TECHNICAL DATA SHEET 285 Flux-Cored Wire Mildly Activated Rosin Cored Wire for Leaded and Lead-free Alloys Product Description Kester 285 Flux-Cored Wire is a mildly activated rosin flux is classified as Type ROL0 flux under IPC J-STD-004. This flux was formerly classified as Type RMA per QQ-S-571. 285 consists of high quality, purified rosin to which a synergistic combination of activating agents has been incorporated. The fluxing ability of 285 is much greater than ordinary mildly activated rosin fluxes and is comparable to fully activated rosin fluxes. 285 has been developed for use in the electronic industry where difficult assemblies are to be soldered, but process requirements stipulate use of a mildly activated rosin flux. Performance Characteristics: Industry standard RMA cored wire Compatible with leaded and lead-free alloys Classified as ROL0 per J-STD-004 RoHS Compliance This product meets the requirements of the Restriction of Hazardous Substances (RoHS) Directive, 2011/65/EU for the stated banned substances. (Applies only if this core flux is combined with a lead-free alloy.) Reliability Properties Copper Mirror Corrosion: Low Tested to J-STD-004, IPC-TM-650, Method 2.3.32 Corrosion Test: Low Tested to J-STD-004, IPC-TM-650, Method 2.6.15 Silver Chromate: Pass Tested to J-STD-004, IPC-TM-650, Method 2.3.33 Chloride and Bromides: None Detected Tested to J-STD-004, IPC-TM-650, Method 2.3.35 Fluorides by Spot Test: Pass Tested to J-STD-004, IPC-TM-650, Method 2.3.35.1 285 Flux-Cored Wire Technical Data Sheet Issue: 17 May 2021 Page 1 of 4 TECHNICAL DATA SHEET Surface Insulation Resistivity (SIR): Pass Tested to J-STD-004B, IPC-TM-650, Method 2.6.3.7 Surface Insulation Resistivity (SIR), IPC (typical): Pass Tested to J-STD-004, IPC-TM-650, Method 2.6.3.3 Blank 285 10 9 Day 1 1.0*10 3.2*10 9 9 Day 4 9.5*10 7.7*10 9 9 Day 7 8.3*10 7.0*10 Spread Test (typical): Pass Tested to J-STD-004, IPC-TM-650, Method 2.4.46 2 2 Area of Spread mm (in ) Flux Core Solder Cu Ni 285 335 (0.52) 140 (0.22) 282 240 (0.37) 100 (0.16) 44 280 (0.43) 160 (0.25) Availability 285 is available in a wide variety of alloys, wire diameters and flux percentages. For most applications, Sn63Pb37 or Sn96.5Ag3.0Cu0.5 is used. Consult Kesters website for the comprehensive alloy list and for standard wire diameters. The standard wire diameter for most applications is 0.8 mm (0.031 in). Wire diameters range from 0.25 to 6.00 mm (0.010 to 0.250 in). The amount of flux in the wire dictates the ease of soldering for an application. 285 is packaged on spools of different sizes to accommodate a variety of applications. Note: Core Size 50, 58 and 66 = 1.1%, 2.2% and 3.3% flux core. 285 Flux-Cored Wire Technical Data Sheet Issue: 17 May 2021 Page 2 of 4