The Siemens SENTRON 3VA1163-3EF32-0KH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a thermal-magnetic release (TM240) tuned for line protection.
Breaking capacity across voltages — selectivity planning
Breaking capacity drops as voltage rises: 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. If your fault-current study shows a higher prospective short-circuit at your system voltage, this breaker may not coordinate — verify the point-of-common-coupling level before committing the BOM line.
Thermal derating — real-world current handling
Full 63 A holds through 50 °C ambient. Above that, it derates: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C.
The lifecycle stage is current — this is an active, in-production part.
Mounting and enclosure fit
The 76.2 mm width (roughly 3 inches) matches standard MCCB mounting footprints; verify the backplate cutout against your existing DIN-rail or panel-mount pattern.