Temperature Measurement Probe Assemblies B57227 K 227 Applications ● Electric motors ● Transformers Features ● Coated thermistor disk with shrunk sleeve insulation ● PTFE-insulated wires, AWG 26 Options Alternative resistance ratings, rated temperatures, resistance tolerances and wire lengths available on request Dimensions in mm Approx. weight 5 g Climatic category (IEC 68-1) Max. power at 25 °C Resistance tolerance Rated temperature B value tolerance Dissipation factor (in air) Thermal cooling time constant (in air) Heat capacity Insulation resistance (V = 100 Vdc) Test voltage (t = 1 s) Type R100 R25 K 227/33 k/A1 Ω 1,8 k Ω 32,762 k 64 P25 ∆R/RN TN ∆B/B δth τc Cth Ris No. of R/T characteristic 2904 55/155/56 200 ± 10 % 100 ± 1,5 % approx. 5 approx. 30 approx. 150 > 100 2,5 mW °C mW/K s mJ/K MΩ kV B25/100 Ordering code K 4300 B57227-K333-A1 Siemens Matsushita Components B57227 K 227 Reliability data Remarks <2% No visible damage <1% No visible damage Standard Storage in dry heat IEC 60068-2-2 Storage in damp heat, steady state IEC 60068-2-3 Storage at upper category temperature T: 125 °C t: 1000 h Temperature of air: 40 °C Relative humidity of air: 93 % Duration: 56 days Rapid temperature cycling IEC 60068-2-14 Lower test temperature: – 55 °C Upper test temperature: 155 °C < 1 % Number of cycles: 10 No visible damage Endurance Pmax: 200 mW Duration: 1000 h <2% No visible damage Long-term stability (empirical value) Temperature: 155 °C Duration: 10 000 h <3% No visible damage Siemens Matsushita Components Test conditions ∆R25/R25 (typical) Test 65