Siemens 3VA2463-6KP32-0BC0 SENTRON MCCB, 630 A, 3-Pole

Above that temperature, the rating derates linearly: 600 A at 45 °C, 570 A at 50 °C, down to 450 A at 70 °C. Short-circuit breaking capacity varies sharply with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. At 415 V — common in industrial distribution — the 187 kA SCCR gives substantial headroom for high-fault panels. At 690 V the 9 kA rating is the limiting factor; verify your available fault current before specifying. The I²t selectivity range spans 945 A minimum to 5 670 A maximum, which defines the zone where the breaker coordinates with downstream devices for selective tripping. Set the instantaneous pickup within this band to avoid nuisance trips on transformer inrush or motor start.