184 V and 253 V on a 230 V nominal line. That's a standard tolerance for AC-operated contactor coils in industrial control panels.
Lifecycle reality — phased out, successor known
This part is flagged as a phased-out product. The official successor is the SIRIUS 3RT2 series coil. If you are maintaining an existing panel that uses the 3RT1935-5AP01, the coil itself is still serviceable through independent distribution, but new designs or BOM revisions should migrate to the 3RT2-series equivalent.
Fit and integration — what swaps in and what does not
The coil is AC-operated only.