The Siemens 3RV2011-0HA25-ZX95 is a SIRIUS motor protection circuit breaker in size S00, rated for 0.8 A operational current with a Class 10 trip curve — that means it's built to protect small motor loads (like fractional-horsepower pumps or fans) from overload and short circuits, tripping fast enough to keep the motor windings from cooking during a stall or jam. The instantaneous short-circuit release is set at 10 A, and the breaker delivers a full 100 kA breaking capacity across the board — 240 V, 400 V, 500 V, and 690 V AC — so it can handle a dead short on a high-fault panel without needing an upstream fuse to back it up. It's fitted with spring-type terminals for the main circuit and includes transverse auxiliary switches (1 NO + 1 NC), which is handy for signaling the breaker's status back to a PLC or annunciator without adding a separate contact block.
Panel Fit and Wiring
The S00 frame snaps onto a 35 mm DIN rail (DIN EN 60715) and occupies 45 mm of width — standard for a three-pole motor-protection breaker in this class, so it slides into a populated panel without surprises. Spring-type terminals accept solid or stranded wire up to 4 mm² (or 2x 2.5 mm² with ferrules), and the screwdriver shaft for the auxiliary terminals is a 3 mm tip — nothing exotic, just a standard slot driver.