What this MCCB is and where it fits
The Siemens SENTRON 3VA1163-5ED32-0BC0 is a 3-pole molded case circuit breaker rated 63 A at 40 °C, designed for line protection in distribution panels. It carries a rated insulation voltage of 800 V and delivers a breaking capacity of 187 kA at 240 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream.
Breaking capacity across the voltage range
The interrupting rating drops as voltage rises: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 17 kA floor at 690 V matters for 600 V class industrial systems — it still clears a substantial fault without needing a current-limiting upstream device.
Thermal derating and power loss
Current rating holds flat at 63 A from 40 °C through 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. Maximum power loss is 19.8 W — useful to know for enclosure heat calculations when the panel is tightly packed.
Built-in auxiliary and release options
This variant ships with 2 auxiliary switches (HQ design) and an undervoltage release (UVR) factory-installed. The UVR trips the breaker when control voltage drops, which is standard for emergency-stop circuits or undervoltage protection on motor feeds. No ground-fault monitoring or communication module on this order code — it's a straight line-protection breaker.
Dimensions and panel fit
At 130 mm high, 76.2 mm wide, and 70 mm deep, this 3-pole breaker fits the standard SENTRON 3VA mounting footprint. The 70 mm depth is shallow enough for most 200 mm deep enclosures without crowding the door or busbar connections.