The Siemens SENTRON 3VA2225-6HL42-0AA0 is a 4-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with an ETU320 electronic overcurrent release. The 250 A frame holds that rating steady up to 50 °C before derating begins — at 55 °C it's still good for 241 A, and at 70 °C it's 213 A. That thermal curve is what you need for the selectivity study, not just the headline number.
At 415 V it still handles 187 kA, so it's equally at home in 400 V industrial distribution. The 4-pole design makes it suitable for three-phase plus neutral protection, common in European TN-S or TN-C-S systems. The ETU320 release is an electronic trip unit with adjustable long-time, short-time, and instantaneous settings — you dial in the protection curve rather than swapping thermal elements.
Integration into the enclosure
Front IP40. Maximum power loss 48 W.