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Alternative for IRFP240/250/260 in TO-220 package
prasimix:
I'm looking for n-ch MOSFET with SOA similar to IRFP240/250/260 (TO-247) but in TO-220 package. I don't need it as a switch but to work in linear region as pass/series voltage regulator that has to step down no more then 5 V. What you would recommend?
Kleinstein:
One could use some higher voltage MOSFETs, especially old type. The IRF840 is at least in the Fairchild version specified with power limited SOA.
The permissable power may still be a little lower than for the TO247 case - just a question of the case size.
prasimix:
Thanks Kleinstein, the total power dissipation should not exceed 15 W, and thermal control will be implemented coupled with forced cooling using fan.
Kleinstein:
For so little power, one could get away with a smaller MOSFET like IRR820.
If in doubt Infineon FETs are a good choice - the transistors may not be better, but the data-sheets usually have a reasonable SOA curve and not a fake one ignoring the thermal instability.
Vovk_Z:
--- Quote from: prasimix on March 13, 2020, 11:56:10 am ---Thanks Kleinstein, the total power dissipation should not exceed 15 W
--- End quote ---
There is definitely no need in TO247 case for 15W dissipation. A lot of TO220 case mosfets will do.
For example, popular low voltage devices are IRF3205, IRF3206 etc.
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