What this MCCB carries and where it fits
The Siemens SENTRON 3VA2325-6HN32-0BH0 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 band, which simplifies panel sizing in warm enclosures. Breaking capacity runs 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. That 242 kA at 240 V is the headline number for high-fault service-entrance or feeder applications in North American 240 V delta systems. It is designed for line protection (not motor or generator protection), so the trip curve and accessories are set for cable and busbar fault clearing, not overload pickup for a motor start.
Physical fit and panel integration
Dimensions: 248 mm tall, 138 mm wide, 110 mm deep. That depth is the key number for shallow enclosures — confirm the back-can clearance before wiring. The breaker ships with the base switch 3VA2325-6HN32-0AA0 and includes 2 auxiliary switches plus 1 trip alarm switch (HQ configuration). An undervoltage release (UVR) is fitted, so verify control voltage matches the coil rating before applying power. A mechanical trip indicator is present — no voltage trigger or communication function on this variant. Ground-fault monitoring is not integrated.
Thermal and environmental limits
Operates from -25 °C to 70 °C; stores from -40 °C to 80 °C. Maximum power loss is 40 W — factor that into enclosure ventilation if multiple breakers are ganged.