current sense WK73S higher power, 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 1% 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 dimensions and construction L c c Type Dimensions inches (mm) (Inch Size Code) L Wc d t W 2B15 .063.006 .126.008 .012.008 .018.006 (0612) (1.60.15) (3.20.2) (0.30.2) (0.450.15) Solder Plating 2H2 .098.006 .197.006 .016.008 .024.004 Ni t Plating (1020) (2.50.15) (5.00.15) (0.40.2) (0.60.1) Inner .030.006 Electrode Resistive (0.750.15) d Film Protective 3A3 .122.006 .252.006 .018.008 Coating Ceramic (1225) (3.10.15) (6.30.15) (0.450.2) Substrate Derating Curve 100 80 60 For resistors operated terminal temperature of described for each size or above, a power rating shall be derated in accordance with the derating curve above. 40 Please refer to Introduction of the derating curve based on the terminal part temperature in the beginning of our catalog before use. 20 0 -60 -40 -20 0 20 40 60 80 100120 140 160 -55 95 155 Terminal Part Temperature (C) ordering information WK73S 2H2 T TE 33L0 F Termination Nominal Resistance Type Size Packaging Material Resistance Tolerance T: Sn TD: 0612: 7 4mm pitch WK73S 2B15: 1.5W 0.5%, 1%: 3 significant figures D: 0.5% punched paper + 1 multiplier R indicates decimal 2H2: 2W F: 1% TE: 1020, 1225: 7 4mm pitch on value <100 3A3: 3W J: 5% embossed plastic 5%: 2 significant figures + 1 For further information on multiplier R indicates decimal packaging, please refer to on values <10 Appendix A All values less than 0.1 (100m) are expressed in m 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. 10/25/18 116 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com % Rated Power WK73S higher power, wide terminal type flat chip resistors applications and ratings Rated Rated Resistance Range () Maximum Maximum Operating Terminal Part Power T.C.R. Ambient Working Overload Temp. -6 Part Designation Rating (X 10 /K) D0.5% F1% J5% Temp. Voltage Voltage Range Temp. E-24/E-96 E-24/E-96 E-24 100 430m - 9.76 430m - 9.76 430m - 9.1 WK73S2B15 200 30m - 422m 30m - 390m 200V 400V 1.5W 70C 95C 800 10m - 27m 100 220m - 9.76 220m - 9.1 -55C 1 WK73S2H2 200 27m - 215m 27m - 200m 200V 400V 2.0W 70C 95C to 800 10m - 24m +155C 100 360m - 9.76 360m - 9.1 200 33m - 357m 33m - 330m 3.0W 70C 95C WK73S3A3 200V 400V 300 22m - 32.4m 22m - 30m 800 10m - 20m Rated voltage = Power rating x resistance value environmental applications Temperature Rise One-Pulse Limiting Electric Power WK73S 2A-3A WK73S 2A-2B 1J WK73S 2H-3A 1000 140 140 2A 3A 120 120 2B 2H/2J 2A 3A 100 100 2B 2H/2J 100 80 80 60 60 3A 10 40 40 2H/2J 2B 2A 20 20 1 0 0 10 20 30540060 70 80 90 100 10 20 30540060 70 80 90 100 .001 .01 .1 1 10 100 1000 Power Rating 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 2.0 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% 1% -55C (30 minutes)/ +125C (30 minutes), 1000 cycles Moisture Resistance 2% 0.2% 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 High Temperature 2%: J (5%) 0.5%: J (5%) +155C, 1000 hours Exposure 1%: all others 0.2%: all others 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 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 117 Temperature Rise (C) Temperature Rise (C) One-Pulse Limiting Electric Power (W) current sense