NTC thermistors for
inrush current limiting
Leaded and coated disks, P11 series
Series/Type: B57211P0***M3*1
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 B57211P0***M3*1
ICLs P11
Applications Dimensional drawing
For peripheral communication equipment, e.g. in
swich-mode power supplies
Features
Black coated thermistor disk
Coating material flame retardant to UL 94 V-0
Kinked leads of tinned copper wire
Lead spacing 7.5 mm
Manufacturer's logo, NTC and resistance value
stamped on
High stability of electrical characteristic
UL approval (E69802)
Options
Resistance tolerance <20% and alternative lead
configurations available on request
Dimensions in mm
Delivery mode
Approx. weight 1.2 g
Bulk (standard) or with cardboard tape on 500-mm reel
General technical data
Climatic category (IEC 60068-1) 40/170/21
Max. power (at 25 C) P 3.0 W
max
Resistance tolerance R /R 20 %
R R
Rated temperature T 25 C
R
Dissipation factor (in air) approx. 13 mW/K
th
Thermal cooling time constant (in air) approx. 70 s
c
Heat capacity C approx. 910 mJ/K
th
Please read Cautions and warnings and Page 2 of 20
Important notes at the end of this document.