The Siemens 5SY4313-7CC is a SENTRON miniature circuit breaker (MCB) — 3-pole, C-curve, rated 13 A at AC, with a 10 kA breaking capacity per EN 60898. The C characteristic means it handles moderate inrush, typical for motor starters and transformer banks in industrial control panels.
Derating and environment
Rated current holds at 13 A up to 35 °C ambient; at 40 °C it derates to 12.22 A, at 45 °C to 11.82 A, at 50 °C to 11.39 A, and at 55 °C to 10.95 A. The breaker operates from -40 °C to 75 °C, with humidity limits of 95% at 55 °C, 55% at 70 °C, and 35% at 75 °C. IP20 with connected conductors — panel-internal use only.