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.

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Olivier Smit

Oliver is een ervaren elektronica-ingenieur met kennis van PCB-ontwerp, analoge circuits, ingebedde systemen, en prototyping. Zijn diepgaande kennis omvat schematisch vastleggen, firmware-codering, simulatie, indeling, testen, en probleemoplossing. Oliver blinkt uit in het omzetten van projecten van concept naar massaproductie met behulp van zijn elektrische ontwerptalenten en mechanische vaardigheden.

Olivier Smit

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

Olivier Smit

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Wat anderen vragen

Hoe kan ik de vochtadsorptie op FR4 PCB minimaliseren?

How do PCB manufacturers prevent solder from entering vias during wave soldering?

What are some of the benefits and downsides of moving from a two layer PCB with components on a single side, to a four layer PCB with components on both sides?

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