Diotec 1n500x series standard 3a axial rectifier diodes diotec 1 n 5403 this rectifier diode is from a range of the most popular standard 3a axial rectifier diodes and has a vrrm of 300v a fast switching time makes this device suitable for a wide range of applications such as rectification and high current handling in switch mode power supplies diotec 1n5403 rectifier diode 3a 300v