Weight 4.30000 kg
Dimensions 100.00 x 50.00 x 550.00mm
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 ULM2800 Series Products
 Product nameDimensionsPower RatingMinimum ResistanceMaximum ResistanceToleranceTemperature CoefficientDatasheetAdd to enquiry
RARA ULM60059.00 x 61.00 x 235.00mm330W, 600W0.1Ω94Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM80059.00 x 61.00 x 285.00mm360W, 800W0.1Ω112Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM100059.00 x 61.00 x 335.00mm400W, 1kW0.1Ω140Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM120059.00 x 61.00 x 405.00mm480W, 1.2kW0.1Ω160Ω±1%, ±2%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM1600100.00 x 50.00 x 330.00mm570W0.3Ω88Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM2000100.00 x 50.00 x 400.00mm650W0.45Ω113Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM2400100.00 x 50.00 x 480.00mm720W0.6Ω144Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry
RARA ULM2800100.00 x 50.00 x 550.00mm750W0.7Ω135Ω±1%, ±5%, ±10%±260 ppm/°C Add to Enquiry

ULM Series Description

Introducing the ULM resistors, an exceptional solution meticulously designed for industrial applications with the added assurance of UL approval. Crafted with precision, the ULM series features metal-clad resistors housed in durable aluminum, engineered for efficient chassis mounting, and offering versatile power ratings from 330W to 750W in free air and 600W to 1200W when heat sink mounted.

Engineers benefit from a broad resistance range, spanning from 0.1 to 160Ω (inductive) and 0.1 to 48Ω (non-inductive). Tolerance options of ±1, ±2, ±5, and ±10 percent provide a customized solution for diverse applications. The maximum temperature coefficient of resistance (TCR) is capped at 260 ppm/°C, ensuring stability across a wide temperature range from -55℃ to +200℃.

The ULM resistors excel in braking and snubber applications, motor drives, and power sources for industrial equipment, showcasing unparalleled adaptability in diverse engineering scenarios. The added distinction of UL approval establishes the ULM series as a top-tier choice for engineers prioritizing compliance with the highest safety standards in their industrial projects.

For engineers considering a non-UL-approved alternative, the IRM series stands as a robust choice. Housed in durable aluminum and engineered for efficient chassis mounting, the IRM series offers similar power ratings and resistance options, making it a reliable solution for various industrial applications.

RARA ULM2800 Ordering Info

Below is the model number configuration for the ULM series from RARA.
Ordering example: ULM600N100ΩK

Series/Model (ULMXXX)


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

* 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

ULM Downloads

Supporting Manufacturer Information

  • RARA


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.