20W TO-126 HIGH POWER RESISTORS Features…………………………………………………………. Non-Inductive, Small, 20 Watt high power resistor. TO-126 style package offering a very low thermal resistance of 5.9 C°/W. Complete thermal flow design available for easy implementation. Superior vibration durability. Small thin package for high density PCB installation. RoHS compliant. Applications……………………………………………………… High frequency emitter resistors in switching power supplies. High precision CRT color video amplifiers. High frequency snubber and pulse handling circuits. VHF amplifiers. Pulse generator load resistors. Specification Structure and Material Dimensions 8.5 dia.3.1 12.0 3.1 MHP20S 100F Epoxy Molding Copper Wire Leads Conductor Resistor Film Alumina Copper Plate 15.2 3.8 15.0 1.9 0.5 0.6 5.08 12.0 1.4 (mm) Items Specification Power Rating Conditions 20 Watts @ Tab Temp < 25°C Power Rating 1 Watts Free air. Thermal Resistance 5.9°C/W From hot spot to tab. Resistance Range 0.01-0.09 Ω 0.1-9.1 Ω 10-220 Ω Extended resistance range to 51KΩ avail. Nominal Resistance Series E6 250 ppm/°C E12 100 ppm/°C E24 50 ppm/°C Additional 2.0Ω and 5.0 Ω also avail. +/- 5% and 1% +/- 1% TCR Tolerance Operation Temp. Range Dielectric Withstanding Voltage +/-5% For -55 to +155°C -55 to +155 °C 2000 Volts DC 60 seconds. between terminals and flange Load Life ∆R +/- (1.0 %+0.05 Ω) 25°C, 90 min. ON, 30 min.OFF, 1000 hours. Humidity ∆R +/- (1.0 %+0.05 Ω) 60°C, 90-95% RH, DC 0.1W, 1000 hours. Soldering Heat (Max) ∆R +/- (1.0 %+0.05 Ω) 250+/-5°C, 3 seconds, Min 95% coverage 230+/-5°C, 3 seconds. Solderability Insulation Resistance Vibration Over 1000 MΩ Between terminals and metal back plate. ∆R +/- (0.25 % Ω) Specifications subject to change without notice Notes: 1. Electrically isolated metal tab. 2. Recommend the use of thermal grease between metal tab and heat sink. 3. Thermal design should account for a thermal resistance between resistor and tab of 5.9°C/W and a maximum resistor temperature of 155°C. 4. Current rating: 25A maximum. 5. For the resistance range 220Ω to 51KΩ, the power rating is restricted to 10W. 1 MHP 20S 20W TO-126 HIGH POWER RESISTORS Derating Curve Rating Power (W), with 2.8°C/W heat sink. Flange Temperature Rise (°C) 140 MHP 20S 100 F 10 100 +25°C 8 MHP 20S 100 F 120 80 6 60 4 40 2 0 -50 20 +155°C 0 50 100 150 Flange Temperature (°C) 0 200 0 10 Power (W) Frequency Characteristics 20 One time rectangular impulse. Impedance (Ω) 1K Pulse Peak (Watts) 10K MHP 20S 1K0 F MHP 20S 100 F 100 MHP 20S 101 F 1K MHP 20S 500 F 10 100 MHP 20S 5R0 F 1 10 100K 1M 10M 100M 1G 10G 1µ Frequency(Hz) 10µ Ordering Information MHP 20S 500 F Model Resistance Code 0.1Ω : 0R100 50 Ω : 500 First two digits significant, last digit: number of trailing zeros 2 100µ 1m 10m Pulse Width (seconds) Tolerance J = 5% Tol F = 1% Tol 100m