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. It is designed for line protection and includes an integrated undervoltage release (UVR). The 63 A rating holds steady through 50 °C, then derates linearly to 58 A at 70 °C — useful for panels running warm near other heat sources. 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.
Insulation voltage is rated 800 V, and maximum power loss at rated load is 19.8 W. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. No communication function or ground-fault monitoring is built in — this is a straightforward thermal-magnetic breaker with undervoltage release, suited for feeder or branch protection where remote monitoring is not required.