3pcs TEC1-12715 Semiconductor Refrigeration Tablets TEC1-12715 12V 15A Heatsink Thermoelectric Cooler Cooling Peltier Plate Module 40x40MM

I only needed one, but I couldn't beat the price for three. The unit I installed worked great out of the box, the only thing it is not marked which side gets cold and which side gets hot, so before I installed it I tested it for a couple of seconds, the determination is then simple. Remember you will need heat sink compound for each side for heat and cold transfer. After installation I ran it for three days and all worked fine.

If your application isn't sensitive to tight performance tolerances, these TECs are probably adequate.I did, however, measure a fairly wide range of impedance among the individual TECs (2 to 4 ohms variation). As I don't presently have the capability of measuring actual heat flux while they're operating, I can't say for sure what effect the impedance variance may mean in actual use.Otherwise, they arrived in good condition, and they all functioned out of the box.

Photo Context:3D printed a housing to sit ONTOP of peltier to help hold water to make ice. It's there, just under the red housing, with the freshly made ice. :)Works better than the TEC1-12706. Less power AND gets EVEN COLDER. hit -12*c pretty quick. Used an old Desktop Heatsink and an intake and outtake fan. (12v for peltier, and fans). If I need more, I'll buy em here!

I had a bad peltier 12706 in my wine cooler, just wasn't cooling anymore. So i looked on line and seen some videos where it looked like this 12703 seemed to come down to a lower temp faster then 706. When i put it on a rig next to a 12706, the temp on the 706 side seemed lower then on the 703 side when i tested it. So i put a 12706 back in the wine cooler instead and now back to a sold 54 degrees in both sections of my wine cooler. So i dont know why this isn't cooler when the youtube tests showed it come down colder, but it didn't for me. I tried two of them out of the 3 and both did not bring down the temperature. So not sure if it's just these from this seller, or these 703s are spec'd differently? Anyways, didn't work for me.

As long as your power supply can handle the amps its capable of and you have a good heatsink and fan it will work flawlessly! Great product!