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RESISTANCE
- TEMPERATURE TABLES
|
NTC (Negative Temperature Coefficient) is the negative percent resistance change per degree C. To determine the resistance tolerance of a precision thermistor at any temperature point, multiply the temperature tolerance time the NTC. As an example, a Curve A thermistor with a temperature tolerance of +1¢J over the temperature range 0¢J to 70¢J would have the following resistance tolerance: 0¢J=+5.1%; 25¢J=+4.4%; 70¢J=+3.4% RT/R25 Ratio is the resistance at temperature divided ¡@ |
|
by the resistance at 25¢J. To determine the resistance at other temperature points, multiply the coefficient by the R25 value. Ratio TOL (Tolerance) is the resistance tolerance at a temperature point due to slope variance from the nominal R-T Curve. This tolerance applies to thermistors point-matched to a single temperature point. The ratio tolerance is added to the percent resistance tolerance at the point-matched temperature. |
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|
CURVE
A |
CURVE
B |
CURVE
C |
CURVE
D |
||||||||
|
B
25/85 |
3975K |
3942K |
3695K |
4262K |
||||||||
|
Temp¢J |
Typical R25=1K to
100K RT/R25
RATIO
RATIO TOL
NTC |
Typical R25=10K to
100K RT/R25
RATIO RATIO TOL NTC |
Typical R25=5K to 20K RT/R25
RATIO RATIO TOL NTC |
Typical R25=25K to
100K RT/R25
RATIO
RATIO
TOL NTC |
||||||||
|
-50 |
67.13 |
3.5 |
7.1 |
56.39 |
3.5 |
6.7 |
44.13 |
3.5 |
6.3 |
82.36 |
3.5 |
7.4 |
|
-45 |
47.26 |
|
6.9 |
40.56 |
|
6.5 |
32.36 |
|
6.1 |
57.30 |
|
7.1 |
|
-40 |
33.69 |
3.0 |
6.7 |
29.48 |
3.0 |
6.3 |
23.97 |
3.0 |
5.9 |
40.34 |
3.0 |
6.9 |
|
-35 |
24.29 |
|
6.4 |
21.64 |
|
6.1 |
17.92 |
|
5.3 |
28.72 |
|
6.7 |
|
-30 |
17.71 |
2.4 |
6.2 |
16.03 |
2.4 |
5.9 |
13.52 |
2.4 |
5.6 |
20.67 |
2.4 |
6.5 |
|
-25 |
13.05 |
|
6.0 |
11.99 |
|
5.7 |
10.29 |
|
5.4 |
15.02 |
|
6.3 |
|
-20 |
9.711 |
1.9 |
5.8 |
9.040 |
1.9 |
5.6 |
7.891 |
1.9 |
5.2 |
11.03 |
1.9 |
6.1 |
|
-15 |
7.297 |
|
5.6 |
6.875 |
|
5.4 |
6.102 |
|
5.1 |
8.174 |
|
5.9 |
|
-10 |
5.534 |
1.4 |
5.4 |
5.270 |
1.4 |
5.2 |
4.754 |
1.4 |
4.9 |
6.113 |
1.4 |
5.7 |
|
-5 |
4.234 |
|
5.3 |
4.071 |
|
5.1 |
3.731 |
|
4.8 |
4.611 |
|
5.6 |
|
0 |
3.266 |
