Diode: 1N4007 vs 1N4001

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Diode: 1N4007 vs 1N4001

Postby robosang » Mon Jan 09, 2012 7:08 pm

Hi guy, might be a stupid question, but want to verify.

I think those uses diode should have seen 1N400X, the X can be number from 1 to 7. My question, which one is better? 4001 is better or 4007 and what is the different? :mrgreen:

Thanks in advance.
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Re: Diode: 1N4007 vs 1N4001

Postby ABSF » Mon Jan 09, 2012 7:17 pm

robosang WROTE:Hi guy, might be a stupid question, but want to verify.

I think those uses diode should have seen 1N400X, the X can be number from 1 to 7. My question, which one is better? 4001 is better or 4007 and what is the different? :mrgreen:

Thanks in advance.


1N4007 is better, it can withstand 1000V whereas 1N4001 is only 50V.

Allen
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Re: Diode: 1N4007 vs 1N4001

Postby robosang » Mon Jan 09, 2012 8:50 pm

ABSF WROTE:1N4007 is better, it can withstand 1000V whereas 1N4001 is only 50V.

Allen


Thanks Allen. If that is the case, why are some still using 1N4001 or lower number than 7 since 1N4007 have better specification in all aspect? The price seem to be same if we are talking about retails :mrgreen:

No drawback at all if I use 1N4007?
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Re: Diode: 1N4007 vs 1N4001

Postby ABSF » Mon Jan 09, 2012 9:14 pm

Many years ago there was a price difference between and 1N4001 and 1N4007. But due to mass production, the price gap was closing. If I go to my local spare part store I can still get 1N4004 and they are mostly old stocks. But if I buy mail-order I can only get 1N4007 like here:

http://www.escol.com.my/Transistors.html#Diode,%20rectifier,%20bridge

1N5408 was also the same. Many years ago I saw people using 1N5401 but today most people just buy 1N5408. Did you open up the AC adaptor and check what rectifier they used inside ?

robosang WROTE:why are some still using 1N4001 or lower number than 7 since 1N4007 have better specification in all aspect?

I dont know :? Maybe some designers dont want to over-spec too much! If you have an output of DC 12V with the secondary of the transformer at 9V ac, 1N4001 can easily do a good job, then why bother with a 1000V diode.....Or maybe if you buy 1N4001 in bulk, say 100K pieces, then may be there is a difference in price than if you buy the same amount of 1N4007. :mrgreen:

Allen
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Re: Diode: 1N4007 vs 1N4001

Postby robosang » Tue Jan 10, 2012 12:38 pm

Yup, I guess the same reason too....
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