The ABB RD3 2CSJ201001R0002 is a brand new and original switch-type fuse designed for interior use. It features overload and surge protection, as well as a residual current monitor and pilot light. With a maximum amperage of 400A and a voltage range of 201-250V, this fuse is suitable for various applications such as branch circuits, industrial use, and electronics. It is compatible with smart home systems such as Universal, Ring, and ADT Pulse, and has a DIN rail mounting style for easy installation. The ABB RD3 fuse is a reliable and efficient option for protecting electrical circuits in a range of settings.