1.0 |
5.1 |
3.168 |
1.0 |
4.9 |
2.949 |
1.0 |
4.6 |
3.507 |
1.0 |
5.4 |
|
5 |
2.540 |
|
5.0 |
2.483 |
|
4.8 |
2.346 |
|
4.5 |
2.689 |
|
5.2 |
|
10 |
1.991 |
0.5 |
4.8 |
1.959 |
0.5 |
4.7 |
1.879 |
0.5 |
4.4 |
2.077 |
0.5 |
5.1 |
|
15 |
1.572 |
|
4.7 |
1.556 |
|
4.5 |
1.514 |
|
4.3 |
1.617 |
|
4.9 |
|
20 |
1.249 |
0.1 |
4.5 |
1.244 |
0.1 |
4.4 |
1.227 |
0.1 |
4.1 |
1.267 |
0.1 |
4.8 |
|
25 |
1.000 |
0.0 |
4.4 |
1.000 |
0.0 |
4.3 |
1.000 |
0.0 |
4.0 |
1.000 |
0.0 |
4.7 |
|
30 |
0.8056 |
0.2 |
4.3 |
0.8088 |
0.2 |
4.2 |
0.8196 |
0.2 |
3.9 |
0.7943 |
0.2 |
4.5 |
|
35 |
0.6530 |
|
4.1 |
0.6579 |
|
4.1 |
0.6754 |
|
3.8 |
0.6349 |
|
4.4 |
|
37 |
0.6014 |
|
4.1 |
0.6066 |
|
4.0 |
0.6260 |
|
3.8 |
0.5815 |
|
4.4 |
|
40 |
0.5325 |
0.6 |
4.0 |
0.5380 |
0.6 |
4.0 |
0.5594 |
0.6 |
3.7 |
0.5106 |
0.6 |
4.3 |
|
45 |
0.4367 |
|
3.9 |
0.4423 |
|
3.9 |
0.4655 |
|
3.6 |
0.4130 |
|
4.2 |
|
50 |
0.3601 |
1.0 |
3.8 |
0.3654 |
1.0 |
3.8 |
0.3893 |
1.0 |
3.5 |
0.3359 |
1.0 |
4.1 |
|
55 |
0.2985 |
|
3.7 |
0.3034 |
|
3.7 |
0.3270 |
|
3.4 |
0.2747 |
|
4.0 |
|
60 |
0.2487 |
1.2 |
3.6 |
0.2531 |
1.2 |
3.6 |
0.2760 |
1.2 |
3.4 |
0.2259 |
1.2 |
3.9 |
|
65 |
0.2082 |
|
3.5 |
0.2121 |
|
3.5 |
0.2338 |
|
3.3 |
0.1866 |
|
3.8 |
|
70 |
0.1752 |
1.6 |
3.4 |
0.1785 |
1.6 |
3.4 |
0.1990 |
1.6 |
3.2 |
0.1549 |
1.6 |
3.7 |
|
75 |
0.1480 |
|
3.3 |
0.1508 |
|
3.3 |
0.1700 |
|
3.1 |
0.1293 |
|
3.6 |
|
80 |
0.1256 |
1.9 |
3.2 |
0.1280 |
1.9 |
3.2 |
0.1457 |
1.9 |
3.0 |
0.1083 |
1.9 |
3.5 |
|
85 |
0.1071 |
|
3.2 |
0.1091 |
|
3.2 |
0.1254 |
|
3.0 |
0.09115 |
|
3.4 |
|
90 |
0.09161 |
2.1 |
3.1 |
0.09327 |
2.1 |
3.1 |
0.1084 |
2.1 |
2.9 |
0.07704 |
2.1 |
3.3 |
|
95 |
0.07870 |
|
3.0 |
0.08006 |
|
3.0 |
0.09392 |
2.4 |
2.8 |
0.06538 |
|
3.2 |
|
100 |
0.06786 |
2.4 |
2.9 |
0.06897 |
2.4 |
2.9 |
0.08168 |
2.4 |
2.8 |
0.05570 |
2.4 |
3.2 |
|
105 |
0.05873 |
|
2.9 |
0.05962 |
|
2.9 |
0.07127 |
|
2.7 |
0.04764 |
|
3.1 |
|
110 |
0.05100 |
2.6 |
2.8 |
0.05171 |
2.6 |
2.8 |
0.06237 |
2.6 |
2.6 |
0.04089 |
2.6 |
3.0 |
|
115 |
0.04444 |
|
2.7 |
0.04500 |
|
2.8 |
0.05476 |
|
2.6 |
0.03522 |
|
2.9 |
|
120 |
0.03885 |
2.9 |
2.7 |
0.03928 |
2.9 |
2.7 |
0.04821 |
2.9 |
2.5 |
0.03045 |
2.9 |
2.9 |
|
125 |
0.03408 |
3.0 |
2.6 |
0.03439 |
