NTC thermistors for
temperature measurement
Probe assemblies
Series/Type: B57504K
Date: 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 B57504K
Probe assemblies K504
Applications Dimensional drawing
Temperature measurement in household
appliances (e.g. dryers, dish washers, small
appliances)
Features
NTC thermistor potted in a medium-resistant
stainless steel case
Short thermal response time in water
Wire heat-resistant up to 125 C
(XLPE-insulated wire)
Options
Alternative casing, cable lengths, cable
material (PTFE), R/T characteristics and
connectors available on request.
Dimensions in mm
Delivery mode
Approx. weight 2.3 g
Bulk
General technical data
Climatic category (IEC 60068-1) 20/125/42
Upper category temperature (wire) 125 C
Maximum operating temperature (sensor head) T 150 C
op,max
Resistance tolerance R /R 2 %
R R
Rated temperature T 70 C
R
Dissipation factor (in air) approx. 2 mW/K
th
Thermal time constant (in water) < 2 s
a
Insulation resistance (V = 500 V DC) R > 100 M
ins
Test voltage (t = 1 s) V 1250 V AC
test
Electrical specification and ordering codes
R R No. of R/T B Ordering code
70 25 25/100
characteristic K
2055 10000 7003 3625 0.8% B57504K0103A009
Please read Cautions and warnings and Page 2 of 9
Important notes at the end of this document.