NTC thermistors for temperature measurement Leaded NTC thermistors, lead spacing 2.5 mm Series/Type: B57891M Date: February 2009 EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS prior express consent is prohibited.Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Applications Dimensional drawing Temperature measurement and compensation Features Wide resistance range Cost-effective Lacquer-coated thermistor disk Leads: copper-clad Fe wire, tinned Marked with resistance and tolerance Options Lead spacing 5 mm available on request Delivery mode Bulk (standard), cardboard tape, reeled or in Ammo pack on request Dimensions in mm Approx. weight 0.2 g General technical data Climatic category (IEC 60068-1) 40/125/56 Max. power (at 25 C) P 200 mW 25 Resistance tolerance R /R 5, 10 % R R Rated temperature T 25 C R Dissipation factor (in air) approx. 3.5 mW/K th Thermal cooling time constant (in air) approx. 12 s c Heat capacity C approx. 40 mJ/K th Please read Cautions and warnings and Page 2 of 23 Important notes at the end of this document.