The 1-2103212-1 is a plug assembly manual service disconnect designed for high-current circuit protection. This component integrates a 350A fuse and is constructed from PA66-GF33 material. It features a black inner lever and has a part weight of 525.60 grams. The assembly is designed to be non-serviceable, meaning the entire unit must be replaced if the fuse is blown. It provides a critical safety function, often used in electric vehicle (EV) battery packs to allow for safe disconnection of high-voltage systems.