Resistors General Purpose Cement General Cement Coated Purpose Wirewound Resistors Coated Wirewound Resistors Welwyn Components WA80 Series WA80 Series Cost effective Features Flameproof protection Surface mountcarbon ZI-formcomp. optionin many applications Can replace Flameproof protection Resistance values down to 0.01 ohms Can replace carbon comp. in many applications Ideal for pulse applications Resistance valueshandling down to 0.01 ohms Ideal for pulse handling applications All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data Power rating at 25c watts WA82 WA83 WA835 WA84 WA85 1 2.0 2.5 3.0 5 Power rating at 70c watts .86 1.6 2.0 2.5 4.3 Resistance range ohms 0R068 to 430 0R05 to 900R 0R05 to 900R 0R01 to 2K2 0R015 to 6K8 Limiting element voltage volts 50 50 75 100 150 Isolation voltage volts 250 250 250 350 500 TCR <1 :350 ppm/C Resistance tolerance % >1:200 20R: 1, 2, 5, 10 <20R: 5, 10 Values E24 preferred Thermal impedance C/watt Ambient temperature range 140 110 90 C 82 54 - 55 to 155 Physical Data Dimensions (mm) and Weight (g) L max. D max. f min. d nom. PCB mounting centres 6.2 2.8 21.20 0.6 10.20 0.6 0.22 WA83 9.0 3.6 19.80 0.8 12.70 1.2 0.50 WA835 12.5 4.5 17.80 0.8 18.40 1.2 0.50 WA84 14.5 5.2 24.55 0.8 20.30 1.2 1.10 WA85 16.5 7.0 23.55 0.8 22.86 1.2 1.75 Type WA82 Note 1: 5.4 for values 0R1 (Note 1) (Note 2) Min bend radius Wt nom. d D L f Note 2: 7.2 for values 0R1 Construction Terminations A high quality ceramic substrate is assembled with interference fit end caps to which are welded the termination wires. The resistive element is wound on the substrate and welded to the caps. Cement protection is applied to the resistor body before marking with indelible ink. Material Hot tin dipped copper wire Strength The terminations meet requirements of IEC 68.2.21. Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. General Note General TT ElectronicsNote reserves the right to make changes in product specification without notice or liability. BI Technologies IRC Welwyn Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. All information is subject to Welwyn's own data and is considered accurate at time of going to print. (c) Electronics plc (c) TT Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com A subsidiary of www.ttelectronics.com/resistors TT electronics plc 07.11 06.18 General Purpose Cement General Purpose Cement Coated Wirewound Resistors Coated Wirewound Resistors Welwyn Components WA80 Series WA80 Series Solvent Resistance Marking WA85 resistors are legend marked with type reference, resistance value and tolerance. In conformance with IEC 62. The body protection and marking are resistant to all normal industrial cleaning fluids suitable for printed circuits. WA82, 83, 835 and 84 resistors 0R1 and above are colour coded with 4 bands in conformance with IEC 62. Values below 0R1 are 3 band marked, two digits and tolerance, there is no multiplier band. The resistor coating will not burn under any condition of applied temperature or component overload. Flammability Performance Data Maximum Typical 3.0 Load at rated power: 1000 hrs at 25 or 70c R% 5.0 + .001 Dry heat: 1000 hrs at 200c R% 5.0 + .001 Derating from rated power at 25c 3.0 See derating curve Short term overload R% 5.0 + .001 1.0 Climatic R% 5.0 + .001 2.0 Climatic category R% 55/200/56 Long term damp Heat: 56 days R% 5.0 + .001 1.0 T.R.C. & Vibration R% 5.0 + .001 1.0 Robustness & Solder Heat R% 5.0 + .001 1.0 Pulse Handling Data available by request Application Notes Care must be taken when determining clearance between the resistor body and the P.C.B. or other components. Resistance is measured 6mm from body. Packaging All resistors are supplied tape packed ready for loading onto automatic sequencing and insertion machines. The critical dimensions are shown in figure 2. Component wires will not protrude beyond the outside edge of the tapes. Figure 2 All taped resistors will be supplied either on reels or in ammopacks, depending upon quantities orderded. These products are also available in a range of lead forming options. In particular, WA83, 84 and 85 are available in ZI-form SMD format packed in blister tape see http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf Type WA82 WA83 WA835 WA84 WA85 b 52 52 52 67 63 c 5 5 5 10 10 General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. c f1 f2 b 6 Body Location f 6 1 - f 2 1.4 mm BI Technologies IRC Welwyn (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 (c) TT Electronics plc 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com www.ttelectronics.com/resistors 07.11 06.18 General Purpose CementCement General Purpose Coated Wirewound Resistors Coated Wirewound Resistors WA80 Series WA80 Series Welwyn Components Ordering Procedure Example: WA83 at 470 ohms and 5% tolerance in ammo pack box of 2500 pieces WA83- 470RJI Type Value (use IEC62 code) Tolerance (use IEC62 code) F G 1% 2% J K Packing I Ammo Tape 5% 10% WA82 WA83 WA835 WA84 WA85 5000/box 2500/box 1500/box 1000/box 750/reel Standard General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK (c)Telephone: TT Electronics +44 (0)plc 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com www.ttelectronics.com/resistors 07.11 06.18