Weight 2.50000 kg
Dimensions 100.00 x 50.00 x 330.00mm
Product Type

, ,

Series / Model

Power Rating

Minimum Resistance

Maximum Resistance


, ,

Temperature Coefficient

Insulation Resistance

20MΩ minimum

Inductive or Non Inductive


Termination / Connection


Temperature Range (°C)


  • Compliant

Series Products

Electronic Components

RARA IRM1600 Series Products
 Product nameDimensionsPower RatingMinimum ResistanceMaximum ResistanceToleranceTemperature CoefficientDatasheetAdd to enquiry
RARA IRM60059.00 x 61.00 x 235.00mm330W, 600W0.1Ω94Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM80059.00 x 61.00 x 285.00mm360W, 800W0.1Ω112Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM100059.00 x 61.00 x 335.00mm400W, 1kW0.1Ω150Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM120059.00 x 61.00 x 405.00mm480W, 1.2kW0.1Ω160Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM1600100.00 x 50.00 x 330.00mm570W0.3Ω88Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM2000100.00 x 50.00 x 400.00mm650W0.45Ω133Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM2400100.00 x 50.00 x 480.00mm720W0.6Ω144Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA IRM2800100.00 x 50.00 x 550.00mm750W0.7Ω135Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry

IRM Series Description

Introducing the IRM resistors, meticulously designed to meet the stringent demands of industrial applications. Housed in durable aluminum and engineered for efficient chassis mounting, the IRM series offers versatile power ratings ranging from 330W to 750W in free air and 600W to 1200W when heat sink mounted.

Engineers can leverage a broad resistance range from 0.1 to 160Ω (inductive) and 0.1 to 48Ω (non-inductive), coupled with tolerance options of ±1, ±2, ±5, and ±10 percent, providing a tailored solution for various applications. The maximum temperature coefficient of resistance (TCR) is capped at 260 ppm/°C, ensuring stability across a wide temperature range of -55℃ to +200℃.

IRM resistors find their niche in braking and snubber applications, motor drives, and power sources for industrial equipment, showcasing their adaptability in diverse engineering scenarios. Their robust design and high-performance characteristics make them a reliable choice for critical projects.

For those seeking UL-approved alternatives, the ULM series complements the IRM lineup. While maintaining the same high-performance standards, the ULM series holds UL approval, providing an additional layer of confidence for engineers prioritizing compliance with the highest safety standards in their industrial endeavors.

RARA IRM1600 Ordering Info

Below is the model number configuration for the IRM series from RARA.
Ordering example: IRM160050ΩF

Series/Model (IRMXXX)


Inductive/Non-Inductive (X)

(Blank)      Inductive
N      Non-Inductive

Resistance Value (XXXXΩ)

Resistance value expressed in ohms, for example 220.5Ω or 2Ω.

Tolerance (X)


Termination (FLXXX)

FL XXX      Flying Lead **
(Blank)  Tab Terminal

Termination (FLXXX)

FL XXX      Flying Lead **
(Blank)     Tab Terminal

* Defined by the resistance value chosen, see datasheet for full details
** Please include requested lead length with request, for example, FL300 for 300mm flying leads

IRM Downloads

Supporting Manufacturer Information

  • RARA