What this part is and what it fits
The Siemens SIRIUS 3RT1924-5AP62 is a replacement magnet coil for Size S0 contactors in the SIRIUS family, with a spring-type terminal connection. It is designed for AC control supply voltage, rated at 220 V at 50 Hz and 240 V at 60 Hz, with an operating range of 0.8 to 1.1 times the rated voltage — meaning the coil will reliably pick up and hold as long as the control voltage stays within that band. This is the coil you swap when the original contactor coil fails open or shorted, or when you need to change the control voltage on an existing S0 contactor in the panel.
What the ratings mean for fit
The 0.8 to 1.1 operating range at 50 Hz is the voltage tolerance window the coil guarantees to pick up and seal in. At 220 V nominal, that means the coil must see between 176 V and 242 V to operate reliably. If your control transformer or line voltage sags below that under load, the coil may chatter or drop out — a common failure mode on marginal control circuits. The spring-type terminal accepts solid or ferruled stranded conductors typical for control wiring in a DIN-rail enclosure.