Guest
 Posted: Thu Nov 06, 2025 10:32 am Post subject: Can Mounted Parts Still be Damaged by ESD? |
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| Is it true that parts already mounted on a board can still be damaged by ESD? I thought parts in a circuit are already safe from ESD? This is what my sup told me a couple of years ago.
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Guest
| Posted: Mon Nov 17, 2025 3:24 pm Post subject: |
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| its usual misconception that mounted parts are protected from esd because the pins are no longer floating. however if you think about it you can still deliver a pulse directly to a pin of a mounted device so you can still destroy it by hbm or mm. i’ve also read pcb's or assemblies can store a lot of energy because of its high capacitance. this stored charge may be released as esd if a metal trace of the board touches a grounded surface. ic’s connected to the shorted trace will be destroyed. they call this charged board model or CBM esd.
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