NUBM47-A1 Heatsink Test

[loreadarkshade]

Comparing different heatsink configurations to show best effective heat dissipation.
It is interesting to note that negligible power was lost after de-soldering the diode from the block and re-soldering it at 240°c.

All tests were performed at 4.50A with a constant current power supply.
The cap lens was not removed from the diode.

It is clear from these tests that the back of the diode is the most important part to heatsink.

According to the graph, this G2 lens had a 96.6% efficiency.

 

[Gryphon]

Very interesting! How long were these run for before taking the measurement in each of the different configurations? I imagine the more inefficient setups would show more and more degradation as the diode got more and more heat soaked. This really does speak volumes for good heatsinking

 

[loreadarkshade]

Very interesting! How long were these run for before taking the measurement in each of the different configurations? I imagine the more inefficient setups would show more and more degradation as the diode got more and more heat soaked. This really does speak volumes for good heatsinking

The diode was allowed to return to ambient temp between each run of course.