The 021802.5MXP is a safety fuse cartridge manufactured by Littelfuse. It is designed as a fail-safe device that helps to protect electrical circuits against overload and short circuit conditions. The fuse is rated for 2.5 A, 250 V AC/DC electricity, and is designed to fit into a 5 mm x 20 mm glass holder. Once the specified current rating is exceeded, the fuse will blow and open the circuit, preventing further damage. The 021802.5MXP is commonly used in consumer and industrial applications, such as lighting, motors, hot-water heaters, and appliances.