NTC thermistors for
temperature measurement
Miniature sensors
with bendable wires
Series/Type:
Date:
B57869
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
B57869
S869
Applications
Heating systems
Industrial electronics
Automotive electronics
Features
Uni curve sensor
Fast response
High measuring accuracy
between 0
°C
and 70
°C
Excellent long-term stability
Epoxy resin encapsulation
Silver-plated nickel leads
UL approval (E69802)
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
Important notes
and
Cautions and warnings
at the end of this document.
Page 2 of 16
Temperature measurement
Miniature sensors with bendable wires
B57869
S869
Note
For calculation of the R/T characteristics refer to our special tool "NTC R/T calculation". You may
download this tool from 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
Important notes
and
Cautions and warnings
at the end of this document.
Page 3 of 16
Temperature measurement
Miniature sensors with bendable wires
B57869
S869
R/T characteristics
B57869S0302F140
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
8016
B
25/100
= 3988 K, R
25
= 3000
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]
288910
201030
141510
100950
72777
53100
39111
29121
21879
16599
12695
9795
7616
5970
4712
3747
3000
2417
1959
1598
1311
1081
895.9
746.4
624.9
525.6
444.4
377.4
321.7
275.3
236.6
204.0
176.6
153.4
133.6
116.8
102.5
90.27
79.63
273940
190980
135650
96918
70436
51450
37936
28444
21386
16328
12494
9695
7541
5913
4668
3713
2974
2396
1943
1585
1300
1073
889.2
741.0
620.5
522.0
440.0
373.7
317.6
271.9
233.0
201.0
173.6
150.8
131.1
114.6
100.4
88.44
77.86
303890
211080
147360
104980
75117
54750
40286
29798
22371
16870
12895
9895
7692
6027
4756
3781
3026
2438
1976
1611
1321
1089
902.5
751.8
629.3
529.2
448.8
381.1
325.8
278.7
240.1
207.0
179.6
155.9
136.2
119.0
104.6
92.10
81.41
5.2
5.0
4.1
4.0
3.2
3.1
3.0
2.3
2.3
1.6
1.6
1.0
1.0
1.0
0.9
0.9
0.9
0.9
0.8
0.8
0.8
0.8
0.7
0.7
0.7
0.7
1.0
1.0
1.3
1.2
1.5
1.5
1.7
1.7
1.9
1.9
2.1
2.0
2.2
0.7
0.7
0.6
0.6
0.5
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.4
0.4
0.5
0.5
0.6
0.6
0.7
0.7
0.8
0.8
0.9
α
(%/K)
7.4
7.1
6.9
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
2.9
2.8
2.7
2.7
2.6
2.5
2.5
Please read
Important notes
and
Cautions and warnings
at the end of this document.
Page 4 of 16
Temperature measurement
Miniature sensors with bendable wires
B57869
S869
B57869S0302F140
R/T No.
T (°C)
140.0
145.0
150.0
155.0
8016
B
25/100
= 3988 K, R
25
= 3000
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]
70.44
68.91
71.97
2.2
0.9
62.50
55.59
49.60
61.02
54.30
48.37
63.97
56.88
50.84
2.4
2.3
2.5
1.0
1.0
1.1
α
(%/K)
2.4
2.4
2.3
2.3
B57869S0302G140
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
8016
B
25/100
= 3988 K, R
25
= 3000
Ω,
T
R
= 25
°C, ∆R
R
/R
R
=
±
%
R
nom
[Ω]
R
min
[Ω]
R
max
[Ω]
∆R
R
/R
R
[±%]
∆T[±°C]
288910
201030
141510
100950
72777
53100
39111
29121
21879
16599
12695
9795
7616
5970
4712
3747
3000
2417
1959
1598
1311
1081
895.9
746.4
624.9
525.6
444.4
377.4
321.7
275.3
241860
172310
122970
89525
65288
48479
36055
27259
20648
15876
12226
9545
7428
5827
4603
3662
2934
2366
1919
1566
1285
1060
879.3
733.0
614.0
516.6
434.1
367.6
312.6
266.8
335970
229750
160040
112380
80266
57721
42167
30983
23110
17322
13163
10045
7805
6113
4822
3832
3066
2469
2000
1630
1336
1101
912.4
759.8
635.9
534.6
454.7
387.2
330.8
283.8
Page 5 of 16
α
(%/K)
7.4
7.1
6.9
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
16.3
14.3
13.1
11.3
10.3
8.7
7.8
6.4
5.6
4.4
3.7
2.6
2.5
2.4
2.3
2.3
2.2
2.1
2.1
2.0
2.0
1.9
1.9
1.8
1.8
1.7
2.3
2.6
2.8
3.1
2.2
2.0
1.9
1.7
1.6
1.4
1.3
1.1
1.0
0.8
0.7
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.7
0.8
0.9
1.0
Please read
Important notes
and
Cautions and warnings
at the end of this document.
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