resistors 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) Marking: Indigo body color with white marking 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 a a D1E W Ni Plating h b Protective Coating Resistive Inner Film Electrode Ceramic Substrate a UR73D L a Solder Plating b Ni Plating Resistive Film Ceramic Protective Substrate Coating Inner Electrode ordering information New Part # UR73 Type UR73 UR73D 2A Power Rating 1E: 0.125W 1J: 0.2W 2A: 0.25W 2B: 0.5W 2H: 0.75W 3A: 1W D1J T Termination Material T: Sn Resistance Range (Ω) 24m ~ 100m Dimensions inches (mm) W h a L b +.004 .039 +.004 -.002 .020 -.002 +0.1 ) (1.0 -0.05 .016±.002 .010±.004 .012±.004 +0.1 ) (0.4±0.05) (0.25±0.1) (0.3±0.1) (0.5 -0.05 .022±.004 +.005 10m ~ 27m .063±.008 .031 -.004 .02±.004 .014±.004 (0.55±0.1) +0.15 30m ~ 100m (1.6±0.2) (0.8 (0.5±0.1) (0.35±0.1) .014±.004 -0.1 ) (0.35±0.1) D2A 10m ~ 16m .079±.008 .049±.008 .022±.004 .016±.008 18m ~ 30m (2.0±0.2) (1.25±0.2) (0.55±0.1) (0.4±0.2) 2A 33m ~ 100m .079±.008 .049±.008 .02±.004 .016±.008 D2B W h Size Code 2B (2.0±0.2) (1.25±0.2) (0.55±0.1) (0.4±0.2) .024±.008 (0.6±0.2) .02±.008 (0.5±0.2) .012 +.008 -.004 (0.3 +0.2 -0.1 ) .039±.008 10m ~ 16m .126±.008 .063±.008 .024±.004 .020±.008 (1.0±0.2) 18m ~ 27m (3.2±0.2) (1.6±0.2) (0.6±0.1) (0.5±0.2) .031±.008 (0.8±0.2) 30m ~ 100m .126±.008 .063±.008 .024±.004 .020±.012 (3.2±0.2) (1.6±0.2) (0.6±0.1) (0.5±0.3) .016 +.008 -.004 (0.4 +0.2 -0.1 ) D2H .063±.012 10m ~ 30m .197±.008 .098±.008 .026±.004 .026±.012 (1.6±0.3) 33m ~ 100m (5.0±0.2) (2.5±0.2) (0.65±0.1) (0.65±0.3) .026±.012 (0.65±0.3) D3A .079±.012 10m ~ 30m .248±.008 .122±.008 .024±.004 .031±.012 (2.0±0.3) 33m ~ 100m (6.3±0.2) (3.1±0.2) (0.6±0.1) (0.8±0.3) .031±.012 (0.8±0.3) TD Packaging TP: 2mm pitch punch paper (1E) TD: 7" punched paper tape (1J, 2A, 2B) TE: 7" embossed plastic (2H, 3A) R100 Nominal Resistance All values less than 0.1Ω (100mΩ) are expressed in mΩ with “L” as decimal. Ex: 20mΩ = 20L0 F Tolerance F: ±1% 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. 50 1/10/11 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com current sensing chip resistor applications and ratings UR73D1E** 1/8W (.125W) UR73D1J 1/5W (.2W) UR73D2A T.C.R. (ppm/°C) Max. Resistance Range ±100 30mΩ - 100mΩ ±500 24mΩ - 27mΩ ±100 47mΩ - 100mΩ 1/4W (.25W) UR732A 1/4W (.25W) UR73D2B 1/2W (.5W) UR732B 1/2W (.5W) UR73D2H 3/4W (.75W) UR73D3A 1W (1W) Absolute Maximum Working Voltage F (±1%) E-24, 25mΩ, 50mΩ ±200 30mΩ - 43mΩ ±300 10mΩ - 27mΩ ±250 10mΩ - 30mΩ ±100 47mΩ - 100mΩ ±250 33mΩ - 43mΩ ±200 10mΩ - 27mΩ ±100 47mΩ - 100mΩ ±200 30mΩ - 43mΩ ±250 10mΩ - 30mΩ ±100 33mΩ - 100mΩ ±250 10mΩ - 30mΩ ±100 33mΩ - 100mΩ — 80°C 85°C √P•R % Rated Power 80 % Rated Power 100 60 40 20 0 -60 -40 -55 60 90°C 95°C ** Please contact factory prior to use Surface Temperature Rise D1J/0.2W (80°C) 2B/0.5W, D2A/0.25W, D2B/0.5W (85°C) 2A/0.25W, D2H/0.33W (90°C) D3A/1W (95°C) 0 20 40 60 80 70 Ambient Temperature (°C) For resistors operated at an ambient temperature of 70°C or above, a power rating shall be derated in accordance with the above derating curve. 0 60 80 100 120 140 85 90 95 125 Terminal Part Temperature (°C) 20 40 For resistors operated at a terminal part temperature of described for each size or above, a power rating shall be derated in accordance with the derating curve. Please refer to “Introduction of the derating curve based on the terminal part temperature” on the beginning of our catalog before use. Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Requirement ∆ R ±(%+0.005Ω) Limit Typical Within specified — tolerance Within specified — T.C.R. ±2% ±0.5% Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Endurance at 70°C ±1% ±1% ±2% ±0.3% ±0.5% ±1% ±2% ±1% High Temperature Exposure ±1% ±0.3% UR73D 1J, 2A, 2B, 2H, 3A 10mΩ UR73D 1E 24mΩ 100 3A (1) 40 0 -60 -40 -20 -55 100 120 140 125 UR73 2A, 2B 33mΩ 100 20 -20 -55°C to +125°C 70°C 85°C environmental applications Derating Curve 80 90°C √P•R x 2.5 85°C * Power rating is guaranteed by the Temperature Rise data shown below 100 Maximum Rated Rated Operating Overload Terminal Ambient Temperature Voltage Part Temp. Temperature Range (5 sec. max.) 75 2B (1) 2B (2) 2A (1) 50 2A (2) 25 0 0 25 50 75 Temperature Rise (°C) Power* Rating Temperature Rise (°C) Part Designation 100 2H (1) 75 3A (2) 2H (2) 2B (1) 2B (2) 50 2A (1) 1J (1) 1E (1) 2A (2) 1J (2) 1E (2) 25 0 0 25 50 75 100 % Power Rating % Rated Power 1 1 2 2 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. Test Method 25°C +25°C/+55°C and +25°C/+125°C Rated voltage x 2.5 for 5 seconds 260°C ± 5°C, 10 ± 1 second -55°C (30 minutes), +125°C (30 minutes), 100 cycles 40°C ± 2°C, 90%~95%RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle +125°C, 1000 hours Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 11/13/14 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 51 resistors UR73