WK73R wide terminal type flat chip resistors EU features Wide-side termination (reverse-geometry) type flat chip resistor High reliability and performance with T.C.R. -6 100 x 10 /K, resistance tolerance 0.5% Products with lead-free terminations meet EU RoHS requirements. EU RoHS regulation is not intended for Pb-glass contained in electrode, resistor element and glass. AEC-Q200 Tested Type Dimensions inches (mm) (Inch Size Code) L Wc d t dimensions and construction 1E .020.002 .039.002 .006.002 .006.002 .014.002 (0204) (0.50.05) (1.00.05) (0.150.05) (0.150.05) (0.350.05) L c c 1J .031.004 .063.004 .006.004 .008.004 .018.004 (0306) (0.80.1) (1.60.1) (0.150.1) (0.20.1) (0.450.1) W 2A .049.006 .079.006 .012.008 .014.008 .022.004 (0508) (1.250.15) (2.00.15) (0.30.2) (0.350.2) (0.550.1) 2B .063.006 .126.008 .012.008 .018.006 Solder Plating (0612) (1.60.15) (3.20.2) (0.30.2) (0.450.15) Ni t 2H .098.006 .197.006 .016.008 Plating Inner (1020) (2.50.15) (5.00.15) (0.40.2) Electrode .024.004 Resistive d Film 2J .122.006 .181.006 .016.008 (0.60.1) .030.006 Protective (1218) (3.10.15) (4.60.15) (0.40.2) Coating Ceramic (0.750.15) Substrate 3A .122.006 .252.006 .018.008 (1225) (3.10.15) (6.30.15) (0.450.2) Derating Curve WK73R2B (1W), WK73R3A (2W) 100 100 100 2J (100C) 80 80 80 2B, 3A (115C) 60 60 1E, 1J, 2A, 2B, 60 2H, 3A (125C) 40 40 40 20 20 20 0 0 0 -60 -40 -200420060 80 100 120 140 160 -60 -40 -20 0 20 40 60 80 100 120 140 160 -60 -40 -20 0 20 40 60 80 100 120 140 160 -55 70 155 -55 125 155 -55 115 155 Ambient Temperature Terminal Part Temperature Terminal Part Temperature (C) (C) (C) For resistors operated at an ambient temperature For resistors operated terminal temperature of described for each size or above, a power rating of 70C or above, a power rating shall be derated shall be derated in accordance with the derating curve above. in accordance with the above derating curve. Please refer to Introduction of the derating curve based on the terminal part temperature in the beginning of our catalog before use. If you want to use at rated power (*1), use derating curves based on the terminal part temperature on the right side graph. ordering information WK73R 2J T TE 33L0 F Termination Nominal Resistance Type Size Packaging Material Resistance Tolerance TP: 0204: 7 2mm pitch WK73R 1E: 0.33W T: Sn 1%: 3 significant figures + 1 D: 0.5% punched paper multiplier R indicates decimal 1J: 0.5W F: 1% TD: 0306, 0508, 0612: 7 on value <100 2A: 0.75W, 1W J: 5% 4mm pitch punched paper 5%: 2 significant figures + 1 2B: 0.75W, 1W TE: 1020, 1218, 1225: multiplier R indicates decimal 2H: 1W 7 embossed plastic on values <10 For further information on 2J: 1W All values less than 0.1 packaging, please refer 3A: 1.5W, 2W (100m) are expressed in m to Appendix A with L as decimal. Ex: 33m, 1% = 33L0 Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/17/19 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 31 % Rated Power % Rated Power % Rated Power resistorsresistors WK73R wide terminal type flat chip resistors applications and ratings Rated Rated Resistance Range () Maximum Maximum Operating Part Power T.C.R. Ambient Terminal Working Overload Temp. -6 Designation Rating (X 10 /K) D0.5% F1% J5% Temp. Part Temp. Voltage Voltage Range E-24/E-96 E-24/E-96 E-24 1 100 WK73R1E 0.33W 70C 125C 10 -1M 10 - 1M 75V 