基础知识

NTC 10K B值=3950k R/T表<热敏电阻温度/阻值对照表>

2022-05-08 13:23:56 admin 2
NTC热敏电阻的阻值与温度对照表主要关注几个方面:温度、NTC阻值、阻值公差及B值。
NTC热敏电阻随着温度的升高而降低了电阻,并提供各种基本电阻和曲线。我们通知情况所说的阻值即为NTC的的标称阻值,大多数情况下即25℃时的阻值,它提供了一个方便的参考点。例如,10K的NTC热敏电阻即它在25℃时的阻值为10KΩ,当然有也有些特殊的阻值是以其它温度为标称的,参见RT表说明。
另一个重要特征是“B”值。B值是材料常数,其由制成它的陶瓷材料确定,并描述在两个温度点之间的特定温度范围内的电阻(R/T)曲线的梯度。每个热敏电阻材料将具有不同的材料常数,因此具有不同的电阻与温度曲线。然后,B值将定义第一温度或基点(通常为25℃)的热敏电阻电阻值(称为T1),以及第二温度点(例如50℃,称为T2 )的热敏电阻电阻值。因此,B值将使热敏电阻材料在T1和T2的范围内保持恒定。即B:T1/T2或B:25/85,典型的NTC热敏电阻B值在约3000和约5000之间。
NTC热敏电阻B值计算方式及计算示例

本R/T表(阻值/温度)对照表数据:
1、阻值:本表标称阻值在25℃时为:10KΩ
2、阻值公差:本表的阻值允许公差为:±1%
3、B值:本表的B值在25/50℃时为:3950K

