Motor-protection MCCB with ETU550M — what the ratings mean for fit
The Siemens 3VA2125-7MP36-0AA0 is a 3-pole IEC frame 160 molded case circuit breaker rated 25 A continuous, with an interrupting capacity of 110 kA at 415 V AC (breaking capacity class C). That 110 kA figure means it safely clears faults up to that level without cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers where the available short-circuit current is substantial. The ETU550M electronic trip unit provides LSI protection: long-time (Ir) adjustable 10–25 A for overload, short-time (Isd) 1.2–15x In for selective coordination, and instantaneous (Ii) 3–15x In for fast fault clearing. This makes the breaker suited for motor branch circuits where you need adjustable overload pickup to match the motor FLA and short-time delay to ride through starting inrush without nuisance trips. Part of the 3VA Molded Case Circuit Breakers up to 1600 A, IEC family, this unit uses terminal connections and is designed for panel or enclosure mounting in industrial switchgear. The frame 160 footprint is standard across the 3VA2 line, so panel cutouts and busbar connections are consistent if you need to uprate later.
Lifecycle and compliance — active, made-to-order
RoHS compliance is confirmed since 01-01-17. REACH Article 33 disclosure notes lead (CAS 7439-92-1) above 0.1% w/w in the candidate list. Export control is AL N / ECCN 9N9999 — no special licensing for most destinations.