NTC thermistors for
temperature measurement
Probe assemblies
Series/Type:
B57045
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
Temperature compensation (chassis
mounting)
Temperature measurement (chassis
mounting)
Temperature control (chassis mounting)
Features
Cost-effective
Good thermal coupling through screw-type
case (thread M3)
Electrically isolated aluminum case
Tinned copper leads
Options
Tighter resistance tolerance available on
request
Delivery mode
Bulk
Dimensional drawing
Dimensions in mm
Approx. weight 1 g
General technical data
Climatic category
(IEC 60068-1)
55/125/56
Max. power
(at 25
C)
P
25
450
mW
Resistance tolerance
R
R
/R
R
10
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
approx. 9
mW/K
Dissipation factor
(on chassis)
th
approx. 20
mW/K
Thermal cooling time constant
(in air)
c
approx. 75
s
Thermal cooling time constant
(on chassis)
c
approx. 15
s
Torque
approx. 0.5
Nm
Insulation resistance
(V = 100 VDC)
R
ins
>100
M
Test voltage
(t = 1 s)
V
test
2500
VAC
Electrical specification and ordering codes
R
25
No. of R/T
characteristic
B
25/100
K
Ordering code
1 k
1011
3730
3%
B57045K0102K000
2.2 k
1013
3900
3%
B57045K0222K000
4.7 k
4001
3950
3%
B57045K0472K000
6.8 k
2903
4200
3%
B57045K0682K000
Temperature measurement
B57045
Probe assemblies
K45
Page 2 of 16
Please read Important notes and
Cautions and warnings at the end of this document.
R
25
No. of R/T
characteristic
B
25/100
K
Ordering code
10 k
2904
4300
3%
B57045K0103K000
33 k
1012
4300
3%
B57045K0333K000
47 k
4003
4450
3%
B57045K0473K000
68 k
2005
4600
3%
B57045K0683K000
100 k
2005
4600
3%
B57045K0104K000
150 k
2005
4600
3%
B57045K0154K000
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: 125
C
t: 1000 h
< 3%
No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-78
Temperature of air: 40
C
Relative humidity of air: 93%
Duration: 56 days
< 3%
No visible
damage
Endurance
P
max
: 450 mW
t: 1000 h
< 3%
No visible
damage
Long-term stability
(empirical value)
Temperature: 100
C
t: 10000 h
< 5%
No visible
damage
Temperature measurement
B57045
Probe assemblies
K45
Page 3 of 16
Please read Important notes and
Cautions and warnings at the end of this document.