3.0 |
2.6 |
0.04257 |
|
2.5 |
0.02641 |
|
2.8 |
|
130 |
0.02997 |
3.1 |
2.5 |
0.03020 |
3.1 |
2.6 |
0.03769 |
3.1 |
2.4 |
0.02298 |
3.1 |
2.8 |
|
135 |
0.02645 |
|
2.5 |
0.02660 |
|
2.5 |
0.03346 |
|
2.4 |
0.02006 |
|
2.7 |
|
140 |
0.02340 |
3.4 |
2.4 |
0.02349 |
3.4 |
2.5 |
0.02979 |
3.4 |
2.3 |
0.01756 |
3.4 |
2.6 |
|
145 |
0.02076 |
|
2.4 |
0.02080 |
|
2.4 |
0.02658 |
|
2.3 |
0.01542 |
|
2.6 |
|
150 |
0.01847 |
3.5 |
2.3 |
0.01846 |
3.5 |
2.4 |
0.02377 |
3.5 |
2.2 |
0.01358 |
3.5 |
2.5 |
|
|
CURVE
E |
CURVE
F |
CURVE
G |
CURVE
H |
||||||||
|
B
25/85 |
4434K |
3435K |
4390K |
4847K |
||||||||
|
Temp¢J |
Typical R25=1K to
100K RT/R25
RATIO RATIO TOL NTC |
Typical R25=10K RT/R25
RATIO RATIO TOL NTC |
Typical R25=10K RT/R25
RATIO RATIO TOL NTC |
Typical R25=1MENG RT/R25
RATIO RATIO TOL NTC |
||||||||
|
-50 |
89.69 |
5.0 |
7.4 |
32.95 |
|
6.2 |
95.84 |
|
8.1 |
|
|
|
|
-45 |
62.25 |
|
7.2 |
24.77 |
|
6.0 |
65.66 |
|
7.8 |
|
|
|
|
-40 |
43.69 |
4.2 |
7.0 |
18.85 |
|
5.8 |
45.72 |
|
7.5 |
|
|
|
|
-35 |
30.98 |
|
6.8 |
14.41 |
|
5.6 |
32.06 |
|
7.2 |
|
|
|
|
-30 |
22.20 |
2.9 |
6.6 |
11.13 |
|
5.4 |
22.82 |
|
7.0 |
|
|
|
|
-25 |
16.06 |
|
6.4 |
8.643 |
|
5.2 |
16.37 |
|
6.7 |
|
|
|
|
-20 |
11.73 |
2.7 |
6.2 |
6.777 |
|
5.0 |
11.91 |
|
6.5 |
14.65 |
13.7 |
6.1 |
|
-15 |
8.644 |
|
6.0 |
5.341 |
|
4.8 |
8.727 |
|
6.3 |
10.51 |
|
6.6 |
|
-10 |
6.425 |
2.1 |
5.8 |
4.247 |
|
4.7 |
6.472 |
|
6.0 |
7.607 |
|
6.4 |
|
-5 |
4.816 |
|
5.7 |
3.39 |
|
4.5 |
4.834 |
|
5.8 |
5.556 |
11.7 |
6.2 |
|
0 |
3.638 |
1.4 |
5.5 |
2.728 |
|
4.4 |
3.65 |
|
5.7 |
4.093 |
|
6.0 |
|
5 |
2.770 |
|
5.4 |
2.205 |
|
4.2 |
2.772 |
|
5.5 |
3.041 |
9.9 |
5.9 |
|
10 |
2.125 |
0.9 |
5.2 |
1.796 |
|
4.1 |
2.125 |
|
5.3 |
2.277 |
|
5.7 |
|
15 |
1.642 |
|
5.1 |
1.469 |
|
4.0 |
1.64 |
|
5.1 |
1.718 |
8.2 |
5.6 |
|
20 |
1.277 |
0.2 |
5.0 |
1.209 |
|
3.9 |
1.277 |
|
5.0 |
1.306 |
|
5.4 |
|
25 |
1.000 |
0.0 |
4.8 |
1.00 |
|
3.7 |
1.00 |
|
4.8 |
1.00 |
6.6 |
5.3 |
|
30 |
0.7881 |
0.4 |
4.7 |
0.8313 |
|
3.6 |
0.7888 |
|
4.7 |
0.7710 |
|
5.1 |
|
35 |
0.6250 |
|
4.6 |
0.694 |
|
3.5 |
0.6259 |
|
4.5 |
0.5984 |
5.2 |
5.0 |
|
37 |
0.5706 |
|
4.5 |
|
|
|
|
|
|
0.5417 |
|
5.0 |
|
40 |
0.4986 |
0.9 |
4.5 |
0.5827 |
|
3.4 |
0.5003 |
