Extra Large Heat Sinks Aluminum 11.81" x2.71" x 1.41" / 300 x 69 x 36mm High Power Heatsink Diffusion Cooling Module Cooler 27 Fin Radiator for LED Light Amplifier Transistor Semiconductor PCB

The fin count and fin aspect ratio of this heatsink is impressive, especially to us old-timers that remember a time when heat sinks with this high a surface-to-volume ratio had to be made by edge-embedding sheet fins into a milled-slot carrier.I found a dimensionally-similar (2.581" wide instead of 2.71", 1.340" tall instead of 1.41" tall) heat sink in an online AAvid catalog, model # 83220. The AAvid heatsink specs were 1.01 oC/W/3in (still air), so I'm expecting this heatsink could be 10% better (lower). Note that if you bought a length other than 3", the thermal resistance does not scale linearly with 1/Length, assuming a centrally located thermal point source. For the 15.75" length I'm using, the improvement is only a 50% reduction in thermal resistance.Also note that the thermal resistance decreases (improves) with moving air. While the documentation I found for the #83220 did not provide thermal resistance versus air flow, I found another AAvid catalog and heatsink #72070 (dimensions 3.008" wide, 1.02" tall, similar fin aspect ratio, 1.4 oC/W/3in) that provided a thermal performance versus airflow table; for a modest airflow (quiet muffin fan) of ~700 LFM, the thermal resistance drops by about another 70%.Net result, for the 15.75 inch length option, operating with 700 LFM forced air flow, is expected to be about (1oC/W/3in * 90% * 50% * 30%) = 0.14oC/W. My heat source is distributed along the 15.75" length, rather than being a point source in the center, so I expect the actual performance to be 2-3x better (lower resistance) than the above calculation.One final note, the fins on these heatsinks are thin and quite prone to bending, especially the outermost vanes. These arrived well-packed in foam sheets inside a custom-sized cardboard boxes, and only one of the four I purchased required any straightening of the fins.

Nice heat sink. Ample room for two SSRs

Lots of surface area...Gotta make your own mounting standoffs to keep up and air moving all around...works well

This is a great little heat sink it has great heat dissipation. If you are using a cooling fan the air flows through easily. There is plenty of cooling power. 👍

The glue works great. I stuck two onto a large planer LED light's large aluminum back plate and directed a fan onto them. It runs pretty hot at full brightness. It ran much cooler and probably lowered the IR output quite a bit with the heat sinks. I might put another one on.

My phone gets pretty hot when I'm charging it, this dissipates the heat really well. Put some rubber feet on it so it does not scratch the furniture, but I think a dab of silicone would stay on better. This size matches my phone really well while the camera bump hangs over the edge.

Thanks

I have a 12 Volt 10 amp heavy duty power supply to replace all individual power supply's that feed part of my network setting and a 4" computer fan to keep it cool and prolong it's life but the noise was quite annoying and had to replace it often.Decided to add a big aluminum radiator adhered with thermal tape to the power supply aluminum rear back plane as to have only convection cooling and yesss it worked absolutely great, now the power supply is barely warm and zero noise.Besides the problems I had with the thermal double side tape lack of enough adherence, which was unable to hold the radiator on it's place and force me to fabricate 4 steel holding brackets , once I installed the brackets now I am absolutely relieved of any overheat problems !!!!