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. The thermal rating holds 63 A flat from 40 °C through 70 °C, so no derating is needed in a warm enclosure; that simplifies panel thermal budgeting. Designed for line protection, the breaker includes ground-fault monitoring via summation current formation on L + N conductors. No undervoltage release, no communication module, and no trip indicator are fitted on this variant.
Panel fit and environmental limits
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. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 5.4 W, low enough that forced ventilation is not required in most enclosures. Rated insulation voltage is 800 V.