Pros and Cons of Low-Temp Solder Paste - Workbench Wednesdays 46

Low-temperature solder paste makes it easier to reflow solder and re-work surface mount circuit boards. MG Chemicals offers a Bismuth-based paste that works great from larger passive components to fine pitched packages, like QFN. In this video, learn what solder paste is, what it means for a paste to be “low temperature,” and some things to watch out for when using it.

Supplemental Content:

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Now
Low Temperature Solder Paste 15g syringe	MG Chemicals	1	Buy Now
Low Temperature Solder Paste 25g syringe	MG Chemicals	1	Buy Now
No Clean Flux Syringe	MG Chemicals	1	Buy Now

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koudelad over 3 years ago

Nice video! You mentioned mixing this low temperature alloy with an existing solder - that is how Chip Quick works for removing chips and other parts from assembled PCBs (no advertisement intended): https://www.chipquik.com/store/index.php?cPath=200
They claim the melting point is VERY low, below 100 Centigrade. https://www.chipquik.com/datasheets/SMD1NL.pdf

It is very important to remove the mixed alloy after removing the part, because it would heavily affect the the melting point when soldering a new part in (and I believe it could easily corrode.)
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scottiebabe over 3 years ago

Would have been handy when I tried to rework a hot bar soldered display flex. Neat product.
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DAB over 3 years ago

Good episode.

I did not know much about the solder paste options, so I found this overview very interesting.

DAB
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