What the 6kA breaking capacity and D-curve mean for your panel
The Siemens 5SL6108-8CC is a 1-pole miniature circuit breaker rated 230/400 V with a 6kA breaking capacity and a D-curve trip characteristic at 8A. The 6kA figure means it can safely interrupt a fault current up to 6,000 A at the rated voltage without welding contacts or cascading failure upstream — that is the standard residential and light-commercial fault level in many European and Asian installations. The D-curve (10–20× In magnetic trip) is sized for loads with high inrush, such as small motors, transformers, or solenoid valves, where a B or C curve would nuisance-trip on startup.
Sourcing and fit for the BOM line
The 5SL6108-8CC snaps onto standard DIN rail in distribution boards or sub-panels. The 1-pole, 8A, D-curve rating is a specific coordination point — verify the upstream selectivity and downstream load inrush before freezing the BOM. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.