Siemens 5SL4263-7CC — SENTRON 2-pole MCB, C-curve, 63 A
The Siemens 5SL4263-7CC is a SENTRON miniature circuit breaker rated 63 A at 30 °C with a C tripping characteristic, designed for 2-pole (2P) protection in residential and infrastructure panels.
Thermal derating and ambient limits
At 40 °C it derates to 59.67 A, at 45 °C to 57.93 A, at 50 °C to 56.14 A, and at 55 °C to 54.29 A — per the datasheet's published curve.
Physical fit and mounting
IP20 with connected conductors, so it belongs inside a closed enclosure, not exposed to washdown or dust.