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| LR72A, B, C resistors metal plate current sense resistors EU features * * * * * Superior thermal expansion cycling Inductance less than 10nH Solderable pads (60/40 SnPb plate) Lead flexible for thermal expansion Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction W td L2 L L2 Copper Nickel Alloy Termination LR72A 3.75 size only LR72A Size Code LR72A (8.00) LR72A (5.00) LR72A (3.75) LR72A (2.50) L .39.004 (10.00.1) .39.004 (10.00.1) .39.004 (10.00.1) .39.004 (10.00.1) Dimensions inches (mm) L2 +0.1 W t -.02 .079 (2.0) .079 (2.0) .079 (2.0) .079 (2.0) .20.008 (5.20.2) .20.008 (5.20.2) .20.008 (5.20.2) .20.008 (5.20.2) .079 (2 Max.) .079 (2 Max.) .079 (2 Max.) .079 (2 Max.) d .006 (0.16) .009 (0.22) .013 (0.32) .019 (0.47) W td g L2 L g L2 Copper Nickel Alloy Termination Size Code LR72A (2.00) LR72B Dimensions inches (mm) W t d .20.008 .079 (5.20.2) (2 Max.) .118.008 .079 (3.00.2) (2 Max.) .027 (0.68) .026 (0.66) L .39.004 (10.00.1) .39.004 (10.00.1) L2 +0.1 -.02 g .043.008 (1.10.2) .043.008 (1.10.2) LR72A (2m) LR72B .079 (2.0) .079 (2.0) W Copper Nickel Alloy Termination d a L LR72C Size Code LR72C Dimensions inches (mm) W t a t L .44.016 (11.20.4) d .126.016 .137.016 .189.030 .093.010 (3.20.4) (3.50.4) (4.8.75) (2.35.25) ordering information New Part # LR72 Type A Size A B C D Termination Material D: SnAgCu (LR72C only) N: CuNi (non-presolder) (LR72A, B only) TE Packaging TE: 7" embossed plastic (LR72A, B) TEB: 13" embossed plastic (LR72C) 2L0 Nominal Resistance 2m: 2L0 "L" indicates the decimal in milliohms J Tolerance J: 5% 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. 12/16/08 42 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com LR72A, B, C metal plate current sense resistors applications and ratings Part Designation LR72A LR72B LR72C Power Rating 1/2W @ 25C 1/4W @ 25C 1W @ 70C T.C.R. (ppm/C) Max. 100 350 Standard Resistance 2m ~ 8m 3m ~ 5m 2m, 3m J: 5% Resistance Tolerance Rated Ambient Temperature +70C +85C Operating Temperature Range -40C to +180C -40C to +155C resistors environmental applications Derating Curve 100 LR72C 80 % Rated Power 60 40 LR72A, 72B 20 0 -40 0 80 120 160 200 70 85 155 180 Ambient Temperature (C) 40 Performance Characteristics Parameter Resistance T.C.R. Resistance to Solder Heat Moisture Resistance Load Life Requirement Within regulated tolerance Within specified T.C.R. 2.0% 5.0% 5.0% (A & B), 3% (C) Test Method (JIS C 5202) 25C Room temperature/100C up, LR72C: Room temperature/25C ~ 200C 350C 10C, 3 seconds; LR72C: 260C 5C, 10 seconds Power rating x 1/10, 40C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Rating voltage, 70C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/16/08 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com 43 |
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