NTC thermistors for
temperature measurement
Probe assemblies
Series/Type:
Date:
B57276K
March 2013
© 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
Probe assemblies
B57276K
K276
Applications
Washing machines
Dish washers
Tumble-dryers
Water boilers
Features
Suitable for use in corrosive environments
Compact stainless steel case
RAST 2.5 or RAST 5 connector
Cost-effective ready-to-use sensor
UL approval (E69802)
VDE approval (DIN EN 60539-1: 2002)
Options
Alternative resistance ratings, rated temperatures and resistance tolerances
available on request.
RAST 5 plug terminals or RAST 2.5 connector with bar available on request.
Type Z276, Z277 and Z278 with different geometry and faster response time available on
request.
Delivery mode
Bulk
Dimensional drawings
Dimensions
R
60
Ω
A max. Plug terminal
mm
mm
-
-
6.3 x 0.8
4.8 x 0.8
RAST 2.5 connector
1204
∅
14.5
3243
∅
12.4
RAST 5 connector
1082
∅
14.5
3243
∅
12.4
Approx. weight 9 g
Approx. weight 9 g
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 10
Temperature measurement
Probe assemblies
B57276K
K276
General technical data
Climatic category
Max. power
Resistance tolerance
Dissipation factor
Thermal time constant
Heat capacity
Insulation resistance
Test voltage
(IEC 60068-1)
(at 25
°C)
(in water)
(in water)
(V = 100 V DC)
(t = 1 s)
10/100/56
500
±2
approx. 20
approx. 20
approx. 500
> 1000
3750
P
25
∆R
R
/R
R
δ
th
τ
a
C
th
R
ins
V
test
mW
%
mW/K
s
mJ/K
MΩ
V AC
Electrical specification and ordering codes
T
R
°C
R
R
Ω
R
25
Ω
4829
11981
4829
11981
No. of R/T
B
25/100
characteristic K
2003
2901
2003
2901
3980
±1%
3760
±1.5%
3980
±1.5%
3760
±1.5%
Ordering code
RAST 2.5 connector
60
1204
60
3243
RAST 5 connector
63
1082
60
3243
B57276K0482A007
B57276K0123A028
B57276K0482A009
B57276K0123A024
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 10
Temperature measurement
Probe assemblies
B57276K
K276
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
∆R
25
/R
25
(typical)
< 2%
Remarks
No visible
damage
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Long-term stability
(empirical value)
Robustness of
terminations
Storage at upper
category temperature
T: 100
°C
t: 1000 h
IEC
Temperature of air: 40
°C
60068-2-78 Relative humidity of air: 93%
Duration: 56 days
IEC
Lower test temperature: 10
°C
60068-2-14 Upper test temperature: 100
°C
Number of cycles: 10
P
max
: 500 mW
t: 1000 h
Temperature: 100
°C
t: 10000 h
DIN
Pull-out force
46 249
(both connectors together)
F = 50 N
< 1%
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
< 1%
< 2%
< 3%
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 10
Temperature measurement
Probe assemblies
B57276K
K276
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
2003
2901
B
25/100
= 3980 K
B
25/100
= 3760 K
R
T
/R
25
α
(%/K) R
T
/R
25
α
(%/K)
97.578
67.65
47.538
33.831
24.359
17.753
13.067
9.7228
7.3006
5.5361
4.2332
3.266
2.5392
1.9902
1.5709
1.2492
1.0000
0.80575
0.65326
0.5329
0.43715
0.36064
0.29908
0.24932
0.20886
0.17578
0.14863
0.12621
0.10763
0.092159
0.079225
0.068356
0.059247
0.051531
0.044921
0.039282
0.034387
0.030186
0.02665
0.023594
0.020931
0.018616
0.016612
7.5
7.2
7.0
6.7
6.5
6.3
6.0
5.8
5.6
5.5
5.3
5.1
5.0
4.8
4.7
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
3.1
3.1
3.0
2.9
2.8
2.8
2.7
2.7
2.6
2.5
2.5
2.4
2.4
2.3
2.3
63.969
46.179
33.738
24.927
18.611
14.033
10.679
8.198
6.3123
4.9014
3.821
3.0027
2.3801
1.9
1.5257
1.233
1.0000
0.81679
0.67166
0.55527
0.46095
0.38459
0.32184
0.27068
0.22907
0.19468
0.16607
0.14221
0.12218
0.10533
0.09123
0.079284
0.069062
0.06034
0.052886
0.046482
0.040985
0.036233
0.032101
0.02851
0.025373
0.022633
0.020231
6.7
6.4
6.2
6.0
5.8
5.6
5.4
5.3
5.2
5.1
4.9
4.7
4.6
4.5
4.3
4.3
4.1
4.0
3.9
3.8
3.8
3.7
3.6
3.5
3.3
3.2
3.1
3.1
3.0
2.9
2.8
2.8
2.7
2.7
2.6
2.5
2.5
2.5
2.4
2.4
2.3
2.3
2.3
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 10
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