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NTC热敏电阻阻值计算

Applicable : Ln (R(T)/R 25) = A +B/T +C/T 2+ D/T

3

laws 1/ T = A1 +B1 ln(R/R 25) +C1 [ln(R/R 25)]2+ D1 [ln(R/R 25)]

3

D R/R =(((1+ (D R/R)ref /100 )x(1 +(D R/R)bvalue /100)) - 1) x 100(D R/R)bvalue = D B x abs(1 /T - 1/T ref ) x 100

D B = B25/85 x (tolerance on B25/85 in %) /100

where abs means absolute value and T in kelvins ( °C +273.15)

material and B25/85D B25/85(%)

A

B

C T ≤ 25 °C

-14.633719574791.8420-115334

T > 25 °C -14.63371957

4791.8420

-115334A1

B1

C1

T ≤ 25 °C 0.0033540160.0002569850 2.620131E-06T > 25 °C

0.003354016

0.0002569850

2.620131E-06

Temperature step 1.0°C Initial temperature -40.0°C Reference temperature

25.0°C

Resistance at Tref (selected from table 1)

10000Ohm

Tolerance at Tref

5.0%B25/85 selected from table 1

3977

K

reference temperature:25°C reference resistance value:

10000

Ohm reference tolerance:

5%B25/85 value

3977K B25/85 value tolerance:

0.75

%

Temperature

Resistance D R/R a

D T Rmin [°C][Ohm](%)[%/K][K][Ohm]-40.033.20935672332093.5687.93-6.62 1.20305763.446-39.031.09028680310902.8697.87-6.57 1.20286431.003-38.029.11961359291196.1377.81-6.53 1.20268440.883-37.027.28608669272860.8687.76-6.48 1.20251692.142-36.025.57936988255793.7007.70-6.44 1.20236091.972-35.023.98996208239899.6227.65-6.39 1.20221555.009-34.022.50912559225091.2577.59-6.35 1.20208002.692-33.021.12882081211288.2097.54-6.31 1.20195362.690-32.019.84164691198416.4707.48-6.26 1.19183568.376-31.018.64078776186407.8787.43-6.22 1.19172558.346-30.017.51996282175199.6297.38-6.18 1.19162275.982-29.016.47338222164733.8237.32-6.14 1.19152669.061-28.015.49570603154957.0617.27-6.10 1.19143689.383-27.014.58200694145820.0707.22-6.06 1.19135292.446-26.013.72773627137277.3637.17-6.02 1.19127437.142-25.012.92869303129286.9317.12-5.98 1.19120085.483-24.012.18099551121809.9567.07-5.94 1.19113202.344-23.011.48105544114810.5557.02-5.90 1.19106755.238-22.010.82555432108255.544 6.97-5.86 1.19100714.101-21.010.21142179102114.218 6.92-5.82 1.1995051.101-20.09.6358158196358.158 6.87-5.78 1.1989740.459-19.09.0961045590961.046 6.82-5.75 1.1984758.291-18.08.5898498085898.498 6.77-5.71 1.1980082.455-17.08.1147917681147.918 6.72-5.67 1.1975692.419-16.07.6688350676688.351 6.68-5.63 1.1871569.132-15.07.2500360472500.361 6.63-5.60 1.1867694.916-14.0 6.8565909668565.910 6.58-5.56 1.1864053.352-13.0 6.4868252664868.253 6.53-5.53 1.1860629.191-12.0 6.1391836661391.837 6.49-5.49 1.1857408.262-11.0 5.8122211058122.211 6.44-5.46 1.1854377.391-10.0 5.5045943555045.944 6.40-5.42 1.1851524.325-9.0 5.2150543752150.544 6.35-5.39 1.1848837.665-8.0

