NTC thermistors for temperature measurement Miniature sensors with bendable wires Series/Type: B57861S 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 B57861S Miniature sensors with bendable wires S861 Applications Temperature measurement Dimensional drawing Features Short response time High measuring accuracy Tight B value tolerances available Epoxy resin encapsulation PTFE-insulated leads of silver-plated nickel wire, AWG 30 UL approval (E69802) Options Alternative lead lengths on request Delivery mode Bulk Dimensions in mm Approx. weight 60 mg General technical data Climatic category Max.
Temperature measurement B57861S Miniature sensors with bendable wires S861 Electrical specification and ordering codes R25 Ω No. of R/T characteristic B25/100 K B value tolerance = 0.3%, resistance tolerance = ±1% 5k 8016 3988 ±0.3% 10 k 8016 3988 ±0.3% 30 k 8018 3964 ±0.3% B value tolerance = 1.
Temperature measurement B57861S Miniature sensors with bendable wires S861 R/T characteristics R/T No. T (°C) 1008 2014 2901 B25/100 = 3560 K B25/100 = 4540 K B25/100 = 3760 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 30.0 25.0 20.0 15.0 10.0 12.696 9.7251 7.5171 5.8353 4.5686 5.4 5.2 5.1 4.9 4.8 5.0 0.0 5.0 10.0 15.0 3.605 2.8665 2.2907 1.8438 1.492 20.0 25.0 30.0 35.0 40.0 7.8 7.6 7.3 7.1 6.
Temperature measurement B57861S Miniature sensors with bendable wires R/T No. T (°C) 160.0 165.0 S861 1008 2014 2901 B25/100 = 3560 K RT/R25 α (%/K) 0.02279 2.0 0.020667 2.0 B25/100 = 4540 K RT/R25 α (%/K) B25/100 = 3760 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 1.7 1.7 1.6 1.
Temperature measurement B57861S Miniature sensors with bendable wires S861 R/T characteristics R/T No. T (°C) 8016 8018 55.0 50.0 45.0 40.0 35.0 96.3 67.01 47.17 33.65 24.26 7.4 7.2 6.9 6.7 6.4 30.24 22.1 6.3 6.1 30.0 25.0 20.0 15.0 10.0 17.7 13.04 9.707 7.293 5.533 6.2 6.0 5.8 5.6 5.5 16.32 12.17 9.153 6.945 5.313 5.9 5.8 5.6 5.4 5.2 5.0 0.0 5.0 10.0 15.0 4.232 3.265 2.539 1.99 1.571 5.3 5.1 5.0 4.8 4.7 4.097 3.183 2.491 1.963 1.557 5.1 4.9 4.8 4.7 4.6 20.0 25.
Temperature measurement B57861S Miniature sensors with bendable wires Please read Cautions and warnings and Important notes at the end of this document.
Temperature measurement B57861S Miniature sensors with bendable wires S861 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 B57861S Miniature sensors with bendable wires S861 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 B57861S Miniature sensors with bendable wires S861 The components should be left in the original packing. Touching the metallization of unsoldered thermistors may change their soldering properties.
Temperature measurement B57861S Miniature sensors with bendable wires S861 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 B57861S Miniature sensors with bendable wires S861 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 B57861S Miniature sensors with bendable wires S861 Symbols and terms Symbol English German A AWG Area American Wire Gauge Fläche Amerikanische Norm für Drahtquerschnitte B B25/100 B value B value determined by resistance measurement at 25 °C and 100 °C B-Wert B-Wert, ermittelt durch Widerstandsmessungen bei 25 °C und 100 °C Cth Heat capacitance Wärmekapazität I Current Strom N Number (integer) Anzahl (ganzzahliger Wert) P25 Pdiss Pel Pmax Maximum power at 25 °C
Temperature measurement B57861S Miniature sensors with bendable wires S861 Symbol English German α Temperature coefficient Temperaturkoeffizient ∆ Tolerance, change Toleranz, Änderung δth Dissipation factor Wärmeleitwert τc τa Thermal cooling time constant Thermal time constant Thermische Abkühlzeitkonstante Thermische Zeitkonstante Abbreviations / Notes Symbol English German Surface-mounted devices Oberflächenmontierbares Bauelement * To be replaced by a number in ordering Platzhal
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.
