How can I electrically isolate a PCB from a heat sink?

I have a set of LED driving lights for motorcycle that must be wired through a ground-leg pulse width modulation dimmer. The problem is the mounting bracket for the lights is grounded, so the lamp shorts to ground through the motorcycle chassis and the PWM dimmer cant dim the lamps. How do I handle this problem?

December 5, 2023

Use Kapton tape
Use Sil-pad and shoulder washer. If you use a sil-pad the screw will still electrically connect the componet tab with the heat sink, soashoulder washer should be used to isolate the screw and the tab.

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

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How can I electrically isolate a PCB from a heat sink?

Oliver Smith

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What Others Are Asking

What is the proper zero orientation for a SMT LED?

How do I design a PCB when the components used in the design are not available in PCB designing tools such as Eagle CAD?

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