The Siemens SENTRON 3VA2163-7MS36-0DA0 is a 3-pole molded case circuit breaker (MCCB) with a rated current of 63 A across the full ambient range from 40 °C to 70 °C, meaning no derating is needed for elevated panel temperatures up to that limit. The design is explicitly for starter protection, so the trip curve and internal construction are tuned for motor-start inrush and overload profiles rather than straight feeder duty.
The basic switch variant is order code 3VA2163-7MS36-0AA0, which omits the UVR; the -0DA0 suffix adds the undervoltage release as a factory-integrated option.
Panel fit and mechanical constraints
Maximum power dissipation is 6.5 W at rated load, so thermal rise within a sealed enclosure is manageable; still, adjacent devices should be spaced per Siemens derating guidelines for ambient above 70 °C.