SENTRON 3VA2063-5KP32-0CH0 — 63 A MCCB with 187 kA Interrupting Capacity
The Siemens SENTRON 3VA2063-5KP32-0CH0 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 in a warm panel. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. Built for line protection, it includes an undervoltage release (UVR) and a communication function — meaning it can be tied into a building management or industrial control network for remote tripping and status. The auxiliary switch block carries 2 auxiliary switches plus a separate trip alarm switch (HQ type), giving three discrete signal paths for PLC or SCADA input.
Integration & Mounting
At 105 mm wide, 181 mm tall, and 86 mm deep, it fits standard panel-mount cutouts for 3-pole MCCBs in this frame size. Power loss is 7.9 W maximum — negligible for panel thermal budgeting, but worth noting if the enclosure is sealed and tightly packed. Operating range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C, so it handles unheated warehouses and rooftop enclosures.
Coordination Notes
The 63 A frame with 187 kA SCCR at 240 V gives strong selectivity headroom downstream — you can size branch breakers down to 15 A without worrying about nuisance trip coordination on a high-fault transformer secondary. For a 690 V line (rare in industrial distribution but common in mining or wind), the breaking capacity drops to 3 kA — verify the available fault current before specifying in a 690 V system.