Vishay / Dale RH/NH Chassis Mount Industrial Wirewound Resistors

Vishay / Dale RH and NH Chassis Mount Industrial Wirewound Resistors are aluminum housed resistors that are completely welded and molded for total environmental protection. The fixed RH and NH resistors are available in a 0.01Ω to 273KΩ resistance range with seven tolerance options: ±0.05%, ±0.1%, ±0.25%, ±0.5%, ±1%, ±3%, and ±5%. Power ratings range from 7.5W to 250W with operation from -55°C up to +250°C. The NH components are a non-inductive style with Ayrton-Perry winding.

Features

Molded construction for total environmental protection
Complete welded construction
Meets applicable requirements of MIL-PRF-18546
Mounts on chassis to utilize heat-sink effect
Aluminum housing
AEC-Q200 qualified

Available in non-inductive styles (type NH) with Ayrton-Perry winding for lowest reactive components
Excellent stability in operation (<1% change in resistance)
Lead-free and halogen-free
RoHS compliant [except for parts with lead (Pb) terminations]

Specifications

7.5W, 12.5W, 25W, 50W, 100W, and 250W power rating options
Resistance ranges
- 0.5Ω to 116KΩ for ±0.05% and ±0.1% tolerance rated components
- 0.1Ω to 116KΩ for ±0.25% tolerance rated components
- 0.05Ω to 116KΩ for ±0.5% tolerance rated components
- 0.01Ω to 273KΩ for ±1%, ±3%, and ±5% tolerance rated components
Temperature coefficients
- ±20ppm/°C for 10Ω and above
- ±50ppm/°C for 1Ω to 9.9Ω
- ±100ppm/°C for 0.1Ω to 0.99Ω

Insulation resistance
- 10,000MΩ minimum dry
- 1000MΩ minimum after moisture test
-55°C up to +250°C operating temperature range
Materials
- Copper-nickel alloy or nickel-chrome alloy element, depending on resistance value
- Ceramic, steatite, or alumina core, depending on the physical size
- Silicone molded construction
- Aluminum housing with hard anodic coating
- Stainless steel end caps

Vishay / Dale RH/NH Chassis Mount Industrial Wirewound Resistors

Features

Specifications

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