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 Temperature measurement and compensation Dimensional drawing 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.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Electrical specification and ordering codes R25 Ω 1k 1.5 k 2.2 k 3.3 k 4.7 k 6.8 k 10 k 15 k 22 k 33 k 47 k 68 k 100 k 150 k 220 k 330 k 470 k No.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 R/T characteristics R/T No. T (°C) 1008 1009 1013 B25/100 = 3560 K B25/100 = 3930 K B25/100 = 3900 K RT/R25 α (%/K) RT/R25 α (%/K) RT/R25 α (%/K) 55.0 50.0 45.0 40.0 35.0 53.104 39.318 29.325 22.03 16.666 6.1 6.0 5.8 5.7 5.5 85.423 60.781 43.65 31.629 23.118 7.0 6.8 6.6 6.4 6.2 77.285 54.938 39.507 28.722 21.099 7.0 6.7 6.5 6.3 6.1 30.0 25.0 20.0 15.0 10.0 12.696 9.7251 7.5171 5.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 R/T No. T (°C) 160.0 165.0 1008 1009 1013 B25/100 = 3560 K RT/R25 α (%/K) 0.02279 2.0 0.020667 2.0 B25/100 = 3930 K RT/R25 α (%/K) B25/100 = 3900 K RT/R25 α (%/K) 170.0 175.0 180.0 185.0 190.0 0.01878 0.01709 0.015582 0.014227 0.013012 1.9 1.9 1.8 1.8 1.8 195.0 200.0 205.0 210.0 215.0 0.011934 0.010964 0.0101 0.0093191 0.0085949 1.7 1.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 R/T characteristics R/T No. T (°C) 2003 2004 2005 B25/100 = 3980 K B25/100 = 4100 K B25/100 = 4600 K RT/R25 α (%/K) RT/R25 α (%/K) RT/R25 α (%/K) 55.0 50.0 45.0 40.0 35.0 97.578 67.65 47.538 33.831 24.359 7.5 7.2 7.0 6.7 6.5 99.552 68.582 47.963 34.019 24.448 7.6 7.3 7.0 6.7 6.5 30.0 25.0 20.0 15.0 10.0 17.753 13.067 9.7228 7.3006 5.5361 6.3 6.0 5.8 5.6 5.5 17.787 13.083 9.7251 7.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 R/T characteristics R/T No. T (°C) 55.0 50.0 45.0 40.0 35.0 2006 2007 2904 B25/100 = 5000 K B25/100 = 4830 K B25/100 = 4300 K RT/R25 α (%/K) RT/R25 α (%/K) RT/R25 α (%/K) 200.55 131.02 87.171 58.988 40.545 8.7 8.3 8.0 7.7 7.4 185.87 123.23 82.888 56.544 39.061 8.4 8.1 7.8 7.6 7.3 121.46 84.439 59.243 41.938 29.947 7.4 7.2 7.1 6.9 6.7 30.0 25.0 20.0 15.0 10.0 28.272 19.997 14.292 10.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 R/T characteristics R/T No. T (°C) 55.0 50.0 45.0 40.0 35.0 4003 4012 4901 B25/100 = 4450 K B25/100 = 4355 K B25/100 = 3950 K RT/R25 α (%/K) RT/R25 α (%/K) RT/R25 α (%/K) 103.81 73.707 52.723 37.988 27.565 6.8 6.7 6.6 6.5 6.4 115.76 80.102 56.067 39.677 28.374 7.5 7.2 7.0 6.8 6.6 87.89 61.759 43.934 31.618 23.006 7.1 6.9 6.7 6.5 6.3 30.0 25.0 20.0 15.0 10.0 20.142 14.801 10.976 8.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Taping and packing 1 Taping of radial leaded NTC thermistors Dimensions and tolerances Lead spacing F = 2.5 mm and 5.0 mm (taping to IEC 60286-2) Dimensions (mm) b s d P0 P1 F ∆h ∆p W W0 W1 W2 H H0 H1 D0 t L L1 Lead spacing 2.5 mm 11.0 5.0 0.5/0.6 12.7 5.1 2.5 0 0 18.0 5.5 9.0 3.0 18.0 16.0 32.2 4.0 0.9 11.0 4.0 Lead spacing 5 mm 11.5 6.0 0.5/0.6 12.7 3.85 5.0 0 0 18.0 5.5 9.0 3.0 18.0 16.0 32.2 4.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Types of packing Ammo packing Ammo type x y z I 80 240 210 Packing unit: 1000 - 2000 pcs./reel Reel packing Packing unit: 1000 - 2000 pcs./reel Reel dimensions (in mm) Reel type d f n w I 360 max. 31 ±1 approx. 45 54 max. II 500 max. 23 ±1 approx. 59 72 max. Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Cassette packing Packing unit: 1000 - 2000 pcs./cassette Bulk packing The components are packed in cardboard boxes, the size of which depends on the order quantity. Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Mounting instructions 1 Soldering 1.1 Leaded NTC thermistors Leaded thermistors comply with the solderability requirements specified by CECC. When soldering, care must be taken that the NTC thermistors are not damaged by excessive heat. The following maximum temperatures, maximum time spans and minimum distances have to be observed: Dip soldering Iron soldering Bath temperature max. 260 °C max.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Bending strength: Test Ub: Two 90°-bends in opposite directions at a weight of 0.25 kg. Torsional strength: Test Uc: severity 2 The lead is bent by 90° at a distance of 6 to 6.5 mm from the thermistor body. The bending radius of the leads should be approx. 0.75 mm. Two torsions of 180° each (severity 2).
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 The components should be left in the original packing. Touching the metallization of unsoldered thermistors may change their soldering properties.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Cautions and warnings General See "Important notes" at the end of this document. Storage Store thermistors only in original packaging. Do not open the package prior to storage. Storage conditions in original packaging: storage temperature 25 °C ... +45 °C, relative humidity ≤75% annual mean, <95% maximum 30 days per annum, dew precipitation is inadmissible.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.5 mm M891 Mounting Ensure that no thermo-mechanical stress occurs due to production processes (curing or overmolding processes) when thermistors are sealed, potted or overmolded or during their subsequent operation. The maximum temperature of the thermistor must not be exceeded. Ensure that the materials used (sealing/potting compound and plastic material) are chemically neutral.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.
Temperature measurement and compensation B57891M Leaded NTC thermistors, lead spacing 2.
Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned.
