B57981 EPCOS AG, B57981 Datasheet - Page 4

• Manufacturer Part Number: B57981
• Description: Ntc Thermistors For Temperature Measurement
• Manufacturer: EPCOS AG

R/T characteristics
R/T No.
T ( C)
Please read Cautions and warnings and
Important notes at the end of this document.
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
100.0
105.0
110.0
115.0
120.0
125.0
130.0
135.0
140.0
145.0
150.0
155.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
5.0
0.0
5.0
1008
B
R
53.104
39.318
29.325
22.03
16.666
12.696
9.7251
7.5171
5.8353
4.5686
3.605
2.8665
2.2907
1.8438
1.492
1.2154
1.0000
0.82976
0.68635
0.57103
0.48015
0.40545
0.3417
0.28952
0.24714
0.21183
0.18194
0.1568
0.13592
0.11822
0.1034
0.090741
0.079642
0.070102
0.061889
0.054785
0.048706
0.043415
0.038722
0.034615
0.031048
0.02791
0.025193
25/100
T
/R
25
= 3560 K
6.1
6.0
5.8
5.7
5.5
5.4
5.2
5.1
4.9
4.8
4.7
4.5
4.4
4.3
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.1
3.0
2.9
2.8
2.8
2.7
2.6
2.6
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.1
2.1
2.0
(%/K) R
2003
B
97.578
67.65
47.538
33.831
24.359
17.753
13.067
9.7228
7.3006
5.5361
4.2332
3.266
2.5392
1.9902
1.5709
1.2492
1.0000
0.80575
0.65326
0.5329
0.43715
0.36064
0.29908
0.24932
0.20886
0.17578
0.14863
0.12621
0.10763
0.092159
0.079225
0.068356
0.059247
0.051531
0.044921
0.039282
0.034387
0.030186
0.02665
0.023594
0.020931
0.018616
0.016612
25/100
T
/R
25
= 3980 K
Page 4 of 18
7.5
7.2
7.0
6.7
6.5
6.3
6.0
5.8
5.6
5.5
5.3
5.1
5.0
4.8
4.7
4.5
4.4
4.3
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.1
3.0
2.9
2.8
2.8
2.7
2.7
2.6
2.5
2.5
2.4
2.4
2.3
2.3
(%/K) R
2908
B
45.313
33.729
25.333
19.191
14.659
11.288
8.7588
6.8471
5.391
4.2739
3.4109
2.7396
2.214
1.7999
1.4716
1.2099
1.0000
0.83078
0.69361
0.58186
0.49036
0.41509
0.35288
0.30124
0.25818
0.22213
0.19183
0.16626
0.1446
0.12618
0.11047
0.097017
0.085463
0.075506
0.066899
0.059437
0.052948
0.047289
0.042341
0.038003
0.034189
0.030828
0.027859
25/100
T
/R
25
= 3460 K
6.0
5.8
5.6
5.5
5.3
5.1
5.0
4.9
4.7
4.6
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
3.0
2.9
2.8
2.8
2.7
2.6
2.6
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.1
2.1
2.0
2.0
(%/K)
B57981S
S981