NTC thermistors for
temperature measurement
Miniature sensors
with bendable wires
Series/Type:
B57861
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
Heating systems
Industrial electronics
Automotive electronics
Features
Fast response
High measuring accuracy
Different tolerances available
Epoxy resin encapsulation
PTFE-insulated leads of silver-plated
nickel wire, AWG 30
UL approval (E69802)
Options
Non-standard lead lengths.
Also available with close B value tolerance.
Delivery mode
Bulk
Dimensional drawing
Dimensions in mm
Approx. weight 60 mg
General technical data
Climatic category
(IEC 60068-1)
55/155/56
For types with close B value tolerance
0.3%
40/100/56
Max. power
(at 25
C)
P
25
60
mW
Resistance tolerance
R
R
/R
R
1,
3,
5
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
approx. 1.5
mW/K
Thermal cooling time constant
(in air)
c
approx. 15
s
Heat capacity
C
th
approx. 22.5
mJ/K
Temperature measurement
B57861
Miniature sensors with bendable wires
S861
Page 2 of 34
Please read Important notes and
Cautions and warnings at the end of this document.
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%
B value tolerance = 0.3%, resistance tolerance =
1%
5 k
8016
3988
0.3%
B57861S0502F045
10 k
8016
3988
0.3%
B57861S0103F045
30 k
8018
3964
0.3%
B57861S0303F045
B value tolerance = 1.0%, resistance tolerance =
1%,
3% or
5%
2 k
1008
3560
1%
B57861S0202+040
3 k
8016
3988
1%
B57861S0302+040
5 k
8016
3988
1%
B57861S0502+040
10 k
8016
3988
1%
B57861S0103+040
30 k
8018
3964
1%
B57861S0303+040
50 k
2901
3760
1%
B57861S0503+040
100 k
2014
4540
1%
B57861S0104+040
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
< 1%
No visible
damage
Long-term stability
(empirical value)
Temperature: 70
C
t: 10000 h
< 2%
No visible
damage
Temperature measurement
B57861
Miniature sensors with bendable wires
S861
Page 3 of 34
Please read Important notes and
Cautions and warnings at the end of this document.
R/T characteristics
B57861S0502F045
R/T No.
8016
T (
C)
B
25/100
= 3988 K, R
25
= 5000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
40.0
168250
164600
171900
2.2
0.3
6.7
35.0
121300
118800
123790
2.1
0.3
6.4
30.0
88500
86767
90232
2.0
0.3
6.2
25.0
65185
63973
66396
1.9
0.3
6.0
20.0
48535
47679
49391
1.8
0.3
5.8
15.0
36465
35855
37074
1.7
0.3
5.6
10.0
27665
27227
28103
1.6
0.3
5.4
5.0
21158
20840
21475
1.5
0.3
5.3
0.0
16325
16094
16556
1.4
0.3
5.1
5.0
12694
12524
12864
1.3
0.3
5.0
10.0
9950
9824
10076
1.3
0.3
4.8
15.0
7854
7760
7947
1.2
0.3
4.7
20.0
6245
6175
6315
1.1
0.2
4.5
25.0
5000
4950
5050
1.0
0.2
4.4
30.0
4029
3984
4073
1.1
0.3
4.3
35.0
3266
3227
3304
1.2
0.3
4.1
40.0
2664
2630
2697
1.2
0.3
4.0
45.0
2184
2156
2213
1.3
0.3
3.9
50.0
1802
1777
1826
1.4
0.4
3.8
55.0
1493
1472
1514
1.4
0.4
3.7
60.0
1244
1226
1262
1.5
0.4
3.6
65.0
1042
1026
1057
1.5
0.4
3.5
70.0
876.0
862.2
889.8
1.6
0.5
3.4
75.0
740.7
728.6
752.7
1.6
0.5
3.3
80.0
629.0
618.5
639.5
1.7
0.5
3.2
85.0
536.2
526.9
545.4
1.7
0.5
3.2
90.0
458.8
450.7
467.0
1.8
0.6
3.1
95.0
394.3
387.1
401.4
1.8
0.6
3.0
100.0
340.0
333.7
346.3
1.9
0.6
2.9
B57861S0103F045
R/T No.
8016
T (
C)
B
25/100
= 3988 K, R
25
= 10000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
40.0
336500
329200
343800
2.2
0.3
6.7
35.0
242590
237590
247590
2.1
0.3
6.4
30.0
177000
173540
180470
2.0
0.3
6.2
25.0
130370
127950
132790
1.9
0.3
6.0
Temperature measurement
B57861
Miniature sensors with bendable wires
S861
Page 4 of 34
Please read Important notes and
Cautions and warnings at the end of this document.
B57861S0103F045
R/T No.
8016
T (
C)
B
25/100
= 3988 K, R
25
= 10000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
20.0
97070
95358
98782
1.8
0.3
5.8
15.0
72929
71710
74148
1.7
0.3
5.6
10.0
55330
54454
56206
1.6
0.3
5.4
5.0
42315
41681
42949
1.5
0.3
5.3
0.0
32650
32187
33113
1.4
0.3
5.1
5.0
25388
25048
25727
1.3
0.3
5.0
10.0
19900
19649
20151
1.3
0.3
4.8
15.0
15708
15521
15895
1.2
0.3
4.7
20.0
12490
12350
12630
1.1
0.2
4.5
25.0
10000
9900
10100
1.0
0.2
4.4
30.0
8057
7967
8147
1.1
0.3
4.3
35.0
6531
6454
6608
1.2
0.3
4.1
40.0
5327
5261
5393
1.2
0.3
4.0
45.0
4369
4312
4426
1.3
0.3
3.9
50.0
3603
3554
3652
1.4
0.4
3.8
55.0
2986
2944
3029
1.4
0.4
3.7
60.0
2488
2451
2525
1.5
0.4
3.6
65.0
2083
2051
2115
1.5
0.4
3.5
70.0
1752
1724
1780
1.6
0.5
3.4
75.0
1481
1457
1505
1.6
0.5
3.3
80.0
1258
1237
1279
1.7
0.5
3.2
85.0
1072
1054
1091
1.7
0.5
3.2
90.0
917.7
901.5
933.9
1.8
0.6
3.1
95.0
788.5
774.2
802.8
1.8
0.6
3.0
100.0
680.0
667.4
692.6
1.9
0.6
2.9
B57861S0303F045
R/T No.
8018
T (
C)
B
25/100
= 3964 K, R
25
= 30000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
40.0
907060
887450
926670
2.2
0.3
6.4
35.0
663280
649650
676910
2.1
0.3
6.2
30.0
489810
480250
499370
2.0
0.3
6.0
25.0
365130
358360
371900
1.9
0.3
5.8
20.0
274640
269810
279480
1.8
0.3
5.6
15.0
208370
204900
211850
1.7
0.3
5.4
10.0
159410
156890
161920
1.6
0.3
5.3
5.0
122920
121080
124750
1.5
0.3
5.1
0.0
95501
94149
96852
1.4
0.3
5.0
Temperature measurement
B57861
Miniature sensors with bendable wires
S861
Page 5 of 34
Please read Important notes and
Cautions and warnings at the end of this document.
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