The Siemens 5SL4308-6 is a SENTRON miniature circuit breaker, 3-pole, B-curve, rated 8 A at 400 V AC, with a 10 kA breaking capacity per EN 60898 and IEC 60947-2. Rated 8 A at 30 °C; derated to 7.39 A at 40 °C, 7.04 A at 45 °C, and 6.37 A at 55 °C — the thermal derating curve must be applied when the breaker is installed in a warm enclosure.
Occupies 3 modular width units (54 mm) on a DIN rail; depth is 76 mm, height 90 mm, installation depth 70 mm.
Halogen-free and silicon-free construction, overvoltage category III, degree of pollution 2 — compliant with the material restrictions and clearance/creepage requirements for fixed-installation switchgear.