63 A MCCB with 220 kA interrupting rating — what that means for your panel
The Siemens 3VA1163-6ED36-0AA0 is a 3-pole SENTRON molded case circuit breaker rated 63 A continuous at 40 °C, with a TM210 thermal-magnetic trip unit. Its headline interrupting capacity is 220 kA at 240 V AC — that is the fault current it can safely clear without welding contacts or rupturing the case, which matters when you are coordinating downstream breakers on a high-capacity transformer secondary. At 415 V the rating holds at 154 kA, and at 440 V it is 121 kA. Above 500 V the curve drops to 17 kA and holds there through 690 V — so if your distribution runs at 480 V or 600 V class, the available fault current at the bus must stay under 17 kA for this breaker to be the sole OCPD. The thermal derating is mild: 63 A from 40 °C through 50 °C, then 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. In a sealed panel with ambient near the upper end, you lose about 8 % of the continuous rating — plan the load margin accordingly.
Panel fit and mounting
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB envelope that drops into most SENTRON panelboards or DIN-rail adapter plates. IP40 on the front means it is protected against tools and wires >1 mm, but not against dust ingress; keep it inside a rated enclosure for washdown or outdoor duty.