Motor protection circuit breaker, 4 A, Class 10
The Siemens SIRIUS 3RV1011-1EA20 is a motor protection circuit breaker rated for a continuous current of 4 A with a CLASS 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× rated current — fast enough to protect standard induction motors during a stall or locked-rotor condition without nuisance tripping on normal starting inrush. Breaking capacity reaches 100 kA at both 240 V and 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V — so on a 400 V line this breaker handles fault currents large enough to sit downstream of most distribution transformers without needing a current-limiting upstream device.
Spring-loaded terminals on both main and auxiliary circuits accept 2x (0.25... 2.5 mm²) solid or 2x (0.25... 1.5 mm²) finely stranded with ferrule. IP20 finger-safe protection on the front face; suitable for enclosed panel use where operators might reach in during maintenance.
RoHS compliance date marked as 01.01.2013 — the part meets the EU RoHS directive effective from that date. Surge voltage resistance rated at 6 000 V, which covers the impulse withstand for industrial control panels per IEC 60947.