Siemens SENTRON 3VA2225-8HL32-0BC0 — 250 A MCCB, Line Protection
The Siemens SENTRON 3VA2225-8HL32-0BC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, designed for line protection in distribution panels. It carries an interrupting capacity of 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — covering a wide range of fault-current scenarios across global voltage standards. Built into the SENTRON family, this breaker includes an undervoltage release (UVR) and two auxiliary switches (HQ type) as standard, making it suitable for remote status monitoring and safety shutdown circuits. No communication module is fitted, so it's a straightforward line-protection device without integrated metering or fieldbus.
Current Derating and Thermal Performance
The 250 A rating holds flat from 40 °C to 50 °C. Above that, derating is linear: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs hot, size the breaker against the derated figure — not the nameplate 250 A. Maximum power loss is 50.5 W, which matters for enclosure thermal management if multiple breakers are ganged in a small cabinet. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.