630 A MCCB with TM240 release and UVR — selectivity backbone for high-fault panels
The Siemens SENTRON 3VA1463-7EF32-0DJ0 is a 3-pole molded case circuit breaker rated 630 A at 40 °C, built around a TM240 thermal-magnetic overcurrent release. Rated insulation voltage is 800 V, and the breaker delivers full 630 A through 50 °C ambient before derating begins — at 70 °C it still carries 583 A. That thermal margin suits it for enclosed or high-ambient panels where downstream breakers lose headroom faster.
Breaking capacity across voltages — coordination planning
The 3VA1463-7EF32-0DJ0's Icu is 440 kA at 240 V, 242 kA at 415 V and 440 V, 154 kA at 500 V, and 17 kA at 690 V.
The 138 mm width is a 3-pole frame — verify the existing busbar or lug spacing matches before panel rework.