What this 250 A SENTRON MCCB carries
The Siemens 3VA2225-6JQ32-0KL0 is a SENTRON molded case circuit breaker on a 250 A frame, 3-pole, designed for line protection in distribution panels. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V, which covers most industrial service-entrance and feeder applications where high fault current is expected. At 690 V the rating drops to 4.5 kA — that's the limit for a 690 V bus; if your panel runs that voltage, verify the available fault current stays under that number. Thermal derating is published from 40 °C through 70 °C. The breaker carries a full 250 A up to 50 °C ambient; at 55 °C it's 238 A, at 60 °C it's 225 A, and at 70 °C it's 200 A. If your panel runs hot — say near a drive lineup or in a non-conditioned enclosure — use the 70 °C figure for your continuous load calculation, not the 250 A nameplate. The breaker ships with a shunt trip (STL) release, two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ configuration). Communication function is built in, which means it can report status and trip events to a BMS or PLC without an add-on module. The basic switch variant is 3VA2225-6JQ32-0AA0 — the -0KL0 suffix adds the communication and alarm package.
Panel fit and dimensions
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB form factor that drops into most SENTRON or third-party distribution panels without re-drilling. The 86 mm depth (3.39 in) is shallow enough for 200 mm deep enclosures; check your panel's internal clearance if you're retrofitting into an existing bucket.
Environmental and electrical limits
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss at rated current is 48 W — that's the heat the breaker dumps into the enclosure, so factor it into your panel thermal budget if you're packing multiple breakers in a sealed box.