The original fluxes for electronics assembly were rosin-based. Prior to the IPC's J-STD-004(b), the defense electronics industry established specifications for fluxes. To this day, some contracts still exist that require fluxes that conform to the old Mil-Spec Mil-F-14256 or QQ-S-571 as a type R, RMA, or RA, even though these specifications have officially been folded into the J-Standard. Rosin-based fluxes were popular because not only is rosin a natural weak flux when molten, but it is also a good dielectric material when solid. Small amounts of residue left on the assembly generally will not harm the assembly unless it operates at high temperature and humidity.
|Formula||Acid #||Solids %||S.G.
|2036||50||35%||0.869||ROL0||ROL0||< 50 ppm||Foam||16-3000||Rosin Type "R", ROL0|
|836||50||36%||0.869||ROM1||ROM1||< 0.7%||Foam||16-784||Rosin Type "RA", ROM1|
|2212||38||25%||0.859||ROL1||ROL1||< 0.15%||Foam||16-2212||Rosin Type "RMA", ROL1|
Fluxes are available in 1-gallon and 5-gallon containers, and 55-gallon drums.
Related Markets and Applications
Rosin-Based Flux Technical Documents
No whitepapers to display
No presentations to display
No application notes to display
Product Data Sheets
Safety Data Sheets
No safety data sheets to display
Flux Blog Posts
You shouldn’t base your solder flux selection on just one data point.
Application Engineers read data for trends - providing better long-term answers.
Not all fluxes can handle the high processing temperature required for Au/Sn solder preforms.
From One Engineer to Another®
All of Indium Corporation’s products and solutions are designed to be commercially available
unless specifically stated otherwise.