What this MCCB brings to the panel
The Siemens SENTRON 3VA2163-5MQ32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Breaking capacity hits 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That kind of headroom means it can sit upstream of a high-fault panel without worrying about cascading failure. It's designed for motor protection (the product designation says so), and it includes phase failure detection and a communication function — so it can talk to a PLC or BMS about what's happening on the line. That's useful when you need to know a phase dropped before the motor starts single-phasing.
Sizing and fit in the enclosure
Footprint is 105 mm wide, 181 mm tall, and 86 mm deep. That 86 mm depth is the dimension you'll want to check against the gland plate clearance or the back of a shallow enclosure — it's not a deep breaker, so it fits in most standard distribution boards. Width is the usual 3-pole MCCB pitch; it'll sit on a DIN rail or bolt directly to the mounting plate.