100V 1 70C 100 10 - 1M 10 - 1M WK73R1J 0.5W 125C 150V 200V 1 100 0.75W 70C 125C 20.5k - 1M 22k - 1M WK73R2A 200V 400V 1 1.0W 70C 125C 100 10 - 20k 10 - 20k 0.75W 70C 125C 100 10 - 1M 10 - 1M 10 - 1M 200V 400V WK73R2B 1 100 10 - 9.76k 1.0W 70C 115C 10 - 9.76k 10 - 9.1k -55C 100 to 10 - 430k 10 - 430k WK73R2H 200V 400V 1.0W 70C 125C +155C 200 432k - 1M 470k - 1M 100 10 - 510k 10 - 510k 1.0W 70C 100C 200V 400V WK73R2J 200 511k - 1M 560k - 1M 10 - 330k 10 - 330k 100 1.5W 70C 125C 200 332k - 1M 360k - 1M 200V 400V WK73R3A 10 - 330k 10 - 330k 100 1 2.0W 70C 115C 200 332k - 1M 360k - 1M Rated voltage = Power rating x resistance value or max. working voltage, whichever is lower 1 If you want to use at rated power use derating curves based on the terminal part temperature on the right side graph located on previous page. If any questions arise whether to use the Rated Ambient Temperature or the Rated Terminal Part Temperature, please give priority to the Rated Terminal Part Temperature. For more details refer to the Introduction of the derating curves based on the terminal part temperature in the beginning of the catalog environmental applications Temperature Rise One-Pulse Limiting Electric Power WK73R 2B-3A WK73R 1E-1J WK73R 2A-2B WK73R 1E-2A 1000 100 100 140 2A 1J 120 2B 80 1E 2A 10 1J 100 2B 1E 100 60 80 2A 1J 1E 60 1 40 40 3A 10 2H/2J 20 2B 20 (10-3.3k) 0.1 2B (3.6k-1M) 0 10720 30540060080 90 100 0 10 20 30540060 70 80 90 100 1 0.01 .001 .01 .111 1000 1000 Power Rating Power Rating .001 .01 .111 1000 1000 (%) (%) Pulse Duration (ms) WK73R 2H-3A Regarding the temperature rise, The maximum applicable voltage is equal to the max. overload 140 the value of the temperature varies 3A voltage. Please ask us about the resistance characteristic of 120 2H/2J Measurement condition per conditions and board for use 3A Room temperature: 25C continuous applied pulse. The pulse endurance values are not 100 2H/2J PCB: FR-4t = 1.6mm since the temperature is measured assured values, so be sure to check the products on actual Cu foil thickness: 35m 80 under our measuring conditions. Hot spot equipment when you use them. 60 Terminal 40 20 0 10 20 30540060 70 80 90 100 Power Rating (%) Performance Characteristics Requirement R (%+0.005) Parameter Limit Typical Test Method Within specified Resistance 25C tolerance Within specified T.C.R. +25C/-55C and +25C/+125C T.C.R. WK73R1E (0.33W), WK73R1J (0.5W), WK73R2A (0.75W, 1W)WK73R3A (2W): Rated Overload (Short time) 2% 0.2% voltage x2.0 for 5 seconds. WK73R2B, R2H, R2J, R3A: Rated voltage x2.5 for 3 seconds Resistance to Solder Heat 1% 0.2% 260C 5C, 10 seconds 1 second Bending Test 1% 0.1% Holding point 90mm, Bending 1 time, Bending 5mm Rapid Change of Temperature 0.5% 0.3% -55C (30 minutes), +125C (30 minutes), 100 cycles 3%: 1E 1%: 1E Moisture Resistance 40C 2C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 2%: All others 0.2%: All others 3%: 1E 1%: 1E Endurance at 70C 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 2%: All others 0.2%: All others 1% High Temperature Exposure 0.2% +155C, 1000 hours Additional environmental applications can also be found at www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/10/20 32 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) One-Pulse Limiting Electric Power (W) One-Pulse Limiting Electric Power (W)