Introduction： ZG-552A is a lead zero halogen free cleaning needle solder paste, the product has good wettability, strong dry resistance, long shelf life at room temperature, bright and full solder joints, little residue after welding, transparent color and large insulation impedance, will not corroded PCB and other plates, can meet the requirements of free washing, moderate viscosity can meet the requirements of various points tin. Widely used in photovoltaic junction box welding.