thermal sensors LT73 linear positive tempco thermistor EU features Anti-leaching nickel barrier terminations Twenty-five specifiable temperature characteristics SMD thin film resistor with thermo-perceptivity Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction L Type Dimensions inches (mm) c c (Inch Size Code) L Wc d t +.008 .012 2A .079.008 .049.008 .016.008 -.004 .02.004 W (0805) (2.00.2) (1.250.2) (0.40.2) +0.2 (0.50.1) (0.3 ) Solder -0.1 Plating +.008 .016 2B .063.008 .126.008 .02.008 -.004 .024.004 Ni t (1206) (1.60.2) +0.2 (3.20.2) (0.50.3) (0.60.1) Plating (0.4 ) -0.1 d Protective Resistive Inner Coating Film Electrode Ceramic Substrate ordering information LT73 2B T TD 101 J 1000 Size Termination Resistance Type Packaging Tolerance T.C.R. Code Material Value 2A: 0805 T: Sn TD: 7 paper taping 2 significant G:2% (5,000 pieces/reel) figures + 1 2B: 1206 (Other termination J: 5% multiplier styles available, TE: 7 embossed plastic contact factory (4,000 pieces/reel) for options) applications and ratings Maximum Maximum Thermal Thermal Operating Part Power Rated Ambient Working Overload Time Dissipation Temperature Designation Rating Temperature Voltage Voltage Constant Constant Range LT732A 0.1W 50V 100V 1.0s 1.37mW/C -40C +70C to +125C LT322B 0.125W 75V 150V 1.5s 1.47mW/C Thermal time constant and dissipation constant are reference values, which are values of elements and vary with connecting or fixing methods. 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. 11/29/17 232 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com LT73 linear positive tempco thermistor applications and ratings Resistance Range T.C.R. T.C.R. Resistance E-24 -6 (x10 /K) Tolerance Tolerance LT732A LT732B -6 150, 250, 350, 450, 500 100x10 /K 2k - 24k 2k - 51k G: 2% -6 600, 700, 800, 900 150x10 /K 1k - 20k 1k - 43k 1000, 1200, 1400 1k - 13k 1k - 27k 15% 1600, 1800 510 - 4.7k 1k - 10k 2000, 2200, 2400 510 - 4.7k 510 - 9.1k J: 5% 2600, 2800, 3000 510 - 3.0k 510 - 6.2k 3300, 3600, 3900 10% 510 - 3.0k 510 - 6.2k 4200 100 - 1k 100 - 2k 4500 51 - 510 51 - 510 T.C.R. Measuring Temperature: +25C ~ +75C Rated voltage = Power Rating x Resistance value or Max. working voltage, whichever is lower. environmental applications Examples of Temperature Derating Curve Characteristics of Resistance 100 60 50 4500ppm/C 80 40 3300ppm/C 30 2400ppm/C 60 20 1600ppm/C 10 40 0 For resistors operated at an ambient temperature -10 20 of 70C or above, a power rating shall be derated -20 in accordance with the above derating curve. 0 -30 -40 -20 020 40 60 80 100 120 140 -50 -25 025 50 75 100 125 70 125 Ambient Temperature Ambient Temperature (C) (C) Approximate Expression for Resistance-Temperature Characteristics Values are not guaranteed but typical. T.C.R. 2 C C C -6 0 1 2 RT=R25 (C0+C1T+C2T ) RT: TC RT: Resistance value at TC (x10 /K) R25: 25C R25: Resistance value at 25C -6 3000 0.9288 0.0028 1.9983 x 10 -6 T: (C) T: Ambient temperature (C) 3300 0.9232 0.0030 2.9980 x 10 -6 C0, C1, C2: C0, C1, C2: Constants 3600 0.9175 0.0032 4.0000 x 10 -6 3900 0.9099 0.0035 4.0064 x 10 -6 4200 0.9026 0.0038 3.9964 x 10 -6 4500 0.8948 0.0041 4.0064 x 10 Performance Characteristics Requirement R (% + 0.05) Parameter Limit Typical Test Method Within specified Resistance 25C tolerance Within specified T.C.R. +25C/+75C T.C.R. Overload (Short time) 1.0% 0.23% Rated voltage x 2.5 or maximum overload volume for 5 seconds, whichever is lower Resistance to Solder Heat 1.0% 0.1% 260C 5C, 10 seconds 1 second Rapid Change of Temperature 1.0% 0.1% -40C (30 minutes)/ +125C (30 minutes), 5 cycles Moisture Resistance 3.0% 0.54% 40C 2C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Endurance at 70C 3.0% 0.62% 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 70C. Please pay attention not to be applied ESD, it may cause of resistance change. Actual Value (Out of Guarantee) Test Items Reference Test Method Low Temperature Exposure 0.05% -40C, 45 minutes High Temperature Exposure 0.6% 125C, 1000 hours ESD 500V Human Body Model, 100 pF 1.5 k Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 3/16/17 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 233 % Rated Power Resistance Changing Rate ( R) thermal sensors