The Siemens SIRIUS 3RT6924-5AH01 is a replacement magnet coil for size S0 contactors rated up to 7.5 kW motor load. It operates on a 48 V AC control supply, drawing a typical apparent power of 7.6 VA during holding. The coil is wound for 50 Hz (holding range 0.8...1.1) and 60 Hz (0.85...1.1), meaning it reliably holds the contactor closed across a ±10% voltage band around nominal — important if your panel supply sags under heavy starting loads.
Termination is via screw terminals, matching the standard S0 contactor coil connections. The coil snaps onto the contactor armature without additional hardware; no rewiring of the main power circuit is needed. If you are swapping a failed coil on an existing S0 contactor, verify the existing coil voltage — this 48 V AC version will not work on a 24 V or 110 V coil base without changing the control transformer tap.