The Ferraz Shawmut TRS15R fuse is a type of low voltage power fuse used to protect electrical equipment and circuits. It is a current-limiting fuse that is designed to quickly open the circuit in the event of an overcurrent or short-circuit condition, helping to prevent damage to the equipment and the surrounding environment. The TRS15R fuse is rated for 15 amps and has a voltage rating of 600 volts AC or DC. It is commonly used in industrial, commercial, and residential electrical systems.