The 1N5402 is a power diode because of its high forward current and reverse voltage with a power dissipation of 6.25W.
Pin Configuration
Pin No.
Pin Name
The BAV99 is a Dual in Series SMD Diode package, meaning there will be two diodes connected in series inside a SMD package. The Diodes can be used for small signal high speed switching applications.
The 1N5817 is a Schottky diode with a low forward voltage drop and high switching speed. It is commonly used in high frequency applications like Inverters, DC-DC converters etc.
The 1N914 is a small signal diode which can handle low voltage and low current. The diode can switch at high speed and hence normal used in switching applications and not in rectifier applications.