Inductors
Two-terminal components used for filtering, energy storage and timing applications
Inductors oppose a change in current by inducing an electromotive force (or e.m.f.) according to Lenz’s Law. They store energy as magnetic fields. Chokes are inductors that block AC while allowing DC to pass. The unit of inductance is Henry (H). You can find all the inductor components you need, including fixed inductors, variable inductors and inductor kits, plus a wide range of other passive components via our platform.
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Introducing Inductors
Inductors are essential components that store energy in a magnetic field as electrical current flows through them, making them indispensable in filtering, energy storage, and signal processing. They come in different shapes and sizes, each suited for specific functions in electronics, such as power supplies, radio frequency circuits, and transformers. Understanding their role helps you select the best inductor for your project, ensuring optimal performance and efficiency. This know-how is fundamental for anyone involved in electronics, from professional engineers to hobbyists.
How Inductors Work/What They Do
Inductors function by resisting changes in current, making them useful for filtering and energy storage. When current flows through an inductor, it forms a magnetic field around it, storing energy that can be released when the current decreases. This property allows inductors to smooth out voltage fluctuations in power supplies, ensuring stable operation of electronic devices.
In tuning circuits, inductors select specific frequencies, which is essential in radio and communication systems. The power to store and release energy makes inductors versatile components in various electronic applications, from simple filters to complex signal processing circuits.
Types of Inductors
Electrical inductors come in various types, each serving a specific application. Understanding inductor types helps in selecting the right one for your needs:
- Fixed Inductors: These have a set inductance value and are used in applications requiring constant inductance. They're commonly found in power supplies and filters. Fixed inductors are reliable and offer stable performance, making them ideal for circuits where maintaining a specific inductance is crucial. Fixed inductors are often constructed with a wire coil wound around a core, which can be made of air, ferrite, or iron.
- Variable Inductors: These allow for the adjustment of inductance in tuning circuits. They're ideal for applications where precise control of inductance is needed. Variable inductors typically feature a movable core or adjustable coil, which allows for fine-tuning of the inductance value. This adjustability makes them suitable for radio frequency (RF) circuits, oscillators, and other applications requiring frequency tuning.
- Surface-mount inductors: These are compact and designed for high-density circuit boards. They're used in applications where space is limited. Surface-mount inductors are soldered directly onto the surface of printed circuit boards (PCBs), making them ideal for modern electronic devices that require miniaturization. They offer excellent performance in high-frequency applications and are typically used in mobile devices, computers, and other compact electronic equipment.
- Through-Hole Inductors: These are larger and used in applications requiring higher power handling. They're ideal for power supplies and other high-power applications. Through-hole inductors are inserted into holes drilled in PCBs and soldered on the opposite side, providing a strong mechanical bond. They can handle higher currents and power levels, making them suitable for industrial equipment, power amplifiers, and other applications.
Frequently Asked Questions About Inductors
Inductors are vital components in many electronic circuits, and understanding their functions and applications can be crucial for engineers and designers. Below are some of the most common questions about inductors, along with detailed answers to help you make informed decisions when purchasing these components.
What Is an Electrical Inductor?
Inductors are passive electronic components that accumulate energy in a magnetic field as an electrical current passes through them. This energy storage capability makes inductors essential for various applications, including filtering, energy storage, and signal processing. Inductors are typically made of a coil of wire, which can be wound around a core made of magnetic or non-magnetic material. The inductance value, measured in Henries (H), depends on factors such as the number of turns in the inductor coil, the core material, and the coil's geometry.
Use Octopart's Exclusive Comparison Tool to Find the Best Inductors for Your Project
The handy Octopart comparison tool lets you see how components from leading inductor manufacturers measure up so you can decide which one is the best for your project. All of the inductor components we feature are high-quality parts and include fixed, variable, surface mount, and through-hole inductors. With the help of our platform, you can source inductors for sale with ease and confidence, knowing you're getting reliable components for your electronic designs.