What this MCCB carries — and what it doesn't
The Siemens 3VA1063-3ED36-0HA0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release and a factory-fitted shunt trip (STL) auxiliary release (order code 3VA9688-0BL30 for the trip unit itself). Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — that SCCR headroom means it clears high-fault bolted faults on 480Y/277 V distribution without cascading upstream, as long as the series rating is coordinated. The thermal-magnetic curve is fixed — no electronic adjustment, no communication module, no ground-fault monitoring, and no undervoltage release on this variant. It's a line-protection breaker, not a motor-circuit protector; the TM210 release is sized for cable and busbar protection, not for starting inrush.
Thermal derating — what the 63 A rating actually means in a warm panel
The 63 A continuous rating holds flat from 40 °C through 50 °C. Above that it steps down: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel ambient runs 55 °C, you're losing about 4 % of the headline rating — plan the load accordingly. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The front face carries IP40 protection — fine for a clean indoor panel, but not for washdown or dust-laden environments.
Footprint and panel fit
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON distribution blocks and panelboard mounting bases without re-drilling. No auxiliary contact block is fitted (without auxiliary contact version), and there is no trip indicator. If you need remote status or a visual flag, you'll be adding a separate auxiliary switch or indicator module downstream.