DC-rated miniature circuit breaker for 440 V rail protection
The Siemens 5SY5203-6CC12 is a 2-pole miniature circuit breaker from the 5SY5 series, rated for 440 V DC with a 10 kA breaking capacity and a B-curve trip characteristic at 3 A. The B-curve (3–5× In) suits resistive or lightly inductive DC loads where short inrush is not expected.