NTC thermistors for
temperature measurement
Leaded NTCs,
lead spacing 2.5 mm
Series/Type:
B57881
Date:
March 2006
EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Applications
Temperature measurement
Features
High measuring accurancy
Cost-effective
Rugged design, epoxy resin encapsulation
Tinned copper leads
Lead spacing 2.5 mm
Options
Flexible coating of head and wires available on
request
Delivery mode
Bulk (standard),
cardboard tape, reeled or in Ammo pack
Dimensional drawing
Dimensions in mm
Approx. weight 130 mg
General technical data
Climatic category
(IEC 60068-1)
55/155/56
Max. power
(at 25
C)
P
25
100
mW
Resistance tolerance
R
R
/R
R
1,
3,
5
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
approx. 4
mW/K
Thermal cooling time constant
(in air)
c
approx. 10
s
Heat capacity
C
th
approx. 40
mJ/K
Electrical specification and ordering codes
R
25
No. of R/T
characteristic
B
25/100
K
Ordering code
+ =
Resistance tolerance
F =
1%
H =
3%
J =
5%
2.1 k
1008
3560
1%
B57881S0212+000
10 k
2003
3980
1%
B57881S0103+001
10 k
2908
3460
1%
B57881S0103+002
10 k
2001
3920
1%
B57881S0103+003
12 k
2901
3760
1%
B57881S0123+000
30 k
8018
3964
1%
B57881S0303+000
Temperature measurement
B57881
Leaded NTCs, lead spacing 2.5 mm
S881
Page 2 of 28
Please read Important notes and
Cautions and warnings at the end of this document.
Reliability data
Test
Standard
Test conditions
R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 155
C
t: 1000 h
< 2%
No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-78
Temperature of air: 40
C
Relative humidity of air: 93%
Duration: 56 days
< 1%
No visible
damage
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature:
55
C
Upper test temperature: 155
C
Number of cycles: 100
< 2%
No visible
damage
Endurance
P
max
: 100 mW
t: 1000 h
< 3%
No visible
damage
Long-term stability
(empirical value)
Temperature: 70
C
t: 10000 h
< 3%
No visible
damage
Temperature measurement
B57881
Leaded NTCs, lead spacing 2.5 mm
S881
Page 3 of 28
Please read Important notes and
Cautions and warnings at the end of this document.
R/T characteristics
B57881S0212F000
R/T No.
1008
T (
C)
B
25/100
= 3560 K, R
25
= 2100
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
111520
105460
117570
5.4
0.9
6.1
50.0
82567
78386
86747
5.1
0.8
6.0
45.0
61583
58680
64486
4.7
0.8
5.8
40.0
46263
44237
48289
4.4
0.8
5.7
35.0
34999
33579
36420
4.1
0.7
5.5
30.0
26661
25661
27661
3.8
0.7
5.4
25.0
20423
19717
21128
3.5
0.7
5.2
20.0
15786
15285
16287
3.2
0.6
5.1
15.0
12254
11899
12609
2.9
0.6
4.9
10.0
9594
9341
9847
2.6
0.5
4.8
5.0
7570
7390
7751
2.4
0.5
4.7
0.0
6020
5891
6149
2.1
0.5
4.5
5.0
4811
4719
4902
1.9
0.4
4.4
10.0
3872
3807
3937
1.7
0.4
