B57238

NTC thermistors for inrush current limiting Leaded and coated disks www.DataSheet4U.com Series/Type: Date: B57238 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 ICLs B57238 S238 Applications Switch-mode power supplies Soft-start motors, e.g. in vacuum cleaners Features Useable in series connections up to 265 Vrms Coated thermistor disk for line applications Kinked leads of tinned copper wire Wide resistance range UL approval (E69802) Options Resistance tolerance <20% and alternative lead configurations available on request Delivery mode Bulk (standard), cardboard tape, reeled or in Ammo pack General technical data Climatic category Max. power Resistance tolerance Rated temperature B value tolerance Dissipation factor Thermal cooling time constant Heat capacity (IEC 60068-1) (at 25 °C) Dimensional drawing Dimensions in mm Approx. weight 3 g (in air) (in air) Pmax ∆RR/RR TR ∆B/B δth τc Cth 55/170/21 3.9 ±20 25 ±3 approx. 20 approx. 80 approx. 1600 W % °C % mW/K s mJ/K Electrical specification and ordering codes R25 Imax (0...65 °C) Ω A 2.5 8.4 3 7.4 4.7 6.6 5 6.4 7 6.0 8 5.5 10 5.0 15 4.4 16 4.0 No. of R/T characteristic 1202 1203 1207 1207 1207 1208 1208 1209 1209 B25/100 K 2800 2900 2965 2965 2965 3065 3065 3165 3165 Ctest1) 230 V µF 700 700 700 700 700 700 700 700 700 Ctest1) 110 V µF 2...