What this 250 A SENTRON MCCB carries
The Siemens 3VA2225-5JQ32-0DC0 is a 3-pole SENTRON molded case circuit breaker on a 250 A frame, designed for line protection in distribution panels. Rated 250 A continuous at 40 °C, it derates to 200 A at 70 °C — the thermal curve governs the real ampacity in a warm enclosure. Interrupting capacity runs 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. That 690 V figure is low enough that a fault at that voltage likely needs an upstream current-limiting fuse; the 415 V and 500 V numbers give solid SCCR headroom for most industrial panel feeds. This variant includes an undervoltage release (UVR) and a communication function, so it can be tied into a monitoring or remote-trip scheme. The auxiliary switch design is two HQ auxiliary switches. Maximum power loss is 50.5 W — factor that into the enclosure thermal budget if the panel is densely packed.
Panel fit and footprint
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for the 250 A frame — it occupies three 35 mm DIN-rail modules plus a bit of side clearance for the arc chute. The 86 mm depth keeps the breaker within the typical 200 mm deep enclosure; no need for a deeper gland plate.