4.3
15.0
3133
3087
3179
1.5
0.4
4.1
20.0
2552
2520
2584
1.3
0.3
4.0
25.0
2100
2079
2121
1.0
0.3
3.9
30.0
1742
1721
1764
1.2
0.3
3.8
35.0
1441
1421
1462
1.4
0.4
3.7
40.0
1199
1180
1219
1.6
0.5
3.6
45.0
1008
990.2
1026
1.8
0.5
3.5
50.0
851.4
834.6
868.2
2.0
0.6
3.4
55.0
717.6
702.2
732.9
2.1
0.6
3.3
60.0
608.0
594.0
622.0
2.3
0.7
3.2
65.0
519.0
506.2
531.8
2.5
0.8
3.1
70.0
444.8
433.2
456.5
2.6
0.9
3.1
75.0
382.1
371.5
392.6
2.8
0.9
3.0
80.0
329.3
319.7
338.9
2.9
1.0
2.9
85.0
285.4
276.7
294.1
3.1
1.1
2.8
90.0
248.3
240.4
256.2
3.2
1.2
2.8
95.0
217.1
209.9
224.3
3.3
1.2
2.7
100.0
190.6
184.0
197.1
3.4
1.3
2.6
105.0
167.2
161.3
173.2
3.6
1.4
2.6
110.0
147.2
141.8
152.7
3.7
1.5
2.5
115.0
130.0
125.0
134.9
3.8
1.6
2.4
120.0
115.0
110.5
119.6
3.9
1.6
2.4
125.0
102.3
98.14
106.4
4.0
1.7
2.3
130.0
91.17
87.38
94.96
4.2
1.8
2.3
135.0
81.32
77.85
84.79
4.3
1.9
2.2
Temperature measurement
B57881
Leaded NTCs, lead spacing 2.5 mm
S881
Page 4 of 28
Please read Important notes and
Cautions and warnings at the end of this document.
B57881S0212F000
R/T No.
1008
T (
C)
B
25/100
= 3560 K, R
25
= 2100
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
140.0
72.69
69.51
75.87
4.4
2.0
2.2
145.0
65.20
62.28
68.12
4.5
2.1
2.1
150.0
58.61
55.93
61.29
4.6
2.2
2.1
155.0
52.91
50.43
55.38
4.7
2.3
2.0
B57881S0212H000
R/T No.
1008
T (
C)
B
25/100
= 3560 K, R
25
= 2100
, T
R
= 25
C,
R
R
/R
R
=
3%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
111520
103230
119800
7.4
1.2
6.1
50.0
82567
76735
88399
7.1
1.2
6.0
45.0
61583
57449
65717
6.7
1.2
5.8
40.0
46263
43312
49214
6.4
1.1
5.7
35.0
34999
32879
37120
6.1
1.1
5.5
30.0
26661
25128
28194
5.8
1.1
5.4
25.0
20423
19308
21537
5.5
1.0
5.2
20.0
15786
14969
16602
5.2
1.0
5.1
15.0
12254
11654
12854
4.9
1.0
4.9
10.0
9594
9149
10039
4.6
1.0
4.8
5.0
7570
7238
7903
4.4
0.9
4.7
0.0
6020
5770
6269
4.1
0.9
4.5
5.0
4811
4622
4999
3.9
0.9
4.4
10.0
3872
3729
4014
3.7
0.9
4.3
15.0
3133
3025
3242
3.5
0.8
4.1
20.0
2552
2469
2635
3.3
0.8
4.0
25.0
2100
2037
2163
3.0
0.8
3.9
30.0
1742
1686
1799
3.2
0.9
3.8
35.0
1441
1392
1491
3.4
0.9
3.7
40.0
1199
1156
1243
3.6
1.0
3.6
45.0
1008
970.0
1047
3.8
1.1
3.5
50.0
851.4
817.6
885.3
4.0
1.2
3.4
55.0
717.6
687.9
747.3
4.1
1.2
3.3
60.0
608.0
581.8
634.2
4.3
1.3
3.2
65.0
519.0
495.8
542.2
4.5
1.4
3.1
70.0
444.8
424.3
465.4
4.6
1.5
3.1
75.0
382.1
363.9
400.3
4.8
1.6
3.0
80.0
329.3
313.1
345.5
4.9
1.7
2.9
85.0
285.4
271.0
299.8
5.1
1.8
2.8
90.0
248.3
235.4
261.1
5.2
1.9
2.8
Temperature measurement
B57881
Leaded NTCs, lead spacing 2.5 mm
S881
Page 5 of 28
Please read Important notes and
Cautions and warnings at the end of this document.
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