RARA RH 25C Series

RARA RH 25C Series

The RH 25C metal clad wire wound resistor series from RARA offers a power rating of up to 20W on a heat sink (8W in free air) with available resistance values between 0.27Ω and 25kΩ (inductive design) or between 0.1Ω and 10kΩ (non-inductive design). These high power resistors are available with tolerances of ±0.1%, ±0.25%, ±0.5% and ±1.0% depending the the resistance value required, as well as the option of inductive or non-inductive resistive windings. The RH 25C series from RARA has a cement moulding within an aluminium housing which mounts on to a chassis to utilise the heat sink effect, all with a temperature range from -55°C up to +250°C 

  • Metal clad wire wound resistor
  • Inductive resistance range available between 0.27Ω and 25kΩ
  • Non-inductive resistance range available between 0.1Ω and 10kΩ
  • TCR from as low as ±40 ppm/°C between 20Ω and 25kΩ (inductive) or between 20Ω and 10kΩ (non-inductive)
  • Tolerance from as low as ±0.1% from 1Ω up to 25kΩ (inductive) or from 1Ω up to 20kΩ (non-inductive)
  • Power rating of 20W on a heat sink (8W in free air)
  • Insulation resistance of 20MΩ minimum
  • Temperature range between -55°C and +250°C
  • High stability at conventional power ratings
  • Short time overload of 5 x power rating for 5 seconds

The below table gives the specifications available for the RH series including the RH 25C resistors:

RARA RH 25C Specifications

*30W on heat sink (178x127x51x1mm), 50W on heat sink (305x305x2mm)

*Option of ±20 ppm/°C is available upon request, please contact us for further details

Specifications
Additional Features
  • Metal clad wire wound resistor
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +250°C
  • Cement moulding within aluminium housing
  • Short time overload of 5 x power rating is 5 seconds
  • High stability at conventional power ratings
  • Mounts on chassis to utilise heat sink effect
Maximum Power Rating On heat sink
  • 20W
In free air
  • 8W
Maximum Resistance Inductive
  • 25kΩ
Non-inductive
  • 10kΩ
Minimum Resistance Inductive
  • 0.27Ω
Non-inductive
  • 0.1Ω
TCR

20Ω to 25kΩ (inductive)

  • ±40ppm/°C

20Ω to 10kΩ (non-inductive)

  • ±40ppm/°C

 1Ω to 19.6Ω

  • ±50ppm/°C 

0.1Ω to 0.976Ω

  • ±100ppm/°C 


Tolerance 0.1Ω to 0.2Ω
  • ±1% (F)
0.2Ω to 0.4Ω
  • ±0.5% (D)
  • ±1% (F)
0.4Ω to 1Ω
  • ±0.25% (C)
  • ±0.5% (D)
  • ±1% (F)
1Ω to 10kΩ (non-inductive) or 25kΩ (inductive)
  • ±0.1% (B)
  • ±0.25% (C)
  • ±0.5% (D)
  • ±1% (F)

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 RH and FRH series metal clad wire wound resistor datasheet

 

 

 

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

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Tags: RARA RH 25C, RH 25C, RARA RH25C, RH25C