All About Fusible Links | Allied University
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All About Fusible Links

What is a Fusible Link?

A Fusible link is a short, low-voltage wire that acts as a fuse in a vehicle's wiring harness. Fusible links provide circuit protection in the wiring of a vehicle in the case of a short circuit or voltage spike. These insulated wires may be used in applications in which an automotive fuse is unsuitable.

Fusible Link Construction

Fusible links are short pieces of wire. Our Fusible Links feature stranded bare copper conductors and Hypalon rubber insulation. We carry fusible links in gauge sizes 22 AWG to 8 AWG. We also offer multiple colors for the insulation, including Orange/Rust, Grey, Blue, Black, or Red.

Fusible Link Specifications

Since fusible links are classified as low voltage wiring, they should not be used in applications that exceed 50V. Allied Wire and Cable's fusible links have a maximum temperature of 150°C for continuous use. Our fusible likes also meet the SAE J-1128 Type HTS specification.

What does a Fusible Link do?

Fusible links are suitable for use as an inline circuit fuse in a vehicle's wiring harness. They protect larger wires from voltage spikes by adding a new circuit breaker that bypasses a vehicle's fuse box. They also prevent fire in the case of extreme current overload. If this were to happen, the conductor in the link will melt and the insulation will contain any sparks or flame that may occur. However, a replacement fusible link will be needed after it has blown.

Allied Wire and Cable offers 8 to 22 gauge fusible links as part of our extensive stock of automotive wire. Our stock includes brake cables, car speaker wire, trailer cable, battery cable, and primary wire. Our Battery Cable options include SGT, SGX, and STX wire. We carry both PVC and cross-linked primary wires, including GPT and TXL Wire. Do you have more questions about Fusible Links? Read our Automotive Cable FAQs or contact us today!