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NTC
Thermistors
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R-T Characteristics of
Common Specs
Unit: KΩ |
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Calculating the resistance of a thermistor
B or beta value is the thermal exponent of the NTC thermistor,
which is defined as the ratio of the difference between
the napierian logarithms of the zero power resistance
at two temperatures to the difference between the reciprocals
of the two temperatures.
You can calculate the RT2 using this formula:
Here: B=3380 T1=25 RT1=10Kohm |
|
|
3KΩ |
5KΩ
|
5KΩ
|
5KΩ
|
10KΩ
|
10KΩ
|
10KΩ
|
| -30°C
|
31.70
|
52.84
|
63.73
|
90.83
|
111.3
|
127.5
|
133.6250
|
| -25°C
|
24.75
|
41.19
|
48.60
|
66.65
|
86.39
|
97.10
|
101.6000
|
| -20°C
|
19.46
|
32.44
|
37.40
|
49.44
|
67.74
|
74.80
|
77.9250
|
| -15°C
|
15.41
|
25.65
|
29.03
|
37.05
|
53.39
|
58.08
|
60.2925
|
| -10°C
|
12.29
|
20.48
|
22.72
|
28.03
|
42.45
|
45.44
|
47.0150
|
| -5°C
|
9.864
|
16.43
|
17.91
|
21.40
|
33.89
|
35.82
|
36.9450
|
| 0°C
|
7.974
|
13.29
|
14.23
|
16.48
|
27.28
|
28.46
|
29.2350
|
| 5°C
|
6.486
|
10.80
|
11.39
|
12.79
|
22.05
|
22.78
|
23.3050
|
| 10°C
|
5.303
|
8.839
|
9.181
|
9.998
|
17.96
|
18.36
|
18.6850
|
| 15°C
|
4.362
|
7.266
|
7.451
|
7.879
|
14.68
|
14.90
|
15.0875
|
| 20°C
|
3.608
|
6.013
|
6.085
|
6.255
|
12.09
|
12.17
|
12.2450
|
| 25°C
|
3.000
|
5.000
|
5.000
|
5.000
|
10.00
|
10.00
|
10.0000
|
| 30°C
|
2.507
|
4.179
|
4.132
|
4.024
|
8.313
|
8.264
|
7.9340
|
| 35°C
|
2.106
|
3.508
|
3.434
|
3.259
|
6.941
|
6.890
|
6.7738
|
| 40°C
|
1.777
|
2.962
|
2.869
|
2.656
|
5.828
|
5.738
|
5.6230
|
| 45°C
|
1.507
|
2.510
|
2.407
|
2.177
|
4.912
|
4.810
|
4.6913
|
| 50°C
|
1.283
|
2.138
|
2.032
|
1.794
|
4.161
|
4.064
|
3.9265
|
| 55°C
|
1.096
|
1.826
|
1.723
|
1.487
|
3.537
|
3.448
|
3.3043
|
| 60°C
|
0.9408
|
1.568
|
1.467
|
1.238
|
3.021
|
2.934
|
2.7928
|
| 65°C
|
0.8106
|
1.351
|
1.253
|
1.036
|
2.589
|
2.504
|
2.3726
|
| 70°C
|
0.7014
|
1.169
|
1.073
|
0.8717
|
2.229
|
2.146
|
2.0210
|
| 75°C
|
0.6090
|
1.014
|
0.9225
|
0.7364
|
1.924
|
1.845
|
1.7288
|
| 80°C
|
0.5303
|
0.8838
|
0.7959
|
0.6248
|
1.669
|
1.592
|
1.4858
|
| 85°C
|
0.4634
|
0.7725
|
0.6887
|
0.5324
|
1.451
|
1.378
|
1.2818
|
| 90°C
|
0.4064
|
0.6774
|
0.5975
|
0.4555
|
1.226
|
1.195
|
1.1088
|
| 95°C
|
0.3578
|
0.5963
|
0.5196
|
0.3912
|
1.108
|
1.039
|
0.9640
|
| 100°C
|
0.3160
|
0.5267
|
0.4533
|
0.3372
|
0.9735
|
0.966
|
0.8377
|
| 105°C
|
0.2798
|
0.4656
|
0.3974
|
0.2918
|
0.8574
|
0.7949
|
0.7344
|
| 110°C
|
0.2478
|
0.4130
|
0.3514
