The Siemens 5SY4604-8CC11 is a SENTRON miniature circuit breaker rated 4 A with a D tripping characteristic, 4-pole configuration (3P+N), and a 10 kA breaking capacity at 400 V AC. The D-curve tolerates high inrush currents without nuisance tripping while clearing faults up to 10 kA. The neutral pole is switched, and the unit is sealable for tamper-proof installations.
The 4 A D-curve rating protects circuits feeding inductive loads where the starting surge can be high. The 4-pole 3P+N design switches all three phases and the neutral. Terminal torque spec is 2.5–3.5 N·m. IP20 with connected conductors.