The Yageo P3500SB TSPD DO214AA 320V 80A is a thyristor surge protection device used to protect electronic circuits from transient overvoltages. It offers both line transient overvoltages and line overvoltages protection, responding quickly and accurately to sudden changes in current flow. It has a peak repetitive off-state voltage of 320V and a peak on-state current of 80A. The device is designed to be easy to mount and is offered in through-hole or SMD packages. It is ideal for applications such as electronic circuit protection, power modules, measuring and control equipment, automotive electronics, and cooling systems.