NTC thermistors for
temperature measurement
Miniature sensors
with bendable wires
Series/Type:
Date:
B57869S
February 2009
© EPCOS AG 2009. 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
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 resin 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
Rated temperature
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
T
R
δ
th
τ
c
C
th
55/155/56
60
±0.2, ±0.5
25
approx. 1.5
approx. 12
approx. 18
mW
K
°C
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 13
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 (http://www.epcos.com
→
Design 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
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
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 13
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
30.24
22.1
16.32
12.17
9.153
6.945
5.313
4.097
3.183
2.491
1.963
1.557
1.244
1.0000
0.8083
0.6572
0.5373
0.4418
0.365
0.303
0.2527
0.2118
0.1783
0.1508
0.128
0.1091
0.0933
0.08016
0.0691
0.05974
0.05183
0.04512
0.0394
0.0345
0.03032
0.02672
0.02361
0.02091
0.01857
0.016537
6.3
6.1
5.9
5.8
5.6
5.4
5.2
5.1
4.9
4.8
4.7
4.6
4.4
4.3
4.2
4.1
4.0
3.9
3.7
3.7
3.6
3.5
3.4
3.3
3.2
3.2
3.1
3.0
2.9
2.9
2.8
2.8
2.7
2.6
2.6
2.5
2.5
2.4
2.4
2.3
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 13
Temperature measurement
Miniature sensors with bendable wires
B57869S
S869
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 13
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