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Description: This is your basic spool of leaded solder with a 63/37 water soluble resin core. 0.031" gauge and 100 grams. This is a good spool for more advanced users that should last 6-12 months depending on how often you solder.

Mix: 63% Sn / 37% Pb

Comments 25 comments

  • This leaded solder is marked as RoHS compliant. How can that be?

  • I’m a complete novice – never soldered in my life, but about to start! I’ve read that water-soluble flux is harsher (more corrosive) than rosin and I’ve read warnings that say it can damage electronics if it is not removed from all the nooks and crannies after soldering. I figured I would only use solder with a mildly activated rosin flux core but I can’t find any solder in the Sparkfun store that fits that description. This item description says it has a “water soluble resin core”, so should I be worried?

    Also, the description says it is a good spool “for more advanced users”. What is it about this spool that makes it good for advanced users? (Is it just the fact that it is a large quantity? I couldn’t find a smaller quantity in the store for leaded solder.)

  • why dont you have a smaller diameter?

  • This solder won’t be a risk of lead poisoning, right? Unless I do something stupid like eat it.

  • So with this you dont need any solder paste or a flux pen?

    • For most small work on new boards, from resoldering a tiny SMD resistor to soldering down the small tabs on a barrel jack plug, you should be fine.. the flux core does the trick. For bigger things, say the slotted tabs on a beefy relay or some multistrand thick gauge wire, I still drip some flux on.. just helps the solder spread out (and in) more cleanly.

  • Sorry, but does anyone know the length of the solder?

    • dSn=7310 kg/m3

      dPb=11340 kg/m3

      dSnPb=7310x63/100 + 11340x37/100 = 8801.1 kg/m3

      S=(gauge/2)x3.14 = 4.86x10-3

      m=0.1kg

      m=dSnPb x S x l

      0.1kg = 8801.1kg/m3 x 4.86x10-7 x l

      l=0,1kg/0.00427 = 23.41m

      so it should be about 23.4 meters long

      • You forgot about the “water soluble resin core” ;) Still, A for effort! ( I’m sure it’s pretty close :) )

    • you don’t really measure solder in length now do you? It’s a 100 gram spool. Feel 100 grams of something–decently heavy for solder–should last you a while

  • You actually aren’t likely to get lead poisoning from lead solder.
    Lead poisoning usually occurs from contact with lead acid and lead salts.

    • I’d imagine it’s the case of CYA. The average hobbyist isn’t going to get heavy metal poisoning from using lead solder, especially if they are careful, minimize exposure, don’t ingest anything while soldering, and washing their hands and exposed body surfaces with soap, hot water, and a nylon brush thoroughly (more than a minute) when they are finished. However, lead (like other heavy metals) are -cumulative- exposure, which means it builds up in your system over your lifetime.

  • Does anyone know the wire diameter?

  • Be careful, I ordered this and received a spool of 63/37 solder instead of the 60/40 as is claimed.

  • The description says 100grams ;)

  • Does anyone know how many grams of solder are in the spool?


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