The Littelfuse JLS040 Class J Fuse 40AMP is a reliable overcurrent protection device designed for demanding electrical applications in HVAC systems. It safeguards equipment by interrupting excessive current flow, preventing damage to components such as compressors, fan motors, control panels, and power distribution modules. Visit The Website: https://www.partshnc.com/jls040-littel... https://www.partshnc.com/jls040-littelfuse-40amp-fuse