The Siemens SENTRON 3VA1163-4EF32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic release that handles both overload and short-circuit protection in a single unit. It's a line-protection breaker — meaning it's sized for feeder and distribution circuits, not motor-starting duty where a separate overload relay would be needed. Breaking capacity is the headline here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. Those numbers tell you this breaker can sit upstream of a high-fault panel without needing a current-limiting fuse ahead of it — the 121 kA at 240 V covers most North American service-entrance scenarios, and the 75.6 kA at 415 V handles European industrial distribution.
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB size that fits most DIN-rail or panel-mount enclosures.
Above that it derates: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, 56.7 A at 70 °C.