4.94243922

49424.392

6.31

-5.35

1.18

46306.800

BCcomponents

mat A. with Bn=3977K

0.75

R(T)/R 25

-7.0 4.6856675646856.676 6.26-5.32 1.1843921.852 -6.0 4.4437326844437.327 6.22-5.28 1.1841673.616 -5.0 4.2156969942156.970 6.18-5.25 1.1839553.520 -4.0 4.0006869240006.869 6.13-5.22 1.1837553.567 -3.0 3.7978882437978.883 6.09-5.19 1.1735666.305 -2.0 3.6065417736065.418 6.05-5.15 1.1733884.779 -1.0 3.4259393634259.394 6.00-5.12 1.1732202.499

0.0 3.2554202132554.202 5.96-5.09 1.1730613.405

1.0 3.0943675430943.675 5.92-5.06 1.1729111.840

2.0 2.9422053429422.054 5.88-5.03 1.1727692.517

3.0 2.7983956027983.956 5.84-5.00 1.1726350.495

4.0 2.6624355126624.355

5.80-4.97 1.1725081.155

5.0 2.5338550725338.551 5.76-4.93 1.1723880.177

6.0 2.4122147524122.148 5.72-4.90 1.1722743.518

7.0 2.2971034122971.034 5.68-4.87 1.1621667.395

8.0 2.1881362821881.363 5.64-4.85 1.1620648.268

9.0 2.0849531720849.532 5.60-4.82 1.1619682.819

10.0 1.9872168019872.168 5.56-4.79 1.1618767.941

11.0 1.8946112218946.112 5.52-4.76 1.1617900.720

12.0 1.8068403418068.403 5.48-4.73 1.1617078.428

13.0 1.7236266417236.266 5.44-4.70 1.1616298.502

14.0 1.6447098716447.099 5.40-4.67 1.1615558.541

15.0 1.5698459115698.459 5.36-4.64 1.1514856.291

16.0 1.4988057114988.057 5.33-4.62 1.1514189.635

17.0 1.4313742714313.743 5.29-4.59 1.1513556.587

18.0 1.3673497313673.497 5.25-4.56 1.1512955.280

19.0 1.3065424913065.425 5.22-4.54 1.1512383.959

20.0 1.2487744212487.744 5.18-4.51 1.1511840.977

21.0 1.1938781211938.781 5.14-4.48 1.1511324.784

22.0 1.1416961911416.962 5.11-4.46 1.1510833.921

23.0 1.0920806410920.806 5.07-4.43 1.1410367.017

24.0 1.0448922510448.923 5.04-4.40 1.149922.782

25.0 1.0000000010000.000 5.00-4.38 1.149500.000

26.00.957280589572.806 5.04-4.35 1.169090.803

27.00.916617889166.179 5.07-4.33 1.178701.453

28.00.877902568779.026 5.10-4.30 1.198330.886

29.00.841031608410.316 5.14-4.28 1.207978.102

30.00.805907928059.079 5.17-4.25 1.227642.159

31.00.772439997724.400 5.21-4.23 1.237322.170

32.00.740541537405.415 5.24-4.21 1.257017.296

33.00.710131147101.311 5.27-4.18 1.266726.749

34.00.681132046811.320 5.31-4.16 1.286449.785

35.00.653471756534.718 5.34-4.13 1.296185.701

36.00.627081876270.819 5.37-4.11 1.315933.835

37.00.601897796018.978 5.41-4.09 1.325693.561

38.00.577858515778.585 5.44-4.06 1.345464.290

39.00.554906375549.064 5.47-4.04 1.355245.463

40.00.532986915329.869 5.50-4.02 1.375036.553

41.00.512048625120.486 5.54-4.00 1.384837.062

42.00.492042824920.428 5.57-3.97 1.404646.521

43.00.472923454729.235 5.60-3.95 1.424464.484

44.00.454646954546.469 5.63-3.93 1.434290.530

45.00.437172084371.721 5.66-3.91 1.454124.262

46.00.420459834204.598 5.69-3.89 1.463965.302

47.00.404473244044.732 5.72-3.87 1.483813.295

48.00.389177333891.773 5.75-3.84 1.503667.902

49.00.374538953745.389 5.78-3.82 1.513528.805

50.00.360526693605.267 5.81-3.80 1.533395.701

51.00.347110803471.108 5.84-3.78 1.543268.303