|
4.4 |
0.4675 |
|
4.9 |
|
45 |
0.4001 |
|
4.3 |
0.4912 |
|
3.3 |
0.402 |
|
4.3 |
0.3675 |
3.7 |
4.8 |
|
50 |
0.3228 |
1.5 |
4.2 |
0.4161 |
|
3.2 |
0.3251 |
|
4.1 |
0.2907 |
|
4.6 |
|
55 |
0.2619 |
|
4.1 |
0.3536 |
|
3.1 |
0.2642 |
|
4.0 |
0.2312 |
2.4 |
4.5 |
|
60 |
0.2136 |
1.9 |
4.0 |
0.302 |
|
3.1 |
0.2161 |
|
3.9 |
0.1850 |
|
4.4 |
|
65 |
0.1750 |
|
3.9 |
0.2588 |
|
3.0 |
0.1775 |
|
3.8 |
0.1488 |
1.1 |
4.3 |
|
70 |
0.1441 |
2.4 |
3.8 |
0.2228 |
|
2.9 |
0.1466 |
|
3.7 |
0.1204 |
|
4.2 |
|
75 |
0.1193 |
|
3.7 |
0.1924 |
|
2.8 |
0.1215 |
|
3.6 |
0.09784 |
0.0 |
4.1 |
|
80 |
0.09915 |
2.7 |
3.7 |
0.1668 |
|
2.7 |
0.1013 |
|
3.5 |
0.07993 |
|
4.0 |
|
85 |
0.08278 |
|
3.6 |
0.1451 |
|
2.7 |
0.08483 |
|
3.4 |
0.06561 |
1.0 |
3.9 |
|
90 |
0.06941 |
3.2 |
3.5 |
0.1266 |
|
2.6 |
0.07135 |
|
3.3 |
0.05411 |
|
3.8 |
|
95 |
0.05844 |
|
3.4 |
0.1108 |
|
3.0 |
0.06025 |
|
3.3 |
0.04483 |
2.1 |
3.7 |
|
100 |
0.04940 |
3.6 |
3.3 |
0.09731 |
|
2.5 |
0.05111 |
|
3.2 |
0.03730 |
|
3.6 |
|
105 |
0.04192 |
|
3.2 |
0.08572 |
|
2.4 |
0.04351 |
|
3.1 |
0.03117 |
3.1 |
3.6 |
|
110 |
0.03571 |
4.0 |
3.2 |
0.07576 |
|
2.4 |
0.0372 |
|
3.0 |
0.02615 |
|
3.5 |
|
115 |
0.03053 |
|
3.1 |
|
|
|
0.0319 |
|
2.9 |
0.02203 |
4.0 |
3.4 |
|
120 |
0.02619 |
4.4 |
3.0 |
|
|
|
0.02746 |
|
2.9 |
0.01863 |
|
3.3 |
|
125 |
0.02254 |
4.5 |
3.0 |
|
|
|
0.02371 |
|
2.8 |
0.01581 |
4.9 |
3.2 |
|
130 |
0.01947 |
4.7 |
2.9 |
|
|
|
|
|
|
0.01347 |
5.3 |
3.2 |
|
135 |
0.01687 |
|
2.8 |
|
|
|
|
|
|
0.01152 |
5.8 |
3.1 |
|
140 |
0.01467 |
5.0 |
2.8 |
|
|
|
|
|
|
0.00988 |
6.6 |
3.0 |
|
145 |
0.01279 |
|
2.7 |
|
|
|
|
|
|
0.00850 |
|
3.0 |
|
150 |
0.01118 |
5.4 |
2.7 |
|
|
|
|
|
|
0.00734 |
7.3 |
2.9 |
|
|
CURVE
J |
CURVE
K |
CURVE
P |
||||||
|
B
25/85 |
5757K |
3485K |
4144K |
||||||
|
Temp¢J |
Typical R25=10 to
40MEG RT/R25
RATIO RATIO TOL NTC |
Typical R25=200 to 2K RT/R25
RATIO
|
Typical R25=100K RT/R25
RATIO
|
||||||
|
-50 |
|
|
|
39.18 |
8.9 |
6.2 |
|
|
|
|
-45 |
|
|
|
28.88 |
|
6.0 |
|
|
|
|
-40 |
|
|
|
21.50 |
6.8 |
5.8 |
33.58 |
|
6.5 |
|
-35 |
|
|
|
16.18 |
|
5.6 |
24.41 |
|
6.3 |
|
-30 |
|
|
|
12.28 |
5.6 |
5.4 |
17.91 |
|
6.3 |
|
-25 |
|
|
|
9.415 |
|
5.2 |
13.26 |
|
5.9 |
|
-20 |
23.38 |
|
7.9 |
7.278 |
