Phosphor Pellets

Phosphor pellets are small tablets made from tin with a high phosphorous content. They are added to solder baths filled with lead-free/tin-lead solders to inhibit oxidization, which is why they are also referred to as anti-oxidization pellets. Many solders as used in the wave- and selective soldering process in the electronic industry are doped by the manufacturer of the solders with a certain amount of phosphor. Too much phosphor in the bath can lead to substandard soldering results.