FPR 4-1414 • Extremly Low-Ohm • Highest Stability • Low Temperature Coefficient • Low Electrical Noise • Low Inductance • Customized Resistor Values SPECIFICATIONS ELECTRICAL Resistance Range : 0R01 ...1R Power Rating : 0.8 W without heatsink (70°C) 25 W with heatsink Thermal Resistance Rthj-c : < 4.2 K/W Tolerances : 0.1%, 0.25%, 0.5%, 1% Stability : 0.1%, 0.2%, 0.5% (depends on stress) Temperature Coefficient : ±10 ppm/K (20...40)°C ±15 ppm/K (20...60)°C ±50 ppm/K (-40...130)°C Insolation Resistance : 1.5 kVDC Max. Current : 20 A Thermal EMF : < 1 µV/K : -40°C...130°C : : : : CuNiMn-Foil Al2O3 (optional AlN) Plastic / Epoxy Cu-tinned / 4-pin ENVIRONMENTAL Operating Temperature Range MECHANICAL Resistor Material Substrate Housing Connector Material Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail [email protected] web www.willow.co.uk FPR 4-1414 TEMPERATURE COEFFICIENT 2000 + 15 ppm/K 1000 dR/R (ppm ) 0 -1000 - 15 ppm/K -2000 -3000 Limit 2 (3σ) -4000 -5000 Nom inal dR/R -6000 -7000 -40 Limit 1 (3σ) -20 0 20 40 100 80 60 120 140 Tem perature (°C) DERATING CURVE without heatsink 120 0,2% 80 Power ( % from nominal power) Pow er (% from nom inal pow er) with heatsink 0,5% 100 0,1% 60 40 20 100 0,5% 80 0,2% % 0,1% 60 40 20 0 0 25 40 55 70 85 100 115 130 25 50 85 100 115 Temperature of the backplate (°C) DIMENSIONS Am bient Tem perature (°C) Dimensionsin mm HOW TO ORDER FPR 4-1414 0R05 D 0.5% FPR 4-1414 0R01 D 0.1% Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail [email protected] web www.willow.co.uk 130