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Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
What can I say besides COOL! No mater how careful you are blowing FETS is inevitable from time to time which is why it's always nice to have backups. Looks like your set for quite a while.
P.S. You should write you up your cnc laser rig on here, looks like a good build!
Registered Member #3272
Joined: Mon Oct 04 2010, 11:40PM
Location: Beaverton, OR
Posts: 101
teravolt wrote ...
Maybe a small test jig is in order. they may be in a can for a reason. That would be where I would start. A stiff 50-100v power source and a load resistor and a 20v power supply is all you need.
I have a igbt/mosfet tester that I built during my days working as a welder service tech. I hooked that in parallel with a 60v/10A CV/CC supply in CC mode and it looks like I can do basic load tests like that. But for real meaningful testing I might need something like a curve tracer.
Registered Member #3272
Joined: Mon Oct 04 2010, 11:40PM
Location: Beaverton, OR
Posts: 101
Marko wrote ...
Hi sir,
Just curious, are all the mosfets mostly the same manufacturer, or the allsorts?
Marko
They are all APT (MicroSemi) with date codes from anywhere from the late 90's to here in the past couple years. APT is in Bend, OR, which is a couple hour's drive from here in Central Oregon. I didnt even know there were semiconductor fabs there.
Registered Member #3272
Joined: Mon Oct 04 2010, 11:40PM
Location: Beaverton, OR
Posts: 101
Digging through I have not see any of them. There is the big SOT packages like the APT47M60J, 45M100J, 34M120J and TO-247 and bigger TO packages with numbers like APT28M120B2, APT8030LVFR, and 5010LVFR.
My friend is already blowing them up!
I do find it interesting the larger SOT-227 packages have less power dissipating capability than the same die in a TO package.
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So I got some mosfets...
