The RHF thin film series is a surface mount type resistor and is housed in the widely used standard TO-263 semiconductor package. This TO package is small in size making this series a great choice for your compact PCB installations.
Resistances are available from 0.01 to 51 Ohms. Additionally, this series features a power rating of 35 Watts, with a TCR (temperature coefficient of resistance) as low as ±50 ppm/°C.
These pulse withstanding resistors have a load stability to ±1% and can be easily attached with solder reflow technology. Our RHF power thin film resistors exhibit high power capabilities making them an excellent choice for RF power, switching power supplies and controllers.
Resistor Power Thin Film Product Image

KEY FEATURES:

  • Resistances from 0.01 Ohm to 51K Ohms
  • Low Stability to ± 1%
  • Resistance Tolerances to ± 1%
  • TCR to ± 50ppm/ºC
  • Power Rating to 35 Watt
  • Solder Reflow Secure at 260ºC / 20s
  • TO-263 Housing (D-Pak)
  • Isolated Back Plate

APPLICATIONS:

  • Power Inverters
  • Braking Systems
  • Lighting (LED)
  • Power Supplies

Product Range Summary:

POWER RATING 1
(with heatsink)
INDUCTANCE TEMPERATURE COEFFICIENT TOLERANCE RANGE 2 RESISTANCE RANGE (Ω) OPERATING TEMPERATURE RANGE
35 W
8.4 nH
  • ± 250 ppm/°C
  • ± 100 ppm/°C
  • ± 50 ppm/°C
  • 5%
  • 1% / 5%
  • 1%
  • 0.01 to 0.099 Ω
  • 0.1 to 9.9 Ω
  • 10 to 51 Ω
-55°C to +155°C

1 2W on simple solder pad
2 Consult factory for other tolerances not listed

Mechanical Characteristics

Resistor Power Thin Film Dimensions
Units Dimensions
A B C D E F G H J K L
mm10.3 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 0.05 0.5 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

Specifications

Specifications Values
Resistor MaterialThin Film
Terminals 2
Power Rating (with heatsink) 35 W ( 2W on Simple Solder Pad )
Inductance8.4 nH
Temperature Coefficient±250 ppm/°C±100 ppm/°C±50 ppm/°C
Tolerances (contact factory for other values)5%1% / 5%1%
Resistance Range0.01 to 0.099Ω0.1 to 9.9Ω10 to 51KΩ
Operating Temperature-55°C to 155°C
Thermal Resistance Rthj-c3.3 K/W
Max Operating Voltage500V
Voltage Proof2.0kV DC
Insulation ResistanceOver 1,000 MΩ
Load Life±1%90 min ON, 30 min OFF, 1000 hrs @ 25°C
Humidity±1%90-95% RH, 0.1W, 1000 hrs @ 40°C
Temperature Cycle±0.25%-55°C for 30 min, +155°C for 30 min, 5 cycles
Solder Heat±0.1%350°C ±5C for 3 seconds
Vibration±0.25%IEC60068-2-6

* Moisture Sensitivity Level: MSL-1

POWER RATING NOTES:

  • RHF Resistors must be attached to a suitable heatsink.
  • The maximum internal resistor temperature is 155°C.
  • Use the following formula to specify appropriate heatsink:
    Resistor Power Thin Film Heatsink Equation
Description of equations of Thin film Resistor
Power Derating Curve of Thin film Resistor
Pulse Peak power of  RHF Resistor

How to Order

Resistor Power Thin Film Part Number Breakdown

Example P/N: RHFH4Q038K0FE is Resistor Power Thin, 35W, ±50ppm/ºC, 38.0KΩ, ±1.0%, embossed tape & reel
*For Tin/Lead coated leads, add “-Pb” to part numbers