Motor protection circuit breaker, 10 A, 4 kW at 400 V
The Siemens SIRIUS 3RV1011-1JK10-0AA1 is a 3-pole motor protection circuit breaker rated for 10 A continuous current. At 400 V AC it handles motor loads up to 4 kW, with a breaking capacity of 50 kA at that voltage — enough to interrupt a bolted fault on most industrial distribution without upstream fuses. The overload release is thermal (bimetal), the short-circuit trip is magnetic — the standard combo for motor branch-circuit protection. Phase failure detection is built in, so it catches a lost phase before the motor cooks. No ground-fault detection on this variant. Screw-type terminals on both main and auxiliary circuits. Wire range accepts 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) — covers most motor feeder sizes up to 2.5 mm². AWG equivalent is 2x (18 to 14). Snaps onto 35 mm DIN rail per EN 50022, or can be screw-mounted. Front face is IP20 — protected against finger contact but not washdown. Mounting position is any orientation. Zero clearance needed at the sides or back for heat dissipation, which simplifies panel layout.
Breaking capacity and selectivity
This breaker's interrupting rating varies sharply with voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V. At 400 V — the common industrial motor voltage — 50 kA is high enough to coordinate with most downstream contactors and overloads without needing a current-limiting upstream device. At 690 V the 2 kA rating is low; if your panel sees high fault current at that voltage, this isn't the right breaker. Rated impulse withstand voltage is 6 kV, which covers typical surge environments in industrial control panels.
Lifecycle and sourcing
RoHS compliance date is 01/01/2013, meaning it meets the EU substance restrictions that took effect that year. No UL or CSA listing is stated in the evidence, but the part carries the Siemens SIRIUS brand and is designed to IEC/EN 60947 standards common in European-sourced panels.
Panel integration
Width is 45 mm — three 15 mm modules on a DIN rail, standard for a 3-pole motor-protective device. Depth is 81 mm, height 90 mm. Fits in a standard 200 mm deep enclosure with room for wiring ducts and contactors downstream. Power dissipation at rated current is 9.25 W total, 3.1 W per pole in hot operating state. That's moderate for a 10 A breaker — account for it in enclosure thermal calculations, especially if multiple units are ganged without spacing. An auxiliary switch can be added (product extension auxiliary switch is supported). This lets you wire a status feedback to a PLC or indicator light without an extra contactor block.