NC277 LIQUID FLUX FEATURES VOC-Free Halide/Halogen-Free ORL0 per J-STD-004B Broad Process Window REACH Compliant Medium Post Process Residues Excellent in Extended Dwell Time Compatible with all Lead-Free Alloys DESCRIPTION NC277 Liquid Flux is a water-based VOC-Free flux that has performance and reliability characteristics equal or superior to many alcohol-based fluxes. A medium-solids/residue flux, NC277 has an exceptionally durable and powerful activator system. It is ideally suited for high thermal mass assemblies such as backplanes, power management, servers and palletized assemblies. NC277 can be used with all common lead-free wave soldering alloys including tin- silver-copper, tin-silver, tin-copper and others. Optimized for flux spray applications, NC277 has proven to reduce equipment maintenance. Designed as a no-clean, any remaining NC277 residue can be cleaned if critical to the product application. HANDLING & STORAGE Parameter Time Temperature CHARACTERISTICS Sealed Shelf Life 9 Months 4- 40 C (40 - 100F). NC277 is shipped ready-to-use, no mixing necessary. Do not mix used and unused chemical in the same container. Keep away from sunlight as it may degrade product. Reseal any opened containers. Protect from freezing. APPLICATION NC277 is formulated for application via spray, brush, mist, or dip. Foam fluxing is not recommended. NC277 is ready to use directly from the container. Proper flux coverage and uniformity will ensure consistent performance. An initial dry flux coating of 500-1500 micrograms per square inch is recommended. Process/quality requirements may require flux application quantities outside of these guidelines, e.g. full tunnel nitrogen application or palletized assemblies. Document Rev NF4 Page 1 of 4 PROCESS GUIDELINES CLEANING Using thermocouples attached to the top of the PCB, the topside NC277 can be cleaned using a saponifier or chemical cleaners. assembly temperature should be between 100-135C (212- Deionized water is recommended for the final rinse. Contact 275F) immediately prior to contacting the solder wave. As AIM for additional information. with all water based fluxes, convection type pre-heaters provide a wider process window. It is important that the flux be dry SAFETY prior to entering the wave regardless of temperature or Use with adequate ventilation and proper personal protective spattering will occur. Some smoking is considered normal if it equipment. Refer to the accompanying Material Safety Data is not excessive. Recommended contact time with the wave is Sheet for any specific emergency information. Do not dependent on wave configuration, pot temperature, alloy type dispose of any hazardous materials in non-approved containers. and thermal mass of the assembly with 4-7 seconds being typical. For processing assistance, please contact AIM Technical Support by visiting