The Siemens SENTRON 5SL4414-8 is a 4-pole miniature circuit breaker with a D tripping characteristic, rated 0.3 A at 400 V AC. That dual rating covers installations from residential distribution boards to industrial panel feeders.
Thermal derating and environmental limits
The 0.3 A rating holds at 30 °C ambient; at 40 °C it derates to 0.28 A, and at 55 °C to 0.26 A. If the panel runs warm — say, adjacent to a drive or transformer — use the 55 °C figure for sizing. The breaker is rated for any mounting position, which simplifies layout in crowded enclosures. Pollution degree 2 (non-conductive dust, occasional condensation) covers most clean industrial and residential environments.
Panel integration and compliance
It's sealable, halogen-free, silicon-free, and provides touch protection on the terminals.