63 A MCCB with flat derating curve to 70 °C
The Siemens 3VA2063-6HM42-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 63 A continuous current, with a full-scale setting of 63 A and an initial pickup of 16 A. Its interrupting capacity reaches 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V — meaning it can clear high-fault currents in low-voltage distribution without cascading upstream. Designed for line protection, the breaker includes ground-fault monitoring via summation current formation on L + N conductors.
Dimensions are 181 mm high, 140 mm wide, and 86 mm deep — a 4-pole MCCB footprint that fits standard Siemens 3VA2 mounting plates and busbar systems. Maximum power loss is 5.4 W, low enough that forced ventilation is not required in most enclosures.