electronic buffs Q.

[Lee321]

i need a diode to carry 20amps. how?

possibly it becomes called something else at this current level?

12v dc btw

ray

 

[septiclecky]

i need a diode to carry 20amps. how?possibly it becomes called something else at this current level?

12v dc btw

ray

It comes under the heading off a power diode you can get them for very large dc rectifiers

 

[Andy™]

1N5401 are rated to 3A, so you could bunch 7 of these together

or you could do as suggested above and get a 20A rectifier

 

[ProDave]

Don't rely on putting several diodes in parallel. Each will have a very slightly different forward volt drop so they won't share the current equally.

You want something like this http://www.maplin.co.uk/Module.aspx?moduleno=46429 rated at 30A, it will need to be mounted on a heat skink.

 

[mikep]

Might be worth fitting a stud diode with heat sink RS will have these ??

 

[PBC_1966]

If this is for a power supply of some sort where you are using a C.T. transformer and full-wave rectification, you can get a dual diode combined into a single package for easy mounting on a heatsink. For example:

http://www.rapidonline.com/sku/Electronic-Components/Discrete-Semiconductors/Rectifier-Diodes/High-power-dual-Schottky-rectifiers/76074/47-3650