What this MCCB delivers
The Siemens SENTRON 3VA2325-7HM32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. Its ETU330 electronic trip unit gives you adjustable long-time delay (0.5 to 17 s) and short-time pickup, so you can shape the curve for selective coordination downstream. Breaking capacity is the headline: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V. That 330 kA figure at 240 V means this breaker can interrupt a fault current that high without welding contacts or venting plasma — critical for large transformer secondaries or busway feeds where available fault current is extreme. Rated insulation voltage is 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, but not for washdown environments. The unit accepts an optional motor drive for remote open/close, and the latching mechanism is rated for 20 000 operations.