The Siemens 5SL4514-8 is a SENTRON miniature circuit breaker in the 5SL4 design, rated 0.3 A at 230 V AC with a D tripping characteristic and a 10 kA breaking capacity per EN 60898 and IEC 60947-2. It's a 1P+N (2-pole) unit that switches the neutral conductor — a detail that matters when you need full isolation on a single-phase residential or light-commercial feeder. At 0.3 A it's a low-current branch protector, not a main feeder breaker. The 10 kA SCCR covers most domestic and light-industrial fault levels; the 230 V AC rating suits standard single-phase networks.
Panel fit and wiring constraints
The 5SL4514-8 occupies 2 width units (36 mm) on a DIN rail, with an installation depth of 70 mm and overall depth of 76 mm — standard for the 5SL family. Terminals accept solid or stranded copper from 0.75 to 25 mm²; tightening torque is 2.5 to 3 N·m. The sealable feature (padlockable toggle) allows lockout/tagout on the branch circuit without additional hardware.