What the ratings mean for fit
The Siemens 3VA1163-4ED36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated 63 A continuous at 40 °C, with a TM210 thermal-magnetic overcurrent release. That 63 A holds flat through 50 °C, then derates to 58 A at 70 °C — so if your panel ambient runs hot, you still get full current up to 50 °C, which covers most enclosed switchgear. The interrupting ratings are the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 121 kA at 240 V means it can clear a fault on a high-capacity 240 V distribution bus without upstream fuses — useful for service-entrance or large subfeed applications. The 75.6 kA at 415 V covers most European industrial networks. The 11.9 kA at 690 V is lower, so if you're on a 690 V system, verify the available fault current doesn't exceed that. Three poles, line-protection design, no undervoltage release, no communication module. Rated insulation voltage is 800 V. Front IP40 — fine for a dry panel, not for washdown.
Panel fit and mounting
Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in). That 70 mm depth is the body only — leaves room for rear terminals and wiring in a standard 200 mm deep enclosure. Three-pole, so it takes up a 3-module-wide footprint on the DIN rail or panel-mount plate. No trip indicator, no voltage trigger, no ground-fault monitoring — it's a straight thermal-magnetic breaker, no frills.