FHR 4-2820H Special Resistors • • • • • • Resistances from 0.001Ohm to 0.01Ohms Power Rating to 10Watt Resistance Tolerances to ±1% TCR to ±30ppm/K Load Stability to 0.5% Customized Resistance Values SPECIFICATIONS Type FHR 4-2820H Resistance Range 0.001 to 0.01 Ohms Other values upon request Power rating free air 70°C with heatsink 3W 10 W Tolerances 1% / 5% Other tolerances upon request Thermal Resistance 8.0 K/W Stability 0.5% Temerature Coefficient ±30ppm/K (20 to 60°C) Insolation Resistance 50 VDC max. Current 100 A Thermal EMF < 0.1µV/K Operating Temperature Range -40 to 130°C Resistor Material CuNiMn-Foil Substrate anodized aluminium Connector Material Cu / tinned Terminals 4 Ordering Information Part Number - Resistance - Tolerance FHR 4-2820H 0.01 Ohms 1% Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom. http://www.willow.co.uk + 44 (0) 1342 835234 + 44 (0) 1342 834306 [email protected] rev. 03/2006A FHR 4-2820H Special Resistors SPECIFICATIONS (continued) Temperature Coefficient 4000 ∆R/R (ppm) 2000 +15ppm/K 0 -15ppm/K -2000 Limit 2 (3σ) -4000 Nominal ∆R/R -6000 -8000 Limit 1 (3σ) -40 -20 0 20 40 60 80 100 120 140 Temperature (°C) Derating 120 Power (% from nominal power) Power (% from nominal power) without heatsink 100 80 60 40 20 with heatsink 120 100 0 80 60 40 20 0 25 50 70 85 100 115 130 25 50 85 100 115 130 Temperature of the backplate (°C) Ambient Temperature (°C) Dimensions Dimension mm tol. (±mm) inches tol. (±inches) A 8.50 0.2 0.33 0.008 B 25.75 0.2 1.01 0.008 C 2.00 0.2 0.08 0.008 D 5.08 0.1 0.20 0.004 E 0.80 0.1 0.03 0.004 F 3.00 0.1 0.12 0.004 G 1.30 0.1 0.05 0.004 H 5.08 0.1 0.20 0.004 I 2.60 0.1 0.10 0.004 J 3.00 0.1 0.12 0.004 K 1.90 0.1 0.07 0.004 L 5.08 0.1 0.20 0.004 M 3.60 0.1 0.14 0.004 N 20.00 0.2 0.79 0.008 O 18.84 0.2 0.74 0.008 P 27.50 0.2 1.08 0.008 Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom. http://www.willow.co.uk + 44 (0) 1342 835234 + 44 (0) 1342 834306 [email protected] rev. 03/2006A