3541 Alcohol-Based No-Clean Wave Solder Flux (1 Gallon)
Alcohol-based Fluxes
The main advantage of alcohol-based fluxes is that they require less preheat to drive off the solvent prior to entering the wave. This allows assemblers to run smaller wave soldering machines at a higher throughput rate. It also reduces the concern about flux that has not been completely heated inadvertently transferring to the top side of the circuit board.
Fluxes that have high solids content, as well as higher amounts of halogen, tend to be more heat-stable and solder better with a variety of board types, sizes, and thicknesses. Fluxes with lower solids contents and no rosin tend to be easier to electronically probe-test and have less visually apparent residue. Halogen content is not necessarily an indicator of final circuit board reliability since halogen types vary and rosin in the flux will enhance an assembly's surface insulation resistance.
3541 No-Clean Wave Solder Flux
3541 No-Clean is a low-solids flux specially formulated to be used for wave soldering where the solder cleaning process has been eliminated. This flux contains a small amount of resin which enhances the wetting properties.
3541 No-Clean is activated by a multi-component, synergetic fluxing system, which improves solderability. Any post-soldering residues are considered non-corrosive.
3541 No-Clean leaves a “tack-free” surface and does not interfere with ATE testing.
Process Recommendations
3541 No-Clean should be applied by spray for best results. A thin uniform flux deposition of 500-1,000 micrograms per square inch (77.5-155 micrograms/sq. cm) of flux solids should be applied as a starting point. This fl ux can be used effectively in single or dual-wave soldering systems. Assemblies with surface mount, leaded components or mixed technology can be soldered successfully.
3541 No-Clean can be used successfully with all solderability preservative coatings and organic solderability protective coatings.
| Test | Result |
| 3541 |
| Color | Straw |
| Specific Gravity @25 C (77 F) | 0.8 |
| Specific Gravity @15.5 C (60 F) | 0.806 |
| Acid Value | 25 |
| Solids Content | 4.31 |
| Flash Point (F TCC) | 54 |
| J-STD-004 Flux Type | ORL0 |
Safety
Flammable liquids should always be stored in a dry, well-ventilated environment away from open flames, sparks or direct heat.