r se Is Tro Prewo Th In f Iml fhr s re Ise k ye Ferutae S Resistances from 0.01 Ohm to 51K Ohms Low Stability to 1% Resistance Tolerances to 1% TCR to 50ppm/C Power Rating to 35 Watt Solder Reflow Secure at 260C / 20s TO-263 Housing (D-Pak) Isolated Back Plate a noitacilpp S Power Inverters Lighting (LED) Braking Systems Power Supplies p tcudor r egna Syrammu OPERTING 1 RESISTANCE POWER RATING TEMPERATURE TOLERANCE TEMPERATURE 2 (with heatsink) RANGE () COEFFICIENT RANGE RANGE 0.01 to 0.099 250 ppm/C 5% 35 W 0.1 to 9.9 100 ppm/C 1% / 5% -55C to+155C 10 to 51K 50 ppm/C 1% 1 2W on simple solder pad 2 Consult factory for other tolerances not listed Hwo t o o redr RHF H4 Q 038K0 F E RESISTOR PACKAGE CODE TEMPERATURE RESISTANCE TOLERANCE PACKING POWER THIN FILM WATTS COEFFICIENT OF RESISTANCE (TCR) RHF H4, 35W, TO-263 Q = 50 ppm/C F = 1.0% E = Embossed Tape & Reel 0R038 = 0.038 N = 100 ppm/C J = 5.0% 003K8 = 3.8K K = 250 ppm/C 038K0 = 38.0K For Tin/Lead coated leads, add -Pb to part numbers. Standard Termination Finish: Matte Tin (Sn) Example P/N: RHFH4Q038K0FE is Resistor Power Thin, 35W, 50ppm/C, 38.0K, 1.0%, embossed tape & reel 59 www.johansondielectrics.comr se Is Tro Prewo Th In f Iml fhr s re Ise m ce Hlacina c Hiretcara Scit S Dimensions Units A B C D E F G H J K L mm 10.3 10.1 15.3 5.08 1.5 0.75 2.2 4.5 0.5 2.5 5.0 tol. ( mm) 0.2 0.2 1.0 0.1 0.05 0.05 0.2 0.2 0.05 0.5 1.0 inches 0.405 0.400 4.54 0.200 0.060 0.030 0.087 0.177 0.020 0.10 0.20 tol. ( inches) 0.008 0.008 0.04 0.004 0.002 0.002 0.008 0.008 0.002 0.02 0.04 Sicep Fnoitaci S Specifications Values Resistor Material Thin Film Terminals 2 Power Rating (with heatsink) 35 W ( 2W on Simple Solder Pad ) Inductance 8.4 nH Resistance Range 0.01 to 0.099 0.1 to 9.9 10 to 51K Temperature Coefficient 250 ppm/C 100 ppm/C 50 ppm/C Tolerances (contact factory for other values) 5% 1% / 5% 1% Operating Temperature -55C to 155C Thermal Resistance Rthj-c 3.3 K/W Max Operating Voltage 500V Voltage Proof 2.0kV DC Insulation Resistance Over 1,000 M Load Life 1% 90 min ON, 30 min OFF, 1000 hrs 25C Humidity 1% 90-95% RH, 0.1W, 1000 hrs 40C Temperature Cycle 0.25% -55C for 30 min, +155C for 30 min, 5 cycles Solder Heat 0.1% 350C 5C for 3 seconds Vibration 0.25% IEC60068-2-6 Reflow soldering Lead-free soldering 260C / 20s Moisture Sensitivity Level: MSL-1 60 www.johansondielectrics.com