current sense WU73 wide terminal type low resistance, low T.C.R flat chip resistors EU features Wide terminal type flat chip resistor High reliability and performance with T.C.R. -6 75 x 10 /K, resistance tolerance 1% Suitable for flow and reflow solderings This product meets EU RoHS requirements. EU RoHS regulation is not intended for Pb-glass contained in electrode, resistor element and glass. AEC-Q200 Qualified dimensions and construction L Type Dimensions inches (mm) c c (Inch Size Code) L Wc d t +.004 2B .063.006 .126 -.012 .016.008 .018.006 .024.004 (1.60.15) +0.1 (0612) (0.40.2) (0.450.15) (0.60.1) ) W (3.2 -0.3 +.004 Ceramic Substrate 2B15 .063.006 .126 -.012 .016.008 .018.006 .024.004 (0612) (1.60.15) +0.1 (0.40.2) (0.450.15) (0.60.1) Sn Plating ) (3.2 -0.3 t Ni Plating d Inner Protective Resistive Electrode Coating Film Derating Curve WU73 2B15 (1.5W) 100 100 100 80 80 80 60 60 60 40 40 40 20 20 20 0 0 0 -60 -40 -20 0 20 40 60 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 -55 115 155 -55 95 155 Ambient Temperature Terminal Part Temperature Terminal Part Temperature (C) (C) (C) For resistors operated at an ambient temperature For resistors operated at a terminal part temperature of described for each size or above, the power of 70C or above, the power rating shall be derated rating shall be derated in accordance with the above derating curve. in accordance with the above derating curve. Please refer to the Introduction of the derating curves based on terminal part temperature in the beginning of the catalog. ordering information WU73 2B T TD 10L0 F Termination Nominal Resistance Type Size Packaging Material Resistance Tolerance WU73 2B: 1W T : Sn TD: 7 4mm pitch 4 digits: all values F: 1% punched paper less than 100m are 2B15: 1.5W expressed in m with L For further information on as decimal. Ex: 10m = packaging, please refer to 10L0 Appendix A Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 7/19/19 122 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 % Rated Power WU73 wide terminal type low resistance, low T.C.R flat chip resistors applications and ratings Rated Rated Resistance Operating Part Power T.C.R. Resistance Ambient Terminal Part Range () Temperature -6 Designation Rating (X 10 /K) Tolerance Temperature Temperature E-24, 25m, 50m Range 100 10m~12m -55C to WU732B 1.0W 70C 115C 75 13m~27m F: 1% +155C 100 30m~100m 100 10m~12m -55C to WU732B15 1.5W 95C 75 13m~27m F: 1% +155C 100 30m~100m Rated voltage = Power rating x resistance value 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. environmental applications Temperature Rise One-Pulse Limiting Electric Power WU73 2B/2B15 WU73 2B 1000 140 160 2B15 2B15 140 750 2B 120 2B 100 500 80 60 2B/2B15 40 250 20 1 0 10 20 30540060 70 80 90 100 .001 .01 .1 1 10 100 1000 Power Rating Pulse Duration (ms) (%) Measurement condition Regarding the temperature rise, the value of the temperature The maximum applicable voltage is equal to the max. Room temperature: 25C varies per conditions and board for use since the temperature overload voltage. Please contact factory for resistance PCB: FR-4t = 1.6mm Cu foil thickness: 35m is measured under our measuring conditions. characteristics of continuous applied pulse. Hot spot Terminal 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. Overload (Short time) 2% 0.2% Rated Voltage x 2 for 5 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 2% 0.3% -55C (30 minutes), +125C (30 minutes), 1000 cycles Moisture Resistance 2% 0.1% 40C 2C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Endurance at 70C 2% 0.2% 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 1% 0.1% High Temperature Exposure +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. 12/17/19 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 123 Temperature Rise (C) One-Pulse Limiting Electric Power (W) current sense