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Author Topic: solved: Is lead free HASL okay for 0402 resistors and 0.5mm QFN-48?  (Read 262 times)

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Offline incfTopic starter

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solved: Is lead free HASL okay for 0402 resistors and 0.5mm QFN-48?
« on: March 28, 2025, 08:38:42 pm »
"Is lead free HASL okay for 0402 resistors and 0.5mm QFN-48?"

At what point is HASL too bumpy to allow assembly of small SMT components? Can 0201's be compatible with HASL?

It seems like it can vary a lot.
« Last Edit: March 29, 2025, 03:41:22 pm by incf »
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Offline ahsrabrifat

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Re: Is lead free HASL okay for 0402 resistors and 0.5mm QFN-48?
« Reply #1 on: March 29, 2025, 02:53:07 pm »
Lead-free HASL is not ideal for 0402 resistors.
https://www.acdi.com/comparing-pcb-surface-finishes
 
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Offline wraper

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Re: Is lead free HASL okay for 0402 resistors and 0.5mm QFN-48?
« Reply #2 on: March 29, 2025, 02:58:52 pm »
It depends, if it's a good HASL, it will be fine. But HASL often is way too bumpy for that. If it's for production, for cost saving use OSP instead.
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