FPR2-T227 RIEDON | Alldatasheet
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Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 43 rev. 03/2006A SPECIFICATIONS Resistances from 0.001Ohm to 100Ohms Power Rating to 80Watt Resistance Tolerances to ±0.1% TCR to ±15ppm/K Load Stability to 0.1% Foil Power Resistors Type FPR 2-T227 FPR 4-T227 FNR 2-T227 FNR 4-T227 Terminals 2 4 (kelvin connection) 2 4 (kelvin connection) Resistance Range 0.01 to 100 Ohms 0.001 to 100 Ohms 0.01 to 100 Ohms 0.001 to 100 Ohms Power Rating (with heatsink) 60W 80W Thermal Resistance Rthj-c 1.3 K/W 1.0 K/W Tolerances 0.1% / 1% / 2% / 5% (others upon request) Stability 0.1% / 0.2% / 0.5% (depends on stress) Temperature Coefficient ±15 ppm/K (20 to 60°C) from R < 0.02 Ohms ±20 ppm/K (20 to 60°C) FPR 2-T227 / FNR 2-T227 TK Shift depends from resistance value (see graph next page) Voltage Proof 2.5 kV DC Thermal EMF < 1 µV/K Max. Current 50A (higher upon request) Operating Temperature -40°C to 130°C Resistor Material Metalfoil CuNiMn (DIN 17471) Substrate Al2O3 AlN Housing Epoxy Connector Material Cu / tinned or nickel plated Max. Torque backplate: 1.5Nm terminals: 1.3 Nm Part Number - Resistance - Tolerance FPR 2-T227 1.1 Ohms 1%
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Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 44 rev. 03/2006A 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 : RθH = 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 0.008 100 120 25 50 85 100 115 130 Temperature of the backplate (°C) Power ( % from nominal power) 0.1% 0.2% 0.5% -15ppm/K +15ppm/K Nominal ∆R/R Limit 2 (3σ) Limit 1 (3σ) Temperature (°C) ∆R/R (ppm) 4000 2000 -2000 -4000 -6000 -8000 -20 0-40 80 1401201006020 40 100 Resistance Value (mOhm) 150 200 2 2000 250 50 100 TCR - Shift (ppm/K) table A