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FPR2-T227 Datasheet(PDF) 2 Page - Riedon Powertron |
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FPR2-T227 Datasheet(HTML) 2 Page - Riedon Powertron |
2 / 2 page Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 FPR FNR 2-T227 4-T227 Foil Power Resistors Temperature Coefficient Derating and Stability Dimensions and Attachment Variations Power Rating Notes - The FPR/FNR Series Foil Resistors must be attached to a suit- able heatsink. The maximum internal resistor temperature is 130°C for a 0.5% stability part. To specify an appropriate heatsink use the following formula : R θH = TMAX - ( P x RθR ) - TA P Where: R θH = Thermal Resistance of Heatsink ( K/W ) R θR = Thermal Resistance of Resistor ( K/W ) T MAX = Maximum Temperature of Resistor T A = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) SPECIFICATIONS (continued) FPR/FNR 2-T227 FPR/FNR 4-T227 Dimension mm tol. (±mm) inches tol. (±inches) A 26 0.5 1.02 0.020 B 38 0.5 1.50 0.020 C 12.7 0.2 0.50 0.008 D 4 0.2 0.16 0.008 E 30 0.2 1.18 0.008 F 15 0.2 0.59 0.008 G 4.1 0.2 0.16 0.008 H 10 0.2 0.39 0.008 I 8 0.2 0.31 0.008 J 4 0.2 0.16 0.008 K 2 0.2 0.08 0.008 L 0.8 0.1 0.03 0.004 M M4 M4 N 10 0.2 0.39 0.008 O 11.9 0.2 0.47 0.008 0 20 40 60 80 100 120 25 50 85 100 115 130 Temperature of the backplate (°C) 0.1% 0.2% 0.5% -15ppm/°C +15ppm/°C Nominal ∆R/R Limit 2 (3σ) Limit 1 (3σ) Temperature (°C) 4000 2000 0 -2000 -4000 -6000 -8000 -20 0 -40 80 140 120 100 60 20 40 100 Resistance Value (mOhm) 5 150 10 200 20 50 2 200 0 250 50 100 table A |
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