The Siemens 5SY4150-8CC11 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated at 50 A and 400 V AC, with a breaking capacity of 10 kA per EN 60898. It also carries a maximum DC rating of 72 V. The terminals accept solid or stranded copper from 0.75 mm² up to 35 mm², with a tightening torque of 2.5 to 3.5 N·m. Both top and bottom terminals are combined (busbar-ready), and the unit is sealable for anti-tamper applications. The breaker is designed for railway applications and for mechanical engineering/industry use. Derating applies above 55 °C per the surrounding temperature influence table (max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C).
Installation & Integration
Panel integration is straightforward: the 18 mm width fits one standard module position on a DIN rail. Touch protection is built in.