NTC thermistors for
temperature measurement
Glass-encapsulated sensors
with insulation
Series/Type:
Date:
B57561G, B57561G1
February 2009
© EPCOS AG 2009. 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
B57561G, B57561G1
G561/G1561
Applications
Temperature measurement
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
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 V DC)
(t = 1 s)
P
25
∆R
R
/R
R
T
R
δ
th
τ
c
C
th
R
ins
V
test
55/260/56
50
±1, ±2, ±3
25
approx. 1.5
approx. 18
approx. 27
≥
100
500
mW
%
°C
mW/K
s
mJ/K
MΩ
V DC
1) Medium: NaCl-solution; Temperature: Room temperature
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 15
Temperature measurement
Glass-encapsulated sensors with insulation
B57561G, B57561G1
G561/G1561
Electrical specification and ordering codes
R
25
Ω
2k
2k
10 k
10 k
10 k
10 k
30 k
30 k
100 k
100 k
No. of R/T
characteristic
8401
8401
8307
8307
7003
7003
7002
7002
8304
8304
B
25/85
K
3420
3420
3478
3478
3612
3612
3973
3973
4072
4072
B
0/100
K
3390
±1%
3390
±1%
3450
3450
3586
3586
3944
3944
4036
4036
B
25/100
K
3436
3436
3492
±1%
3492
±1%
3625
±1%
3625
±1%
3988
±1%
3988
±1%
4092
±1%
4092
±1%
Ordering code
B57561G0202+000
B57561G0202+002
B57561G1103+000
B57561G1103+002
B57561G1103+005
B57561G1103+007
B57561G1303+005
B57561G1303+007
B57561G1104+000
B57561G1104+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
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
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 15
Temperature measurement
Glass-encapsulated sensors with insulation
B57561G, B57561G1
G561/G1561
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
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 4 of 15
Temperature measurement
Glass-encapsulated sensors with insulation
B57561G, B57561G1
G561/G1561
R/T No.
T (°C)
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
265.0
270.0
275.0
280.0
285.0
290.0
295.0
300.0
7002
7003
8304
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)
0.014679
2.2
0.021665
2.0
0.012967
2.3
0.013149
2.2
0.019613
2.0
0.011566
2.3
0.011806
0.010623
0.0095804
0.0086582
0.0078408
0.0071148
0.0064685
0.005892
0.0053767
0.0049152
0.0045011
0.0041287
0.0037934
0.0034908
0.0032173
0.0029697
0.0027451
0.0025412
0.0023556
0.0021865
0.0020323
0.0018913
0.0017623
0.0016441
0.0015357
0.001436
0.0013444
2.1
2.1
2.0
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
1.6
1.5
1.5
1.5
1.5
1.4
1.4
1.4
1.4
1.3
1.3
0.017793
0.016176
0.014735
0.013448
0.012297
0.011265
0.010338
0.009504
0.0087516
0.0080718
0.0074567
0.0068989
0.0063925
0.0059318
0.005512
0.005129
0.004779
0.0044586
0.004165
0.0038955
0.0036478
0.0034199
0.0032098
0.003016
0.002837
0.0026714
0.002518
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
1.5
1.4
1.4
1.4
1.4
1.3
1.3
1.3
1.3
1.2
1.2
1.2
1.2
0.010341
0.0092664
0.0083224
0.0074907
0.0067564
0.0061064
0.0055299
0.0050175
0.0045611
0.0041537
0.0037895
0.0034631
0.0031701
0.0029067
0.0026693
0.0024551
0.0022615
0.0020862
0.0019273
0.0017829
0.0016516
0.0015319
0.0014228
0.0013231
0.0012319
0.0011483
0.0010716
2.2
2.2
2.1
2.1
2.0
2.0
2.0
1.9
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
1.5
1.4
1.4
1.4
1.4
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 15
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