Equivalent MOSFET for AUIRLR2908

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    Equivalent Mosfet
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Discussion Overview

The discussion revolves around finding a suitable replacement for the AUIRLR2908 MOSFET, focusing on the key parameters necessary for selecting an equivalent part. The context includes considerations for automotive applications and the importance of specific electrical characteristics.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • The original poster (OP) seeks advice on key parameters to consider when finding a drop-in equivalent for the AUIRLR2908 MOSFET.
  • Some participants suggest that breakdown voltage, Imax, and Rds-on are critical parameters for selection.
  • One participant points out that the OP's attached data sheet is for a different part, causing confusion about the replacement options.
  • Another participant proposes the FDD5690 as a potential equivalent, noting that its specifications are similar to those of the AUIRLR2908.
  • There is a mention of the AECQ101 qualification, indicating the need for automotive-grade components in relevant applications.

Areas of Agreement / Disagreement

Participants generally agree on the importance of specific parameters like breakdown voltage, Imax, and Rds-on for selecting a replacement MOSFET. However, there is some confusion regarding the data sheet provided by the OP, and the discussion includes multiple suggestions for equivalent parts without a clear consensus on the best option.

Contextual Notes

The discussion does not resolve the uncertainty regarding the suitability of the suggested replacements, nor does it clarify the implications of automotive qualifications on the selection process.

nlis12
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TL;DR
Trying to identify key parametrics when trying to find an equivalent MOSFET
I am currently in need of a MOSFET to replace the AUIRLR2908 I am currently using.
This power MOSFET is used in enhancement mode for switching.
The data sheet is attached for reference.

What are some of the key parametrics I should be concerned with when trying to find a drop in equivalent?

Thank you in advance.
 

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Why can't you just use this part?
The data sheet you have attached is for a different part. Now I'm confused.
 
Last edited:
I think https://www.digikey.com/product-detail/en/on-semiconductor/FDD5690/FDD5690CT-ND/1626197 should work. Breakdown voltage, Imax, and Rds-on are all about the same. If not, Digi-Key has many other to choose from
 
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hutchphd said:
Why can't you just use this part?
The data sheet you have attached is for a different part. Now I'm confused.

This one is the actual part in question.
 

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phyzguy said:
I think https://www.digikey.com/product-detail/en/on-semiconductor/FDD5690/FDD5690CT-ND/1626197 should work. Breakdown voltage, Imax, and Rds-on are all about the same. If not, Digi-Key has many other to choose from

Thank you!
So Breakdown voltage, IMax and Rds-on are the key parameters I should look for?
 
nlis12 said:
Thank you!
So Breakdown voltage, IMax and Rds-on are the key parameters I should look for?
Yes, I think those are the most important. If it is just functioning as a switch, those are what matter. If you are doing something more complex, then other parameters may matter.
 
The OP's original device is an AECQ101 part, kind of need to keep the automotive qualification part if going into an automotive application.

I'm assuming this is for a personal project and not work related?
 

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