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What lead-free finishes are alternatives for tin-lead finishes?

April 26, 2017Alternatives finishes Lead-Free tin-lead

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What lead-free finishes are alternatives for tin-lead finishes?

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Component terminations are more consistently solderable if they are pretinned with melted solder. Alternative lead-free solders for tinning are tin-silver-copper, tin-silver, tin-copper, and tin-bismuth. Other metals can be plated onto the terminations, but the same potential problems exist as with printed wiring boards. Component manufacturers seem to have mostly standardized on matte tin plating or palladium-nickel. Electroless nickel under immersion gold is acceptable provided the nickel does not contain more that about 7-8% phosphorous.