hello everybody,
i wonder if you can use this as a heatsink ?
i would like to use 6cm long (2cm*2cm) for a BD139-16
would it work ?
how much K/w would it have?
i know it is not black, but i guess it is better then the average small heatsinks you can buy
thank guys
i wonder if you can use this as a heatsink ?
i would like to use 6cm long (2cm*2cm) for a BD139-16
An externally hosted image should be here but it was not working when we last tested it.
would it work ?
how much K/w would it have?
i know it is not black, but i guess it is better then the average small heatsinks you can buy
thank guys
I will give it a shot...
Capacity is greatly determined by surface area.
If you rely on natural convection, then vertical surface area is what counts.
Using a tube profile, one of the two vertical surface areas is somewhat removed from the heat source. You will be better off using just a piece of 3-6mm think aluminum sheet/plate.
A rough guess for a 6 cm length of that tube profile is 15-20 W/K, if you a are dissipating around 10 W. (The thermal resistance goes up as you dissipate less).
Note that you need airflow - sufficient holes in the enclosure directly below and above the heat-sink. Or, better still, make the heat-sink do double duty as enclosure walls.
Capacity is greatly determined by surface area.
If you rely on natural convection, then vertical surface area is what counts.
Using a tube profile, one of the two vertical surface areas is somewhat removed from the heat source. You will be better off using just a piece of 3-6mm think aluminum sheet/plate.
A rough guess for a 6 cm length of that tube profile is 15-20 W/K, if you a are dissipating around 10 W. (The thermal resistance goes up as you dissipate less).
Note that you need airflow - sufficient holes in the enclosure directly below and above the heat-sink. Or, better still, make the heat-sink do double duty as enclosure walls.
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