NTC thermistors for
inrush current limiting
Leaded and coated disks
Series/Type: B57237S0***M0**
Date: May 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 B57237S0***M0**
ICLs S237
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
Kinked leads of tinned copper wire
Wide resistance range
Manufacturer's logo, NTC and resistance value
stamped on
Dimensions in mm
UL approval (E69802)
Approx. weight 2 g
Options
Resistance tolerance <20% and alternative lead
configurations available on request
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 3.1 W
max
Resistance tolerance R /R 20 %
R R
Rated temperature T 25 C
R
Dissipation factor (in air) approx. 17 mW/K
th
Thermal cooling time constant (in air) approx. 90 s
c
Heat capacity C approx. 1530 mJ/K
th
Electrical specification and ordering codes
1) 1)
R
R I C C min Ordering code
25 max test test
(@ I , 25 C)
(0...25 C) 230 V AC 110 V AC max
A F F
1 9.0 700 2800 0.038 B57237S0109M0**
2.2 7.0 700 2800 0.064 B57237S0229M0**
2.5 6.5 700 2800 0.074 B57237S0259M0**
4.7 5.1 700 2800 0.120 B57237S0479M0**
5 5.0 700 2800 0.125 B57237S0509M0**
7 4.2 700 2800 0.172 B57237S0709M0**
** = Delivery mode
00 = Bulk
51 = Reel packing
1) For details on the capacitance C please refer toApplication note, chapter 1.6.
test
Please read Cautions and warnings and Page 2 of 20
Important notes at the end of this document.