POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD Lead Free CHASSIS MOUNTING NON-INDUCTIVE HIGH POWER RESISTORS RPG250, RPG300 Features and Applications Small size TO227, 200W high power resistor. Attaching an air-cooled heat sink or water-cooling is necessary. Rated power is 300W (one element) or 250W (two elements). M4 screw terminals, very low series inductance. Higher density packing, vibration-proof and perfect heat dissipation possible. Applications include snubber resistors for power supplies, gate resistors, pulse generators, high frequency amplifiers, dumping resistance of theater audio equipment of dividing network of loud speaker systems, etc. Dimensions Dimensions G Symbols A B C D E F G H F B H (mm) 38+/-0.5 25+/-0.5 15+/-0.5 30+/-0.2 15+/-0.5 13+/-0.5 2-3.2dia. 4-M4.0 Note C Schematics E D A RPG300 RPG250 Ordering Information P/N RPG250A10+10ohmJ RPG250A50+50ohmJ RPG300A50ohmJ RPG300A100ohmJ Type RPG250 RPG250 RPG300 RPG300 TCR A(100ppm/K) A(100ppm/K) A(100ppm/K) A(100ppm/K) Resistance 10+10ohm 50+50ohm 50ohm 100ohm Tolerance J(5%) J(5%) J(5%) J(5%) Note Two resistors Two resistors One resistor One resistor Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected] Lead Free POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD CHASSIS MOUNTING NON-INDUCTIVE HIGH POWER RESISTORS RPG-250, RPG-300 Specifications and Performances Specification Items RPG250 RPG300 Nominal Resistance 250 Watts 1ohm to 1Kohm Dual E24+ 300 Watts 1ohm to 1Kohm Single E24+ Additionally, 2.0 and 5.0. TCR +/-100 ppm/K(A) +/-100 ppm/K(A) For -55 to +120 C +/-5%(J) +/-5%(J) -55 - +120 C -55 - +120 C Rating Power Resistance Range Tolerance Operation Temp. Range Max. Applied Voltage Test Conditions At flange temperature -55 to +25 degree C E = P⋅ R Withstanding Voltage 2500 VAC 60 seconds. Load Life +/-(1.0 %+0.05 ohm) 25C, 90 min.ON, 30min.OFF, 1000hours. Humidity +/-(1.0 %+0.05 ohm) Temperature Cycle +/-(1.0 %+0.05 ohm) Short Time Overload +/-(0.25 %+0.05 ohm) 70C, 90 to 95%RH, DC0.1W, 1000hours. -55C, 30 min.,+155C30min., 20cycles. (-55C, 30 min.,+120C, 30min., 20cycles. at RPG300) Rating watt×2.5, 2.5seconds, with heat sink. Soldering Heat +/-(0.25 %+0.05 ohm) 350 C +/-5 C, 3seconds, Solderability Soldering is not available Insulation Resistance - Over 1000 Mohm Vibration Between terminals and flange. +/-(0.25 %+0.05 ohm) Derating Curve, RPG250, RPG300 Temperature Rise, RPG300 0.1K/W heat sink ％Rating Power 160 140 Degree C 120 100 100 80 Resistor temperature 80 60 +25C +120C 60 40 40 20 Flange temperature 20 0 -50 0 0 +50 +100 +150 +200 0 100 200 Applied Power 300 (W) フランジ温度 Flange Temperature （℃） R ( C) Materials Flange: Ni plated copper plate. Substrate: Al2O3 alumina substrate. Resistor: Metal film resistor. Case: Polycarbonate plastics. Terminals: Ni plated copper alloy Screw: 4-M4/10mm. 20050212 Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]