4.4 |
5.1 |
9.898 |
|
5.8 |
|
-15 |
15.87 |
|
7.7 |
5.673 |
|
4.9 |
7.452 |
|
5.6 |
|
-10 |
10.88 |
|
7.8 |
4.457 |
3.3 |
4.7 |
5.655 |
|
5.4 |
|
-5 |
7.530 |
|
7.5 |
3.528 |
|
4.6 |
4.325 |
|
5.3 |
|
0 |
5.262 |
|
7.1 |
2.813 |
2.3 |
4.5 |
3.331 |
|
5.1 |
|
5 |
3.711 |
13.2 |
6.9 |
2.259 |
|
4.3 |
2.585 |
|
5.0 |
|
10 |
2.640 |
|
6.7 |
1.826 |
1.2 |
4.2 |
2.019 |
|
4.9 |
|
15 |
1.895 |
10.9 |
6.6 |
1.485 |
|
4.1 |
1.587 |
|
4.7 |
|
20 |
1.371 |
|
6.4 |
1.215 |
0.3 |
4.0 |
1.256 |
|
4.6 |
|
25 |
1.00 |
8.7 |
6.2 |
1.00 |
0.0 |
3.8 |
1.00 |
|
4.5 |
|
30 |
0.7352 |
|
6.1 |
0.8277 |
0.6 |
3.7 |
0.8008 |
|
4.4 |
|
35 |
0.5446 |
6.8 |
5.9 |
0.6887 |
|
3.6 |
0.6450 |
|
4.3 |
|
37 |
0.4840 |
|
5.9 |
0.6408 |
|
3.6 |
0.5924 |
|
4.2 |
|
40 |
0.4064 |
|
5.8 |
0.5760 |
1.4 |
3.5 |
0.5224 |
|
4.2 |
|
45 |
0.3054 |
4.9 |
5.6 |
0.4842 |
|
3.4 |
0.4253 |
|
4.1 |
|
50 |
0.2311 |
|
5.5 |
0.4089 |
2.2 |
3.3 |
0.3480 |
|
4.0 |
|
55 |
0.1761 |
3.2 |
5.4 |
0.3469 |
|
3.2 |
0.2862 |
|
3.9 |
|
60 |
0.1351 |
|
5.2 |
0.2956 |
3.0 |
3.2 |
0.2365 |
|
3.8 |
|
65 |
0.1042 |
1.5 |
5.1 |
0.2530 |
|
3.1 |
0.1964 |
|
3.4 |
|
70 |
0.08094 |
|
5.0 |
0.2174 |
3.6 |
3.0 |
0.1638 |
|
3.6 |
|
75 |
0.06323 |
0.0 |
4.9 |
0.1875 |
|
2.9 |
0.1372 |
|
3.5 |
|
80 |
0.04968 |
|
4.8 |
0.1623 |
4.3 |
2.8 |
0.1154 |
|
3.4 |
|
85 |
0.03926 |
1.4 |
4.7 |
0.1411 |
|
2.8 |
0.09742 |
|
3.3 |
|
90 |
0.03119 |
|
4.5 |
0.1230 |
4.9 |
2.7 |
0.08260 |
|
3.3 |
|
95 |
0.02491 |
2.8 |
4.4 |
0.1076 |
|
2.6 |
0.07030 |
|
3.2 |
|
100 |
0.2000 |
|
4.3 |
0.09450 |
5.5 |
2.6 |
0.06005 |
|
3.1 |
|
105 |
0.01614 |
4.1 |
4.2 |
0.08322 |
|
2.5 |
0.05148 |
|
3.0 |
|
110 |
0.01309 |
|
4.1 |
0.07351 |
6.1 |
2.5 |
0.04429 |
|
3.0 |
|
115 |
0.01066 |
5.2 |
4.1 |
0.06512 |
|
2.4 |
0.03823 |
|
2.9 |
|
120 |
0.00872 |
|
4.0 |
0.05786 |
6.7 |
2.3 |
0.03310 |
|
2.8 |
|
125 |
0.00717 |
6.4 |
3.9 |
0.05154 |
7.4 |
2.3 |
0.02876 |
|
2.8 |
|
130 |
0.00592 |
7.0 |
3.8 |
|
|
|
0.02506 |
|
2.7 |
|
135 |
0.00491 |
7.6 |
3.7 |
|
|
|
0.02190 |
|
2.7 |
|
140 |
0.00409 |
8.6 |
3.6 |
|
|
|
0.01920 |
|
2.6 |
|
145 |
0.00342 |
|
3.5 |
|
|
|
0.0168 |
|
2.6 |
|
150 |
0.00287 |
9.6 |
3.5 |
|
|
|
0.01487 |
|
2.5 |
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