FNR4-T227

FPR FNR 2-T227 4-T227 Foil Power Resistors • • • • • Resistances from 0.001Ohm to 100Ohms Power Rating to 80Watt Resistance Tolerances to ±0.1% TCR to ±15ppm/K Load Stability to 0.1% SPECIFICATIONS Type Terminals Resistance Range Power Rating (with heatsink) Thermal Resistance Rthj-c Tolerances Stability Temperature Coefficient FPR 2-T227 2 0.01 to 100 Ohms 60W FPR 4-T227 4 (kelvin connection) 0.001 to 100 Ohms FNR 2-T227 2 0.01 to 100 Ohms 80W FNR 4-T227 4 (kelvin connection) 0.001 to 100 Ohms 1.3 K/W 0.1% / 1% / 2% / 5% (others upon request) 0.1% / 0.2% / 0.5% (depends on stress) 1.0 K/W ±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) 2.5 kV DC < 1 µV/K 50A (higher upon request) -40°C to 130°C Metalfoil CuNiMn (DIN 17471) Al2O3 Epoxy Cu / tinned or nickel plated backplate: 1.5Nm terminals: 1.3 Nm AlN Voltage Proof Thermal EMF Max. Current Operating Temperature Resistor Material Substrate Housing Connector Material Max. Torque Ordering Information Part Number - Resistance - Tolerance FPR 2-T227 1.1 Ohms 1% Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 www.riedon.com (626) 284-9901 (626) 284-1704 Page 43 rev. 03/2006A FPR FNR 2-T227 4-T227 Foil Power Resistors SPECIFICATIONS (continued) Temperature Coefficient 4000 250 2000 +15ppm/K table A 200 0 -15ppm/K Limit 2 (3σ) Nominal ∆R/R Limit 1 (3σ) -2000 -4000 TCR - Shift (ppm/K) ∆R/R (ppm) 150 100 -6000 50 -8000 -40 -20 0 20 40 60 80 100 120 140 0 2 Temperature (°C) Resistance Value (mOhm) 5 10 20 50 100 200 Derating and Stability Power Rating Notes - 120 100 Power ( % from nominal power) 0.5% 0.2% 0.1% The FPR/FNR Series Foil Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130°C for a 0.5% stability part. To specify an appropriate heatsink use the following formula : 80 60 40 20 0 25 RθH = TMAX - ( P x RθR ) - TA P 50 85 100 115 130 Where: RθH = Thermal Resistance of Heatsink ( K/W ) RθR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) Tem perature of the backplate (°C) Dimensions and Attachment Variations Dimension A B C D E F G H I J K L M N mm 26 38 12.7 4 30 15 4.1 10 8 4 2 0.8 M4 10 11.9 0.2 0.2 tol. (±mm) 0.5 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 inches 1.02 1.50 0.50 0.16 1.18 0.59 0.16 0.39 0.31 0.16 0.08 0.03 M4 0.39 0.47 0.008 0.008 tol. (±inches) 0.020 0.020 0.008 0.008 0.008 0.008 0.008 0.008 0.008 0.008 0.008 0.004 FPR/FNR 2-T227 Riedon Inc. FPR/FNR 4-T227 Alhambra CA 91801 www.riedon.com O 300 Cypress Avenue (626) 284-9901 (626) 284-1704 Page 44 rev. 03/2006A