NTC thermistors for
temperature measurement
Glass-encapsulated sensors,
standard type
Series/Type:
B57540G, B57540G1
Date: following products presented in this data sheet are being withdrawn.
February 2009
The
Ordering Code
B57540G0145*
B57540G0234*
Substitute Product
B57540G1104*
B57540G1104*
Date of
Withdrawal
2012-03-23
2012-03-23
Deadline Last
Orders
2012-06-28
2012-06-28
Last Shipments
2012-09-28
2012-09-28
For further information please contact your nearest EPCOS sales office, which will also support
you in selecting a suitable substitute. The addresses of our worldwide sales network are
presented at www.epcos.com/sales.
© EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Temperature measurement
Glass-encapsulated sensors
Applications
Temperature measurement
Features
Glass-encapsulated, heat-resistive and
highly stable
For temperature measurement up to 250
°C
Very short response time
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
(IEC 60068-1)
(at 25
°C)
P
25
∆R
R
/R
R
T
R
δ
th
τ
c
C
th
B57540G, B57540G1
G540/G1540
Dimensional drawing
Dimensions in mm
(in air)
(in air)
55/250/56
18
±1, ±2, ±3
25
approx. 0.4
approx. 3
approx. 1.3
mW
%
°C
mW/K
s
mJ/K
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 18
Temperature measurement
Glass-encapsulated sensors
Electrical specification and ordering codes
R
25
Ω
5k
5k
10 k
10 k
10 k
10 k
20 k
20 k
30 k
30 k
50 k
50 k
100 k
100 k
230 k
230 k
1400 k
1400 k
No. of R/T
characteristic
8402
8402
7003
7003
8307
8307
8415
8415
7002
7002
8403
8403
8304
8304
8405
8405
8406
8406
B
25/85
K
3480
3480
3612
3612
3478
3478
3992
3992
3973
3973
3992
3992
4072
4072
4240
4240
4557
4557
B
0/100
K
3450
±1%
3450
±1%
3586
3586
3450
3450
3970
±1%
3970
±1%
3944
3944
3970
±1%
3970
±1%
4036
4036
4537
±2%
1)
4537
±2%
1)
5133
±2%
2)
5133
±2%
2)
B
25/100
K
3497
3497
3625
±1%
3625
±1%
3492
±1%
3492
±1%
4006
4006
3988
±1%
3988
±1%
4006
4006
4092
±1%
4092
±1%
4264
4264
4581
4581
B57540G, B57540G1
G540/G1540
Ordering code
B57540G0502+000
B57540G0502+002
B57540G1103+005
B57540G1103+007
B57540G1103+000
B57540G1103+002
B57540G0203+000
B57540G0203+002
B57540G1303+005
B57540G1303+007
B57540G0503+000
B57540G0503+002
B57540G1104+000
B57540G1104+002
B57540G0234+000
B57540G0234+002
B57540G0145+000
B57540G0145+002
+ = Resistance tolerance
F =
±1%
G =
±2%
H =
±3%
The last three digits of the ordering code denote:
000 and 005 = dumet wires
002 and 007 = nickel-plated wires
1) B
100/200
2) B
200/300
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 18
Temperature measurement
Glass-encapsulated sensors
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
B57540G, B57540G1
G540/G1540
Storage in damp
heat, steady state
Rapid temperature
cycling
Storage at upper
category temperature
T: 250
°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
∆R
25
/R
25
(typical)
< 3%
Remarks
No visible
damage
< 2%
No visible
damage
No visible
damage
< 2%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 18
Temperature measurement
Glass-encapsulated sensors
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
7002
7003
8304
B57540G, B57540G1
G540/G1540
B
25/100
= 3988 K
B
25/100
= 3625 K
B
25/100
= 4092 K
R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K)
96.33
66.866
47.037
33.508
24.156
17.613
12.98
9.6643
7.2656
5.5129
4.22
3.2575
2.5348
1.9876
1.5699
1.2488
1.0000
0.80594
0.65355
0.53312
0.43735
0.36074
0.29911
0.24925
0.20872
0.17558
0.14837
0.12592
0.10731
0.091816
0.078862
0.067988
0.058824
0.051071
0.044489
0.03888
0.034084
0.02997
0.02643
0.023373
0.020727
0.018429
0.016427
7.4
7.2
6.9
6.7
6.4
6.2
6.0
5.8
5.6
5.4
5.3
5.1
4.9
4.8
4.6
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
2.4
2.4
2.3
2.3
63.225
45.46
33.07
24.324
18.081
13.575
10.29
7.8716
6.0739
4.7258
3.7062
2.9287
2.3311
1.8684
1.5075
1.224
1.0000
0.82176
0.67909
0.56422
0.47122
0.3955
0.33355
0.2826
0.24049
0.20553
0.17637
0.15195
0.13141
0.11406
0.099352
0.086837
0.076149
0.066989
0.059112
0.052316
0.046433
0.041327
0.03688
0.032998
0.029598
0.026612
0.023984
6.7
6.5
6.3
6.0
5.8
5.6
5.4
5.3
5.1
4.9
4.8
4.6
4.5
4.4
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.9
2.8
2.7
2.7
2.6
2.5
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.1
2.1
100.11
69.56
48.945
34.853
25.102
18.275
13.443
9.9853
7.4867
5.6636
4.3212
3.324
2.5769
2.0127
1.5834
1.2542
1.0000
0.80239
0.64776
0.52598
0.4295
0.35262
0.291
0.24136
0.20114
0.16841
0.14164
0.11963
0.10147
0.086407
0.073867
0.063383
0.054584
0.04717
0.040901
0.035581
0.03105
0.027179
0.023861
0.021008
0.018548
0.016419
0.014573
7.4
7.2
6.9
6.7
6.5
6.2
6.0
5.9
5.7
5.5
5.3
5.2
5.0
4.9
4.7
4.6
4.5
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.3
3.2
3.1
3.0
3.0
2.9
2.8
2.8
2.7
2.6
2.6
2.5
2.5
2.4
2.4
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 18
