The Siemens 5SJ6110-6 is a 1-pole miniature circuit breaker from the SENTRON 5SJ6 family, rated 10 A with a B-curve tripping characteristic and a 6 kA breaking capacity per EN 60898 and IEC 60947-2. It snaps onto a DIN rail in any mounting position, occupying one modular width unit (18 mm wide, 76 mm deep, 90 mm tall).
Rated 240 V AC single-phase, with an insulation voltage of 440 V AC and a multi-phase maximum of 440 V AC. The 6 kA breaking capacity at 230/400 V per EN 60898 is the standard domestic and light commercial fault current rating — adequate for most distribution boards where the prospective short-circuit current at the main switch is below that threshold. The DC rating is 60 V, so it can also protect a 48 V DC control circuit or a small solar string, but verify polarity and arc extinction for DC use. Operational current is 10 A at AC. The mechanical service life is 20 000 switching cycles typical. Ambient temperature range is -40 °C to +75 °C, with periodic exposure to +55 °C and 95% humidity — wide enough for unheated enclosures in northern climates or hot attics. Touch protection is built in (IP20 with connected conductors).