63 A MCCB with ground-fault monitoring — panel fit and breaking capacity
The Siemens SENTRON 3VA2063-7HM46-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current, designed for line protection in distribution panels. Its interrupting capacity reaches 330 kA at 240 VAC, 242 kA at 415/440 VAC, and 187 kA at 500 VAC — at 690 VAC it still holds 3 kA, so it handles high-fault utility feeds without cascading upstream. The 800 V rated insulation voltage gives headroom for 690 V systems. Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard MCCB footprint for a 4-pole frame. The unit includes summation-current ground-fault monitoring on L+N, useful for detecting leakage on solidly-grounded systems without a separate GFCI module. No undervoltage release or communication function on this variant; it's a straightforward thermal-magnetic protector.