Description
Alpha NR300A4 is an essentially VOC-free1, halide-free, rosin/resin free, low solids, no-clean flux. It is formulated for wave soldering of through-hole, mixed technology and surface mount assemblies. Alpha NR300A4 provides excellent soldering on bare copper boards with organic coatings. The soldering of bare copper boards is extremely difficult due to the thermal treatments which most boards have previously experienced (reflow and adhesive cure), which generates a strong oxide coating. The flux produces a tack-free surface with high surface insulation resistance and no residue to interfere with electrical testing. Alpha NR300A4 has a unique formulation that provides high activity with virtually no visible residue with most solder masks.
