The Siemens 3VA2325-5MN32-0DF0 is a SENTRON molded case circuit breaker (MCCB) designed for motor protection, rated at 250 A continuous at 40 °C across the full 3-pole set — no derating needed up to 70 °C, which simplifies panel layout in warm enclosures. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — high enough for most industrial fault-current scenarios, though the 690 V figure means it is not a primary choice for 690 V mains without careful coordination study. This breaker includes an undervoltage release (UVR) and one auxiliary switch plus one trip alarm switch HQ, plus phase failure detection — it drops the load on loss of phase or undervoltage, which is standard for motor protection circuits that need to prevent single-phasing. Power loss is 40 W maximum at rated current — modest for a 250 A frame, but worth accounting for in a sealed panel with other heat sources.
Integration and Mounting
The breaker measures 110 mm deep, 138 mm wide, and 248 mm high — a standard 3-pole MCCB footprint that fits most 250 A frame panels without modification. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C — suitable for unconditioned enclosures in most industrial environments. The undervoltage release and auxiliary switches are factory-integrated, reducing field wiring and panel-builder labor compared to adding them as external modules.