current sense UR73 current sensing chip resistor EU features Very low resistance, high precision reliability Utilization of thick film Low T.C.R. achieved (100 ppm/C) 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. dimensions and construction UR73 L Dimensions inches (mm) Size a a Resistance Code L W h a b Range () W +.004 +.004 .039 .020 D1E -.002 -.002 .016.002 .010.004 .012.004 24m ~ 100m (0402) +0.1 +0.1 (0.40.05) (0.250.1) (0.30.1) (1.0 ) (0.5 ) Ni h -0.05 -0.05 Plating +.005 .022.004 b Protective Resistive Inner .031 Coating Film Electrode 10m ~ 27m D1J -.004 .063.008 .02.004 .014.004 (0.550.1) Ceramic (0603) +0.15 30m ~ 100m (1.60.2) (0.50.1) (0.350.1) .014.004 (0.8 ) Substrate -0.1 (0.350.1) UR73D L a a .024.008 10m ~ 16m D2A (0.60.2) .079.008 .049.008 .022.004 .016.008 (0805) 18m ~ 30m (2.00.2) (1.250.2) (0.550.1) (0.40.2) .02.008 W (0.50.2) +.008 Solder .012 Plating 2A -.004 .079.008 .049.008 .02.004 .016.008 h Ni 33m ~ 100m (0805) +0.2 Plating (2.00.2) (1.250.2) (0.550.1) (0.40.2) (0.3 ) -0.1 b Resistive Inner Film Electrode Protective .039.008 Ceramic Coating Substrate 10m ~ 16m (1.00.2) D2B .126.008 .063.008 .024.004 .020.008 (1206) 18m ~ 27m (3.20.2) (1.60.2) (0.60.1) (0.50.2) .031.008 Derating Curve (0.80.2) 100 100 +.008 .016 D1J/0.25W (80C) 2B -.004 .126.008 .063.008 .024.004 .020.012 2B/0.5W, D2B/0.5W (85C) 30m ~ 100m 80 80 (1206) +0.2 D2A/0.33W, D2H/0.75W (90C) (3.20.2) (1.60.2) (0.60.1) (0.50.3) (0.4 ) D3A/1W (95C) -0.1 2A/0.33W (100C) 60 60 .063.012 40 40 10m ~ 30m D2H (1.60.3) .197.008 .098.008 .026.004 .026.012 (2010) 33m ~ 100m (5.00.2) (2.50.2) (0.650.1) (0.650.3) 20 .026.012 20 (0.650.3) 0 0 -60 -40 -200420060 80 100 120 140 -60 -40 -200420060 80 100120 140 .079.012 -55 70 125 -55 85 9095 125 10m ~ 30m Ambient Temperature Terminal Part Temperature D3A (2.00.3) .248.008 .122.008 .024.004 .031.012 (C) (C) (2512) 33m ~ 100m (6.30.2) (3.10.2) (0.60.1) (0.80.3) .031.012 For resistors operated at a terminal For resistors operated at an ambient (0.80.3) part temperature of described for each temperature of 70C or above, a power size or above, a power rating shall be derated in accordance with the derating curve. rating shall be derated 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 prior use. ordering information UR73 2A T TD R100 F Power Termination Nominal Type Packaging Tolerance Rating Material Resistance UR73 1E: 0.125W T: Sn TP: 2mm pitch R indicates decimal on F: 1% punch paper values = 100m UR73D 1J: 0.25W (1E) Ex: R100 = 100m 2A: 0.33W TD: 7 punched L indicates decimal on 2B: 0.5W paper tape values <100m 2H: 0.75W (1J, 2A, 2B) Ex: 10L0 = 10m 3A: 1W TE: 7 embossed plastic (2H, 3A) For further information on packaging, please refer to Appendix A. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 2/08/18 126 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com % Rated Power % Rated Power UR73 current sensing chip resistor applications and ratings Resistance Range Rated Rated T.C.R. Operating Part Power Ambient Terminal (ppm/C) Temperature Designation Rating F (1%) E-24, Temperature Part Temp. Max. Range 25m, 50m 100 30m - 100m UR73D1E 1/8W (.125W) 70C 500 24m - 27m 100 47m - 100m UR73D1J 1/4W (.25W) 70C 80C 200 30m - 43m 300 10m - 27m UR73D2A 1/3W (.33W) 70C 90C 250 10m - 30m 100 47m - 100m -55C UR732A 1/3W (.33W) 70C 100C 250 33m - 43m to +125C UR73D2B 1/2W (.5W) 70C 85C 200 10m - 27m 100 47m - 100m UR732B 1/2W (.5W) 85C 70C 200 30m - 43m 250 10m - 30m UR73D2H 3/4W (.75W) 70C 90C 100 33m - 100m 250 10m - 30m UR73D3A 1W (1W) 70C 95C 100 33m - 100m Rated voltage = PR If any questions should arise whether to use the Rated Ambient Temperature or the Rated Terminal Part Temperature, please give priority to the Rated Terminal Part Temperature. Prior to use and for more details refer to Introduction of the derating curves on the terminal part temperature in the beginning of the catalog. One-Pulse Limiting Electric Power environmental applications UR73/UR73D 1J-2B Temperature Rise 1000 UR73VD 1E-2A UR73VD 2B-3A UR73 2A-2B 40 100 70 2A (1) 2B (1) 100 3A (1) 1J (1) 60 1E (1) 2H (1) 2B (2) 80 2A (2) 3A (2) 30 2A (1) 1J (2) 50 2H (2) 10 1E (2) 2B (1) 60 2A (2) 40 2B (2) 20 2B 30 1 2A 40 1J 20 10 20 0.1 10 .001 .01 .1 1 10 100 1000 0 0 0 Pulse Duration 0 25 50 75 100 0 25 50 75 100 0 25 50 75 100 (ms) % Rated Power % Rated Power % Rated Power UR73/UR73D 2H-3A 10000 Regarding the temperature rise, the value of the temperature varies per conditions and board for use since the temperature is measured under our measuring conditions. 1000 UR73 UR73D Measurement condition Measurement condition 100 Room temperature: 25C Room temperature: 25C PCB: FR-4t = 1.6mm PCB: FR-4t = 1.6mm Cu foil thickness: 35m Cu foil thickness: 35m The maximum applicable voltage is equal 3A Hot spot 10 Hot spot to the max. overload voltage. Please 2H Terminal Terminal contact factory for resistance characteristics of continuous applied pulse. 1 .001 .01 .1 1 10 100 1000 Pulse Duration Performance Characteristics (ms) 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. Overload (Short time) 2% 0.5% Rated voltage x 2.5 for 5 seconds Resistance to Solder Heat 1% 0.3% 260C 5C, 10 1 second 1% 0.5% -55C (30 minutes), +125C (30 minutes), 100 cycles Rapid Change of Temperature 2% 1% 40C 2C, 90%~95%RH, 1000 hours, Moisture Resistance 1.5 hr ON, 0.5 hr OFF cycle Endurance at 70C 2% 1% 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle High Temperature Exposure 1% 0.3% +125C, 1000 hours Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 10/25/18 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 127 Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) One-Pulse Limiting Electric Power (W) One-Pulse Limiting Electric Power (W) current sense