The Siemens SENTRON 3VA2225-6JQ32-0DL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a full-scale current of 250 A and a maximum interrupting capacity of 2 500 A. Thermal derating is built into the spec: the breaker holds 250 A continuously up to 50 °C ambient, then steps down to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C.
Integration notes
The UVR ensures the breaker drops out on loss of control voltage — useful for safety circuits where a voltage dip must open the main disconnect. Communication function is onboard, so the breaker can report status to a PLC or BMS without an add-on module.
Selectivity and coordination
Its high interrupting capacity (242 kA at 240 V, 187 kA at 415 V, 121 kA at 500 V) gives you headroom for selective coordination with downstream branch breakers — the goal is to clear a fault at the branch without taking the whole panel down. The 375 A minimum trip threshold and 2 500 A maximum setting range let you dial in the pickup for your specific load profile.