275 275 No-Clean Cored Wire No-Clean Cored Wire For Lead-bearing and Lead-free alloys For Lead-bearing and Lead-free alloys Product Description Reliability Properties Copper Mirror Corrosion: Low Kester 275 No-Clean Flux for cored solder wire Tested to J-STD-004, IPC-TM-650, Method 2.3.32 was developed to provide superior wetting performance for hand soldering in the electronics Corrosion Test: Low industry. The chemistry is based on some of the Tested to J-STD-004, IPC-TM-650, Method 2.6.15 same principles that have been safely used for years in mildly activated rosin fluxes. The use of Silver Chromate: Pass 275 No-Clean Flux results in an extremely clear Tested to J-STD-004, IPC-TM-650, Method 2.3.33 post-soldering residue without cleaning. The Chloride and Bromides: None Detected unique chemistry in Kester 275 was also designed Tested to J-STD-004, IPC-TM-650, Method 2.3.35 to reduce spattering common to most core fluxes. Kester 275 can be used for both lead bearing and Fluorides by Spot Test: Pass lead-free soldering. Tested to J-STD-004, IPC-TM-650, Method 2.3.35.1 Performance Characteristics: SIR, IPC (typical): Pass Tested to J-STD-004, IPC-TM-650, Method 2.6.3.3 Colorless translucent residues Improves wetting performance Blank 275 Excellent solderability and fast wetting to a 10 10 Day 1 1.6 10 W 1.1 10 W variety of surface finishes 10 9 Day 4 1.210 W 9.2 10 W Eliminates the need and expense of cleaning 10 9 Day 7 1.1 10 W 8.6 10 W Low smoke and odor Low spattering Spread Test (typical): Compatible with leaded and lead-free alloys Tested to J-STD-004, IPC-TM-650, Method 2.4.46 Classified as ROL0 per J-STD-004 2 2 Compliant to Bellcore GR-78 Area of Spread mm (in ) Flux Core Solder Sn96.5Ag3.0Cu0.5 Sn63Pb37 285 Mildly Activated Rosin 213 (0.33) 335 (0.52) RoHS Compliance 245 No-Clean 200 (0.31) 348 (0.54) This product meets the requirements of the RoHS 275 No-Clean 219 (0.34) 361 (0.56) (Restriction of Hazardous Substances) Directive, 2002/95/EC Article 4 for the stated banned substances. (Applies only if this core flux is combined with a lead free alloy.)275 Application Notes Availability: Kester 275 is available in a wide variety of alloys, wire diameters and flux percentages. For most applications, Sn63Pb37, Sn96.5Ag3.0Cu0.5 or K100LD is used. Consult the alloy temperature chart in Kesters product catalog for a comprehensive alloy list. The standard wire diameter for most applications is 0.80mm (0.031in). Wire diameters range from 0.25 - 6.00mm (0.010 to 0.240in). AStandard Wire Diameter chart also is also included in Kesters product catalog. The amount of flux in the wire dictates the ease of soldering for an application. For tin/lead applications, core 50 or 58 (1.1 and 2.2% flux by weight) are recommended. For Lead-free and high-lead applications, core 58 or 66 (2.2 and 3.3% flux by weight) are recommended. Process Considerations: Solder iron tip temperatures are most commonly between 315-371C (600-700F) for Sn63Pb37 and between 371-427C (700-800F) for lead-free alloys. Heat both the land area and component lead to be sol- dered with the iron prior to adding Kester 275 cored wire. Apply the solder wire to the land area or compo- nent lead. Do not apply the wire directly to the soldering iron tip. If needed, Kester 959T no clean, liquid flux may be used as a compatible flux to aid in reworking soldered joints. Kester 959T is also available in Flux-Pens for optimum board cleanliness. Cleaning: The 275 residues are non-conductive, non-corrosive and do not require removal in most applications. The flux residues are comparable to a conventional RMA except that the 275 residue is clear and colorless. Storage, Handling, and Shelf Life: Storage must be in a dry, non-corrosive environment. The surface may lose its shine and appear a dull shade of grey. This is a surface phenomena and is not detrimental to product functionality. Flux cored solder wire has a limited shelf life determined by the alloy used in the wire. For alloys containing > 70% lead, the shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of manufacture. Health & Safety: This product, during handling or use, may be hazardous to health or the evironment. Read the Material Safety Data Sheet and warning label before using this product. World Headquarters: 800 West Thorndale Avenue, Itasca, Illinois, 60143 USA Phone: (+1) 630 616-4000 Email: customerservice kester.com Website: www.kester.com Asia Pacific Headquarters European Headquarters Japanese Headquarters 500 Chai Chee Lane Zum Plom 5 20-11 Yokokawa 2-Chome Singapore 469024 08541 Neuensalz Sumida-Ku (+65) 6449-1133 Germany Tokyo 130-0003 Japan customerservice kester.com.sg (+49) 3741 4233-0 (+81) 3-3624-5351 customerservice kester-eu.com jpsales kester.com.sg The data recommendations presented are based on tests, which we consider reliable. Because Kester has no control over the conditions of use, we disclaim any responsibility connected with the use of any of our products or the information presented. We advise that all chemical products be used only by or under the direction of technically qualified personnel who are aware of the poten- tial hazards involved and the necessity for reasonable care in their handling. The technical information contained herein is consistent with the properties of this material but should not be used in the preparation of specifications as it is intended for reference only. For assistance in preparing specifications, please contact your local Kester office for details. Rev: 20Sep12