The Siemens SENTRON 5SL6140-8CC is a 1-pole miniature circuit breaker with a D tripping characteristic, rated 40 A at 30 °C and 230/400 V AC. At 40 °C ambient the continuous rating derates to 36.88 A, so a panel running warm needs to account for that headroom.
Deployment context
Mounting position is unrestricted, so it can go sideways or upside-down in a tight cabinet without derating the thermal trip.
