The Siemens 5SJ4106-8HG41 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC.
Vibration resistance of 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz covers most rotating machinery environments. Sealable terminals and halogen-free / silicon-free construction suit it for food-and-bev or semiconductor fab applications where contamination or outgassing is a concern.
The 15 kA rating under IEC 60947-2 gives additional headroom for high-fault installations. Insulation voltage Ui is 440 V AC. The part is suitable for EMC environment B (immunity not applicable — typical for passive protective devices).