What happens to a fusible link during a fire?

A fusible link is a crucial safety device used in HVAC systems and other applications, primarily functioning as a fire safety mechanism. During a fire, the temperature rises significantly. A fusible link is designed to have a specific melting point, and when that temperature is reached, the link will melt. This melting action causes a mechanical movement that can trigger other safety functions, such as shutting down equipment or opening dampers to reduce the spread of smoke and heat.

The design of a fusible link ensures that it responds reliably to elevated temperatures, making it an essential component in preventing fire damage and ensuring the safety of the occupants in a building. The melting of the fusible link is a straightforward and effective way to activate fire safety measures, confirming its role as a vital element in fire prevention systems.