Testing a Mosfet

[vdi_nenna]

Testing a Mosfet to see if it broken. What do you guys think of this method?

Testing a MosFet

I tested some that I pulled from "bad" builds and found some broken and some not for both N-Ch and P-ch FETs. Also tested unused FETs.

Used Bad
4- IRFP9140
1- IRFP140N

Used Good
3- IRFP140N

New Unused
4- IRFP048N (4 out of 4 good)

8- IRFP140A (8 out of 8 good)

4- IRF9610 (4 out of 4 BAD!) The resistance did not move upward.

 

[Nelson Pass]

The 9610 is a P channel. try reversing the multimeter leads.

 

[vdi_nenna]

Cool!

 

[vdi_nenna]

So is the IRFP9140. Better go back and check them again.