High Voltage Forum

General electronics => Electronic Circuits => Topic started by: oneKone on April 30, 2019, 08:16:20 AM

Title: Differences with AliExpress irfp460
Post by: oneKone on April 30, 2019, 08:16:20 AM
In my absence form drsstc I've been getting into standard sstc and flyback drivers. This lead me to try different vendors on AliExpress for MOSFETs.  So far I've tried 3 different vendors with mixed results. All tests are 20v at the gate.
Type 1: tested upto 1.7kw (dual h-bridge), 1kw dual half bridge
Type 2: failed at 1kw dual half bride. Smaller die size is the suspect
Type 3: completely useless, appears to have smaller package in silicon.

Pictures are in order type 1-3





(ATM this post may seem fragmented, will update tonight)
Title: Re: Differences with AliExpress irfp460
Post by: Mads Barnkob on May 02, 2019, 10:01:14 PM
How did the packages, writing on them, etc. compare to the official specifications of this from the original manufacturers? If you checked that of-cause :)

Is it possible to get your money back from aliexpress when you discover something like this, where it obviously is fakes?

Was it from 3 different sellers? Or can you also risk getting both good and bad ones from same sellers?
Title: Re: Differences with AliExpress irfp460
Post by: oneKone on May 03, 2019, 01:32:18 AM
The external markings are different from one another but I am unsure how they compare to an original 460, I'll upload some pictures tonight.

It is possible to get money back, if you supply sufficient evidence, but they were so cheap it's not worth my time emailing back and forward.

The 3 samples have been from 3 different sellers, I can post the sellers correspondence to the samples I have.
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