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KeradSnake

DFI P55 T3eH9 fried MOSFET replacement + How to understand the info written on MOSFET

The MDU names are the important part, all the specified specifications (thats fun to say) are directly related to that name.

The second line is not relevant.

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Posted · Original PosterOP

DFI P55 T3eH9 MOSFET fried when i tried to turn it on. Luckily it didn't kill the CPU or other components. Two MOSFET fried, the rest are assumed short, and there were no leaked/ exploded caps. I want to replace the MOSFET chips on it. But, there's something that made me a little bit confused: info on the MOSFET chips

When i searched the MOSFET, it was found that it came from Magnachip. MDU2657 and MDU2655. But, what made me confused is the AJ217AGG and AF218AGG

1. What does AJ217AGG and AF218AGG means in Magnachip MOSFET?

2. I found lots of MDU2657 and MDU2655 chips on Ebay, but unlike mine. Does this AF218/ AJ217 whatever really matters? Like, they're must the same if you want to replace the MOSFET yourself? So far i only found MDU2657-DD047EGF and MDU2655-EC147DGG. There were NONE of MDU2657-AF218AGG and MDU2655-AJ217AGG chips

Image of fried MOSFET (picture taken before the red marked MOSFET fried)

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Posted · Best Answer

The MDU names are the important part, all the specified specifications (thats fun to say) are directly related to that name.

The second line is not relevant.


thou shalt not yeeteth

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Posted · Original PosterOP
1 minute ago, Genwyn said:

The MDU names are the important part, all the specified specifications (thats fun to say) are directly related to that name.

The second line is not relevant.

So, the AF218AGG/ AJ217AGG is just like a S/N of the MOSFET?

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Just now, KeradSnake said:

So, the AF218AGG/ AJ217AGG is just like a S/N of the MOSFET?

Its not disclosed anywhere i can see what it directly relates to, my guess is theyre in-house production codes relating to their batch, testing, machine they were produced on, etc

I used to work in a CNC shop and we had a lot of parts that were marked like that.


thou shalt not yeeteth

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