The Siemens SENTRON 3VA1163-4EF32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A continuous at 40 °C, with a maximum breaking capacity of 121 kA at 240 V AC. The 121 kA interrupting rating at 240 V covers high-fault utility feeds; at 415 V it still clears 75.6 kA, and at 690 V it manages 11.9 kA.
The 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit a standard MCCB slot on a DIN rail or panel-mount base. Height is 130 mm (5.12 in). The undervoltage release (UVR) is factory-fitted — verify coil voltage against the control circuit before wiring; the release trips the breaker on loss of control power, which is typical for emergency-stop chains or undervoltage protection schemes.
Compared to the 3VA1110-5EF32-0LA0 (a 100 A frame with electronic trip), this 3VA1163-4EF32-0BA0 uses a TM240 thermal-magnetic overcurrent release and tops out at 63 A. The 3VA1110-5EF32-0LA0 offers higher ampacity and adjustable trip settings but lacks the factory UVR this unit carries. Panel cutout dimensions are similar across the 3VA1 frame family, so a swap between the two requires checking the lug kit and trip curve, not the mounting footprint.