Motor protection circuit breaker, 1.25 A, CLASS 10 trip
The Siemens SIRIUS 3RV1021-0KA10-ZW96 is a 3-pole motor protection circuit breaker rated for 1.25 A continuous current, with a CLASS 10 trip characteristic and 100 kA breaking capacity across all common industrial voltages (240 V to 690 V AC). This is a standard feature on the SIRIUS 3RV2 line and saves adding a separate phase monitor relay. Panel integration is straightforward: 45 mm wide, 97 mm tall, 96 mm deep. The IP20 front face keeps fingers out of the live terminals.
RoHS compliance date is 01.05.2012, which covers the EU RoHS scope. The SIRIUS brand carries CE, UL, CSA, and IEC certifications typical for industrial control gear, though specific approval markings should be verified against the nameplate for the target jurisdiction.
Wiring & terminals
Accepts solid or stranded copper: 2x (1... 2.5 mm²) or 2x (2.5... 6 mm²) per clamp, or AWG 14–10 for the main contacts. Finely stranded wire with ferrule is also supported. No special tools beyond a standard screwdriver needed — field-serviceable without a crimper. Auxiliary switch expansion is possible (product extension auxiliary switch = Yes), so you can add a signal contact for remote status or PLC input without replacing the breaker.
Operating conditions
Shock rated at 25g for 11 ms. Maximum switching frequency is 15 operations per hour under AC-3 duty — fine for a pump or conveyor start/stop cycle, but not for rapid jogging. Power dissipation at rated current: 7.25 W total, 2.4 W per pole in hot operating state.