What this 63 A MCCB does for a panel
The Siemens SENTRON 3VA2063-5HM32-0AA0 is a 3-pole molded case circuit breaker rated 63 A continuous at 40 °C through 70 °C — no derating needed across that span, which simplifies panel layout when the breaker sits near warm drives or transformers. Its breaking capacity climbs to 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 3 kA at 690 V — so for a 400 V distribution board, you get 121 kA of fault-clearing headroom, enough to coordinate downstream in most industrial panels without cascading upstream. Rated insulation voltage is 800 V, and the unit draws a maximum power loss of 5.4 W — negligible for enclosure thermal budgeting, but worth noting if you're packing several breakers in a sealed cabinet.
Ground-fault monitoring and design intent
The ground-fault monitoring version uses summation current formation on the L-conductor — it sums the phase currents and trips on imbalance, which is the standard approach for solidly-grounded systems. No undervoltage release or communication function on this variant, so it's a straight line-protection device without add-on modules.
Panel fit and dimensions
At 105 mm wide, 181 mm tall, and 86 mm deep, this breaker fits the standard SENTRON 3VA fixed-mount footprint. The 86 mm depth clears most enclosures with room for wiring gutters.