What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-7KP32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, built around the ETU850 electronic trip unit. It's designed for line protection in distribution panels, motor control centers, and industrial switchgear where you need adjustable protection curves and communication capability. Breaking capacity is the headline here: 330 kA at 240 V, 242 kA at both 415 V and 440 V, 187 kA at 500 V, and 6.3 kA at 690 V. Those numbers mean it handles high-fault-current scenarios typical of large transformer secondaries or industrial busways — the 330 kA at 240 V is what you'd see on a big 208Y/120 V or 240 V delta service entrance. Temperature derating matters for panel layout: it carries the full 250 A up to 50 °C ambient, then steps down to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If your enclosure runs hot — say next to a drive lineup or a transformer — you'll need to account for that drop above 50 °C.
What's built into the frame
The breaker includes an undervoltage release (UVR) as the auxiliary release type, plus a 2 auxiliary switch + 1 trip alarm switch HQ auxiliary contact block. Communication function is onboard, and the ETU850 allows adjustable protection parameters — LSI (long-time, short-time, instantaneous) plus ground-fault pickup if you add the optional module. Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That's a standard 3-pole MCCB footprint for the 250 A frame size — mounts in a panel or enclosure with appropriate busbar or cable connections. Power loss is 50.5 W maximum, so factor that into your enclosure thermal calculation. Rated insulation voltage is 800 V, and the operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. That covers most indoor industrial environments, including unheated warehouses in cold climates.