Siemens SENTRON 3VA2225-5HN42-0AF0 — 250 A MCCB, 4-Pole, Line Protection
The Siemens SENTRON 3VA2225-5HN42-0AF0 is a 4-pole molded case circuit breaker rated for 250 A continuous current, designed for line protection in distribution panels. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, giving you headroom for high-fault installations like transformer secondaries or large motor control centers where SCCR coordination matters. At 40 °C ambient it carries a full 250 A; derate to 241 A at 55 °C and 213 A at 70 °C. That 70 °C operating max matches the upper end of many non-climate-controlled industrial enclosures — useful if this breaker lives near a furnace line or inside a packed panel with limited airflow.
Interrupting Ratings and Selectivity
The 3VA2225-5HN42-0AF0 delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. That 121 kA at 415 V is the figure most European industrial panels will care about — it means this breaker can sit downstream of a large transformer without needing a current-limiting upstream device for most fault scenarios. Maximum power loss is 48 W, which factors into enclosure thermal calculations if you're stacking multiple breakers in a single cabinet.
Mounting and Integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — the 86 mm depth is the key fit dimension when sliding this into a fixed or withdrawable chassis on a DIN-rail or panel-mount base. It carries one auxiliary switch and one trip alarm switch (HQ design) for status feedback to a PLC or annunciator panel.