BHPR500500J

250W / 300W TO-227 HIGH POWER RESISTORS Features…………………………………………………………. Non-Inductive, Rated up to 300W depending on resistor configuration. Small TO-227 style package, with very low thermal resistance. Superior vibration durability, with M4 screw terminals. RoHS compliant. Applications……………………………………………………… High power snubber resistors in power supplies. High frequency and pulse handling circuits. Pulse generator load resistors. High power crossover circuits in audio speaker systems Specification Dimensions H G E D A Dimensions Symbols A B C D E F G 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 C F B Schematics BHPR300 　　 BHPR250 Specifications subject to change without notice 1 BHPR 250W / 300W HIGH POWER RESISTORS Specification Items Power Rating Resistance Range Nominal Resistance Series TCR Tolerance Operation Temp. Range Max. Applied Voltage Dielectric Withstanding Voltage Load Life Humidity Temperature Cycle Short Time Overload Insulation Resistance Vibration BPHR 250 250 Watts 1Ω to 1KΩ Dual E24 +/-100 ppm/°C +/-5%(J) -55 - +120 °C √(P.R) 2500V BPHR300 300 Watts 1Ω to 1KΩ Single E24 +/-100 ppm/°C +/-5%(J) -55 - +120 °C Test Conditions At flange temperature -55 to +25°C 2.0 Ω and 5.0 Ω also available. From -55 to +120 °C 60 seconds. 25°C, 90 min.ON, 30min.OFF, 1000hours. 70°C, 90 to 95%RH, DC0.1W, 1000hours. -55°C, 30 min.,+155°C 30 min., 20 cycles.　 55°C, 30 min.,+120C, 30 min., 20 cycles. (Rated Power×2.5) for 2.5seconds with heat sink. Between terminals and flange. ∆R+/-(1.0 %+0.05 Ω) ∆R +/-(1.0 %+0.05 Ω) ∆R +/-(1.0 %+0.05 Ω) ∆R +/-(0.25 %+0.05 Ω) Over 1000 MΩ ∆R +/-(0.25 %+0.05 Ω) Note: BHPR 250 has two resistors of equal values. (e.g. BHPR250 500 F, has two 50Ω resistors. See schematic). Current rating: 100A Maximum. Derating Curve, BHPR 250, BHPR 300 Power Rating％ Temperature Rise, BHPR 300 Temp. Rise (°C) 100 80 60 40 20 0 -50 0 +50 +100 +150 +200 Flange Temperature　（℃） +25°C +120°C 160 140 120 100 80 60 40 20 0 Resistor temperature Flange temperature 100 200 Applied Power (W) 300 Using 0.1°C/W heat sink Materials Flange: Ni plated copper plate. Substrate: alumina substrate. Resistor: Metal film resistor. Case: Polycarbonate plastics. Terminals: Ni plated copper alloy to suit screw: 4-M4/10mm. Ordering Information BHPR Model Power Rating 250 : 250W 300 ; 300W 250 500 J Tolerance J = 5% Tol Resistance Code 500 : 50Ω (First two digits significant, last digit: number of trailing zeros) 2