Help Me Find A Replacement MOSFET

[mockingbird]

Hello,

I have an MSI P45-Neo3 with a blown Niko Semiconductor, model P45N02LDG, with some guts spewed on a nearby FPCAP. Thankfully, the failure caused the MOSFET to seperate from the tab, so I will just have to desolder the leads.

I cannot find an exact match to it. From my limited knowledge of these things, I ascertained that it's form and package type is TO-252 DPAK, two-leads one tab.

Specifications:
VBRDSS:25
RDS:20 milliohms
LD:45A

I tried looking at some ST Microelectronics equivalents on Digikey, but all these numbers and abstract electrical specifications are enough to confuse anyone.

Can someone lend a hand please?

[mockingbird]

Re: Help Me Find A Replacement MOSFET

I found something nearly equivalent:

ON SEMI NTD40N03R, but the "On Resistance RDS" is only 12 milliohms instead of the Niko's 20 milliohms. Is this a suitable replacement?

[kikkoman]

Re: Help Me Find A Replacement MOSFET

i'd say you're good to go.

a lower Rds doesn't matter at all (it should even lower losses a bit).
the other specs (threshold Vgs, rise time, Qgs, PD) are fine too.

make sure you get that thing soldered down well and hope the rest of the circuit is undamaged.