What this 250 A MCCB carries — and where it fits
The Siemens SENTRON 3VA2325-5HN32-0CH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C through 70 °C — no derating needed across that span, which simplifies panel sizing in warm enclosures. Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V, so it handles high-fault service-entrance or distribution positions without cascading upstream breakers. The 110 mm depth and 138 mm width fit standard MCCB panel footprints, and the built-in undervoltage release (UVR) plus 2 auxiliary switches and a trip alarm switch give the control wiring what it needs for status feedback and safety interlocks.
Interrupting capacity by voltage — the real fault-handling envelope
The 3VA2325-5HN32-0CH0 is rated for line protection, meaning its trip curve and short-time withstand are tuned for feeder and main breaker duty rather than motor or generator protection. At 240 V it clears 187 kA symmetrical — enough for most North American service-entrance positions. At 415/440 V it still holds 121 kA, which covers heavy industrial distribution in 400 V class systems. At 690 V the rating drops to 7.5 kA, so if you're on a 690 V line-up, verify the available fault current stays under that threshold.
Panel integration notes
At 110 mm deep, 138 mm wide, and 248 mm tall, this breaker fits standard MCCB mounting plates and enclosure cutouts. The 3-pole design with line protection curve means it's sized for cable/ busbar protection, not motor overload — pair it with a separate overload relay if feeding a motor starter. Maximum power loss is 40 W, so factor that into enclosure thermal calculations if grouping several breakers. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.