Lostfollicles
Newbie level 2
Hi
I have a failed MDF4N65B 4 amp mosfet in a SMPS powering a Mackie ProFX12 v2 audio mixer that seemed to fail when there was a power cut even though the SMPS looks like it has more than adequate mains spike protection and no other damaged components that I can tell/see, all caps look good but will test before new mosfet install, however I suspect the device is under rated for it's purpose.
My question is: Should I use the same 4 amp mosfet and adapt better cooling or upgrade it if possible with the MDF7N65B which is a 7 amp device?
If the 7 amp mosfet could be used as an upgrade would the running temperature of the 7 amp mosfet be lower than the 4 amp mosfet? The reason I ask is that the mixer has to work in higher temperatures than normal here in Spain so it would benefit from a lower temperature device.
From the specs of the 7 amp mosfet it looks very similar apart from the turn on and turn off times or am I missing the bigger picture here?
I would appreciate any help and thank you in advance!
Please see attached PDF's
I have a failed MDF4N65B 4 amp mosfet in a SMPS powering a Mackie ProFX12 v2 audio mixer that seemed to fail when there was a power cut even though the SMPS looks like it has more than adequate mains spike protection and no other damaged components that I can tell/see, all caps look good but will test before new mosfet install, however I suspect the device is under rated for it's purpose.
My question is: Should I use the same 4 amp mosfet and adapt better cooling or upgrade it if possible with the MDF7N65B which is a 7 amp device?
If the 7 amp mosfet could be used as an upgrade would the running temperature of the 7 amp mosfet be lower than the 4 amp mosfet? The reason I ask is that the mixer has to work in higher temperatures than normal here in Spain so it would benefit from a lower temperature device.
From the specs of the 7 amp mosfet it looks very similar apart from the turn on and turn off times or am I missing the bigger picture here?
I would appreciate any help and thank you in advance!
Please see attached PDF's