The Siemens SENTRON 3VA1163-6EF32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, with a breaking capacity of 220 kA at 240 V — that is the short-circuit rating that governs its use on high-fault panels like main distribution boards or feeder breakers where the available fault current is substantial. Line protection design. 800 V rated insulation voltage.
It begins to derate above 55 °C: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. In a sealed, uncooled enclosure that runs hot, expect to lose 5 A off the nameplate — plan your load accordingly. Maximum power loss is 19.8 W.
The interrupting rating drops as voltage rises: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V.