The Siemens 3VA1163-6EF32-0AG0 is a 3-pole SENTRON molded case circuit breaker rated for line protection, carrying 63 A continuously at 40 °C and derating to 58 A at 70 °C. Its interrupting capacity hits 220 kA at 240 V, dropping to 154 kA at 415 V and 121 kA at 440 V — still substantial headroom for most industrial service-entrance or feeder applications. The TM240 thermal-magnetic release handles overload and short-circuit response without external power.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint for panel-mounting on a DIN rail or direct screw fixing.
Thermal derating and ambient range
Full 63 A rating holds through 50 °C; at 55 °C it drops to 62 A, at 60 °C to 61 A, and at 65 °C to 60 A. At 70 °C ambient you're at 58 A. If your panel sits near a furnace or in a hot attic, use the 60 °C or 65 °C row for sizing.