The Siemens 3VA2163-5KP32-0BA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 63 A across the full ambient range from 40 °C through 70 °C — no derating needed as the panel warms up.
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep (4.13 x 7.13 x 3.39 inches). Power loss maxes at 6.5 W, so thermal rise inside the cabinet is minimal; no forced venting required for a single unit.
