What this MCCB brings to the panel
The Siemens 3VA2163-5HL36-0BH0 is a SENTRON molded case circuit breaker (MCCB) built for line protection in industrial distribution. It carries a 63 A continuous rating that holds flat from 40 °C all the way to 70 °C — no derating curve to chase when the panel runs hot, which is the reality out here in the grease near motor drives and transformers. Breaking capacity is what decides whether this breaker clears a fault or welds shut. At 240 V it's rated 187 kA, at 415 V it's 121 kA, and it still holds 75.6 kA at 500 V. That's enough headroom for most industrial service entrances and motor control centers downstream of a large transformer. At 690 V the rating drops to 3.7 kA — it's not a 690 V main breaker, but for a 480 V or 400 V line it's got plenty of muscle. The 3-pole frame comes factory-fitted with an undervoltage release (UVR) and a complement of two auxiliary switches plus a trip alarm switch (HQ). That means you get remote status indication and a UVR that drops the breaker on loss of control voltage — useful for safety circuits or emergency-stop chains where you need the load isolated when the control supply dies.
Panel fit and thermal budget
Dimensions are 181 mm tall, 105 mm wide, 86 mm deep. That's a standard 3-pole MCCB footprint for a 63 A frame — it'll land in most panel layouts without re-drilling the backplate. The 6.5 W maximum power loss is modest; you're not cooking the enclosure, even in a sealed box with other breakers alongside it.