Molded Case Circuit Breaker for Line Protection
The Siemens SENTRON 3VA2225-6KP32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in industrial power distribution panels. Its breaking capacity reaches 242 kA at 240 V and 187 kA at 415 V, meaning it can safely interrupt high fault currents without cascading upstream — critical for maintaining selectivity in a distribution board. The unit includes a shunt trip (STL) release and two auxiliary switches (HQ), enabling remote tripping and status feedback for integration into a safety circuit or power management system.
Thermal Derating and Ambient Performance
The breaker holds its full 250 A rating from 40 °C through 50 °C, then derates linearly to 200 A at 70 °C — a profile that suits enclosed switchgear or high-ambient machine rooms without oversizing. Maximum power loss is 48 W, which should be factored into the enclosure thermal budget, especially when multiple breakers are ganged.
Communication and Auxiliary Functions
This variant includes a communication function, allowing integration with higher-level control or monitoring systems — useful for remote load management or energy monitoring in a facility. The supplied basic switch is order code 3VA2225-6KP32-0AA0; the auxiliary switch block provides two HQ-rated contacts for status indication or interlocking.