52.00.334263063342.631 5.87-3.76 1.563146.339

53.00.321956713219.567 5.90-3.74 1.583029.551

54.00.310166373101.664 5.93-3.72 1.592917.696

55.00.298867982988.680 5.96-3.70 1.612810.541

56.00.288038692880.387 5.99-3.68 1.632707.868

57.00.277656832776.568 6.02-3.66 1.642609.467

58.00.267701802677.018 6.05-3.64 1.662515.141

59.00.258154062581.541 6.08-3.62 1.682424.702

60.00.248995052489.951 6.10-3.60 1.692337.972

61.00.240207132402.071 6.13-3.58 1.712254.781

62.00.231773552317.735 6.16-3.56 1.732174.968

63.00.223678372236.784 6.19-3.55 1.752098.381

64.00.215906442159.064 6.22-3.53 1.762024.874

65.00.208443382084.434 6.24-3.51 1.781954.310

66.00.201275482012.755 6.27-3.49 1.801886.556

67.00.194389721943.897 6.30-3.47 1.811821.488

68.00.187773691877.737 6.32-3.45 1.831758.987

69.00.181415601814.156 6.35-3.44 1.851698.940

70.00.175304211753.042 6.38-3.42 1.871641.240

71.00.169428831694.288 6.40-3.40 1.881585.784

72.00.163779271637.793 6.43-3.38 1.901532.475

73.00.158345841583.458 6.46-3.37 1.921481.219

74.00.153119271531.193 6.48-3.35 1.941431.929

75.00.148090781480.908 6.51-3.33 1.951384.520

76.00.143251951432.519 6.53-3.31 1.971338.913

77.00.138594781385.948 6.56-3.30 1.991295.029

78.00.134111651341.116 6.59-3.28 2.011252.797

79.00.129795261297.953 6.61-3.26 2.031212.147

80.00.125638671256.387 6.64-3.25 2.041173.013

81.00.121635261216.353 6.66-3.23 2.061135.331

82.00.117778691177.787 6.69-3.21 2.081099.041

83.00.114062941140.629 6.71-3.20 2.101064.085

84.00.110482241104.822 6.74-3.18 2.121030.409

85.00.107031081070.311 6.76-3.17 2.14997.960

86.00.103704211037.042 6.78-3.15 2.15966.688

87.00.100496611004.966 6.81-3.13 2.17936.544

88.00.0974*******.035 6.83-3.12 2.19907.485

89.00.09442022944.202 6.86-3.10 2.21879.464

90.00.0915*******.425 6.88-3.09 2.23852.442

91.00.0887*******.660 6.90-3.07 2.25826.377

92.00.08608688860.869 6.93-3.06 2.27801.233

93.00.0835*******.012 6.95-3.04 2.28776.972

94.00.0810*******.053 6.97-3.03 2.30753.559

95.00.07859579785.9587.00-3.01 2.32730.962

96.00.0762*******.6927.02-3.00 2.34709.148

97.00.07402228740.2237.04-2.98 2.36688.087

98.00.0718*******.5217.07-2.97 2.38667.750

99.00.06975554697.5557.09-2.95 2.40648.108 100.00.06772993677.2997.11-2.94 2.42629.135 101.00.06577251657.7257.13-2.93 2.44610.805 102.00.06388071638.8077.16-2.91 2.46593.094 103.00.06205204620.5207.18-2.90 2.48575.978 104.00.06028413602.8417.20-2.88 2.50559.435 105.00.05857471585.7477.22-2.87 2.52543.443 106.00.05692159569.2167.24-2.86 2.54527.982 107.00.0553*******.2277.27-2.84 2.56513.031 108.00.0537*******.7607.29-2.83 2.58498.571 109.00.05227958522.7967.31-2.82 2.60484.585 110.00.05083161508.3167.33-2.80 2.62471.055 111.00.04943031494.3037.35-2.79 2.64457.964 112.00.04807398480.7407.37-2.78 2.66445.296 113.00.04676100467.6107.39-2.76 2.68433.036 114.00.0454*******.8987.41-2.75 2.70421.168 115.00.04425886442.5897.44-2.74 2.72409.680 116.00.04306676430.6687.46-2.72 