Temp.RmaxRnorRmin
(deg. C)(k Ohms)(k Ohms)(k Ohms)
-50730.3122693.0736657.668
-49678.6575644.5208612.0399
-48631.0184599.71569.8979
-47587.056558.3278530.9523
-46546.4618520.089494.9394
-45508.9557484.7341461.619
-44474.2825452.0267430.7722
-43442.2097421.7511402.1989
-42412.5251393.7107375.7168
-41385.0355367.7258351.1592
-40359.5644343.6326328.3739
-39335.9504321.2809307.2213
-38314.0464300.5339287.5741
-37293.7175281.266269.3154
-36274.8405263.3624252.3384
-35257.3023246.7177236.5449
-34240.9996231.2355221.8447
-33225.8377216.8273208.1555
-32211.7294203.4118195.4013
-31198.5951190.9144183.5124
-30186.3613179.2666172.4247
-29174.9608168.4053162.0793
-28164.3317158.2726152.4218
-27154.417148.8151143.4022
-26145.1643139.9837134.9746
-25136.5254131.7332127.0964
-24128.4558124.0216119.7285
-23120.9146116.8107112.8348
-22113.864110.0648106.3818
-21107.2691103.7512100.3387
-20101.097797.839694.6771
-1995.320192.30289.3705
-1889.908887.112484.3946
-1784.838582.247179.7268
-1680.085677.683775.3463
-1575.628473.401871.2336
-1471.446869.382367.3708
-1367.52265.607763.7412
-1263.83762.061660.3295
-1160.375558.728857.1212
-1057.122855.595354.1032
-954.065152.64851.2629
-851.189549.874748.5889
-748.484247.264346.0705
-645.938144.806243.6978
-543.540942.490641.4615
-441.283140.308639.3531
-339.155938.251637.3644
-237.150836.311735.488
-135.260334.481733.7169
033.477132.754732.0447
131.794531.124330.4652
230.206429.584728.9728
328.706828.130127.5623
427.290426.755626.2286
525.952125.456224.9672
624.687224.227423.7738
723.491223.06522.6443
822.359921.96521.575
921.289720.923920.5622
1020.276819.93819.6028
1119.317819.004118.6937
1218.409618.119317.8318
1317.549317.280717.0146
1416.73416.485716.2394
1515.961215.731715.504
1615.228415.016414.8059
1714.533314.337614.1432
1813.873813.693313.5139
1913.247913.081612.916
2012.653712.500512.3479
2112.089511.948511.808
2211.553511.423911.2946
2311.044210.925210.8064
2410.560210.45110.3419
2510.1109.9
269.67099.57099.471
279.26239.16269.063
288.87328.77388.6747
298.50258.40378.3052
308.14948.05127.9534
317.81287.71547.6184
327.49197.39537.2993
337.18597.09036.9953
346.8946.79956.7056
356.61566.52216.4294
366.34986.25766.166
376.09626.00515.9148
385.8545.76425.6752
395.62275.53425.4465
405.40185.31465.2283
415.19075.10495.0199
424.9894.90454.821
434.79614.7134.6309
444.61174.534.4494
454.43544.35514.2759
464.26674.18784.11
474.10534.02783.9515
483.95083.87483.7999
493.8033.72833.6548
503.66143.58823.5161
513.52583.4543.3833
523.3963.32553.2562
533.27153.20253.1346
543.15233.08463.0181
553.0382.97172.9065
562.92852.86352.7996
572.82342.75972.6972
582.72272.66032.599
592.6262.56492.5049
602.53332.47342.4147
612.44432.38562.3282
622.35892.30142.2452
632.27682.22062.1656
642.19812.14312.0892
652.12242.06862.0159
662.04981.9971.9455
671.981.92831.8779
681.91291.86231.813
691.84841.79891.7507
701.78641.7381.6908
711.72671.67941.6332
721.66941.62311.5779
731.61421.56891.5247
741.56121.51681.4736
751.51011.46671.4245
761.4611.41851.3772
771.41371.37221.3317
781.36811.32751.288
791.32431.28451.2458
801.2821.24311.2053
811.24131.20331.1663
821.20211.16491.1287
831.16441.12791.0926
841.12791.09231.0577
851.09281.0581.0241
861.0591.02490.9918
871.02640.9930.9606
880.99490.96230.9306
890.96460.93260.9016
900.93530.9040.8737
910.9070.87640.8468
920.87970.84980.8208
930.85340.82410.7958
940.8280.79940.7716
950.80350.77540.7483
960.77980.75230.7258
970.75690.730.7041
980.73480.70850.6831
990.71340.68770.6628
1000.69280.66760.6433
1010.67280.64820.6244
1020.65360.62950.6062
1030.63490.61130.5885
1040.61690.59380.5715
1050.59950.57690.555
1060.58260.56050.5391
1070.56630.54470.5237
1080.55060.52930.5089
1090.53530.51450.4945
1100.52060.50020.4806
1110.50630.48630.4671
1120.49240.47290.4541
1130.47910.45990.4415
1140.46610.44740.4293
1150.45350.43520.4175
1160.44140.42340.4061
1170.42960.4120.3951
1180.41820.40090.3844
1190.40710.39020.374
1200.39640.37990.364
1210.3860.36980.3542
1220.3760.36010.3448
1230.36620.35060.3357
1240.35680.34150.3269
1250.34760.33260.3183
1260.33870.3240.31
1270.33010.31570.3019
1280.32170.30760.2941
1290.31360.29980.2866
1300.30570.29220.2792
1310.29810.28480.2721
1320.29060.27760.2652
1330.28340.27070.2585
1340.27650.2640.252
1350.26970.25740.2457
1360.26310.25110.2396
1370.25670.24490.2336
1380.25050.23890.2278
1390.24440.23310.2222
1400.23860.22740.2168
1410.23290.2220.2115
1420.22730.21660.2064
1430.2220.21140.2014
1440.21670.20640.1966
1450.21160.20150.1919
1460.20670.19680.1873
1470.20190.19220.1829
1480.19720.18770.1786
1490.19270.18330.1744
1500.18830.17910.1703
1510.1840.17490.1663
