What characteristic does a soldered link provide in an automatic sprinkler head?

A soldered link in an automatic sprinkler head is designed to have heat sensitivity. This characteristic is crucial because the link is typically made of a material that will melt at a specific temperature. When the area around the sprinkler head reaches this temperature, indicating a fire, the soldered link melts, releasing the water supply to extinguish or control the fire.

The functionality of a soldered link hinges on its ability to respond to heat, which allows for the proper activation of the sprinkler system during a fire event. This precise mechanism helps ensure that the sprinklers only activate when necessary, reducing water waste and ensuring effective fire suppression.