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:

*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