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I'm trying to repair the logic board of an LCD monitor that died while giving off a burned smell.

It seems that an LCD driver chip and a MOSFET (I think) burned out. The chip was easy to identify (HV9982) and order, but I can't unambiguously identify and find a replacement for the other part.

It is labeled "540N 88KFG" and I think its form factor is TO-252 / DPAK. Below is a photo, there are three of them in the middle of the picture.

A related question is what characteristics I have to make sure to match if I can't buy an exact replacement. Searching around for "540N" MOSFET, I found some in other packages whose main data points were

  • 100V source-drain voltage
  • 33A current rating.

If those do indeed apply to this component as well, what else needs to match in a replacement?

Update: After looking around a bit longer it appears that IRFR3410PbF might be a reasonable replacement.

540N 88KFG MOSFET

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  • \$\begingroup\$ looks like some smps there, I would say gate capacitance and rdson would play a role too \$\endgroup\$ – PlasmaHH Apr 22 '15 at 22:06
  • \$\begingroup\$ Smells like a IRF540, but "N" usually means some sort of TO-220. \$\endgroup\$ – Ignacio Vazquez-Abrams Apr 22 '15 at 22:52
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    \$\begingroup\$ THIS IS NOT A REPAIR QUESTION, IT IS PART IDENTIFICATION FFS \$\endgroup\$ – Passerby Apr 22 '15 at 23:52
  • \$\begingroup\$ @Passerby, the very first words of the title I chose are "Identify/substitute", and the tags I applied are "identification" and "substitution". Can you elaborate on what else you'd like to see? \$\endgroup\$ – Marc Liyanage Apr 23 '15 at 0:00
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    \$\begingroup\$ @IgnacioVazquez-Abrams Chinese often put part numbers that are familiar into different packages than the original- eg. 1N5819 in MELF rather than DO-41, MJE13003 in TO-92 rather than TO-225 etc. \$\endgroup\$ – Spehro Pefhany Oct 10 '15 at 4:03
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Might be a Ceu540n, or similar 'clone' of the IRF540.

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