RARA IRF250 Series

RARA IRF250 Series

The IRF250 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 250W on a heat sink and available resistance values between 1Ω and 2.79kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF250 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).

  • Flat space saving metal clad wire wound resistor
  • Cement (standard) or silicone filling material with an extruded aluminium housing
  • 300mm flying leads 
  • Resistance ranges available between 1Ω and 2.79kΩ
  • TCR of +260 ppm/°C maximum
  • Tolerance values available of ±0.5%, ±1.0%, ±2.0%, ±5.0% and ±10.0%
  • Power rating of 250W (on a heat sink)
  • Insulation resistance of 20MΩ minimum
  • Temperature range between -55°C and +200°C (cement) or -55°C and +150°C (silicone)
  • Short time overload of 5 x power rating for 5 seconds

Typical applications for the IRF series include:

  • Motor drives
  • Braking and snubbing applications
  • Power sources for industrial equipment

The below table gives the specifications available for the IRF series including the IRF250 resistors:

RARA IRF250 Specifications
Specifications
Additional Features
  • Flat type metal clad wire wound resistor
  • Cement or silicone filling material with an extruded aluminium housing
  • 300mm flying leads
  • Excellent heat dissipation
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C (cement) or -55°C up to +150°C (silicone)
  • Short time overload of 5 x power rating is 5 seconds
Maximum Power Rating 250W (on a heat sink)
Maximum Resistance 2.79kΩ
Minimum Resistance
TCR ±260ppm/°C maximum
Tolerance
  • ±0.5% (D)
  • ±1.0% (F)
  • ±2.0% (G)
  • ±5.0% (J)
  • ±10.0% (K)

We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:

 

 

DOCUMENTATION
PDF Document RARA IRN, ULN, IRF and ULF series flat space saving metal clad wire wound resistor datasheet

 

 

 

This product is available fully compliant to the RoHS EU directive 2011/65/EU.

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  • Product Code: RARA IRF250 Series
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Tags: RARA IRF250, IRF, IRF250, IRF250C, IRF250S