The Siemens SENTRON 5SJ4145-8HG41 is a 1-pole miniature circuit breaker with a D tripping characteristic, rated 45 A at 400 V AC. The 10 kA breaking capacity per EN 60898 covers most commercial and light industrial panel fault levels; the 15 kA rating per IEC 60947-2 gives additional headroom for industrial distribution boards where the prospective short-circuit current is higher. Mounts on standard DIN rail, occupies one width unit (18 mm).
Rated for ambient temperatures from -25 to +55 °C, storage from -40 to +75 °C. Protection class IP20 with connected conductors; Vibration resistance tested at 50 m/s² over 25–150 Hz and 60 m/s² at 35 Hz for 4 seconds, covering typical machine-mounted panel vibration. Sealable for lockout/tagout applications. Overvoltage category III, suitable for fixed-installation distribution boards. The product carries designations per DIN EN 61346-2 and DIN EN 81346-2 (function code F).