Electronics > Beginners
ROHS compliant 63/37 leaded solder paste?
Ian.M:
Its far far more likely to be entirely fake than expired product. What are the odds against enough tubes in bulk packs ending up expired then someone dodgy being in a position to repack them in fake retail packs, *AND* get them into the Amazon supply chain?
Anyone legit with short-date bulk packs to break wouldn't bother with the fake insert card - simply bag and sell.
JoeN:
I like MG Chemicals and have found all their products to be top quality. I buy them at Fry's. What I wonder is, if someone is going to pick a brand name for counterfeit solder, why MG? They are not as well known as Kester, as an example.
Tomorokoshi:
Here's another one. In the vertical-up writing on the side, it says:
--- Quote ---Superior joint strength Superior joint strength Superior joint strength Forme des joints forts Superior joint strength Superior joint strength
--- End quote ---
DaveW:
Stuff can be marked RoHS and still contain lead; if you but some of the Analog Devices gyros then they come with lead balls, but are still marked RoHS compliant, just with an addendum that they do contain lead. Confused our assemblers and we ended up asking Analog what on earth was going on...
T3sl4co1l:
FYI, anything with exemptions (usually aerospace applications, and elements that simply can't be substituted) can still be called RoHS.
For example, barium is quite toxic (when soluble), and it's unavoidable in type 2 ceramic capacitors (barium titanate). So, these capacitors are always by exemption, at least on their barium content. (I would assume single elements or chemicals can be exempted, individually. So that's not to say that you can go ahead and solder barium-rich capacitors with lead, just because they have one kind of exemption.)
It's still weird putting it on leaded solder, which, in and of itself, clearly has an excessive amount in its composition, and isn't necessarily intended for exempted applications. (Composition is necessary to discuss, because harmful materials can be diluted in the assembly process. You'd have to read the standard to see exactly which levels of assembly are considered a whole component, for purposes of composition. For example, a packaged semiconductor might have lead solder die-attach, or lead ball flip-chip construction. But a PCBA might not be allowed to use leaded solder, even if the overall concentration of the assembly is satisfactory. I don't know offhand where they draw the line here.)
Tim
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