Fusible links are not rated in amps like fuses because each installation is unique & designed to meet specific circuit protection. Opens circuit when extreme overload occurs. Used to repair factory installed fusible links. Original length & gauge must match exactly. Fusible link should be 4 gauges smaller than circuit. CAUTION: DO NOT substitute ordinary wire for fusible links. DO NOT replace fuses with fusible link wire. Highly technical calculations are required to determine the correct length and gauge of fusible links.