Many technicians run into repeated failures with thermoelectric coolers due to poor thermal contact, undersized power supplies, or lack of proper ventilation. I wanted to start a discussion on what preventive steps you all take to extend the lifespan of these devices.

For example, I’ve seen success using higher-quality thermal paste and adding extra heat sinking in small enclosures. What techniques do you recommend?

 

I can't really recommend to others, but for me personally...

1. Of course, proper thermal maintenance is essential, heat sinks, fans, proper usage of the thermal compounds and proper contact pressure.

2. Avoiding thermal stress, that is to say the stresses caused by constant cooling and heating, by using the proper power application, being either linear or high frequency PWM.

3. Most of my designs use spring loaded heat sinking.

4. High quality TECs.

5. Proper derating.

6. Not expecting miracles from a completely inefficient system.

Oh, one last thing, don't apply stress that will bend those suckers...