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17750020 - 50W 20 Ohm Non-Inductive Aluminum Wire Wound Resistor

Packaging: pack of 1
$105.62/EA $63.74/pack of 1 only $63.74/EASave 40%

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OVERVIEW

High-Performance Industrial Power Resistor

The RES WW AL 50W 3% 20 OHM (NI) is a premium-grade electronic component designed for demanding industrial applications. Built with a robust wire-wound core, this resistor offers excellent stability and load-handling capabilities. The unit is encased in a durable aluminum housing, which not only provides physical protection against impact and vibration but also serves as an integrated heat sink. This design allows for efficient thermal management, ensuring the resistor operates reliably even under continuous 50-watt loads.

One of the standout features of this specific model is its Non-Inductive (NI) construction. Standard wire-wound resistors can introduce unwanted inductance into a circuit, which can be problematic in high-frequency applications or sensitive control systems. This non-inductive version is wound using a special technique that cancels out inductance, making it perfectly suited for use in power inverters, switching power supplies, and precision instrumentation found in industrial environments.

Whether you are maintaining a fleet of industrial machinery, repairing power distribution units, or building custom load banks, this 20-ohm resistor delivers the performance you need. Its chassis-mount design allows for easy and secure installation directly onto heat sinks or equipment panels, maximizing heat transfer and mechanical stability.

Key Industrial Benefits

  • Thermal Efficiency: Aluminum casing dissipates heat rapidly.
  • Signal Integrity: Non-inductive design prevents signal distortion in sensitive circuits.
  • Durability: Rugged construction withstands harsh industrial environments.
Additional Information
Watts:50 W
Resistance:20 Ohm
Packaging Description:1 Per Ea
Technology:Wire Wound
Housing Material:Aluminum
Features:Non-Inductive (NI)
Tolerance:3%

INCLUDED

  • 1 x 50W 20 Ohm Aluminum Wire Wound Resistor (Non-Inductive)

APPLICATIONS

  • Welding machine power source repair
  • Inverter circuit maintenance
  • High-frequency power supplies
  • Dynamic braking circuits
  • Industrial control systems
  • Dummy load testing

FAQ

(NI) stands for Non-Inductive. This means the wire is wound in a way that cancels out magnetic fields, reducing inductance, which is critical for high-frequency circuits.

This resistor is rated for 50 Watts of power dissipation.

It features an aluminum housing with screw holes, designed for chassis mounting to a metal surface or heat sink.

Yes, a non-inductive resistor can generally replace a standard inductive one of the same specs, often providing better performance.

You must check your machine's parts manual or the markings on the original resistor. If it specifies 50W and 20 Ohms, this is likely a suitable replacement.

The tolerance is listed as 3%, meaning the actual resistance is within 3% of 20 Ohms.

Aluminum is an excellent conductor of heat. The housing acts as a heat sink to keep the resistor cool during operation.

Using a resistor with a lower wattage rating than required (e.g., 25W instead of 50W) will likely cause the component to overheat and fail rapidly.