The Siemens 3RT6926-5AG01 is a SIRIUS magnet coil designed for motor contactors in size S0, rated for switching motors up to 18.5 kW. It uses screw terminals for the coil connection. This is the replacement coil for the contactor body — if the contactor's coil burns out or the contactor itself is serviceable, you swap this coil rather than the whole assembly.
The coil mounts directly onto the S0 contactor frame — no adapter or bracket needed. If you are replacing a failed coil on an existing S0 contactor in the panel, this is the direct drop-in. No panel rewiring or re-termination of the main power circuit is required.