Kristall 611 no-clean flux-cored solder wire

Technical specifications

Specifications are taken from the manufacturer’s technical documentation. Updated 11/13/2026.

Description

This flux-cored solder wire belongs to the greenconnect series and is built around a halogen-activated No-Clean flux. It was developed for demanding conventional and SMD soldering in industrial manufacturing, and it is equally suited to repair and re-soldering work. The product is listed under the grade designation Kristall 611.

The flux core uses synthetic resins and is well activated. It combines high activity and very good flow properties with a low solids content and electrically safe residues. The resin is chemically modified, which reduces the health risks associated with rosin-based fluxes. The flux also has only a mild odour, which makes it more comfortable for operators during continuous work.

In use, the wire produces very low flux spitting and solders quickly. It leaves colourless No-Clean residues, so the soldered assemblies stay visually clean and remain electrically safe without mandatory post-cleaning. This combination of activity and clean residue behaviour makes the wire a practical choice for production lines and rework stations where joint quality and appearance both matter.

Kristall 611 can be used for both hand and machine soldering in electrical engineering and electronics. It is particularly effective where wettability may not be ideal and soldering speed is required, such as surfaces that are difficult to wet or high-throughput applications that need fast, reliable joint formation. If residue removal is still desired, for example for cosmetic reasons or specific downstream processes, the matching cleaner Flux-Ex Post is available for use with this wire. A technical datasheet and safety data sheets are provided for the product.