The Siemens 3RV1031-4BA10-ZW95 is a size S2 motor protection circuit breaker from the SIRIUS 3RV1 family, rated Class 10 with an adjustable thermal overload release from 14 to 20 A and a fixed magnetic short-circuit release of 260 A. It uses screw terminals and standard switching capacity — sized for a typical 3-phase motor in that current band, like a 5.5 kW unit at 400 V.
The 14-20 A adjustable thermal range covers motors drawing around 14-20 A full-load; set it to the motor nameplate FLA. The 260 A magnetic short-circuit release is fixed and non-adjustable — it handles hard faults above that threshold. Screw terminals are conventional for panel wiring; the S2 frame size fits standard DIN-rail mounting in a motor control center.
Deployment Context
Snap-on DIN-rail mount for panel integration. The S2 frame is common in Siemens motor feeder panels and standalone starter assemblies. Multi-unit packaging (24 per pack) suggests this was originally intended for volume builds or spares kits.