NTC thermistors for
inrush current limiting
Leaded and coated disks
Series/Type: B57238S0***M0**
Date: July 2019
TDK Electronics AG 2019. Reproduction, publication and dissemination of this publication, enclosures hereto
and the information contained therein without TDK Electronics' prior express consent is prohibited.Inrush current limiters B57238S0***M0**
ICLs S238
Applications Dimensional drawing
Inrush current limiting, e.g. in switch-mode power
supplies, soft-start motors
Features
Leaded and coated NTC thermistors
Tinned copper wire, kinked
Coating material flame retardant to UL 94 V-0
Component marking includes the manufacturer's
logo, resistance value and date code
Highly stable electrical characteristics
Approvals
UL 1434 (file number E69802)
IEC (certificate number 101QA12)
VDE (certificate number 40038223)
Dimensions in mm
CQC (0900104539)
Approx. weight 3 g
Options
Resistance tolerance <20% and alternative lead
configurations available on request
Delivery mode
Bulk (standard), cardboard tape on reel or Ammo pack
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 21
Important notes at the end of this document.