|
0.2533
|
0.7579
|
0.7028
|
0.6429
|
 |
B25/50°C |
3270 |
3270 |
3470 |
3950 |
3380 |
3470 |
3600 |
B25/85°C |
3320 |
3320 |
3530 |
3990 |
3435 |
3530 |
3630 |
| 
|
10K
Ω |
50K
Ω |
100K
Ω |
50KΩ
|
50K
Ω |
100K
Ω |
100K
Ω |
150K
Ω |
| -30°C
|
181.7 |
908.3 |
1790 |
967.33
|
991.35
|
1984.3
|
2056.7
|
3942.8
|
| -25°C
|
133.5
|
667.6 |
1321 |
705.35
|
723.36
|
1447.7
|
1502.2
|
2787.1
|
| -20°C
|
98.99 |
494.4 |
984.7 |
519.86
|
533.09
|
1066.9
|
1107.0
|
1992.8
|
| -15°C
|
74.06 |
370.3 |
740.8 |
387.07
|
396.64
|
793.70
|
822.68
|
1440.3
|
| -10°C
|
56.06 |
280.3 |
562.3 |
290.98
|
297.80
|
595.85
|
616.42
|
1051.9
|
| -5°C
|
42.81 |
214.1 |
430.5 |
220.79
|
225.57
|
451.25
|
465.45
|
775.83
|
| 0°C
|
32.96 |
164.8 |
332.3 |
173.34 |
172.0 |
344.1 |
352.4 |
576.7 |
| 5°C
|
25.57 |
127.9 |
257.5 |
132.79
|
132.2 |
264.3 |
270.0 |
433.2 |
| 10°C
|
20.00 |
99.98 |
201.1 |
102.68 |
102.4 |
204.8 |
208.3 |
328.4
|
| 15°C
|
15.76 |
78.79 |
158.2 |
80.11 |
80.03 |
160.1
|
161.9 |
250.9 |
| 20°C
|
12.51 |
62.55 |
125.4 |
63.04 |
63.00 |
126.0
|
126.7 |
193.3 |
| 25°C
|
10.00 |
50.00 |
100.0 |
50.00 |
50.00 |
100.0 |
100.0 |
150.0 |
| 30°C
|
8.048 |
40.24 |
80.29 |
39.96 |
39.76 |
79.51 |
78.35 |
117.3 |
| 35°C
|
6.517 |
32.58 |
64.87
|
32.18 |
31.89 |
63.77 |
62.37 |
92.28
|
| 40°C
|
5.321 |
26.56 |
57.72 |
26.09 |
25.73 |
51.45 |
49.94 |
73.11
|
| 45°C
|
4.356 |
21.78 |
43.10 |
21.29 |
20.88 |
41.76 |
40.22 |
58.28 |
| 50°C
|
3.588 |
17.94 |
35.42 |
17.48 |
17.04 |
34.08 |
32.56 |
46.74 |
| 55°C
|
2.972 |
14.86 |
29.26 |
14.44 |
13.999 |
27.97
|
26.40 |
37.71 |
| 60°C
|
2.467 |
12.38 |
24.30 |
12.00 |
11.53 |
23.06 |
21.53 |
30.58 |
| 65°C
|
2.073 |
10.36 |
20.27 |
10.03 |
9.541 |
19.8 |
17.69 |
24.94 |
| 70°C
|
1.734 |
8.717 |
16.99 |
8.42 |
7.929 |
15.86 |
14.62 |
20.45 |
| 75°C
|
1.473 |
7.364 |
14.31 |
7.11 |
6.621 |
13.24 |
12.10 |
16.85 |
| 80°C
|
1.250 |
6.248 |
12.10 |
6.03 |
5.552 |
11.10 |
10.05 |
13.94 |
| 85°C
|
1.065 |
5.324 |
10.27 |
5.05 |
4.674 |
9.348 |
8.376 |
11.60
|
| 90°C
|
0.911 |
4.555
|
8.758 |
4.40 |
3.950 |
7.900 |
7.004 |
9.680 |
| 95°C
|
0.7824 |
3.912 |
7.459 |
3.78 |
3.349 |
6.698 |
5.894 |
8.118 |
| 100°C
|
0.6744 |
3.372 |
6.438 |
3.26 |
2.849 |
5.698 |
4.978 |
6.836 |
| 105°C
|
0.5834 |
2.917
|
5.550 |
2.82 |
2.438 |
4.875 |
4.215 |
5.780 |
| 110°C
|
0.5066 |
2.533 |
4.801 |
2.46 |
2.093 |
4.186 |
3.580 |
4.904 |
|
B25/50°C |
3950 |
3950 |
4000 |
4050 |
4150 |
4150 |
4300 |
4500 |
B25/80°C |
3990 |
3990 |
4050 |
4080 |
4220 |
4220 |
4410 |
4560 |
|
8415
Mountain
Sights Avenue, Montreal (Quebec), H4P 2B8 Canada
