Fastening methods for heatsinking PSU components.
Fastening methods for heatsinking PSU components.
(OP)
Hello Guys,
I am a Mech Engineer designing an enclosure for a Power Supply PCB.
On the Layout, there are couple of components (See below)
those require heat sinking.
IC Bridge rectifier
MOSFET N Channel
I am using a common strip of metal to heat sink them. Later the complete assembly will be potted.
Question : For fastening these components to the metal plate, is it mandatory to use s screw? Is it alright if we revit them? Or use a spring steel clip? Will UL have any issues if I use these kind of fastening methods.
Thanks In advance.
BT
I am a Mech Engineer designing an enclosure for a Power Supply PCB.
On the Layout, there are couple of components (See below)
those require heat sinking.
IC Bridge rectifier
MOSFET N Channel
I am using a common strip of metal to heat sink them. Later the complete assembly will be potted.
Question : For fastening these components to the metal plate, is it mandatory to use s screw? Is it alright if we revit them? Or use a spring steel clip? Will UL have any issues if I use these kind of fastening methods.
Thanks In advance.
BT





RE: Fastening methods for heatsinking PSU components.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Fastening methods for heatsinking PSU components.
If the package is something like a TO-220 then as long as they are secure (screw, rivet, clip) and don't loosen up over temperature cycles there should be no issues. Others may chime in with more specifics.
John D
RE: Fastening methods for heatsinking PSU components.
I tried to lookup for clips on mcmaster, the results were not relavent.
Thanks
RE: Fastening methods for heatsinking PSU components.
By using this, I need not worry about using insulation material while fastening.
Another alternative I thought about was to laminate the metal heatsink. This saves the time we spend on cutting the small pieces of thermal pads and storing them.
RE: Fastening methods for heatsinking PSU components.
http://ww
This movie about using them sez it ALL.
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They work very well. Frankly, they're superior to all alternatives if the configuration allows them.
You can always go to someone like Berquist and have them diecut you a bunch of thermal isolators with contact adhesive on one side.(If they don't stock the size you need.)
Keith Cress
kcress - http://www.flaminsystems.com
RE: Fastening methods for heatsinking PSU components.