The 25W 20 Ohm Non-Inductive Wire Wound Resistor is a critical component designed for high-performance industrial applications, including the repair and maintenance of welding power sources. Encased in a durable aluminum housing, this resistor is engineered to handle significant power loads while maintaining exceptional stability. The aluminum shell not only protects the internal winding but also acts as a heat sink, allowing for efficient thermal dissipation when mounted to a chassis. This ensures the component operates within safe temperature ranges even during prolonged use in demanding environments.
One of the standout features of this resistor is its Non-Inductive (NI) construction. Standard wirewound resistors can act like inductors, creating unwanted reactance in high-frequency circuits. This "NI" version typically utilizes Ayrton-Perry winding or similar techniques to cancel out inductance. This makes it particularly suitable for high-frequency applications found in modern inverter welding machines, HF start circuits, and precision power supplies where signal purity and fast response times are paramount.
With a tight 1% tolerance, this resistor offers precision that standard 5% or 10% components cannot match. This accuracy is vital for control circuits where specific resistance values dictate voltage drops or current limits. Whether you are troubleshooting a fault in a TIG welder's high-frequency board or replacing a burnt-out load resistor in a power supply unit, this component provides the reliability required for professional repairs. Its rugged construction resists vibration and thermal shock, common stressors in industrial workshop environments.
| Additional Information |
|---|
| Watts:25 W |
| Resistance:20 Ohm |
| Tolerance:1% |
| Type:Wire Wound, Non-Inductive, Aluminum-Housed |
| Packaging Description:1 Per Ea |
