What this MCCB delivers for your panel
The Siemens SENTRON 3VA2225-6JQ42-0AA0 is a 4-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with an ETU560 electronic trip unit for adjustable line protection. Its interrupting capacity reaches 242 kA at 240 V AC and 187 kA at 415 V AC — figures that cover most industrial fault-current scenarios without cascading upstream breakers. The 86 mm depth and 140 mm width fit standard SENTRON panel cutouts, so it swaps into existing 3VA footprints without re-drilling the backplate.
Rating breakdown for selectivity and coordination
The 250 A frame (Iu) holds full rating up to 50 °C; above that it derates to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 213 A at 70 °C. That thermal curve matters when the breaker sits in a crowded enclosure — the 48 W maximum power loss adds to the internal heat rise, so account for it in your panel thermal calculation. The ETU560 trip unit supports adjustable N-conductor protection from OFF to 20-100% of the phase current, which is useful for 4-wire systems where the neutral may carry harmonic loads.
Mounting and environmental fit
Front-face protection is IP40 — rated for indoor panel installation where no water jets or dust ingress are expected. The 4-pole design with 181 mm height and 140 mm width matches the standard SENTRON 3VA frame, so it drops into existing panel layouts that already use 3VA breakers. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.