What the ratings mean for fit
The 3VA2163-5HL36-0KL0: The 63 A continuous rating is the thermal-magnetic trip's backbone — it's rated for the full 63 A load at any ambient from 40 °C up to 70 °C, which is unusual. Most MCCBs start derating above 40 °C; this one doesn't, so you can mount it in a hot panel next to drives or transformers without oversizing. The 187 kA interrupting rating at 240 V is the headline number, but the real-world selectivity story is at 415 V (121 kA) and 500 V (75.6 kA). At 690 V it drops to 3.7 kA — that's still enough for most 690 V motor branch circuits, but you'll need coordination study if you're feeding a 690 V transformer secondary. The breaker ships with a shunt trip release (STL) and a full complement of auxiliary switches: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch. That means you get remote status, trip indication, and a separate alarm contact without adding aftermarket modules. The supplied basic switch is order code 3VA21635HL360AA0.
Where it goes in the panel
It's a 3-pole SENTRON MCCB sized for line protection — meaning it's the main or feeder breaker in a distribution panel, not a motor-circuit protector. Dimensions are 105 mm wide by 181 mm tall by 86 mm deep, which fits standard Siemens SENTRON mounting bases and busbar systems. The trip indicator and voltage trigger are built in, so you don't lose panel space to add-on indicators.