NTC thermistors for
temperature measurement
Leaded NTC thermistors,
lead spacing 2.5 mm
Series/Type:
Date:
B57881S
February 2009
© EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
B57881S
S881
Applications
Temperature measurement
Features
High measuring accuracy
Cost-effective
Rugged design, epoxy resin encapsulation
Tinned copper leads
Lead spacing 2.5 mm
Delivery mode
Bulk (standard), cardboard tape, reeled or in
Ammo pack on request
Dimensional drawing
Dimensions in mm
Approx. weight 130 mg
General technical data
Climatic category
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
(IEC 60068-1)
(at 25
°C)
55/155/56
100
±1, ±3, ±5
25
approx. 4
approx. 10
approx. 40
(in air)
(in air)
P
25
∆R
R
/R
R
T
R
δ
th
τ
c
C
th
mW
%
°C
mW/K
s
mJ/K
Electrical specification and ordering codes
R
25
Ω
2.1 k
10 k
10 k
10 k
12 k
30 k
+ = Resistance tolerance
F =
±1%
H =
±3%
J =
±5%
No. of R/T
characteristic
1008
2003
2908
2001
2901
8018
B
25/100
K
3560
±1%
3980
±1%
3460
±1%
3920
±1%
3760
±1%
3964
±1%
Ordering code
B57881S0212+000
B57881S0103+001
B57881S0103+002
B57881S0103+003
B57881S0123+000
B57881S0303+000
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 19
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
B57881S
S881
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
∆R
25
/R
25
(typical)
< 2%
Remarks
No visible
damage
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Long-term stability
(empirical value)
Storage at upper
category temperature
T: 155
°C
t: 1000 h
IEC
Temperature of air: 40
°C
60068-2-78 Relative humidity of air: 93%
Duration: 56 days
IEC
Lower test temperature: 55
°C
60068-2-14 Upper test temperature: 155
°C
Number of cycles: 100
P
max
: 100 mW
t: 1000 h
Temperature: 70
°C
t: 10000 h
< 1%
No visible
damage
No visible
damage
No visible
damage
No visible
damage
< 2%
< 3%
< 3%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 19
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
B57881S
S881
R/T characteristics
R/T No.
T (°C)
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
5.0
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
100.0
105.0
110.0
115.0
120.0
125.0
130.0
135.0
140.0
145.0
150.0
155.0
1008
2001
2003
B
25/100
= 3560 K
B
25/100
= 3920 K
B
25/100
= 3980 K
R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K)
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
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
87.762
61.922
44.168
31.833
23.173
17.03
12.621
9.4515
7.1273
5.427
4.1522
3.2063
2.5019
1.9679
1.5623
1.2488
1.0000
0.81105
0.6593
0.53922
0.44345
0.36674
0.30513
0.25514
0.21457
0.18131
0.1536
0.13064
0.11155
0.095606
0.082347
0.07118
0.061779
0.053799
0.04697
0.041132
0.036141
0.03185
0.02815
0.02495
0.02216
0.01972
0.01761
7.1
6.9
6.7
6.5
6.3
6.1
5.9
5.8
5.6
5.5
5.3
5.1
4.9
4.7
4.6
4.5
4.3
4.2
4.1
4.0
3.9
3.7
3.6
3.5
3.4
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
2.5
2.4
2.3
2.3
2.2
Page 4 of 19
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
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
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Temperature measurement
Leaded NTC thermistors, lead spacing 2.5 mm
B57881S
S881
R/T No.
T (°C)
160.0
165.0
170.0
175.0
180.0
185.0
190.0
195.0
200.0
205.0
210.0
215.0
220.0
225.0
230.0
235.0
240.0
245.0
250.0
1008
2001
2003
B
25/100
= 3560 K
B
25/100
= 3920 K
B
25/100
= 3980 K
R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K)
0.02279
2.0
0.020667
2.0
0.01878
0.01709
0.015582
0.014227
0.013012
0.011934
0.010964
0.0101
0.0093191
0.0085949
0.0079384
0.0073411
0.006798
0.0063087
0.0058623
0.0054487
0.0050705
1.9
1.9
1.8
1.8
1.8
1.7
1.7
1.7
1.6
1.6
1.6
1.5
1.5
1.5
1.5
1.4
1.4
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 19
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