The Siemens 3VA1063-2ED32-0HC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous at 40 °C, with full current hold through 50 °C — no derating needed in a standard ventilated enclosure. Above that, it steps down to 60.48 A at 55 °C and 56.7 A at 70 °C, so if your panel runs hot near the top of the cabinet, check the thermal curve before sizing. Breaking capacity is the headline: 52.5 kA at 240 V AC, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. That 52.5 kA figure at 240 V means it handles high-fault scenarios on the secondary side of a 480/277 V step-down transformer or a 240 V distribution bus without cascading upstream — the SCCR headroom is real for a 63 A frame. That's a workhorse choice for motor branch circuits or general distribution where you don't need LSIG selectivity curves; the magnetic pickup is factory-set and non-adjustable. Two HQ auxiliary switches are built in, giving status feedback without an add-on module.
Mounting and integration — fits a standard MCCB footprint
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — the 3VA frame width matches the common 3-pole MCCB footprint on DIN rail or panel-mount. Rated insulation voltage 800 V.