NTC thermistors for
temperature measurement
Miniature sensors
with bendable wires
Series/Type:
Date:
B57869S
January 2018
© EPCOS AG 2018. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Temperature measurement
Miniature sensors with bendable wires
B57869S
S869
Applications
Temperature measurement
Features
Uni curve sensor
Short response time
High measuring accuracy
between 0
°C
and 70
°C
Excellent long-term stability
Epoxy encapsulation
Silver-plated nickel leads
UL approval (E69802)
Options
Alternative lead lengths on request
Delivery mode
Bulk
General technical data
Climatic category
Max. power
Temperature tolerance
Dissipation factor
Thermal cooling time constant
Heat capacity
(IEC 60068-1)
(at 25
°C)
(0 ... 70
°C)
(in air)
(in air)
Dimensional drawing
Dimensions in mm
Approx. weight 60 mg
P
25
∆T
δ
th
τ
c
C
th
55/155/56
60
±0.2, ±0.5
approx. 1.5
approx. 12
approx. 18
mW
K
mW/K
s
mJ/K
Electrical specification and ordering codes
R
25
Ω
3k
5k
10 k
30 k
+ = Temperature tolerance
F =
±0.2
K
G =
±0.5
K
No. of R/T
characteristic
8016
8016
8016
8018
B
25/100
K
3988
3988
3988
3964
Ordering code
B57869S0302+140
B57869S0502+140
B57869S0103+140
B57869S0303+140
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 21
Temperature measurement
Miniature sensors with bendable wires
B57869S
S869
Note
For calculation of the R/T characteristics refer to our special tool "NTC R/T calculation". You may
download this tool from the Internet (www.epcos.com/tools
→
NTC Thermistors
→
NTC R/T
Calculation).
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 21
Temperature measurement
Miniature sensors with bendable wires
B57869S
S869
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
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
< 2%
No visible
damage
< 2%
No visible
damage
< 1%
No visible
damage
No visible
damage
Vibration
Acceleration: 40
g
2)
< 1%
Pulse duration: 6 ms
Number of bumps: 3, each
direction
Acceleration: 5
g
< 1%
t = 20 min
12 cycles in each of 3 orientations
Frequency range: 10 ... 2000 Hz
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 21
Temperature measurement
Miniature sensors with bendable wires
B57869S
S869
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
8016
8018
B
25/100
= 3988 K
B
25/100
= 3964 K
R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K)
96.3
67.01
47.17
33.65
24.26
17.7
13.04
9.707
7.293
5.533
4.232
3.265
2.539
1.99
1.571
1.249
1.0000
0.8057
0.6531
0.5327
0.4369
0.3603
0.2986
0.2488
0.2083
0.1752
0.1481
0.1258
0.1072
0.09177
0.07885
0.068
0.05886
0.05112
0.04454
0.03893
0.03417
0.03009
0.02654
0.02348
0.02083
0.01853
0.01653
7.4
7.2
6.9
6.7
6.4
6.2
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
3.2
3.1
3.0
2.9
2.9
2.8
2.7
2.6
2.6
2.5
2.5
2.4
2.4
2.3
2.3
82.408
58.344
41.775
30.235
22.109
16.327
12.171
9.1548
6.9458
5.3135
4.0972
3.1834
2.4915
1.9637
1.5582
1.2444
1.0000
0.80843
0.65732
0.53743
0.44175
0.36497
0.30303
0.2528
0.21187
0.17836
0.15079
0.128
0.1091
0.093342
0.080158
0.069084
0.059747
0.051845
0.045134
0.039416
0.034527
0.030333
0.026724
0.02361
0.020914
0.018575
0.016538
7.0
6.8
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.3
5.1
5.0
4.8
4.7
4.6
4.4
4.3
4.2
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
2.9
2.8
2.7
2.7
2.6
2.6
2.5
2.5
2.4
2.3
2.3
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 21
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