What this 250 A MCCB is and where it fits
The Siemens SENTRON 3VA2325-5MN32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for continuous current of 250 A, designed specifically for motor protection. It carries the ETU350M electronic overcurrent release with integrated phase failure detection, and a factory-fitted shunt trip (STL) release for remote tripping. The 250 A rating holds from 40 °C through 50 °C; above that it derates to 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, and 225 A at 70 °C — so in a warm enclosure you need to account for the thermal drop. Breaking capacity scales with system voltage: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 17 kA at 690 V. That gives you SCCR headroom for most industrial distribution panels without needing a current-limiting upstream device. Rated insulation voltage is 800 V. Mechanical endurance is listed at 15 000 operations — typical for a 250 A frame in motor-starting duty. Max power loss is 37.5 W, which matters for heat buildup inside a sealed enclosure. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C.
Integration notes
Dimensions: 248 mm high, 138 mm wide, 110 mm deep — standard 3-pole MCCB footprint for 250 A frame. No auxiliary contacts or undervoltage release are fitted from the factory; the only integrated release is the shunt trip (STL). The base switch (3VA2325-5MN32-0AA0) and the auxiliary trip (3VA9688-0BL30) are separate orderable components if you need to add them later.