Chassis Mount Resistors

Few resistors are as versatile as the UAL25-3R3F8. It is widely used to provide a broad range of protection and filtering capabilities for many different types of electronic circuits. As a chassis mount resistor, the UAL25-3R3F8 offers a powerful combination of better-than-average noise attenuation, ohms per watt resistance value, and surge capability. In this article, we\'ll look at the application field and working principle of this popular chassis mount resistor.

Application Field

The UAL25-3R3F8 is primarily used to provide over-voltage protection and filtering capabilities. Its combination of power handling capacity, noise suppression, and surge protection makes it a great choice for protecting electronic circuits and components from voltage spikes and high current loads.

It is also often used as a power resistor in a variety of applications, including DC motor drives, power inverters, and power switches. With its ability to handle large current loads, the UAL25-3R3F8 ensures that electronic circuits remain within the safe operating amperage range.

The UAL25-3R3F8 is also often used to protect low-voltage AC power supplies and other power stages by providing noise and surge protection. This makes it a perfect companion for low-voltage switch-mode power supplies and other power stages that are prone to be affected by noise and interference.

Working Principle

The UAL25-3R3F8 utilizes a combination of fixed and adjustable resistors in order to achieve its high power handling capacity and noise suppressant capabilities. At its core is two adjustable elements, a low-ohm resistor and a non-inductive resistor that is adjusted for the particular application. The better- than-average surge capacity of the UAL25-3R3F8 is realized by the presence of the low-ohm resistor that ensures that all current is spread across a wide area, reducing the likelihood of damage to sensitive electronics.

The non-inductive resistor is also adjustable and is primarily responsible for providing noise suppression. When large voltage spikes occur, the non-inductive resistor dissipates the energy, effectively preventing large voltage peaks from reaching sensitive electronics.

The UAL25-3R3F8 also utilizes an over-voltage protection circuit that helps to protect the resistor against very high voltages. The over-voltage protection circuit acts like a fuse and will automatically shut off the resistor if the voltage exceeds a certain limit. This helps to ensure that the resistor remains in good working condition even in the event of an unexpected power spike.

Conclusion

As you can see, the UAL25-3R3F8 is an incredibly versatile chassis mount resistor. Its combination of better- than-average noise attenuation, ohms per watt resistance value, and surge capability make it an ideal choice for protecting a wide range of electronic circuits and components. It is also easy to install and is highly reliable, making it an excellent choice for many different applications.