LA73 thick film linear positive tempco thermistor EU features thermal protection * Twenty-five specifiable temperature characteristics * Marking: Black three-digit on orange body color * 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 L c Type c W Solder Plating Ni Plating t d Protective Coating L (Inch Size Code) Dimensions inches (mm) W c d t 1J (0603) .063.008 .031.004 .012.004 .012.004 .018.004 (1.60.2) (0.80.1) (0.30.1) (0.450.1) (0.30.1) 2A (0805) .079.008 .049.004 .016.008 (2.00.2) (1.250.1) (0.40.2) .012 2B (1206) .126.008 .063.008 (3.20.2) (1.60.2) .016 Resistive Inner Film Electrode .02.008 (0.50.3) (0.3 (0.4 +.008 -.004 +0.2 ) -0.1 .02.004 (0.50.1) +.008 -.004 +0.2 ) -0.1 .024.004 (0.60.1) Ceramic Substrate ordering information New Part # LA73 Type 1J T Size Code 1J: 0603 2A: 0805 2B: 1206 Termination Material T: Sn (Other termination styles available, contact factory for options) TD Packaging TD: 7" paper (5,000 pieces/reel) 101 Resistance Value 2 significant figures + 1 multiplier J 3300 Tolerance T.C.R. 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. 184 12/31/10 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com LA73 thick film linear positive tempco thermistor Thermal Rated Max. Part Dissipation Ambient Working Designation Constant Temp. Voltage (V) (mW/C) LA731J 7.6 LA732A 8.2 LA732B 9.0 25 50 +70C 50 Operating Temp. Range: -55C - +125C Resistance Range E-12 LA731J LA732A LA732B T.C.R. (ppm/C) Max. 1K - 10K 680 - 6.8K 470 - 4.7K 470 - 3.9K 330 - 2.7K 330 - 2.7K 220 - 1.8K 220 - 1.2K 100 - 1.2K 100 - 390 68 - 220 33 - 120 22 - 82 1K - 10K 680 - 6.8K 470 - 4.7K 470 - 3.9K 330 - 2.7K 330 - 2.7K 220 - 1.8K 220 - 1.2K 100 - 1.2K 100 - 390 68 - 220 33 - 120 22 - 82 1K - 10K 680 - 6.8K 470 - 4.7K 470 - 3.9K 330 - 2.7K 330 - 2.7K 220 - 1.8K 220 - 1.2K 100 - 1.2K 100 - 390 68 - 220 33 - 120 22 - 82 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3300 3600 T.C.R. Tolerance 200ppm/C 10% Resistance Tolerance J: 5% environmental applications Temperature Characteristics Resistance Changing Rate (R) Derating Curve 100 % Rated Power 80 60 40 20 0 -60 -40 -55 -20 0 20 40 60 80 70 Ambient Temperature (C) 100 120 140 125 40 3600ppm/C 30 3000ppm/C 20 2000ppm/C 10 1000ppm/C 0 -10 -20 -30 -40 -75 -50 -25 0 50 25 75 100 125 Ambient Temperature (C) Approximate Expression for Resistance-Temperature Characteristics T.C.R. (x10-6/K) C0 C1 C2 3000 3300 3600 0.926 0.918 0.910 0.00294 0.00325 0.00359 1.1 x 10-7 4.1 x 10-7 1.7 x 10-7 (Values are not guaranteed but typical) RT=R25 (C0+C1T+C2T2) RT: Resistance value at TC R25: Resistance value at 25C T: Ambient temperature (C) C0, C1, C2: Constants Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Endurance at 70C Requirement R (% + 0.1) Limit Typical Within specified -- tolerance Within specified -- T.C.R. 1.0% 0.5% 1.0% 0.5% 1.0% 0.5% 3.0% 1.5% 3.0% 1.5% Test Method 25C +25C/+75C Rated voltage x 2.5 or maximum working volume x 2 for 5 seconds, whichever is lower 260C 5C, 10 seconds 1 second -55C (30 minutes)/ +125C (30 minutes), 100 cycles 40C 2C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 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 High Temperature Exposure ESD Reference 3.0% 300V Test Method 125C, 1000 hours Human 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. 12/16/11 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com 185 thermal protection applications and ratings