630 A MCCB with voltage-dependent SCCR and temperature derating
Its short-circuit breaking capacity is voltage-dependent: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. The minimum breaking capacity is 945 A, and the maximum is 5,670 A. Temperature derating applies: at 40 °C ambient the breaker carries its full 630 A; at 50 °C it derates to 570 A; at 60 °C to 510 A; and at 70 °C to 450 A. Maximum power loss is 162 W. These ratings govern the breaker's safe application in a panel — if the enclosure ambient runs hot, the continuous current must be adjusted accordingly.
Panel fit and compliance documentation
The 3-pole frame mounts on a standard panel backplate; allow clearance for arc-chute exhaust per Siemens installation instructions. The communication function (PROFIBUS, PROFINET, or Modbus TCP depending on the communication module — verify at order) enables remote trip indication and parameter readback, which simplifies troubleshooting in a multi-breaker lineup. The breaker is designed to IEC 60947-2 and carries UL/CSA listings where applicable. Request the specific declaration at time of order for your jurisdiction.