Easycargo 10 Packs TO-220 Heatsink + Insulator Mounting Screws Kits for LM317 LM317t L7805 L7812 L78XX Voltage Regulator, IRFZ44N 3205 520N 630 1404 MOSFET Transistor (20mmx15mmx11mm)

We needed to build a school project from scratch and this heatsink fits a 2 amp 5 volt regulator and worked out great removing the heat. The project was multi port USB charger that worked from AC/DC or solar cell.

Good quality, works well in a DC power supply and Audio power amplifier using TO-220 package devices. I used the KiCAD Heatsink_Fischer SK104-TSC-STIC foot print, but I had to modify the court yard to eliminate court yard conflict errors between the T0-220 package part and the heat sink (copied the foot print into personal component library, and modified the courtyard).

No issues

These are a good, cheap heatsink for TO-220 components like LM317 and 780x up to about 800 ma. They come with mounting hardware and precut silicone insulator. Suggestion: for higher power devices use a silver-bearing paste instead of the precut silicone, and take a moment to sand the back of the heatsink with 600 grit until you get to bare metal. This makes a world of difference and your device will run considerably cooler.Decent quality, especially for the price. Will buy again.

These heat sinks seem to do their job. I have missed them on a couple of devices that I have built, whenever I have a voltage regulator chip, it definitely calls for these. If you are planning on using one in your project just make sure you put some electrical tape on the proto board under it to electrically isolate it from the other lines. It's conductive and can short out your circuit if you're not isolating it electrically. Particularly an issue when using proto boards.

Perfect size for TO-220 and nice price. It would be nice to know the thermal resistance to make sure cooling is adequate for critical projects, but these are great for lightly to moderately loaded regulators. I will get more of these.

Smaller than expected

I'm a fan of these stylish heat sinks. They really dissipate heat well. And are very needed if you're dropping voltage with components like the 7805.Only downside is mounting to PCB.. If you plan to mount these to a PCB, then you'll need a small drill bit to make the hole slightly bigger for the mounting post to fit. I used a super tiny hex bit to bore the hole. Just make sure the hole isn't too big. If you can keep the solder ring intact, then that will be great to help secure it with solder.