What Is a Ferrite Clamp?

••• Piotr Wytrazek/iStock/GettyImages

A ferrite clamp, or ferrite choke, is a device used to reduce the amount of RF (radio frequency) noise, or interference, in a wire that conducts electricity. Ferrite clamps are typically used to improve the performance of sound systems, including microphones.


Ferrite is name given to ceramics formed from various metal oxides. Oxides of iron, manganese, manganese and zinc and nickel and zinc are the most common forms of ferrite.


Ferrite clamps usually consist of a two halves of ferrite that are, literally, clamped around a conducting wire. Ferrite is a highly permeable material and provides less resistance to the flow of magnetic flux in the conductor than air alone, so a ferrite clamps effectively absorbs some of the noise in the wire.


Ferrite may be a highly permeable, but it is also very fragile. Ferrite clamps must therefore be protected against physical damage.

Related Articles

Memory Wire Size & Gauge Information
How Do Air Core Transformers Work?
Parts of Induction Motors
Types of Electrical Cable
How Does a Solenoid Work?
The Properties of Insulators
How to Make a Capacitor
How to Mount a Circuit Board in an Electronic Project...
What Are the Different Types of Ballast?
How to Build an Electromagnet
What Is the Difference Between an Inductor & a Choke?
The Uses of Different Shaped Magnets
Difference Between 316 & 308 Stainless Steel
What Is a Hi-Shear Fastener?
How Does a Toroidal Transformer Work?
The Difference Between a Brushed & Brushless Motor
What Are the Advantages & Disadvantages of Diode Lasers?
What Is ARCAP Alloy?
Physical Characteristics of Aluminum Oxide
What Is a Toroid Coil?