Siemens SENTRON 3VA2063-5HN32-0HC0 — 63 A MCCB with Shunt Trip
The Siemens SENTRON 3VA2063-5HN32-0HC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries a 187 kA interrupting capacity at 240 V AC and 121 kA at 415 V, which puts it in the high-fault tier for industrial distribution panels where upstream transformer capacity or motor contributions push available fault current into six figures. The breaker is designed for line protection, meaning it sits at the feeder or main position protecting cables and busbars rather than a specific load. Factory-fitted with a shunt trip release (STL) and two HQ auxiliary switches, this variant is ready for remote tripping and status feedback without additional kit. The shunt trip lets a safety relay, E-stop circuit, or fire alarm system open the breaker electrically — critical for emergency-off chains or remote disconnect scenarios. The HQ auxiliary switches provide normally-open and normally-closed contacts for PLC inputs or panel indication.
SCCR and Selectivity — What the Ratings Mean for Your Panel
The 187 kA at 240 V is the maximum fault current this breaker can safely interrupt at that voltage. At 415 V it still handles 121 kA, and at 500 V it drops to 75.6 kA — still a very high figure for a 63 A frame. At 690 V the rating falls to 3 kA, so if you're on a 690 V system this breaker is not the main; it's a downstream device relying on upstream current limitation. The 63 A continuous rating holds flat from 40 °C to 70 °C ambient, which is unusual — most MCCBs start derating above 40 °C. That means this breaker can live in a hot panel (say, next to a drive or inside a solar combiner) without losing ampacity. Power loss is 5.4 W maximum at rated current. Operating temperature range is -25 °C to 70 °C.
Panel Fit and Mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep.