Electronics > Beginners
Silicone glue for heatsink short circuits
LaserTazerPhaser:
Can this https://www.aliexpress.com/item/2Pcs-Thermal-Conductive-Heatsink-Plaster-Viscous-Compound-Glue-for-PC-GPU-88-DJA99/32886629909.html cause inaccuracies for 2728 shunts when gluing small heatsinks?
Shunts rely on millivolts Im not sure if the rubber would conduct just enough from pad to pad to make the shunts not work properly.
Is the glue not safe for contact onto pads or leads of components on the board?
LaserTazerPhaser:
--- Quote from: blueskull on March 26, 2019, 12:38:12 am ---A shunt relies mV to work reliably, and it also has mR of DC/LF impedance. The resistance of that grease is probably in tera Ohms range, so no worries at all.
--- End quote ---
How about for components working with 12v-48v?
Perhaps a chip capacitor near a switching inductors which has joining glue on its pads and the inductors pads.
wraper:
The issue here is that you should not use it unless your heatsink is non conductive because this adhesive won't insulate it reliably.
LaserTazerPhaser:
--- Quote from: wraper on March 26, 2019, 12:48:57 am ---The issue here is that you should not use it unless your heatsink is non conductive because this adhesive won't insulate it reliably.
--- End quote ---
Working with ceramic heatsinks. Not sure if silicone will cause shorts by itself.
JustMeHere:
I recently used Gorilla Glue Silicone Sealant to provide stress relief and insulation for a thermocouple connection.
I tested a bead of the sealant when it was wet. At less than 1mm separation I still read open circuit on my multi-meter resistance. I could also not get a resistance reading once it dried.
It helped stabilize my thermocouple's cold junction.
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