NT73 negative tempco thermistor EU • Twelve standard resistance values • Marking: 1J no marking on pink or green body B constant 3700K and 4100K green 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 (1.6±0.2) (0.8±0.1) (0.3±0.1) (0.3±0.1) .02±.004 (0.5±0.1) 2A (0805) .079±.008 .049±.004 .016±.008 (2.0±0.2) (1.25±0.1) (0.4±0.2) .012 +.008 -.004 +0.2 ) -0.1 +.008 -.004 (0.5 +0.2 -0.1 ) 2B (1206) .126±.008 .063±.008 (3.2±0.2) (1.6±0.2) .016 +.008 -.004 +0.2 ) -0.1 .024±.004 (0.6±0.1) Resistive Inner Film Electrode .02±.008 (0.5±0.3) (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 @ 25°C 6.8kΩ 10kΩ 15kΩ 10kΩ 20kΩ 22kΩ 30kΩ 33kΩ 47kΩ 68kΩ 100kΩ 47kΩ 1kΩ 2kΩ 2.2kΩ 2.4kΩ 3.3kΩ 4.7kΩ 5kΩ Resistance Tolerance B Constant @ 25°C/75°C 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% -55°C to +125°C ±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. 8/15/14 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 165 thermal protection features NT73 negative tempco thermistor applications and ratings (continued) Part Designation Resistance Tolerance B Constant @ 25°C/75°C B Constant Tolerance 6.8kΩ 10kΩ 15kΩ 10kΩ 20kΩ 22kΩ 30kΩ 33kΩ 47kΩ 68kΩ 100kΩ 150kΩ 50kΩ 10kΩ 15kΩ 20kΩ 22kΩ 30kΩ 33kΩ 47kΩ 68kΩ 100kΩ 150kΩ 1kΩ 2.2kΩ 3.3kΩ 4.7kΩ 6.8kΩ 10kΩ 22kΩ 33kΩ 47kΩ 68kΩ 100kΩ K:±10%; L: ±15% 3800K 3500K ±10% 3800K ±5% thermal protection Resistance @ 25°C NT732A NT732B J: ±5% K: ±10% L: ±15% Operating Temperature Range Power Rating (mW) 5 3950K -55°C to +125°C ±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 1,000,000 Resistance (Ω) Resistance 1k Ω 5k Ω 10k Ω 100k Ω 10kΩ Resistance 1k Ω 5k Ω 10k Ω 100k Ω 10kΩ B Constant 3200K 3500K 3700K 3800K 4100K B Constant 3200K 3500K 3700K 3800K 4100K kΩ kΩ kΩ kΩ Ω kΩ kΩ Ω kΩ kΩ Temp. (°C) Temp. (°C) 10,000,000 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 100kΩ 100,000 10kΩ 10,000 3800k 1kΩ 1,000 3800k 100 3200k 10 -50 -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 ±(%+0.05Ω) 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%:1kΩ ±3.0% ±3.0% ±3.0% ±3.0% ±0.5%, ±1%:1kΩ ±1.3% ±1.1% ±2.5% ±1.6% Test Method 25°C +25°C/+75°C 260°C ± 5°C, 10 seconds ± 1 second -55°C (30 minutes),+125°C (30 minutes), 50 cycles 40°C ± 2°C, 90 - 95% RH, 1000 hours 80°C ± 3°C, DC5mW, 1000 hours 80°C, 1000 hours Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 80°C. 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 125°C, 1000 hours Human 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. 166 12/30/10 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com