63 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2163-5HN32-0BC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current from 40 °C to 70 °C. Interrupting capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V puts it in the high-fault tier — suitable for large transformer secondaries or industrial services where available fault current runs high. The 3.7 kA at 690 V is the weak leg; if your system runs at 690 V, verify that the available fault current stays under that number.
Line protection with undervoltage release
This MCCB is designated for line protection — it's the main feeder or branch breaker, not a motor-protective device. It ships with an undervoltage release (UVR) fitted, which trips the breaker when supply voltage drops below a threshold, and two auxiliary switches (HQ design) for remote status indication. No ground-fault monitoring, no communication module, no trip indicator on the front face. Power loss is 6.5 W maximum — negligible for thermal budgeting in a closed panel, but worth noting if you're packing multiple breakers in a small enclosure. Dimensions are 105 mm wide, 181 mm high, 86 mm deep; that's a standard SENTRON 3VA frame footprint, so it swaps into existing 3VA panel layouts without re-drilling the mounting plate.