What this MCCB carries
The Siemens SENTRON 3VA2063-5HN36-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a continuous current rating of 63 A at ambient temperatures up to 50 °C before derating begins. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V — figures that tell you it's sized for high-fault panels where a standard MCCB would weld shut on a dead short. The ETU350 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, not just a fixed thermal-magnetic bimetal.
Panel fit and derating
The breaker body measures 105 mm wide by 181 mm tall by 86 mm deep — a standard SENTRON 3VA frame footprint that drops into existing DIN-rail or screw-mounted panel layouts without re-drilling. Current rating holds flat at 63 A through 50 °C ambient; above that it steps down to 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. If your panel runs hot, size the load against the derated figure, not the nameplate. Maximum power loss is 7.9 W — negligible for ventilation planning in a standard enclosure, but worth tallying if you're stacking several breakers in a sealed box.
Auxiliaries and releases
This variant ships with an undervoltage release (UVR) factory-installed — part number 3VA9608-0BB11 — and two high-capacity auxiliary switches (HQ type) for status feedback to a PLC or annunciator. No trip indicator, no voltage trigger, no communication module, no ground-fault monitoring on this build. If you need those, you're looking at a different suffix in the 3VA2 family. Rated insulation voltage is 800 V; mechanical endurance is 20,000 operations.