What it is and what the ratings mean
The Siemens SENTRON 3VA1163-6EF36-0KA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection in distribution panels. Its continuous current rating holds at 63 A from 40 °C through 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C — so for a 63 A load, keep ambient below 50 °C or step up a frame size. The interrupting capacity is 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V; that 220 kA rating at 240 V means it can safely clear a fault on a high-capacity transformer secondary without upstream coordination issues.
Integration and panel fit
The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm high — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. Rated insulation voltage is 800 V, so it is suitable for 480/277 V and 600 V systems with margin. Maximum power loss is 17.3 W; factor that into enclosure thermal calculations if the panel is tightly packed.