NTC thermistors for
temperature measurement
Glass-encapsulated sensors,
standard type
Series/Type:
B57540
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, heat-resistive and
highly stable
For temperature measurement up to 250
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
Climatic category
(IEC 60068-1)
55/250/56
Max. power
(at 25
C)
P
25
18
mW
Resistance tolerance
R
R
/R
R
1,
2,
3,
5
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
approx. 0.4
mW/K
Thermal cooling time constant
(in air)
c
approx. 3
s
Heat capacity
C
th
approx. 1.3
mJ/K
Temperature measurement
B57540
Glass-encapsulated sensors
G540
Page 2 of 60
Please read Important notes and
Cautions and warnings at the end of this document.
1) B
100/200
2) B
200/300
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
5 k
8402
3480
3450
1%
3497
B57540G0502+00*
10 k
8407
3480
3450
1%
3497
B57540G0103+00*
20 k
8415
3992
3970
1%
4006
B57540G0203+00*
30 k
8415
3992
3970
1%
4006
B57540G0303+00*
50 k
8403
3992
3970
1%
4006
B57540G0503+00*
100 k
8404
4066
4036
1%
4085
B57540G0104+00*
230 k
8405
4240
4537
2
1)
%
4264
B57540G0234+00*
1400 k
8406
4557
5133
2
2)
%
4581
B57540G0145+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: 250
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
B57540
Glass-encapsulated sensors
G540
Page 3 of 60
Please read Important notes and
Cautions and warnings at the end of this document.
R/T characteristics
B57540G0502F000
R/T No.
8402
T (
C)
B
0/100
= 3450 K, R
25
= 5000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
259960
245980
273940
5.4
0.8
6.4
50.0
189950
180440
199450
5.0
0.8
6.2
45.0
140350
133820
146880
4.7
0.8
5.9
40.0
104800
100280
109320
4.3
0.8
5.7
35.0
79044
75892
82196
4.0
0.7
5.5
30.0
60186
57972
62400
3.7
0.7
5.4
25.0
46242
44678
47806
3.4
0.7
5.2
20.0
35834
34724
36945
3.1
0.6
5.0
15.0
27996
27205
28788
2.8
0.6
4.9
10.0
22043
21478
22609
2.6
0.5
4.7
5.0
17485
17080
17890
2.3
0.5
4.6
0.0
13968
13678
14258
2.1
0.5
4.4
5.0
11234
11027
11441
1.8
0.4
4.3
10.0
9094
8946
9241
1.6
0.4
4.2
15.0
7407
7302
7511
1.4
0.3
4.0
20.0
6068
5995
6141
1.2
0.3
3.9
25.0
5000
4950
5050
1.0
0.3
3.8
30.0
4142
4093
4192
1.2
0.3
3.7
35.0
3450
3402
3497
1.4
0.4
3.6
40.0
2887
2842
2932
1.6
0.4
3.5
45.0
2428
2386
2470
1.7
0.5
3.4
50.0
2051
2012
2090
1.9
0.6
3.3
55.0
1741
1705
1777
2.1
0.6
3.2
60.0
1484
1450
1517
2.2
0.7
3.2
65.0
1270
1239
1300
2.4
0.8
3.1
70.0
1091
1063
1119
2.5
0.8
3.0
75.0
940.8
915.5
966.2
2.7
0.9
2.9
80.0
814.4
791.3
837.5
2.8
1.0
2.8
85.0
707.5
686.5
728.6
3.0
1.1
2.8
90.0
616.8
597.5
636.0
3.1
1.1
2.7
95.0
539.4
521.9
556.9
3.2
1.2
2.6
100.0
473.3
457.3
489.3
3.4
1.3
2.6
105.0
416.6
402.0
431.2
3.5
1.4
2.5
110.0
367.7
354.4
381.1
3.6
1.5
2.5
115.0
325.6
313.4
337.8
3.7
1.6
2.4
120.0
289.0
277.9
300.2
3.9
1.6
2.4
125.0
257.3
247.1
267.6
4.0
1.7
2.3
130.0
229.7
220.3
239.1
4.1
1.8
2.2
135.0
205.5
196.9
214.2
4.2
1.9
2.2
Temperature measurement
B57540
Glass-encapsulated sensors
G540
Page 4 of 60
Please read Important notes and
Cautions and warnings at the end of this document.
B57540G0502F000
R/T No.
8402
T (
C)
B
0/100
= 3450 K, R
25
= 5000
, T
R
= 25
C,
R
R
/R
R
=
1%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
140.0
184.4
176.4
192.3
4.3
2.0
2.1
145.0
165.8
158.5
173.1
4.4
2.1
2.1
150.0
149.4
142.7
156.2
4.5
2.2
2.1
155.0
135.0
128.8
141.2
4.6
2.3
2.0
160.0
122.2
116.5
128.0
4.7
2.4
2.0
165.0
110.9
105.5
116.2
4.8
2.5
1.9
170.0
100.8
95.86
105.7
4.9
2.6
1.9
175.0
91.82
87.24
96.40
5.0
2.7
1.8
180.0
83.81
79.55
88.06
5.1
2.8
1.8
185.0
76.64
72.68
80.60
5.2
2.9
1.8
190.0
70.21
66.53
73.90
5.3
3.0
1.7
195.0
64.44
61.00
67.88
5.3
3.1
1.7
200.0
59.25
56.04
62.46
5.4
3.3
1.7
205.0
54.56
51.56
57.56
5.5
3.4
1.6
210.0
50.33
47.53
53.14
5.6
3.5
1.6
215.0
46.51
43.88
49.14
5.7
3.6
1.6
220.0
43.04
40.57
45.50
5.7
3.7
1.5
225.0
39.89
37.57
42.20
5.8
3.9
1.5
230.0
37.02
34.85
39.20
5.9
4.0
1.5
235.0
34.42
32.37
36.46
5.9
4.1
1.4
240.0
32.04
30.11
33.97
6.0
4.2
1.4
245.0
29.86
28.05
31.68
6.1
4.4
1.4
250.0
27.88
26.16
29.59
6.2
4.5
1.4
B57540G0502G000
R/T No.
8402
T (
C)
B
0/100
= 3450 K, R
25
= 5000
, T
R
= 25
C,
R
R
/R
R
=
2%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
259960
243260
276650
6.4
1.0
6.4
50.0
189950
178460
201430
6.0
1.0
6.2
45.0
140350
132370
148330
5.7
1.0
5.9
40.0
104800
99201
110400
5.3
0.9
5.7
35.0
79044
75078
83010
5.0
0.9
5.5
30.0
60186
57354
63018
4.7
0.9
5.4
25.0
46242
44204
48279
4.4
0.8
5.2
20.0
35834
34358
37310
4.1
0.8
5.0
15.0
27996
26920
29073
3.8
0.8
4.9
10.0
22043
21254
22833
3.6
0.8
4.7
5.0
17485
16903
18067
3.3
0.7
4.6
Temperature measurement
B57540
Glass-encapsulated sensors
G540
Page 5 of 60
Please read Important notes and
Cautions and warnings at the end of this document.
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