63 A MCCB with thermal-magnetic trip and undervoltage release
The Siemens 3VA1163-5EE32-0CC0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C ambient, 3-pole, designed for line protection in distribution panels. Its breaking capacity reaches 187 kA at 240 VAC, 121 kA at 415 VAC, and 75.6 kA at 440 VAC — figures that govern fault-clearing capability at the point of installation. The unit includes an undervoltage release (UVR) and two auxiliary switches HQ, so it can signal trip status back to a PLC or safety circuit without an add-on module.
Thermal derating and power loss
Full 63 A rating holds through 50 °C ambient; above that, derate linearly to 58 A at 70 °C (per the spec table). Maximum power dissipation is 19.8 W — relevant for enclosure thermal calculations when grouping multiple breakers. Rated insulation voltage is 800 V, so the breaker is suitable for 690 VAC systems with margin.
Mounting dimensions and panel fit
Width 76.2 mm (3 in), depth 70 mm (2.76 in), height 130 mm (5.12 in). Standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration. Verify busbar spacing and enclosure depth against the 70 mm projection including the auxiliary switch stack.