Adjustable Inductors

1. Variable Air Core Inductors

Variable air core inductors are designed without a magnetic core, using air as the dielectric medium. These inductors are primarily used in high-frequency applications due to their low loss characteristics. The inductance is adjusted by changing the spacing between the coils or by altering the coil's geometry.

2. Ferrite Core Adjustable Inductors

Ferrite core adjustable inductors utilize a ferrite material as the core, which enhances the magnetic field and increases inductance. These inductors are commonly used in RF applications and power supplies, where higher inductance values are needed. The inductance is adjusted by moving the ferrite core in and out of the coil.

3. Tunable Inductors with Slug Cores

Tunable inductors with slug cores feature a threaded core that can be screwed in or out to vary the inductance. This type is often used in precision tuning applications, such as in RF amplifiers and oscillators, where exact inductance values are critical for performance.

When selecting adjustable inductors, several key parameters must be considered:

• Inductance Range: Ensure the inductor covers the required inductance range for your application.
• Frequency Range: Choose an inductor that operates efficiently within your circuit's frequency range.
• Quality Factor (Q): A higher Q factor indicates lower energy losses, which is crucial for high-frequency applications.
• Power Handling: Consider the maximum current and voltage the inductor can handle without saturation or damage.
• Physical Size: Ensure the inductor fits within the spatial constraints of your design.

Evaluate product quality and reliability by reviewing supplier certifications, customer reviews, and testing data. Consider environmental factors such as temperature and humidity, and ensure the inductor is suitable for the intended installation environment.