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There is often some rubbery white substance (looks kind of like some hot-glue) in switching power supplies.

example image of power supply

In this example it's on the right side between those electrolytic capacitors.

What is it; what is it called like? And what is it's purpose?

t0bias
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1 Answers1

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Some sort of silicone goo

It's there to stop the tall parts from flapping around and breaking off.