The Optifuse TSD-20A is an industrial-grade glass-encased time-lag fuse with a 20A rating for 250VAC (volts AC) applications. The fuse measures 5x20mm in size and is made of brass with a bulk packaging. The TSD-20A has low let-through current and high temperature durability, making it suitable for a variety of industrial applications, such as solar panel systems, power distribution, lighting equipment, and HVAC systems. For protection, the Optifuse TSD-20A is UL Listed, CSA Certified, and RoHS Compliant.