The Siemens 3RV1011-1BA15 is a SIRIUS circuit breaker for motor protection, rated for 20... 690 V and carrying a CLASS 10 trip characteristic — meaning it will clear a stalled-rotor overload within 10 seconds at 7.2× Ie, standard for standard-duty induction motors up to about 0.13 hp at 230 V.
Breaking capacity hits 100 kA at 240 V, 400 V, and 500 V — that's enough to interrupt a bolted fault on a 200 kVA transformer secondary without upstream fuses needing to clear first. Clearance requirements: 20 mm above and below, 9 mm to the side, and zero forward or backward — so it can sit flush against a back panel or gland plate. Wire terminals accept 2× (0.5... 1.5 mm²) solid or stranded, or 2× (0.75... 2.5 mm²) — typical for control wiring up to 14 AWG. Main contact screws are M3.
Auxiliary contact ratings and trip class
The auxiliary contact block is rated 1 A at 24 V, 2 A at 110–125 V, 0.5 A at 230 V, and 0.15 A at 60 V — these are the make/break capacities for the internal switch, so it can drive a PLC input or a small relay directly at those voltages. Short-circuit protection for the main circuit requires upstream fuses: gL/gG 35 A at 400 V, 25 A at 500 V or 690 V.