The ABB SK1-11 1NA+1NK 1SAM201903R1001 is a brand new and original switch fuse link suitable for interior and exterior use. It features a Type A tripping characteristic, AC current type, and a voltage range of 201-250V. This current-limiting fuse has a maximum amperage of 400A and provides overload and surge protection. With features like changeover contact, mechanical interlock, and thermal overload protection, this DIN rail mount switch is ideal for branch circuit, industrial, and electronics applications. Its operation method is on/off, and it is compatible with various smart home systems.