NT73 negative tempco thermistor EU features thermal protection * Twelve standard resistance values * Marking: 1J no marking on pink body, 2A and 2B black three digit on pink 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 (Inch Size Code) W Solder Plating Ni Plating t d Protective Coating L Dimensions inches (mm) W c d t 1J (0603) .063.008 .031.004 .012.004 .012.004 (1.60.2) (0.80.1) (0.30.1) (0.30.1) .02.004 (0.50.1) 2A (0805) .079.008 .049.004 .016.008 (2.00.2) (1.250.1) (0.40.2) .012 +.008 -.004 +0.2 ) -0.1 +.008 -.004 (0.5 +0.2 -0.1 ) 2B (1206) .126.008 .063.008 (3.20.2) (1.60.2) .016 +.008 -.004 +0.2 ) -0.1 .024.004 (0.60.1) Resistive Inner Film Electrode .02.008 (0.50.3) (0.3 (0.4 .02 Ceramic Substrate ordering information New Part # NT73 Type 2A T Size Code 1J: 0603 2A: 0805 2B: 1206 Termination Material T: Sn (Other termination styles may be available, please contact factory for options) TD Packaging TD: 7" paper tape (5,000 pieces/reel) 103 K 3800 J Nominal Resistance 2 significant figures + 1 multiplier Resistance Tolerance J: 5% K: 10% L: 15% B Constant Nominal 3200 3500 3700 3800 3950 4100 B Constant Tolerance H: 3% J: 5% K: 10% applications and ratings Part Designation NT731J NT732A Resistance @ 25C 6.8k 10k 15k 10k 20k 22k 30k 33k 47k 68k 100k 47k 1k 2k 2.2k 2.4k 3.3k 4.7k 5k Resistance Tolerance B Constant @ 25C/75C 3500K 3800K 3700K J: 5% K: 10% K: 10% L: 15% J: 5%; K: 10% L: 15% B Constant Tolerance Power Rating (mW) Operating Temperature Range 10% 5% 3% 5 3800K 5% 4100K 3200K 3% -55C to +125C 10% 5 3500K 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. 160 12/30/10 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com NT73 negative tempco thermistor Part Designation Resistance @ 25C Resistance Tolerance B Constant @ 25C/75C B Constant Tolerance 6.8k 10k 15k 10k 20k 22k 30k 33k 47k 68k 100k 150k 50k 10k 15k 20k 22k 30k 33k 47k 68k 100k 150k 1k 2.2k 3.3k 4.7k 6.8k 10k 22k 33k 47k 68k 100k K:10%; L: 15% 3800K 3500K 10% 3800K 5% NT732A NT732B J: 5% K: 10% L: 15% Operating Temperature Range Power Rating (mW) 5 3950K -55C to +125C 3% 4100K 3200K K: 10% L: 15% 3500K J: 5% K: 10% L: 15% 3800K 10% 5 5% Thermal dissipation constant - in the atmosphere - (reference) 1J: 2.0mW/C, 2A: 2.8mW/C, 2B: 3.0mW/C environmental applications Temperature Characteristics RT/R25 Ratio vs. B Constant Resistance () 1,000,000 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 100k 100,000 10k 10,000 3800k 1k 1,000 3800k 100 10 -50 Resistance 1k 5k 10k 100k 10k Resistance 1k 5k 10k 100k 10k B Constant 3200K 3500K 3700K 3800K 4100K B Constant 3200K 3500K 3700K 3800K 4100K k k k k k k k k Temp. (C) Temp. (C) 10,000,000 3200k -25 0 50 75 25 Temperature (C) 100 125 38770 28840 21706 16517 12698 9857.0 7721.2 6100.5 4858.7 3899.0 3151.3 2564.2 2099.9 1730.0 1433.5 1194.2 1000.0 841.48 711.39 273.24 197.67 144.85 107.43 80.577 61.077 46.759 36.137 28.173 22.147 17.546 14.004 11.256 9.1063 7.4135 6.0712 5.0000 4.1398 3.4451 638.23 465.81 343.25 255.22 191.37 144.64 110.13 83.710 64.190 49.640 38.680 30.370 23.970 19.070 15.270 12.320 10.000 8.1700 6.7100 7692.5 5414.6 3864.5 2794.3 2045.2 1514.1 1133.0 856.49 653.63 503.31 390.86 305.97 241.34 191.73 153.36 123.46 100.00 81.470 66.739 1203.1 820.76 568.09 398.57 283.20 203.64 148.07 108.37 80.182 59.943 45.252 34.478 26.473 20.506 16.016 12.608 10.000 7.9880 6.4242 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 604.07 515.10 441.00 379.00 326.90 282.95 245.72 214.08 187.08 163.96 144.11 127.00 112.21 99.377 88.224 78.501 70.004 62.558 2.8809 2.4202 2.0421 1.7302 1.4718 1.2568 1.0771 0.92637 0.79937 0.69199 0.60087 0.52329 0.45701 0.40016 0.35129 0.30915 0.27272 0.24114 5.5500 4.6100 3.8500 3.2300 2.7200 2.3100 1.9700 1.6800 1.4500 1.2500 1.0800 0.94000 0.82000 0.72000 0.63000 0.56000 0.49000 0.44000 54.959 45.484 37.823 31.594 26.506 22.330 18.886 16.035 13.663 11.682 10.022 8.6257 7.4466 6.4466 5.5968 4.8721 4.2523 3.7207 5.1999 4.2349 3.4692 2.8585 2.3682 1.9721 1.6504 1.3877 1.1724 0.99491 0.84926 0.72802 0.62662 0.54156 0.46982 0.40906 0.35741 0.31332 Performance Characteristics Parameter Resistance Requirement R (%+0.05) Limit Typical Within specified tolerance -- B Constant Within specified tolerance -- Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Load Life High Temperature Exposure 1%, 2%:1k 3.0% 3.0% 3.0% 3.0% 0.5%, 1%:1k 1.3% 1.1% 2.5% 1.6% Test Method 25C +25C/+75C 260C 5C, 10 seconds 1 second -55C (30 minutes),+125C (30 minutes), 50 cycles 40C 2C, 90 - 95% RH, 1000 hours 80C 3C, DC5mW, 1000 hours 80C, 1000 hours Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 80C. 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 7.0% 500V 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. 12/30/10 KOA Speer Electronics, Inc. * 199 Bolivar Drive * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com 161 thermal protection applications and ratings (continued)