There are two types of diodes are used as bypass diode in solar panels which are pn junction diode and schottky diode also known as schottky barrier diode with a wide range of current rating.
Schottky diode solar panel.
Schottky rectifiers feature low forward voltage drop offering higher efficiency and current density than traditional p n junction diodes.
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Schottky rectifiers are generally used in bypass diodes for monocrystalline silicon and polycrystalline photovoltaic solar panels.
Received item package was marked as 50 volts but the diodes are individually marked as 10sq045 which are 45 volt 10 amp diodes.
The schottky diode has lower forward voltage drop of 0 4v as compared to normal silicon pn junction diode which is 0 7v.
Heavy enough for about any voltage i will use and the price is right at 8 38 with free shipping.