What the ratings mean for fit
The Siemens SENTRON 3VA1063-3ED32-0AD0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic release. The breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — these are the fault currents it can safely interrupt at each voltage level, so the panel's available fault current at the breaker's line side must fall within these limits for the system to coordinate. The 63 A rating holds steady up to 50 °C; above that it derates to 60.48 A at 55 °C and 56.7 A at 70 °C, which matters if the breaker lives in a hot enclosure. The IP40 front protection means it's fine for a dry indoor panel but not for washdown areas.
Panel fit and integration
The 3VA1063-3ED32-0AD0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard SENTRON 3VA footprint that drops into a DIN-rail or screw-mounted panel slot. The width is a tight 3-inch (76.2 mm) per pole, so a 3-pole unit takes about 3 inches of rail space. Operating temperature range is -25 °C to 70 °C; storage range -40 °C to 80 °C. The IP40 front keeps dust out of the trip mechanism in a typical enclosure.