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.