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