What this MCCB delivers on the line
The Siemens SENTRON 3VA2163-6HN32-0BL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full -25 °C to 70 °C operating range — no derating needed as ambient climbs. Breaking capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA figure at 240 V means it can safely interrupt a fault current up to that level without cascading upstream — critical for high-fault panels near large transformers or utility feeds. Built for line protection, this MCCB includes an undervoltage release (UVR) that drops the breaker when supply voltage falls below a set threshold — a standard requirement for safety circuits that need to guarantee a controlled shutdown on brownout or phase loss. The auxiliary switch configuration (2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ) gives the panel builder discrete feedback for status indication and PLC inputs without adding external relays.
Panel fit and thermal management
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard SENTRON 3VA footprint that drops into existing DIN-rail or screw-mounted panel layouts. The 6.5 W maximum power loss at rated load is modest for a 63 A frame, so internal enclosure temperature rise stays manageable even in a densely packed cabinet. No forced ventilation required in most industrial enclosures, but keep the thermal curve in mind if ambient inside the panel exceeds 70 °C.