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I am really confused about this topic. Wheather it's ok to use duplicate MOSFETs or not.

Say for example my application requires to handle upto 20 amperes of motor current.

  • Is it ok to use 100A or even more ampere of duplicate or Chinese MOSFETs.
  • Or it's good to use only original MOSFET even with lower current specification.

Which one is better, and how can we identify whether a MOSFET is original or duplicate. Because duplicate MOSFETs will also work same like the original one, right?

JRE
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Bud
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    "Is it ok to use a 100 meter long rope to tie an elephant?" That kind of depends on how thick the rope is, yeah? So how does this question make any sense without a specific part in mind? There will be a maximum current spec in the datasheet and that's all that matter. – Lundin Jun 16 '20 at 11:38
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    What are "Chinese MOSFETs"? What does the datasheets say, how does the "duplicate's" parameters compare to the original MOSFET's parameters? Can the duplicate's datasheet be trusted? Because duplicate MOSFETs will also work same like the original one right? That depends on who you ask. – Bimpelrekkie Jun 16 '20 at 11:41
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    Don't use fake parts. In doing so you encourage a fake industry. – Andy aka Jun 16 '20 at 11:41
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    What to check for when buying an electronic component or module. – Andy aka Jun 16 '20 at 11:43
  • Actually what I am trying to say is, some seller sells a MOSFET (say stp80nf70) for 30INR whereas some other seller sells for 150inr. So what I consider was 30inr was a duplicate and 150inr was a original one. Am I wrong? Does any other way to identify or to confirm duplicate mosfet. – Bud Jun 17 '20 at 11:22

1 Answers1

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A FET is a FET. A FET has more parameters than just maximum drain-source current. If all parameters are acceptable for your case, you can use it.

It is another question, whether you trust the datasheet/manufacturer or not. If a product does not fulfill its specification, than legal actions are possible against them.

Horror Vacui
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