The Siemens SENTRON 5SL4150-7RC is a 1-pole miniature circuit breaker with a C tripping characteristic, rated at 50 A and a 10 kA breaking capacity according to EN 60898. It occupies a single modular width (18 mm) on a DIN rail, making it a direct fit for standard residential and infrastructure distribution boards. The C-curve means it tolerates moderate inrush currents — typically 5 to 10 times the rated current — before the magnetic trip activates. This suits it for circuits with inductive loads like small motors, fluorescent lighting banks, or transformer-fed equipment where a B-curve would nuisance-trip on startup. Rated for single-phase operation up to 250 V AC and multi-phase operation up to 440 V AC at 50/60 Hz, the 5SL4150-7RC covers the common 240/415 V split used in European-style panelboards. The 10 kA breaking capacity at 415 V AC is the standard domestic and light commercial SCCR level.
Mounts on a standard 35 mm DIN rail. The 18 mm width (1 MW) and 76 mm depth fit within the same cutout footprint as any other SENTRON 1-pole MCB. It accepts supplementary devices (auxiliary switches, shunt trips, undervoltage releases) for remote status or emergency-off integration. IP20 with connected conductors — suitable for enclosure interiors where live parts are behind a door. The sealable design allows panel builders to lock the toggle position after commissioning. Rated for a wide ambient range of -40 °C to 75 °C, so it can be installed in unconditioned outdoor enclosures or near heat-generating equipment without derating concerns.