1520.17980.17090.1625
1530.17570.1670.1587
1540.17180.16320.1551
1550.16790.15950.1515
1560.16420.15590.1481
1570.16050.15240.1447
1580.1570.1490.1415
1590.15350.14570.1383
1600.15020.14250.1352
1610.14690.13940.1322
1620.14370.13630.1293
1630.14060.13330.1264
1640.13760.13040.1236
1650.13460.12760.1209
1660.13180.12490.1183
1670.1290.12220.1158
1680.12620.11960.1133
1690.12360.1170.1108
1700.1210.11460.1085
1710.11850.11210.1062
1720.1160.10980.1039
1730.11360.10750.1017
1740.11130.10530.0996
1750.1090.10310.0975
1760.10680.1010.0955
1770.10460.09890.0935
1780.10250.09690.0916
1790.10040.09490.0897
1800.09840.0930.0879
1810.09650.09110.0861
1820.09450.08930.0843
1830.09270.08750.0826
1840.09090.08580.081
1850.08910.08410.0794
1860.08730.08240.0778
1870.08560.08080.0762
1880.0840.07920.0747
1890.08240.07770.0733
1900.08080.07620.0718
1910.07930.07470.0704
1920.07780.07330.0691
1930.07630.07190.0678
1940.07490.07050.0665
1950.07350.06920.0652
1960.07210.06790.0639
1970.07070.06660.0627
1980.06940.06540.0616
1990.06820.06420.0604
2000.06690.0630.0593
2010.06570.06180.0582
2020.06450.06070.0571
2030.06330.05960.056
2040.06220.05850.055
2050.06110.05740.054
2060.060.05640.053
2070.05890.05540.0521
2080.05790.05440.0511
2090.05690.05340.0502
2100.05590.05250.0493
2110.05490.05160.0484
2120.0540.05070.0476
2130.0530.04980.0467
2140.05210.04890.0459
2150.05120.04810.0451
2160.05030.04730.0443
2170.04950.04640.0436
2180.04870.04560.0428
2190.04780.04490.0421
2200.0470.04410.0414
2210.04630.04340.0407
2220.04550.04260.04
2230.04470.04190.0393
2240.0440.04120.0386
2250.04330.04060.038
2260.04260.03990.0374
2270.04190.03920.0368
2280.04120.03860.0361
2290.04060.0380.0356
2300.03990.03740.035
2310.03930.03680.0344
2320.03860.03620.0339
2330.0380.03560.0333
2340.03740.0350.0328
2350.03690.03450.0323
2360.03630.03390.0317
2370.03570.03340.0312
2380.03520.03290.0307
2390.03460.03240.0303
2400.03410.03190.0298
2410.03360.03140.0293
2420.03310.03090.0289
2430.03260.03040.0284
2440.03210.030.028
2450.03160.02950.0276
2460.03110.02910.0272
2470.03070.02860.0268
2480.03020.02820.0263
2490.02980.02780.026
2500.02940.02740.0256
2510.02890.0270.0252
2520.02850.02660.0248
2530.02810.02620.0245
2540.02770.02580.0241
2550.02730.02550.0237
2560.02690.02510.0234
2570.02650.02470.0231
2580.02620.02440.0227
2590.02580.0240.0224
2600.02540.02370.0221
2610.02510.02340.0218
2620.02470.02310.0215
2630.02440.02270.0212
2640.02410.02240.0209
2650.02370.02210.0206
2660.02340.02180.0203
2670.02310.02150.02
2680.02280.02120.0198
2690.02250.02090.0195
2700.02220.02070.0192
2710.02190.02040.019
2720.02160.02010.0187
2730.02130.01980.0185
2740.02110.01960.0182
2750.02080.01930.018
2760.02050.01910.0177
2770.02020.01880.0175
2780.020.01860.0173
2790.01970.01830.0171
2800.01950.01810.0168
2810.01920.01790.0166
2820.0190.01770.0164
2830.01880.01740.0162
2840.01850.01720.016
2850.01830.0170.0158
2860.01810.01680.0156
2870.01790.01660.0154
2880.01760.01640.0152
2890.01740.01620.015
2900.01720.0160.0148
2910.0170.01580.0147
2920.01680.01560.0145
2930.01660.01540.0143
2940.01640.01520.0141
2950.01620.0150.014
2960.0160.01490.0138
2970.01580.01470.0136
2980.01570.01450.0135
2990.01550.01440.0133
3000.01530.01420.0132
3010.01510.0140.013
3020.0150.01390.0129
3030.01480.01370.0127
3040.01460.01360.0126
3050.01450.01340.0124
3060.01430.01330.0123
3070.01410.01310.0121
3080.0140.0130.012
3090.01380.01280.0119
3100.01370.01270.0117
3110.01350.01250.0116
3120.01340.01240.0115
3130.01320.01230.0114
3140.01310.01210.0112
3150.0130.0120.0111
3160.01280.01190.011
3170.01270.01170.0109
3180.01260.01160.0108
3190.01240.01150.0106
3200.01230.01140.0105
3210.01220.01130.0104
3220.01210.01110.0103
3230.01190.0110.0102
3240.01180.01090.0101
3250.01170.01080.01
3260.01160.01070.0099
3270.01150.01060.0098
3280.01130.01050.0097
3290.01120.01040.0096
3300.01110.01030.0095
3310.0110.01020.0094
3320.01090.01010.0093
3330.01080.010.0092
3340.01070.00990.0091
3350.01060.00980.009
3360.01050.00970.009
3370.01040.00960.0089
3380.01030.00950.0088
3390.01020.00940.0087
3400.01010.00930.0086
3410.010.00930.0085
3420.00990.00920.0085
3430.00980.00910.0084
3440.00980.0090.0083
3450.00970.00890.0082
3460.00960.00880.0082
3470.00950.00880.0081
3480.00940.00870.008
3490.00930.00860.0079
3500.00920.00850.0079

负温度系数热敏电阻,简称为NTC热敏电阻,它的阻值随着工作温度的增加而降低。目前,因为NTC热敏电阻的几乎可以应用于对温度起作用的任何类型的设置中及它的高性价比,所以NTC热敏电阻已经成为最常用的温度传感器类型。
在采用NTC热敏电阻之前,得先搞明白NTC热敏电阻特有的阻值与温度(R/T)之间的关系。NTC热敏电阻的相对较大的负系数响应意味着即使很小的温度变化也会导致其电阻发生明显的变化,这也是NTC成为精确温度测试和控制的重要原因。

NTC热敏电阻特性曲线
图片关键词
此图就是典型的负温度系数(NTC)曲线,其电阻随温度升高而降低。


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