Here's some information about it:

Current and Voltage Rating: The "1A 1000V" designation indicates that the diode can handle a maximum average forward current of 1 ampere (hence the "1A") and a maximum reverse voltage of 1000 volts (hence the "1000V").

Rectification: Like other rectifier diodes, the FR107 is primarily used for rectification, converting alternating current (AC) into direct current (DC) in electronic circuits.

Ultra-Fast Recovery Time: The "ultra-fast recovery" characteristic means that the diode has a very short reverse recovery time. This feature allows it to switch off rapidly when the polarity of the voltage across the diode is reversed, making it suitable for high-frequency and high-efficiency applications.

Low Forward Voltage Drop: The forward voltage drop of the FR107 diode is typically low, which reduces power dissipation and improves efficiency in circuits where it is used.

Package Type: The FR107 diode typically comes in an axial package, which is a cylindrical package with leads on each end. This package type allows for easy through-hole mounting on a printed circuit board.