SF855-LR Soldering Flux
Kester SF855-LR is a low solid, low residue, no-clean non-rosin organic flux designed specifically for use in tabber and stringer equipment of Photovoltaic Assembly (PV) through soldering tabs to cell contacts. SF855-LR can be applied directly to interconnecting ribbon by hand soldering and auto-equipment with tabbing and stringing soldering system, and by dipping or spraying methods. The extremely low solids content (around 1.6%) and nature of the activator system results in practically no residue left on the cell after soldering. Cells are dry and cosmetically clean as they exit the tabber and stringer machine. SF855-LR has a wide operating window and temperature range. It can be used in SnPb, SnAgPb and Pb-free applications.