metal clad resistors

The IRN(N=narrow and flat) & IRF(F=flat) models are metal-clad, wire-wound, high-power, extremely lowinductance resistors designed for industrial and other applications where space is at a premium andperformance is a must. The ULN and ULF are UL approved versions of these models. Our extruded aluminumhousing provides rugged and strong protection. The flat design allows excellent heat dissipation. These modelsare available with flying leads or tab terminals. The most common applications for these models aremotor drives, braking and snubber applications and power sources for industrial equipment.GENERAL SPECIFICATIONSModel Wattage Rating on Heat Sink Resistance Range [ohms] Tolerances IRN50/ULN50C 50W 1-420 +-0.5(D)+-1.0(F)+-2.0(G)+-5.0(J)+-10(K) IRN100/ULN100C 100W 1-1.1K IRN150/ULN150C 150W 1-1.75K IRF100/ULF100C 100W 1-1.1K IRF150/ULF150C 150W 1-1.75K IRF200/ULF200C 200W 1-2.2K IRF250/ULF250C 250W 1-2.79K IRF300/ULF300C 300W 1-3.5K IRF400 400W 1-4.45K ULF400C 400W 1-3.08K IRF500 500W 1-5.78K ULF500C 500W 1-2.46K CHARACTERISTICS1/Temperature Range Cement: -55C to +200C, Silicone: -55-150C 2/Insulation Resistance 20Mohms minimum 3/Dielectric Strength IRN/IRF AC1500V, 2500V, 3000V, 4500V; Max. leakage current: 2mA ULN/ULF See Note 2 4/Temp. Coefficient +-260ppm/C maximum 5/Short Time Overload +-[1%+0.05 ohms] 5 X Power Rating-5sec. 6/Moisture Resistance +-[2%+0.05 ohms] 40C, 95% RH, DC100V case to terminal (500hrs.) 7/Thermal Shock +-[1%+0.05 ohms] Power rating 30min., -25C, 15minutes 8/Vibration +-[1%+0.05 ohms] 10Hz-55Hz-10Hz (1min.), 2hrs. each direction 9/Moisture Load Life +-[2%+0.05 ohms] 40C,95% RH, 0.1 X Power rating, 1.5h. on, 30min. off, 500 hours 10/Load Life +-[5%+0.05 ohms] Power rating, 1.5h. on, 30min. off, 500 hours Note1:ULN/ULF dielectric strength options of 1500V, 3500V, 4500V are also available.Optional dielectric strength must be higher than standard (calculated by formula)Note2:Less than 50V: 500V 1 min.50-600V: [1000V+(voltage rating X 2) 1 min.601-1500V: [2000V+(voltage rating X 2.25) 1 min.SURFACE TEMPERATURE INCREASE VERSUS POWER LOAD(Heatsink size 400X400X3mm) DIMENSIONSModel Dimensions [mm] Weight [g] L1+-1 L2+-0.3 W1+-0.3 W2+-0.3 IRN50/ULN50 70 50 60 50 100 IRN100/ULN100 120 100 60 50 160 IRN150/ULN150 170 150 60 50 220 IRF100/ULF100 90 70 80 70 155 IRF150/ULF150 120 100 80 70 200 IRF200/ULF200 150 130 80 70 245 IRF250/ULF250 180 160 80 70 290 IRF300/ULF300 210 190 80 70 335 IRF400/ULF400 270 250 80 70 430 IRF500/ULF500 330 310 80 70 525 FLYING LEADSModel 2mm2 1.25mm2 UL 3512 AWG 16 IRN/F 50-150 - 1ohm - IRF200 1-4ohm 4.1ohm - IRF250 1-5ohm 5.1ohm - IRF300 1-6ohm 6.1ohm - IRF400 1-8ohm 8.1ohm - IRF500 1-10ohm 10.1ohm - ULN/F 50-500 - - 1ohm DERATING CURVE1 IRF,IRN,ULF,ULN100-500 on heat sink; IRN,ULN50 free air2 IRF,IRN,ULF,ULN100 in free air3 IRF,IRN,ULF,ULN150 in free air4 IRF,IRN,ULF,ULN200 in free air5 IRF,IRN,ULF,ULN250-300 in free air6 IRF,IRN,ULF,ULN400 in free air7 IRF,IRN,ULF,ULN500 in free airHeat Sink Size:IRF,IRN,ULF,ULN100-200: 200X200X3mmIRF,ULF250-400: 400X400X3mmIRF,ULF500: 600X600X3mmORDERING PROCEDURE EXAMPLE