63 A MCCB with serious interrupting muscle
The Siemens 3VA2163-5MN32-0KA0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm panel. Interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. That's selectivity headroom for a main breaker feeding downstream distribution in an industrial switchboard.
Panel fit — 105 mm wide, 86 mm deep
Dimensions are 105 mm wide, 86 mm deep, 181 mm tall. That's a standard 3-pole MCCB footprint — it drops into a SENTRON 3VA2 panel cutout or onto a mounting plate without surprises. The 4 W maximum power loss is modest; no forced ventilation needed in a typical enclosure.