NTC thermistors for
temperature measurement
Miniature sensors
with bendable wires
Series/Type:
Date:
B57861S
March 2013
© EPCOS AG 2013. 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
B57861S
S861
Applications
Temperature measurement
Features
Short response time
High measuring accuracy
Tight B value tolerances
available
Epoxy resin encapsulation
PTFE-insulated leads of
silver-plated nickel wire,
AWG 30 (50 mm)
PTFE-insulated leads of
silver-plated Cu wire
(19 x 0.07 mm),
AWG 28 (350 mm)
UL approval (E69802)
Options
Alternative lead lengths on
request
Delivery mode
Bulk
General technical data
Climatic category
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
Dimensional drawings
Length
50 mm
350 mm
Dimensions in mm
(IEC 60068-1)
(at 25
°C)
(in air)
(in air)
P
25
∆R
R
/R
R
T
R
δ
th
τ
c
C
th
55/155/56
60
±1, ±3, ±5
25
approx. 1.5 / 3.2
1)
approx. 15 / 12
1)
approx. 22.5 / 38.4
1)
mW
%
°C
mW/K
s
mJ/K
1) For PTFE-insulated leads of silver-plated Cu wire (19 x 0.07 mm), AWG 28 (350 mm).
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 20
Temperature measurement
Miniature sensors with bendable wires
B57861S
S861
Electrical specification and ordering codes
R
25
Ω
Component length
mm
No. of R/T
characteristic
B
25/100
K
Ordering code
B value tolerance = 0.3%, resistance tolerance =
±1%
5k
50
8016
3988
±0.3%
10 k
50
8016
3988
±0.3%
30 k
50
8018
3964
±0.3%
B value tolerance = 1%, resistance tolerance =
±1%
10 k
350
8016
3988
±1%
B value tolerance = 1.0%, resistance tolerance =
±1%, ±3%
or
±5%
2k
50
1008
3560
±1%
3k
50
8016
3988
±1%
5k
50
8016
3988
±1%
10 k
50
8016
3988
±1%
30 k
50
8018
3964
±1%
50 k
50
2901
3760
±1%
+ = Resistance tolerance
F =
±1%
H =
±3%
J =
±5%
B57861S0502F045
B57861S0103F045
B57861S0303F045
B57861S0103A039
B57861S0202+040
B57861S0302+040
B57861S0502+040
B57861S0103+040
B57861S0303+040
B57861S0503+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
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
: 60 mW
t: 1000 h
Temperature: 70
°C
t: 10000 h
< 1%
No visible
damage
No visible
damage
No visible
damage
No visible
damage
< 1%
< 3%
< 2%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 20
Temperature measurement
Miniature sensors with bendable wires
B57861S
S861
Reliability data according to AEC Q200, Rev. D
Test
High temperature
exposure (storage)
Biased humidity
Standard
MIL-STD-202,
method 108
MIL-STD-202,
method 103
Test conditions
∆R
25
/R
25
(typical)
< 2%
<2%
Remarks
No visible
damage
No visible
damage
Operational life
Temperature
cycling
Terminal strength
(leaded)
Mechanical shock
Storage at T = +125
°C
t = 1000 h
T = 85
°C
Relative humidity of air 85%
t = 1000 h
Test voltage max. 0.3 V DC on
NTC
1)
MIL-STD-202, T = +125
°C
method 108
t = 1000 h
Test voltage max. 0.3 V DC on
NTC
1)
JESD 22,
Lower test temperature: 55
°C
method JA-104 Upper test temperature: 125
°C
1000 cycles
Dwell time: max. 30 min at each
temperature
Transition time in air: max. 1 min
MIL-STD-202, Test leaded device integrity
method 211
Condition A: 2.27 N
2)
MIL-STD-202,
method 213,
condition C
MIL-STD-202,
method 204
Acceleration: 40
g
2)
Pulse duration: 6 ms
Number of bumps: 3, each
direction
Acceleration: 5
g
t = 20 min
12 cycles in each of 3 directions
Frequency range: 10 to 2000 Hz
< 2%
No visible
damage
< 2%
No visible
damage
< 1%
< 1%
No visible
damage
No visible
damage
Vibration
< 1%
No visible
damage
1) Self heating of the NTC thermistor must not exceed 0.2 K, steady state. Test conditions deviating from AEC Q200, Rev. D.
2) Deviating from AEC Q200, Rev. D.
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 20
Temperature measurement
Miniature sensors with bendable wires
B57861S
S861
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
2901
B
25/100
= 3560 K
B
25/100
= 3760 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
63.969
46.179
33.738
24.927
18.611
14.033
10.679
8.198
6.3123
4.9014
3.821
3.0027
2.3801
1.9
1.5257
1.233
1.0000
0.81679
0.67166
0.55527
0.46095
0.38459
0.32184
0.27068
0.22907
0.19468
0.16607
0.14221
0.12218
0.10533
0.09123
0.079284
0.069062
0.06034
0.052886
0.046482
0.040985
0.036233
0.032101
0.02851
0.025373
0.022633
0.020231
6.7
6.4
6.2
6.0
5.8
5.6
5.4
5.3
5.2
5.1
4.9
4.7
4.6
4.5
4.3
4.3
4.1
4.0
3.9
3.8
3.8
3.7
3.6
3.5
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
2.5
2.4
2.4
2.3
2.3
2.3
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 20
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