B57514K0493A001

NTC thermistors for temperature measurement Probe assemblies Series/Type: B57514K Date: January 2018 © EPCOS AG 2018. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. EPCOS AG is a TDK Group Company. Temperature measurement B57514K Probe assemblies K514 Dimensional drawing Applications Temperature measurement in household appliances (e.g. dryers, cookers, small appliances) Features NTC thermistor assembled in a stainless steel case with cable outlet Temperature range 20 to 200 °C Wire heat-resistant up to 200 °C (PTFE-insulated wire in fiberglass sleeve) Fast and simple flange installation Options Alternative casing, cable lengths, R/T characteristics, connectors available on request. Delivery mode Bulk Dimensions in mm Approx. weight 4.5 g General technical data Climatic category Resistance tolerance Rated temperature Dissipation factor Thermal time constant Insulation resistance Test voltage (IEC 60068-1) (in air) (in water) (V = 500 V DC) (t = 1 s) ∆RR/RR TR δth τa Rins Vtest 20/200/42 ±2.5 100 approx. 3 approx. 3 > 100 1250 % °C mW/K s MΩ V AC Electrical specification and ordering codes R100 Ω 3300 R25 Ω 48538 Please read Cautions and warnings and Important notes at the end of this document. No. of R/T characteristic 7002 Page 2 of 11 B25/100 K 3988 ±1% Ordering code B57514K0493A001 Temperature measurement B57514K Probe assemblies K514 Reliability data Test Standard Storage in dry heat IEC 60068-2-2 Storage in damp heat, steady state Rapid temperature cycling Voltage proof test Insulation test Test conditions ∆R25/R25 (typical) < 3% Storage at upper category temperature T: 200 °C t: 1000 h IEC Temperature of air: 85 °C < 3% 60068-2-67 Relative humidity of air: 85% Duration: 1000 h Lower test temperature: 20 °C < 3% Upper test temperature: 200 °C Number of cycles: 1000 Medium: air Applied voltage between metal housing and sensor wires: 1250 V AC/60 s The sensors are placed in a vessel containing metallic balls of 1 mm diameter (with total immersed head) at room temperature. The applied voltage is 500 V DC. Remarks No visible damage No visible damage No visible damage No flashover Above 100 MΩ Note Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be ensured that no water enters the NTC thermistors (e.g. through plug terminals). Avoid dewing and condensation unless thermistor is specified for these conditions. Please read Cautions and warnings and Important notes at the end of this document. Page 3 of 11 Temperature measurement B57514K Probe assemblies K514 R/T characteristics R/T No. 7002 T (°C) B25/100 = 3988 K T (°C) RT/R25 α (%/K) B25/100 = 3988 K T (°C) RT/R25 α (%/K) B25/100 = 3988 K RT/R25 α (%/K) 55.0 50.0 45.0 40.0 35.0 96.33 66.866 47.037 33.508 24.156 7.4 7.2 6.9 6.7 6.4 65.0 70.0 75.0 80.0 85.0 0.20872 0.17558 0.14837 0.12592 0.10731 3.5 3.4 3.3 3.2 3.2 185.0 190.0 195.0 200.0 205.0 0.0086582 0.0078408 0.0071148 0.0064685 0.005892 2.0 2.0 1.9 1.9 1.8 30.0 25.0 20.0 15.0 10.0 17.613 12.98 9.6643 7.2656 5.5129 6.2 6.0 5.8 5.6 5.4 90.0 95.0 100.0 105.0 110.0 0.091816 0.078862 0.067988 0.058824 0.051071 3.1 3.0 2.9 2.9 2.8 210.0 215.0 220.0 225.0 230.0 0.0053767 0.0049152 0.0045011 0.0041287 0.0037934 1.8 1.8 1.7 1.7 1.7 5.0 0.0 5.0 10.0 15.0 4.22 3.2575 2.5348 1.9876 1.5699 5.3 5.1 4.9 4.8 4.6 115.0 120.0 125.0 130.0 135.0 0.044489 0.03888 0.034084 0.02997 0.02643 2.7 2.7 2.6 2.5 2.5 235.0 240.0 245.0 250.0 255.0 0.0034908 0.0032173 0.0029697 0.0027451 0.0025412 1.6 1.6 1.6 1.6 1.5 20.0 25.0 30.0 35.0 40.0 1.2488 1.0000 0.80594 0.65355 0.53312 4.5 4.4 4.3 4.1 4.0 140.0 145.0 150.0 155.0 160.0 0.023373 0.020727 0.018429 0.016427 0.014679 2.4 2.4 2.3 2.3 2.2 260.0 265.0 270.0 275.0 280.0 0.0023556 0.0021865 0.0020323 0.0018913 0.0017623 1.5 1.5 1.5 1.4 1.4 45.0 50.0 55.0 60.0 0.43735 0.36074 0.29911 0.24925 3.9 3.8 3.7 3.6 165.0 170.0 175.0 180.0 0.013149 0.011806 0.010623 0.0095804 2.2 2.1 2.1 2.0 285.0 290.0 295.0 300.0 0.0016441 0.0015357 0.001436 0.0013444 1.4 1.4 1.3 1.3 Please read Cautions and warnings and Important notes at the end of this document. Page 4 of 11 Temperature measurement B57514K Probe assemblies K514 Cautions and warnings General See "Important notes" on page 2. Storage Store thermistors only in original packaging. Do not open the package prior to processing. Storage conditions in original packaging: storage temperature 25 °C ... +45 °C, relative humidity ≤75% annual mean,