NC275B NO CLEAN LIQUID FLUX FEATURES VOC-Free Zero Halide/Halogen Broad Process Window Medium Post Process Residues REACH Compliant High Activity DESCRIPTION NC275B 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, NC275B can be used with all common lead-free wave soldering alloys including tin-silver-copper, tin-silver, tin-copper, and others. NC275B activity properties solve barrel fill and wetting issues common to many lead- free alloys. NC275B residues can be left in place after soldering or removed with an appropriate cleaning agent. APPLICATION NC275B is formulated for application via spray or mist. Foaming HANDLING & STORAGE is not recommended. NC275B is ready to use directly from its Parameter Time Temperature container, no thinning required. When spray fluxing, proper flux Sealed Shelf Life 1 year Room Temperature coverage and uniformity are imperative. A dry flux coating of 500- NC275B has a sealed shelf life of one (1) year when stored at 1500 micrograms per square inch is recommended as a starting room temperature. Do not store near fire or flame. Keep point. When nitrogen sealed wave solder equipment is used, it may away from sunlight as it may degrade product. NC275B is be necessary to apply additional flux. shipped ready-to-use, no mixing necessary. Do not mix used and unused chemicals in the same container. Reseal any PROCESS GUIDELINES opened containers. Using thermocouples attached to the top of the PCB, the topside assembly temperature should be between 100-135C (212-275F) CLEANING immediately prior to contacting the solder wave. As with all water NC275B can be cleaned using a saponifier or chemical based fluxes, convection type pre-heaters provide a wider process cleaners. Contact AIM for additional information. Deionized window. It is important that the flux be dry prior to entering the water is recommended for the final rinse. wave regardless of temperature or spattering will occur. Some smoking is considered normal if it is not excessive. Recommended SAFETY contact time with the wave is dependent on wave configuration, pot Use with adequate ventilation and proper personal protective temperature, alloy type and thermal mass of the assembly with 4-7 equipment. Refer to the accompanying Safety Data Sheet for seconds being typical. For processing assistance, please contact any specific emergency information. Do not dispose of any AIM Technical Support by visiting hazardous materials in non-approved containers. TEST DATA SUMMARY Name Test Method Results IPC Flux Classification J-STD-004 ORL0 J-STD-004B IPC Flux Classification ORL0 3.3.1 Name Test Method Results Image J-STD-004B 3.4.1.1 Copper Mirror LOW IPC-TM-650 2.3.32 Before After J-STD-004B PASS 3.4.1.2 Corrosion (minor IPC-TM-650 corrosion) 2.6.15 J-STD-004B 3.4.1.3 Br 0.0% Quantitative Halides IPC-TM-650 Cl: 0.0% 2.3.28.1 J-STD-004B Qualitative Halides, 3.5.1.1 PASS Silver Chromate IPC-TM-650 2.3.33 Document Rev NF8 Page 2 of 3