Temperature Measurement SMDs B57620 C 620 Applications ● ● ● ● ● ● ● Temperature compensation Hybrid circuits Data systems Telecom systems Automotive electronics Crystal oscillators LC displays Features ● ● ● ● ● ● Termination Small dimensions, EIA size 0805 Silver palladium terminations Cost-effective Suitable for automatic placement Suitable for wave and reflow soldering Available on tape (PU: 4000 pcs) Dimensions in mm Approx. weight 13 mg Options Alternative resistance ratings and resistance tolerance < 5% available on request Climatic category (IEC 68-1) Max. power at 25 °C (on PCB) Resistance tolerance Rated temperature B value tolerance Dissipation factor (on PCB) Thermal cooling time constant (on PCB) Heat capacity Type R25 C 620/220/+ C 620/330/+ C 620/470/+ C 620/680/+ C 620/1 k/+ C 620/2,2 k/+ C 620/4,7 k/+ Ω 220 330 470 680 1k 2,2 k 4,7 k P25 ∆R/RN TN ∆B/B δth1) τc1) Cth1) No. of R/T characteristic 3207 3204 3204 3206 3206 1304 1010 55/125/21 210 ± 5 %, ± 10 %, ± 20 % 25 ±3% approx. 3,5 approx. 10 approx. 35 mW °C mW/K s mJ/K B25/100 Ordering code K 3100 3250 3250 3450 3450 3300 3530 B57620-C221-+962 B57620-C331-+962 B57620-C471-+962 B57620-C681-+962 B57620-C102-+962 B57620-C222-+62 B57620-C472-+962 +: J for ∆R/RN = ± 5 % K for ∆R/RN = ± 10 % M for ∆R/RN = ± 20 % 1) Depends on mounting situation Siemens Matsushita Components 41 B57620 C 620 Type R25 C 620/10 k/+ C 620/22 k/+ C 620/47 k/+ C 620/100 k/+ C 620/220 k/+ Ω 10 k 22 k 47 k 100 k 220 k No. of R/T characteristic 1011 2003 2101 2903 2904 B25/100 Ordering code K 3730 3980 4100 4200 4300 B57620-C103-+62 B57620-C223-+62 B57620-C473-+62 B57620-C104-+162 B57620-C224-+62 +: J for ∆R/RN = ± 5 % K for ∆R/RN = ± 10 % M for ∆R/RN = ± 20 % Reliability data Tested on standardized PCB in accordance with IEC 60068-2-21 Test Standard Test conditions ∆R25/R25 (typical) Storage in dry heat IEC 60068-2-2 Storage at upper category temperature T: 125 °C t: 1000 h < 3 %/ < 6 % 1) Storage in damp heat, steady state IEC 60068-2-3 Temperature of air: 40 °C Relative humidity of air: 93 % Duration: 21 days <3% Rapid temperature cycling IEC 60068-2-14 Lower test temperature: – 55 °C Upper test temperature: 125 °C < 3 % Number of cycles: 10 Pmax: 210 mW Duration: 1000 h Endurance Solderability Robustness of terminations IEC 60068-2-58 No visible damage <5% Solderability: 215 °C/4 s 235 °C/2 s Resistance to soldering heat: 260 °C/10 s Bending of carrier (2 mm bending) Refer also to page 120 Remarks <5% 95 % of terminations wetted <5% No visible damage 1) The higher value applies to 220 Ω–1 kΩ types. 42 Siemens Matsushita Components