NTC thermistors for
temperature measurement
Probe assemblies
Series/Type:
Date:
B57703M
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
Probe assemblies
B57703M
M703
Applications
Surface temperature measurement,
e.g. on housings and heat sinks
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, lead
lengths and AWG 26 or AWG 28 stranded
wires 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
Test voltage
(IEC 60068-1)
(at 25
°C)
Dimensional drawing
Dimensions in mm
Approx. weight 0.8 g
(in air)
(in air)
(t = 1 s)
P
25
∆R
R
/R
R
T
R
δ
th1)
τ
c1)
C
th1)
V
test
55/125/56
150
±2
25
approx. 3
approx. 50
approx. 150
1000
mW
%
°C
mW/K
s
mJ/K
V AC
Electrical specification and ordering codes
R
25
Ω
5k
10 k
30 k
No. of R/T
characteristic
8016
8016
8018
B
25/100
K
3988
±1%
3988
±1%
3964
±1%
Ordering code
B57703M0502G040
B57703M0103G040
B57703M0303G040
1) Depends on mounting situation.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 10
Temperature measurement
Probe assemblies
B57703M
M703
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
∆R
25
/R
25
(typical)
< 1%
Remarks
No visible
damage
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Long-term stability
(empirical value)
Storage at upper
category temperature
T: 125
°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: 55
°C
60068-2-14 Upper test temperature: 125
°C
Number of cycles: 10
P
max
: 150 mW
t: 1000 h
Temperature: 70
°C
t: 10000 h
< 1%
No visible
damage
No visible
damage
No visible
damage
No visible
damage
< 0.5%
< 1%
< 2%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 10
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