IRM series

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
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 94Ω
  • Power rating of up to 600W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM Series
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 112Ω
  • Power rating of up to 800W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 150Ω
  • Power rating of up to 1000W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 160Ω
  • Power rating of up to 1200W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.3Ω up to 88Ω
  • Power rating of up to 570W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.45Ω up to 133Ω
  • Power rating of up to 650W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.6Ω up to 144Ω
  • Power rating of up to 720W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
  • RARA
  • Metal clad wire wound resistor
  • Resistance options from 0.7Ω up to 135Ω
  • Power rating of up to 750W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM
Please be advised that due to the ongoing supply issues with raw materials affecting the global electronics industry, as well as an increase in orders received by our manufacturing partners, a large number of products are facing increased lead times in recent months. For the latest lead time and stock availability, please contact one of our engineers who will be happy to discuss lead times further and the potential for alternative parts.