B57238S250M TDK

NTC thermistors for inrush current limiting Leaded and coated disks Series/Type: B57238S0***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 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) Dimensions in mm Approx. weight 3 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 3.9 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 Electrical specification and ordering codes 1) 1) R R I C C min Ordering code 25 max test test ( I , 25 C) (0...65 C) 230 V AC 110 V AC max A F F 2.5 8.4 700 2800 0.054 B57238S0259M0** 3 7.4 700 2800 0.068 B57238S0309M0** 4.7 6.6 700 2800 0.090 B57238S0479M0** 5 6.4 700 2800 0.097 B57238S0509M0** 7 6.0 700 2800 0.113 B57238S0709M0** 8 5.5 700 2800 0.131 B57238S0809M0** ** = 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.