AHA25AFB-499R

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Chassis Mount Resistors: AHA25AFB-499R Application Field and Working Principle

Chassis mount resistors are electronic components designed to be incorporated into equipment and machinery designs where ruggedness and/or additional electrical isolation are required. If the project requires strong vibration or harsh environmental conditions, chassis mount resistors provide superior resistance from the elements and physical abuse.

The AHA25AFB-499R is a popular chassis mount resistor due to its wide application field and robust design. It is rated for up to 12W of power dissipation, with a maximum working voltage of 500V. This makes the AHA25AFB-499R an ideal choice for many industrial and automotive applications.

The AHA25AFB-499R is a two-terminal metal oxide film resistor housed in a silver-plated steel case. Its design utilizes an aluminum oxide ceramic substrate with an internal shielding layer to ensure stability. This layer of shielding provides additional isolation from electrical interference that could impact the performance of the resistor.

Bypass capacitors are often used in tandem with the AHA25AFB-499R for applications that have high electrical noise or interference. This allows for additional electrical isolation and protection from any sudden charge surges that could damage the resistor.

The AHA25AFB-499R also has a wide range of temperature ratings from -30°C to 100°C, making it suitable for a variety of extreme temperature applications. It is also rated for self-inductance under 10nH, providing a low inductance option for high-frequency applications.

The working principle of the AHA25AFB-499R is straightforward. When current passes through the resistor, the energy output is dissipated in the form of heat. This generated heat is dispersed and dissipated through a steel case, helping to keep the resistor from becoming too hot.

The AHA25AFB-499R is designed with a unique metal oxide film that offers a more stable resistance curve versus traditional wire-wound resistors. This metal oxide film produces more consistent results than conventional wire-wound resistors, making the AHA25AFB-499R a reliable choice for applications that require accurate and stable results. Additionally, its higher insulation resistance and higher resistance to high-frequency noise, make it ideal for circuits that need to remain functional in extreme conditions.

As a chassis mount resistor, the AHA25AFB-499R combines rugged construction and stable performance to work reliably in harsh environments and applications. Its insulation and shielding layers provide extra protection from interference and shocks, making it the perfect choice for industrial applications that require superior performance.

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