What this MCCB delivers
The Siemens SENTRON 3VA2450-7JP42-0AA0 is a 4-pole molded case circuit breaker rated for continuous 500 A at 40 °C, carrying the same rating through 50 °C before it begins to derate — 477 A at 55 °C, 455 A at 60 °C, 432 A at 65 °C, and 410 A at 70 °C. Breaking capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 9 kA at 690 V. The electronic trip unit is an ETU550, which provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Communication function is built in, enabling integration with higher-level monitoring or energy management systems without an external module. It carries no undervoltage release, no voltage trigger, and no ground-fault monitoring version — the protection logic lives entirely in the ETU550.
Panel fit and environment
Dimensions are 248 mm high, 184 mm wide, and 110 mm deep. Maximum power loss is 99 W, which should be factored into enclosure thermal calculations, especially in a multi-breaker lineup.