The Siemens 3RV2011-1KA20-ZW97 is a SIRIUS motor-protection circuit breaker designed for motor branch circuits. It snaps onto a 35 mm DIN rail per DIN EN 60715 and uses spring-loaded terminals on the main circuit, so no screwdriver is needed for the power connections — a time-saver in panel builds. Trip Class 10 means it will open within 10 seconds at 7.2× the thermal setting, which is the standard for protecting standard induction motors during start-up. Phase-failure detection is built in, so a lost phase won't cook the winding. Breaking capacity hits 100 kA at 400 V and 42 kA at 500 V, so it can interrupt high fault currents without cascading to an upstream breaker. The continuous current rating at 480 V is 12.5 A, matching a 7.5 kW (10 hp) motor at 460/480 V.
Mounting and Clearances
Width is 45 mm, depth 97 mm, height 106 mm. It mounts in any position. Clearance requirements: 50 mm above and below, 30 mm to the sides, zero forwards and backwards — so it can sit flush against a back panel or a neighboring device. Wire range is 2 × 0.5 to 4 mm² solid or stranded, which covers most motor control wiring up to 4 mm². The spring terminals accept ferruled conductors cleanly.
Lifecycle and Sourcing
For a BOM line that needs a motor-protection CB with spring terminals and CLASS 10 trip, this is a direct fit. Sourced and quoted to order against an RFQ; availability and current pricing confirmed at quote time.