NTC thermistors for
temperature measurement
Probe assemblies
Series/Type:
B57703
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.
1) Depends on mounting situation.
Applications
Surface temperature measurement,
e.g. on housings and pipes
Features
High accuracy
Easy mounting
Good thermal coupling through metal tag
Thermistor encapsulated in metal-tag case
PTFE-insulated leads of silver-plated
nickel wire, AWG 30
UL approval (E69802)
Options
Alternative resistance ratings,
rated temperatures, resistance tolerances
and lead lengths available on request
Delivery mode
Bulk
Dimensional drawing
Dimensions in mm
Approx. weight 0.8 g
General technical data
Climatic category
(IEC 60068-1)
55/125/56
Max. power
(at 25
C)
P
25
150
mW
Resistance tolerance
R
R
/R
R
2
%
Rated temperature
T
R
25
C
Dissipation factor
(in air)
th
1)
approx. 3
mW/K
Thermal cooling time constant
(in air)
c
1)
approx. 50
s
Heat capacity
C
th
1)
approx. 150
mJ/K
Test voltage
(t = 1 s)
V
test
1
kVAC
Electrical specification and ordering codes
R
25
No. of R/T
characteristic
B
25/100
K
Ordering code
5 k
8016
3988
1%
B57703M0502G040
10 k
8016
3988
1%
B57703M0103G040
30 k
8018
3964
1%
B57703M0303G040
Temperature measurement
B57703
Probe assemblies
M703
Page 2 of 9
Please read Important notes and
Cautions and warnings at the end of this document.
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
< 1%
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
< 1%
No visible
damage
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature:
55
C
Upper test temperature: 125
C
Number of cycles: 10
< 0.5%
No visible
damage
Endurance
P
max
: 150 mW
t: 1000 h
< 1%
No visible
damage
Long-term stability
(empirical value)
Temperature: 70
C
t: 10000 h
< 2%
No visible
damage
Temperature measurement
B57703
Probe assemblies
M703
Page 3 of 9
Please read Important notes and
Cautions and warnings at the end of this document.