NTC thermistors for
inrush current limiting
Leaded and coated disks
Series/Type: B57238S0***M0**
Date: October 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.Inrush current limiters B57238S0***M0**
ICLs S238
Applications Dimensional drawing
Switch-mode power supplies
Soft-start motors, e.g. in vacuum cleaners
Features
Useable in series connections
up to 265 V
RMS
Coated thermistor disk for line applications
Kinked leads of tinned copper wire
Wide resistance range
Manufacturer's logo, NTC and resistance value
stamped on
UL approval (E69802)
Options
Resistance tolerance <20% and alternative lead
Dimensions in mm
configurations available on request
Approx. weight 3 g
Delivery mode
Bulk (standard) or with cardboard tape on 500-mm reel
General technical data
Climatic category (IEC 60068-1) 55/170/21
Max. power (at 25 C) P 3.9 W
max
Resistance tolerance R /R 20 %
R R
Rated temperature T 25 C
R
Dissipation factor (in air) approx. 20 mW/K
th
Thermal cooling time constant (in air) approx. 80 s
c
Heat capacity C approx. 1600 mJ/K
th
Please read Cautions and warnings and Page 2 of 20
Important notes at the end of this document.