Siemens SIRIUS shunt release 3RV1952-1EA0 is a remote-trip accessory sized for the 3RV13.5 motor-protective circuit breaker family. It operates on a 24...30 V AC/DC coil voltage, letting a PLC or safety relay command an immediate breaker trip without an operator at the panel.
The release snaps onto the left side of the 3RV13.5 breaker, occupying no additional DIN-rail width. It shares the breaker's screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715, so it integrates into the same panel footprint as the base breaker.
Coil tolerance on a 24 V nominal system: the release is rated for 24...30 V AC/DC. At the lower end, a 24 VDC control supply must hold above the dropout threshold of the shunt trip mechanism — verify your supply stays above 24 V under load if using a long cable run.