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