For higher power circuits however, their current handling of 1 amp is often too small. For these beefier projects, the 1NX series diodes are the way to go. They can handle up to 3 amps of current in a reasonable small DO package. Since the price and size of the diodes in this series 1N, 1N, … are all the same, we only carry the volt version — 1N
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PN diodes can be much more complex than a simple 2D model demonstrated in all the theoretical examples Can you provide any reference for your answer? The 1n diodes are a lot bulkier than the 1n if I remember correctly Once they do this they can sell the better performing devices for more money. My guess is 2 pools, from which 7 bins were derived.
This guess is based on the fact that the data for Typical Junction Capacitance in the datasheet has two regions. The difference between these diodes is mainly their reverse breakdown voltage. There are many more parameters which differ; part of the differences are mentioned in the datasheet like the aforementioned junction capacitance , others are not.
These properties must affect almost any electrical parameter of the diode. Manufacturers tend to represent these diodes as having exactly the same properties because the very fine differences are not important for main areas of employment of these diodes.
There are applications which require more precision though. In these applications you might want to be able to choose a suitable breakdown voltage. My guess is that years ago, when these diodes were just introduced and the semiconductor processes were not mature, the differences between different diodes were more pronounce.
Summary: If the price is the same and you use these diodes in "standard" applications like low frequency rectification , you may use any of them as long as it satisfies your requirements for reverse breakdown voltage. If you are planning to use them for something more sensitive, you might want to test them all to see which one suites better.
The arrow of the circuit symbol shows the direction in which the current can flow. Diodes are the electrical version of a valve and early diodes were actually called valves. Types of diodes Ordinary diodes can be split into two types: Signal diodes which pass small currents of mA or less. Rectifier diodes which can pass larger currents.
1N5401 - 1N5401 100V 3A General Purpose Diode