NTC thermistors for inrush current limiting Leaded and coated disks, insulation voltage 1000 VDC Series/Type: B57236 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 B57236 ICLs, insulation voltage 1000 VDC for 1 s S236 Applications Dimensional drawing Switch-mode power supplies Features Improved insulation voltage 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 Alternative lead configurations available on request Dimensions in mm Delivery mode Approx. weight 1.7 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 2.4 W max Resistance tolerance R /R 15 % R R Rated temperature T 25 C R B value tolerance B/B 3 % Dissipation factor (in air) approx. 14 mW/K th Thermal cooling time constant (in air) approx. 50 s c Heat capacity C approx. 700 mJ/K th Test voltage (t = 1 s) V 1000 VDC test 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) (0...65 C) R/T char- 230 V 110 V for R(I) for 1) A acteristic K F F k R(I) n 2.5 5.5 1201 2700 200 800 0.621 1.27 B57236S0259L002 5.0 1201 2700 300 0.80 1.31 B57236S0309L002 3 1200 5 4.5 1202 2800 300 1200 0.761 1.30 B57236S0509L002 8 3.7 1203 2900 300 1200 1.11 1.34 B57236S0809L002 10 3.5 1203 2900 300 1200 0.942 1.32 B57236S0100L002 12 3.2 1203 2900 300 1200 1.00 1.32 B57236S0120L002 2.9 1207 2965 300 1.08 1.33 B57236S0160L002 16 1200 20 2.8 1208 3065 300 1200 1.13 1.34 B57236S0200L002 25 2.5 1208 3065 300 1200 1.22 1.34 B57236S0250L002 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.