DC-rated interrupting capacity
The 5SL5801-7: Rated 6 kA at 110 V DC, this breaker is sized for DC branch circuits where the prospective fault current stays within that limit. The C-curve (5–10× In) means it will hold through moderate inrush from small transformers or capacitive loads without nuisance tripping.
Panel integration
Snap-on mounting to a 35 mm DIN rail per EN 60715. The 1 MW (18 mm) width per pole means a 2-pole unit occupies 36 mm of rail space — factor that into your enclosure fill calculations. Spring-cage terminals accept 0.2–2.5 mm² solid or ferruled stranded conductors.