The fuse used for the protection of CDPV1-20 solar photovoltaic system is suitable for the distribution lines with a rated voltage not exceeding DC1000V, a rated current not exceeding 20A, and a rated short-circuit capacity not exceeding 20kA for short-circuit overload protection, and it is mainly used in solar photovoltaic combiner boxes as short circuit and overload protection for solar photovoltaic power generation devices and other semiconductor equipment.