951 Flux-Pen, No-Clean
Kester 951 Flux-Pen is a halogen-free, non-rosin flux-pen that is specifically designed for rework of conventional and surface mount circuit board assemblies. The extremely low solids content (2.0%) and nature of the activator system results in practically no residue left on the assembly after soldering. There are no residues to interfere with electrical testing. 951 Flux-Pen exhibits improved soldering performance to minimize solder bridges (shorts) during rework operations.
This flux is suitable for automotive, computer, telecommunications and other applications where reliability considerations are critical. The surface insulation resistance on soldered boards is higher than that provided by typical organic water soluble fluxes. 951 Flux-Pen contains a corrosion inhibitor such that no corrosion products are formed when bare copper surfaces are exposed to humid environments.
RoHS Compliance
This product meets the requirements of the Restriction of Hazardous Substances (RoHS) Directive, 2011/65/EU for the stated banned substances.
Flux Application
951 Flux-Pen is applied to circuit boards via Flux-Pen for rework of printed wire assemblies.
Process Considerations
951 Flux-Pen should only be applied to areas that will be fully heated by the soldering iron or other reflow tool. Care should be taken to avoid flooding the assembly. The surface tension has been adjusted to help the flux form a thin film on the board surface allowing rapid solvent evaporation.
Cleaning
951 Flux-Pen flux residues are non-conductive, non-corrosive and do not require removal in most applications.