B57237S0479M TDK

NTC thermistors for inrush current limiting Leaded and coated disks Series/Type: B57237 Date: March 2006 EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS prior express consent is prohibited.Inrush current limiters B57237 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 UL approval (E69802) Options Resistance tolerance <20% and alternative lead configurations available on request Dimensions in mm Delivery mode Approx. weight 2 g Bulk (standard), cardboard tape, reeled or in Ammo pack 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 B value tolerance B/B 3 % 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 I No. of B C C Param. Param. Ordering code 25 max 25/100 test test 1) 1) (0...25 C) R/T char- 230 V 110 V for R(I) for R(I) A acteristic K F F k n 1 9.0 1201 2700 700 2800 0.622 1.27 B57237S0109M000 2.2 7.0 1202 2800 700 2800 0.806 1.30 B57237S0229M000 2.5 6.5 1202 2800 700 2800 0.843 1.30 B57237S0259M000 4.7 5.1 1203 2900 700 2800 1.03 1.32 B57237S0479M000 5 5.0 1203 2900 700 2800 1.05 1.32 B57237S0509M000 7 4.2 1302 3000 700 2800 1.16 1.33 B57237S0709M000 10 3.7 1308 3060 700 2800 1.29 1.34 B57237S0100M000 3.0 1302 3000 700 2800 1.49 1.33 B57237S0150M000 15 22 2.8 1304 3300 700 2800 1.57 1.37 B57237S0220M000 33 2.5 1304 3300 900 3600 1.78 1.37 B57237S0330M000 1) For details on the capacitance C as well as on the parameters k and n refer toApplication Note, chapters 2.6 and 2.7. test Please read Important notes and Page 2 of 6 Cautions and warnings at the end of this document.