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