The Siemens SIRIUS 3RV2011-1KA25-ZW96 is a motor protection circuit breaker in the S00 frame, rated 12.5 A operational current with a Class 10 trip curve — meaning it opens within 10 seconds at 7.2× the thermal setting, which is the standard match for standard-capability squirrel-cage motors during a locked-rotor event. The instantaneous short-circuit trip fires at 163 A, so it clears a bolted fault before the contactor or cable sees damage. Breaking capacity sits at 100 kA at 240 V and 400 V AC, dropping to 42 kA at 500 V and 6 kA at 690 V AC. That 100 kA at 400 V is the number that matters for most 400 V distribution panels — it means this breaker can sit downstream of a transformer with a high fault-current potential without needing a current-limiting upstream device in most configurations.
Sourcing and lifecycle
The spring-type terminals accept solid or ferruled stranded conductors and ship with a built-in auxiliary contact block (1 NO + 1 NC) for status feedback to a PLC or motor starter interlock — no separate aux kit to order for basic on/off signaling. Substance prohibitance date of 10/01/2009 indicates RoHS compliance per Siemens declaration; the part meets the EU RoHS directive effective from that date.
Integration notes
Snap-on mounting onto 35 mm DIN rail per DIN EN 60715, size S00 footprint — 45 mm wide, 90 mm tall, 75 mm deep. The spring terminals accept 2×(0.5…1.5 mm²) or 2×(0.75…2.5 mm²) solid/stranded, so it fits standard motor control center wiring without ferrule changes. Rated operating voltage range 20…690 V AC covers 400 V and 480 V industrial supplies as well as 690 V mining or marine systems. The 100 kA SCCR at 400 V means it can be used in high-fault panels without series-rated fusing, simplifying coordination studies.