What this MCCB delivers on the line
The Siemens SENTRON 3VA2063-6HN32-0BC0 is a 3-pole molded case circuit breaker rated at 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Breaking capacity sits at 242 kA at 240 V AC, 187 kA at 415/440 V, and 121 kA at 500 V, with a steep drop to 3 kA at 690 V. That 242 kA figure at 240 V puts this squarely in high-fault-duty applications like transformer secondaries or large motor control centers where upstream fault current can exceed 200 kA.
Built-in release and auxiliary contact configuration
This variant ships with an undervoltage release (UVR) as standard — the designated auxiliary release type per the design — plus two auxiliary switches HQ. The UVR ensures the breaker trips on loss of control voltage, which matters for safety circuits where a voltage dip must open the protected load. No communication function or ground-fault monitoring is included; this is a straight line-protection device with a trip indicator absent, so fault indication relies on the auxiliary contacts wired back to a PLC or annunciator panel.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard SENTRON 3VA frame size that mounts on a DIN rail or directly to a backplate via the integrated mounting lugs. The 86 mm depth means it clears most standard enclosure depths without a sub-panel extension. Power loss at rated current is 7.9 W maximum, which is modest for a 63 A MCCB; ventilation around the breaker in a sealed enclosure is still advisable if multiple units are ganged.