What this MCCB carries and where it fits
The SENTRON 3VA2225-5JQ32-0CC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current and delivering a 187 kA interrupting rating at 240 V AC. That breaking capacity means it can clear a bolted fault on a low-voltage transformer secondary or a large motor branch without the arc re-striking — the kind of fault current you see in a 480 V switchboard feeding a pump station or a conveyor line. At 415 V it still holds 121 kA, and at 690 V it derates to 5.1 kA, so the application voltage governs which fault level you design to. It carries the ETU560 electronic trip unit — that is a microprocessor-based release with adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The undervoltage release (UVR) is built in, so if the control voltage drops the breaker opens automatically, which is standard practice for safety circuits on lift-station pumps or chemical-feed skids that need a fail-safe drop. Two HQ auxiliary switches are fitted for status feedback to a PLC or a remote annunciator. The 250 A rating holds flat from 40 °C to 50 °C — no derating in a typical warm panel. Above 50 °C it steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, 200 A at 70 °C. If the breaker lives in a non-ventilated enclosure near a digester or a boiler, you need to account for that curve. Maximum power loss is 50.5 W, which matters for heat rise in a multi-breaker lineup.
Panel fit and footprint
The 3VA2225-5JQ32-0CC0 measures 105 mm wide by 181 mm tall by 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for the 3VA2 frame — it drops into the same mounting slots as other 3VA2 breakers in the 250 A class, so a panel laid out for a 3VA2116 variant will accept this unit without drilling new holes or shifting the bus. The 86 mm depth leaves room for rear-connected bus bars or a cable-entry gland plate in a 400 mm deep enclosure.