NTC thermistors for
temperature measurement
Glass-encapsulated sensors
with insulation
Series/Type:
B57551
Date:
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.
Applications
Automotive electronics
Industrial electronics
Home appliances
Features
Glass-encapsulated NTC thermistor,
heat-resistant and highly stable
Coating of glass body and leads for
electrical insulation
For temperature measurement up to 260
C
Fast response
Small dimensions
Leads: dumet wires (copper-clad FeNi)
Options
Leads: nickel-plated dumet wires.
Alternative dimensions available on request.
Delivery mode
Bulk
Dimensional drawing
Dimensions in mm
General technical data
1) Medium: NaCl-solution; Temperature: Room temperature
Climatic category
(IEC 60068-1)
55/260/56
Max. power
(at 25
C)
P
25
32
mW
Resistance tolerance
R
R
/R
R
1,
2,
3,
5
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
approx. 0.8
mW/K
Thermal cooling time constant
(in air)
c
approx. 9
s
Heat capacity
C
th
approx. 7.2
mJ/K
Insulation resistance
1)
(V = 100 VDC)
R
ins
100
M
Test voltage
1)
(t = 1 s)
V
test
500
VDC
Temperature measurement
B57551
Glass-encapsulated sensors with insulation
G551
Page 2 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
Electrical specification and ordering codes
R
25
No. of R/T
characteristic
B
25/85
K
B
0/100
K
B
25/100
K
Ordering code
+ =
Resistance tolerance
* =
Leads
F =
1%
G =
2%
H =
3%
J =
5%
0 = dumet wires
2 = nickel-plated wires
10 k
8407
3480
3450
1%
3497
B57551G0103+00*
Reliability data
Test
Standard
Test conditions
R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 260
C
t: 1000 h
< 3%
No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-67
Temperature of air: 85
C
Relative humidity of air: 85%
Duration: 56 days
< 2%
No visible
damage
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature:
55
C
Upper test temperature: 200
C
Number of cycles: 1000
< 2%
No visible
damage
Temperature measurement
B57551
Glass-encapsulated sensors with insulation
G551
Page 3 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
R/T characteristics
B57551G0103F000
R/T No.
8407
T (
C)
B
0/100
= 3450 K, R
25
= 10000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
519910
491950
547870
5.4
0.8
6.4
50.0
379890
360880
398910
5.0
0.8
6.2
45.0
280700
267640
293750
4.7
0.8
5.9
40.0
209600
200570
218640
4.3
0.8
5.7
35.0
158090
151780
164390
4.0
0.7
5.5
30.0
120370
115940
124800
3.7
0.7
5.4
25.0
92484
89355
95612
3.4
0.7
5.2
20.0
71668
69447
73889
3.1
0.6
5.0
15.0
55993
54410
57576
2.8
0.6
4.9
10.0
44087
42955
45218
2.6
0.5
4.7
5.0
34971
34161
35780
2.3
0.5
4.6
0.0
27936
27356
28516
2.1
0.5
4.4
5.0
22468
22054
22882
1.8
0.4
4.3
10.0
18187
17892
18482
1.6
0.4
4.2
15.0
14813
14605
15021
1.4
0.3
4.0
20.0
12136
11991
12282
1.2
0.3
3.9
25.0
10000
9900
10100
1.0
0.3
3.8
30.0
8284
8186
8383
1.2
0.3
3.7
35.0
6899
6804
6994
1.4
0.4
3.6
40.0
5774
5684
5864
1.6
0.4
3.5
45.0
4856
4772
4940
1.7
0.5
3.4
50.0
4103
4024
4181
1.9
0.6
3.3
55.0
3482
3409
3554
2.1
0.6
3.2
60.0
2967
2901
3034
2.2
0.7
3.2
65.0
2539
2479
2600
2.4
0.8
3.1
70.0
2182
2126
2237
2.5
0.8
3.0
75.0
1882
1831
1932
2.7
0.9
2.9
80.0
1629
1583
1675
2.8
1.0
2.8
85.0
1415
1373
1457
3.0
1.1
2.8
90.0
1234
1195
1272
3.1
1.1
2.7
95.0
1079
1044
1114
3.2
1.2
2.6
100.0
946.6
914.6
978.6
3.4
1.3
2.6
105.0
833.1
803.9
862.3
3.5
1.4
2.5
110.0
735.5
708.8
762.1
3.6
1.5
2.5
115.0
651.1
626.7
675.5
3.7
1.6
2.4
120.0
578.1
555.8
600.4
3.9
1.6
2.4
125.0
514.6
494.2
535.1
4.0
1.7
2.3
130.0
459.4
440.6
478.1
4.1
1.8
2.2
135.0
411.1
393.8
428.3
4.2
1.9
2.2
Temperature measurement
B57551
Glass-encapsulated sensors with insulation
G551
Page 4 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
B57551G0103F000
R/T No.
8407
T (
C)
B
0/100
= 3450 K, R
25
= 10000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
140.0
368.8
352.9
384.6
4.3
2.0
2.1
145.0
331.6
317.0
346.2
4.4
2.1
2.1
150.0
298.9
285.4
312.3
4.5
2.2
2.1
155.0
270.0
257.5
282.4
4.6
2.3
2.0
160.0
244.4
232.9
255.9
4.7
2.4
2.0
165.0
221.7
211.1
232.4
4.8
2.5
1.9
170.0
201.6
191.7
211.5
4.9
2.6
1.9
175.0
183.6
174.5
192.8
5.0
2.7
1.8
180.0
167.6
159.1
176.1
5.1
2.8
1.8
185.0
153.3
145.4
161.2
5.2
2.9
1.8
190.0
140.4
133.1
147.8
5.3
3.0
1.7
195.0
128.9
122.0
135.8
5.3
3.1
1.7
200.0
118.5
112.1
124.9
5.4
3.3
1.7
205.0
109.1
103.1
115.1
5.5
3.4
1.6
210.0
100.7
95.05
106.3
5.6
3.5
1.6
215.0
93.01
87.76
98.27
5.7
3.6
1.6
220.0
86.08
81.14
91.01
5.7
3.7
1.5
225.0
79.78
75.15
84.41
5.8
3.9
1.5
230.0
74.05
69.70
78.40
5.9
4.0
1.5
235.0
68.83
64.74
72.93
5.9
4.1
1.4
240.0
64.08
60.22
67.93
6.0
4.2
1.4
245.0
59.73
56.09
63.36
6.1
4.4
1.4
250.0
55.75
52.32
59.18
6.2
4.5
1.4
255.0
52.11
48.87
55.35
6.2
4.6
1.3
260.0
48.76
45.70
51.83
6.3
4.8
1.3
B57551G0103G000
R/T No.
8407
T (
C)
B
0/100
= 3450 K, R
25
= 10000
, T
R
= 25
C,
R
R
/R
R
=
2%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
519910
486530
553300
6.4
1.0
6.4
50.0
379890
356930
402860
6.0
1.0
6.2
45.0
280700
264740
296660
5.7
1.0
5.9
40.0
209600
198400
220800
5.3
0.9
5.7
35.0
158090
150160
166020
5.0
0.9
5.5
30.0
120370
114710
126040
4.7
0.9
5.4
25.0
92484
88409
96559
4.4
0.8
5.2
20.0
71668
68716
74621
4.1
0.8
5.0
15.0
55993
53839
58146
3.8
0.8
4.9
Temperature measurement
B57551
Glass-encapsulated sensors with insulation
G551
Page 5 of 13
Please read Important notes and
Cautions and warnings at the end of this document.
PDF 
ZIP