The P3100SB with Thyristor Surge Protection Devices TSPD DO214AA 275V 80A is a thyristor surge protection device (TSPD) manufactured by Yageo. It is designed to protect electronic circuits from over-voltage or transient surges that occur in the power supply line. It is a small, surface-mount component that is rated for a maximum voltage of 275V and can handle a maximum current of 80A. It comes in a DO214AA package and can be used in a wide range of applications that require transient voltage spike protection.