The Siemens 5SY6304-6CC is a SENTRON miniature circuit breaker — 3-pole, B-trip characteristic, rated 4 A at 400 V AC, 50/60 Hz. IP20 with connected conductors — finger-safe terminals but not washdown-rated. Combined top and bottom terminals simplify daisy-chaining busbars.
Deployment context — panel integration and environmental range
The 5SY6304-6CC covers a wide ambient span: -40 °C to 75 °C, with humidity derating above 55 °C (95% RH to 55 °C, then 55% to 70 °C, 35% to 75 °C). That makes it usable in cold storage, outdoor cabinets, or near ovens — but the humidity curve means you don't seal the enclosure tight in high-temp, high-moisture zones without a breather. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. That's enough for general industrial machinery but not heavy rotating plant — if the panel mounts on a compressor skid, verify the vibration profile against that spec.