The SENTRON 3VA2225-5JQ32-0AF0 is a 3-pole molded case circuit breaker rated for line protection, with a full-scale current of 250 A at 40 °C ambient. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V — so the interrupting rating drops sharply above 500 V; verify the available fault current at your system voltage before committing the BOM line. Thermal derating is published stepwise: holds 250 A up to 50 °C, then 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If the panel ambient runs above 50 °C, size the breaker for the derated current — not the 250 A nameplate.
Panel fit and wiring
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard MCCB footprint for a 250 A frame. The 105 mm width means it occupies three adjacent 35 mm DIN-rail modules (3 x 35 mm) with no overhang; plan for side clearance per the manufacturer's mounting instructions. Comes with one auxiliary switch and one trip alarm switch (HQ design) factory-fitted. No undervoltage release or other auxiliary release is included. The communication function is present, so it can integrate with a higher-level monitoring system if the panel supports it.