RARA ULM1200 Series

RARA ULM1200 Series

The ULM1200 metal clad wire wound resistor series from RARA offers a power rating of up to 1200W on a heat sink (480W in free air) with available resistance values between 0.1Ω and 175Ω (inductive design) or between 0.1Ω and 48Ω (non-inductive design). These high power resistors are UL approved available with tolerances of ±1.0%, ±2.0%, ±5.0% and ±10.0% as standard with other options available including flying leads or tab terminals, as well as inductive or non-inductive resistive windings. The ULM1200 series from RARA are a metal cover type with an extruded aluminium housing providing strong and rugged protection all with a temperature range from -55°C up to +200°C

  • Metal clad wire wound resistor
  • Option of flying leads, parallel or series terminal connections
  • Inductive resistance ranges available between 0.21Ω and 160Ω (flying leads), 0.1Ω and 25Ω (parallel tab terminal connection) or 25.1Ω and 175Ω (serial tab terminal connection)
  • Non-inductive resistance ranges available between 0.21Ω and 48Ω (flying leads), 0.1Ω and 12Ω (parallel terminal connection) or 12.1Ω and 48Ω (serial terminal connection)
  • TCR of +260 ppm/°C maximum
  • Tolerance values available of ±1.0%, ±2.0%, ±5.0% and ±10.0%
  • Power rating of 1200W on a heat sink (480W in free air)
  • Insulation resistance of 20MΩ minimum
  • UL approved
  • Metal cover type with an extruded aluminium housing
  • Temperature range between -55°C and +200°C
  • Short time overload of 10 x power rating for 5 seconds

Typical applications for the ULM series include:

  • Motor drives
  • braking and snubbing applications
  • Power sources for industrial equipment

The below table gives the specifications available for the ULM series including the ULM1200 resistors:

RARA ULM1200 Specifications

* Note: Tab TP = terminal parallel connection, Tab TS = terminal serial connection

Specifications
Additional Features
  • Metal clad wire wound resistor
  • Option of flying leads, parallel or series connections
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • UL approved
  • Metal cover type with an extruded aluminium housing
  • Short time overload of 10 x power rating is 5 seconds
Maximum Power Rating On heat sink
  • 1200W
In free air
  • 480W
Maximum Resistance Inductive
  • 160Ω (flying leads)
  • 175Ω (serial tab terminal connection)
  • 25Ω (parallel tab terminal connection)
Non-inductive
  • 48Ω (flying leads)
  • 48Ω (serial tab terminal connection)
  • 12Ω (parallel tab terminal connection)
Minimum Resistance Inductive
  • 0.21Ω (flying leads)
  • 25.1Ω (serial tab terminal connection)
  • 0.1Ω (parallel tab terminal connection)
 Non-inductive
  • 0.21Ω (flying leads)
  • 12.1Ω (serial tab terminal connection)
  • 0.1Ω (parallel tab terminal connection)
TCR ±260ppm/°C maximum
Tolerance
  • ±1.0% (F)
  • ±2.0% (G)
  • ±5.0% (J)
  • ±10.0% (K)

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 IRV, ULV, IRM and ULM 600 to 1200 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 ULM1200, ULM1200