2.74398.556 117.00.0419*******.1217.48-2.71 2.76387.784 118.00.04079358407.9367.50-2.70 2.78377.351 119.00.03970990397.0997.52-2.69 2.80367.246 120.00.03865982386.5987.54-2.67 2.82357.456 121.00.0376*******.4227.56-2.66 2.84347.970 122.00.03665585366.5587.58-2.65 2.86338.779 123.00.0356*******.9977.60-2.64 2.88329.871 124.00.03477275347.7287.62-2.62 2.90321.236 125.00.03387394338.7397.64-2.61 2.92312.866 126.00.03300232330.0237.66-2.60 2.94304.750 127.00.03215696321.5707.68-2.59 2.97296.881 128.00.0313*******.3697.70-2.58 2.99289.249 129.00.03054144305.4147.72-2.57 3.01281.847 130.00.029********.6967.74-2.55 3.03274.667 131.00.029********.2067.76-2.54 3.05267.701 132.00.028********.9377.77-2.53 3.07260.941 133.00.027********.8827.79-2.52 3.09254.382 134.00.02690335269.0347.81-2.51 3.11248.016 135.00.02623845262.3847.83-2.50 3.14241.837 136.00.025********.9287.85-2.49 3.16235.839 137.00.024********.6597.87-2.47 3.18230.015 138.00.024********.5707.89-2.46 3.20224.360 139.00.023********.6567.91-2.45 3.22218.868 140.00.023********.9107.92-2.44 3.25213.534 141.00.022********.3287.94-2.43 3.27208.353 142.00.022********.9057.96-2.42 3.29203.320 143.00.021********.6347.98-2.41 3.31198.430 144.00.021********.5118.00-2.40 3.33193.678 145.00.020********.5328.01-2.39 3.36189.060 146.00.020********.6928.03-2.38 3.38184.571 147.00.01959858195.9868.05-2.37 3.40180.209 148.00.01914100191.4108.07-2.36 3.42175.967 149.00.01869603186.9608.09-2.35 3.45171.844 150.00.01826328182.6338.10-2.34 3.47167.834

D

-3730535 -3730535

D1

6.383091E-08 6.383091E-08

Rmax

[Ohm]

42460.171 40291.460 38246.057 36316.289 34494.999 32775.511 31151.590 29617.417 28167.555 26796.925 25500.778 24274.673 23114.457 22016.244 20976.395 19991.504 19058.379 18174.031 17335.656 16540.627 15786.479 15070.898 14391.715 13746.891 13134.511 12552.779 12000.003 11474.596 10975.063 10500.000 10054.808 9630.905 9227.166 8842.530 8475.999 8126.630 7793.535 7475.874 7172.856 6883.734 6607.802 6344.394 6092.880 5852.665 5623.186 5403.910 5194.335 4993.985 4802.409 4619.180 4443.894 4276.170 4115.644 3961.974 3814.833 3673.913 3538.923 3409.583 3285.632 3166.818 3052.906 2943.669 2838.895 2738.379 2641.929 2549.362 2460.503 2375.186 2293.255 2214.558 2138.954 2066.307 1996.487 1929.372 1864.844 1802.793 1743.111 1685.697 1630.456 1577.295 1526.126 1476.867 1429.436 1383.758 1339.761 1297.374

1142.662 1107.397 1073.388 1040.585 1008.940 978.407 948.943 920.505 893.052 866.548 840.954 816.235 792.359 769.291 747.003 725.464 704.645 684.520 665.063 646.247 628.051 610.450 593.423 576.949 561.006 545.577 530.642 516.183 502.184 488.627 475.498 462.779 450.459 438.521 426.952 415.741 404.873 394.338 384.124 374.219 364.613 355.296 346.258 337.490 328.982 320.725 312.712 304.933 297.382 290.051 282.932 276.018 269.303 262.780 256.444 250.287 244.304 238.489 232.838 227.345 222.005 216.812 211.763 206.853 202.077 197.432

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