LT73 linear positive tempco thermistor EU features Anti-leaching nickel barrier terminations Twenty-five specifiable temperature characteristics SMD thin film resistor with thermo-perceptivity Marking: Black four-digit on bronze body color Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction L c W Solder Plating Ni Plating t d Protective Coating Type 2A (0805) 2B (1206) Dimensions inches (mm) W c d L (Inch Size Code) c .079±.008 .049±.008 .016±.008 (2.0±0.2) (1.25±0.2) (0.4±0.2) .012 .126±.008 .063±.008 (1.6±0.2) (3.2±0.2) .016 .02±.008 (0.5±0.3) (0.3 (0.4 thermal protection • • • • • t +.008 -.004 +0.2 ) -0.1 .02±.004 (0.5±0.1) +.008 -.004 +0.2 ) -0.1 .024±.004 (0.6±0.1) Resistive Inner Electrode Film Ceramic Substrate ordering information New Part # LT73 2B T Size Code 2A: 0805 2B: 1206 Type Termination Material T: Sn (Other termination styles available, contact factory for options) TD 101 Packaging TD: 7" paper taping (5,000 pieces/reel) TE: 7" embossed plastic (4,000 pieces/reel) Resistance Value 2 significant figures + 1 multiplier J 1000 Tolerance T.C.R. G: ±2% J: ±5% applications and ratings Part Designation Power Rating LT732A Maximum Working Voltage Maximum Overload Voltage Thermal Time Constant Thermal Dissipation Constant 0.1W 50V 100V 1.0s 1.37mW/°C LT322B 0.125W 75V 150V 1.5s Rated Ambient Temperature Operating Temperature Range +70°C -40°C to +125°C 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. 12/19/12 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 201 LT73 linear positive tempco thermistor applications and ratings thermal protection T.C.R. (x10-6/K) T.C.R. Tolerance 150, 250, 350, 450, 500 600, 700, 800, 900 1000, 1200, 1400 1600, 1800 2000, 2200, 2400 2600, 2800, 3000 3300, 3600, 3900 4200 4500 ±100x10-6/K ±150x10-6/K Resistance Range E-24 LT732A LT732B 2kΩ - 24kΩ 1kΩ - 20kΩ 1kΩ - 13kΩ 510Ω - 4.7kΩ 510Ω - 4.7kΩ 510Ω - 3.0kΩ 510Ω - 3.0kΩ 100Ω - 1kΩ 51Ω - 510Ω ±15% ±10% Resistance Tolerance 2kΩ - 51kΩ 1kΩ - 43kΩ 1kΩ - 27kΩ 1kΩ - 10kΩ 510Ω - 9.1kΩ 510Ω - 6.2kΩ 510Ω - 6.2kΩ 100Ω - 2kΩ 51Ω - 510Ω G: ±2% J: ±5% T.C.R. Measuring Temperature: +25°C ~ +75°C Rated voltage = √Power Rating x Resistance value or Max. working voltage, whichever is lower. environmental applications Derating Curve Resistance Changing Rate (∆R) 100 % Rated Power 80 60 40 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. 20 0 -40 -20 0 20 40 60 80 70 Ambient Temperature (°C) Examples of Temperature Characteristics of Resistance 100 120 140 125 60 50 4500ppm/°C 40 3300ppm/°C 30 2400ppm/°C 20 1600ppm/°C 10 0 -10 -20 -30 -50 Approximate Expression for Resistance-Temperature Characteristics T.C.R. (x10-6/K) 3000 3300 3600 3900 4200 4500 Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Endurance at 70°C C0 C1 0.9288 0.9232 0.9175 0.9099 0.9026 0.8948 0.0028 0.0030 0.0032 0.0035 0.0038 0.0041 Requirement ∆ R ±(% + 0.05Ω) Limit Typical Within specified — tolerance Within specified — T.C.R. ±1.0% ±0.23% ±1.0% ±0.1% ±1.0% ±0.1% ±3.0% ±0.54% ±3.0% ±0.62% -25 0 25 50 75 100 125 Ambient Temperature (°C) C2 1.9983 2.9980 4.0000 4.0064 3.9964 4.0064 x x x x x x 10-6 10-6 10-6 10-6 10-6 10-6 Test Method 25°C +25°C/+75°C Rated voltage x 2.5 or maximum overload volume for 5 seconds, whichever is lower 260°C ± 5°C, 10 seconds ± 1 second -40°C (30 minutes)/ +125°C (30 minutes), 5 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 Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 70°C. Please pay attention not to be applied ESD, it may cause of resistance change. Actual Value (Out of Guarantee) Test Items Low Temperature Exposure High Temperature Exposure ESD Reference ±0.05% ±0.6% 500V Test Method -40°C, 45 minutes 125°C, 1000 hours Human Body Model, 100 pF 1.5 kΩ Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 202 11/20/14 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com