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Product Description:

Diode module, with 4 diodes, individually wired, diode type 1N 5408


PDF Technical Info

So how does a diode module or diode block work? 

For you to be able to understand how a diode module works, you first need to understand how a single diode actually works.

What is a diode?

A diode is a device that allows current to flow in only one direction. That means if you add a diode to an electrical circuit, the current can only flow in one direction.

For example, here the current can only flow from point 2 to point 1 but if it attempts to flow from point 1 to point 2, it will be blocked by the diode. Very simple, right?

What is a diode

As a matter of fact, this diode symbol also tells us the same thing. The arrow says the current can flow in one direction, meaning from point 2 to point 1, and if it attempts to flow in the other direction, it will be blocked. So the little line here is the block sign.

Diode Current Direction

Diode symbol

In the picture below, you see a symbol of a diode on the left and an actual diode on the right. 

Again, as you see, we have the little line on the top of the actual diode as well.

This is a simple indicator to let you know that current will be blocked if it attempts to flow from point 1 to 2.

But if it attempts to flow from point 2 to 1, the diode will let the current pass.

Diode symbol and actual diode

How does this diode module work?

Now getting back to our diode module, you see that we have four diodes inside this module.

We have four points or terminals on each side of this module.

Diode Module Terminals

There is one diode between each of these two terminals. That means we have a diode between terminal 1 and 2 and three other diodes for the rest of the terminals.

Diode Module Components

Now we think you already have a good idea about how this module works.

Yes, as you properly already guessed, this module only allows the current to pass from terminal 2 to 1, 4 to 3, 6 to 5, and 8 to 7.

That simply means if we add this module to an electrical circuit, the current can only flow from the bottom four terminals to the four terminals at the top.

And if the current tries to flow from the opposite direction, it will simply be blocked!

As you can see, this is something that is clearly stated by the four diode symbols on the module as well.

Diode Module Current Direction

Inside the diode module

If you take a closer look here, you can see the diodes inside the module here as well. As you can see, there is a line on each end of these diodes which shows that if the current attempts to flow from top to bottom direction, it will be blocked.

Diode Module Inside

So you use this diode module when you need the current to flow from only one direction.

If you have any questions regarding how to use this diode module or about diodes in general feel free to add them in the section below. We read each and every question and reply to it in less than 24 hours. :) 


Ask a Question
  • Does this module,(frame) usage also for other components like resistors,capacitors,coils,seperatly or mixed according to our circuit needs? And if not , refer to me an example of its real purpose,since it is a bit large for electronic circuits.

    Hi there, 

    No, this is a special module with four diodes. Configurations with other components are not offered. The diodes in this package are made for high-power applications, such as half and full-wave rectifiers, motor bleed back protection, over-voltage protection, etc.

    Hope this helps!

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