SF-2 Surface Mount, Precision Metal Film Resistor RIEDON Resistances from 50W to 3MW Resistance Tolerance to ±0.1% Low Temperature Coefficient to ±5ppm/°C Very Low Inductance Excellent Long Term Stability Riedon's surface mount, metal film resistors are designed for demanding applications where emphasis is placed on minimum tolerances, lowest possible temperature coefficients, and exceptional long-term stability. SPECIFICATIONS Power Rating Resistance Tolerances Temperature Coefficients Elemement Voltage Insulation Voltage Insulation Resistance Temperature Range - 50W to 3MW 1W ( Tambient= 70°C ) Power Derating Curve ± 0.1%, 0.25%, 0.5%, 1% Power Level % Resistance Range - ( See Chart ) 300V Max. >750 V 1010W (Min.) -25°C to 125°C ( TC >= 25ppm/°C ) 120 100 80 60 40 20 0 0 25 -10°C to 85°C ( TC <= 15ppm/°C ) Voltage Coefficient - 50 75 100 125 150 175 Ambient Temperature °C 0.5 x 10-6 / V ( Max. ) 0.070 ±0.015 0.260 ±0.015 Ø0.120 ±0.015 0.125 ±0.015 0.34 ±0.02 0.11 ±0.02 0.155 ±0.015 0.10 ±0.02 0.070 ±0.020 Solder Pad Dimensions TCR ( ±ppm/°C ) Ordering information: Part Number - Resistance - Tolerance - TCR Example: SF-2 - 200K Ohm - 0.1% - 5ppm Riedon Inc. REV 2/03 300 Cypress Avenue Resistances Available at these Tolerances ±0.05% ±0.10% ±0.25% ±0.50% 50 - 250K 10 - 250K 10 50 - 510K 10 - 510K 15 50 - 510K 10 - 1 M 25 50 - 510K 10 - 1 M 10 - 1.5 M 5-2M 5-2M 50 50 - 510K 5-1M 3 - 1.5 M 2-2M 1-3M Alhambra CA 91801 www.riedon.com 10 - 250K ±1% 5 10 - 250K - 10 - 510K 10 - 510K - 10 - 1.5 M 10 - 1.5 M 10 - 1.5 M (626) 284-9901 Fax: (626) 284-1704