CHANZON 25pcs 1W 3W 5W LED Heat Sink (2 pin Black) Aluminum Base Plate Panel PCB Circuit Board Substrate 20mm Star DIY Heat Sink Cooling for COB High Power LED Chips Lamp Beads 1/3/5 Watt

I used these for a 3D print of my son's Christmas gift: an oxygen destroyer replica from 1954's 𝘎𝘰𝘥𝘻𝘪𝘭𝘭𝘢. I'm very, very pleased with the outcome. The aluminum material seems to be of decent quality. I was able to secure the LED's using some rosin/flux paste and silver solder. I added some CPU thermal paste to help transfer heat from the LED to the heatsink. In testing, I was unable to get the temp of the heatsink above 89°F, which is fantastic! The quantity of 25 was far more than reasonable for the price and shipping was very fast. I would absolutely recommend these to anyone running higher wattage (1/3/5) LED's.

Very nice heat sink units, they work great with high powered leds.

Yes it is true they are easy to solder, but they have two minor flaws and a big one. First. There are two of the six soldering spots that are intended to be the diode soldering spots. You realize that after you have 4 or 5 diodes soldered on the spots are not the right ones. Why not a picture or a draw inside the package??. Second. When you put the diode on the heat sink you loose the +- marks, because they are bellow the diode, you can just see a little pars of the plus or minus and need to guess which one is + or -. The big one. They CAN'T dissipate 5 W. I made a series parallel circuit in which each 5 W diode dissipates 1,6 W. With that energy, the temperature stabilizes at 57 *C in 17 minutes. If I change the circuit in order each diode dissipates 3,4 W, the diodes reach almost 70 *C in two minutes, that will burn them in minutes.

From my early assessment, these alone won't dissipate enough heat for 5w LED but if you mount them to some aluminum, they seem to work great. Great fit for the 5w chanzon LED. Having 2 additional solder pads on + and - make wiring in series or parallel a breeze.

Adequate for soldering on an LED.

Purchased these to go along with the Chanzon 10 pcs High Power Led Chip 4W RGBW 8 pins (300mA-350mA for Each Color 4 Watt) Multicolor Super Bright Intensity SMD COB Light Emitter Components Diode 4 W Bulb Lamp Beads DIY Lighting . Mounted the chips with a dab of thermal compound (I used Arctic Silver Céramique), and everything works as expected. They shipped in a single sheet still attached, so you can use part of the sheet as an array and keep them attached, or just bend them back and forth a couple times to snap one off and use singly. My only complaint, if you can call it that, is that these come in sets of 25 while the LEDs come in sets of 10, so unless you buy 5 x 10 LEDs and 2 x 25 Heat sinks you end up with extras. Would be nice if Chanzon matched up the quantities a little better, but for the price, you still can't beat it (and like me, you will probably end up coming back for more anyway, so hang on to those extras!)

Great material

These make things much easier and convenient when working with led’s of this size. And the amount you get will last you a long time. All the markings are accurate and it’s very easy to solder onto these boards.

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tutto ok

Arrived on time and as described. Nice solid quality heat sink and does what its supposed to do without any problem. Well pleased and happy to give a 5 star rating to Seller and the product. Thank you.

Para lo que los quería que es para soldar unos les chip, van bien.

Mounting LEDs... seems to work okay so far!