NTC thermistors for
temperature measurement
Probe assemblies
Series/Type: B57227K
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 B57227K
Probe assemblies K227
Applications Dimensional drawing
Electric motors
Transformers
Features
Coated thermistor disk with shrunk sleeve
insulation
PTFE-insulated wires, AWG 26
UL approval (E69802)
Options
Alternative resistance ratings, rated
temperatures, resistance tolerances and wire
lengths available on request.
Delivery mode
Dimensions in mm
Bulk
Approx. weight 5 g
General technical data
Climatic category (IEC 60068-1) 55/155/56
Max. power (at 25 C) P 200 mW
25
Resistance tolerance R /R 10 %
R R
Rated temperature T 100 C
R
Dissipation factor (in air) approx. 5 mW/K
th
Thermal cooling time constant (in air) approx. 30 s
c
Heat capacity C approx. 150 mJ/K
th
Insulation resistance (V = 100 V DC) R > 100 M
ins
Test voltage (t = 1 s) V 2.5 kV AC
test
Electrical specification and ordering codes
R R No. of R/T B Ordering code
100 25 25/100
characteristic K
1.8 k 32762 2904 4300 3% B57227K0333A001
Please read Cautions and warnings and Page 2 of 9
Important notes at the end of this document.