Ferrite Disc Magnet – 15mm x 3mm

The Ferrite Disc Magnet – 15mm x 3mm is a compact and cost-effective ceramic permanent magnet measuring 15mm in diameter x 3mm thick. Manufactured from ferrite magnetic material, this round disc magnet provides reliable permanent magnetic attraction for lightweight holding, positioning, craft, educational and general-purpose applications.

Also known as a ceramic disc magnet, round ferrite magnet or ceramic permanent magnet, ferrite magnets are valued for their good resistance to demagnetisation, natural corrosion resistance and economical performance. Unlike neodymium magnets, ferrite magnets generally do not require a protective surface coating for normal indoor use.

The slim 15mm x 3mm profile makes this ferrite disc suitable for craft and DIY projects, fridge magnet assemblies, displays, signage, educational demonstrations, closures, product assemblies and light industrial applications where a small permanent magnet is required.

Key Features

• 15mm diameter x 3mm thickness
• Ferrite / ceramic permanent magnet
• Compact round disc shape
• Cost-effective magnetic material
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Permanent magnetic operation
• No electricity or batteries required
• Suitable for lightweight holding and positioning
• Useful for craft, education, displays and manufacturing
• Can be incorporated into custom magnetic assemblies

Common Applications

• Fridge magnet assemblies
• Craft and hobby projects
• DIY applications
• School science projects
• Classroom demonstrations
• Displays and signage
• Lightweight closures
• Product assemblies
• Educational experiments
• Holding and positioning
• Manufacturing
• Prototyping

Compact 15mm x 3mm Disc Magnet

This ferrite magnet measures 15mm in diameter and 3mm thick, giving it a thin, compact profile suitable for applications where installation space is limited.

Its round shape makes it convenient for incorporation into:

• Recesses
• Product housings
• Display components
• Craft projects
• Educational models
• Closures
• Custom assemblies

The 15mm x 3mm dimensions describe the physical size of the magnet and should not be interpreted as a pull-force rating.

What Is a Ferrite Magnet?

Ferrite magnets, commonly called ceramic magnets, are permanent magnets manufactured using iron oxide combined with ceramic materials.

They are widely used because they offer a practical combination of:

• Cost-effective magnetic performance
• Good resistance to corrosion
• Good resistance to demagnetisation
• Long-term permanent magnetic operation
• Broad general-purpose usability

Ferrite magnets typically have a dark grey to black ceramic appearance and usually do not require an additional protective coating for normal applications.

Ferrite vs Neodymium Magnets

Ferrite and neodymium are both permanent magnetic materials, but they have different characteristics.

Ferrite magnets are generally:

• More economical
• Naturally resistant to corrosion
• Less powerful relative to their size
• Suitable for many general-purpose applications

Neodymium magnets generally provide substantially stronger magnetic performance relative to their physical dimensions, making them preferable where high magnetic strength is required within a small space.

For applications where compact size and very high magnetic strength are not essential, ferrite can provide a practical and economical alternative.

Magnetic Holding Performance

Actual magnetic holding performance depends on the complete application.

Factors that can affect magnetic attraction include:

• Target steel thickness
• Steel composition
• Surface flatness
• Contact area
• Air gaps
• Paint and coatings
• Adhesive layers
• Load direction
• Magnet orientation
• Distance from the target

No specific pull force or Gauss rating has been supplied for this ferrite disc magnet, so magnetic performance should not be inferred solely from its 15mm x 3mm dimensions.

Direct Contact with Steel

For strongest practical attraction, the magnet should make close contact with a clean, flat and sufficiently thick ferromagnetic steel target.

Magnetic attraction can be reduced by gaps created by:

• Paint
• Adhesive
• Plastic
• Paper
• Fabric
• Protective coatings
• Dirt
• Uneven surfaces

Magnetic attraction also decreases rapidly as the distance between the magnet and target increases.

Bonding Ferrite Disc Magnets

The flat faces of a disc magnet make this shape convenient for bonding into compatible products and assemblies.

Potential applications include:

• Fridge magnets
• Craft products
• Displays
• Signs
• Closures
• Educational models
• Product components

When bonding the magnet, ensure both surfaces are clean and use an adhesive suitable for the ferrite magnet and substrate material.

Follow the adhesive manufacturer's instructions for preparation, application and curing.

Compatible Target Materials

Ferrite magnets are designed to attract ferromagnetic iron and steel.

Suitable target materials may include:

• Mild steel
• Iron
• Magnetic steel sheet
• Ferromagnetic components

Ferrite magnets will not effectively attract materials such as:

• Aluminium
• Copper
• Brass
• Plastic
• Timber
• Glass

Many stainless steel grades may also provide little or no magnetic attraction.

Permanent Magnetic Operation

This ferrite disc is a permanent magnet, meaning no external power source is required to maintain its magnetic field.

It requires:

• No electricity
• No batteries
• No charging
• No electrical wiring

This makes ferrite disc magnets suitable for simple, passive magnetic products and assemblies.

Technical Specifications

• Product Type: Ferrite Disc Magnet
• Alternative Names: Ceramic Disc Magnet, Round Ferrite Magnet, Ceramic Permanent Magnet, Ferrite Round Magnet
• Diameter: 15mm
• Thickness: 3mm
• Shape: Disc / Round
• Magnetic Material: Ferrite / Ceramic
• Magnet Type: Permanent Magnet
• Typical Appearance: Dark grey to black
• Magnetic Operation: Permanent
• Power Required: None
• Target Material: Compatible ferromagnetic iron and steel
• Primary Function: Lightweight holding, positioning and magnetic attraction
• Typical Applications: Craft, education, displays, fridge magnet assemblies, closures and manufacturing

Craft, Hobby and DIY Applications

The compact 15mm diameter makes this ferrite disc magnet useful for creative and practical projects.

Potential uses include:

• Handmade fridge magnets
• Craft products
• Models
• Magnetic closures
• Displays
• DIY storage solutions
• Decorative assemblies

Its economical ferrite construction can also make it suitable for projects requiring multiple magnets.

School Science and Educational Applications

Ferrite disc magnets are commonly used to demonstrate basic magnetic principles in educational settings.

They may be used to explore concepts such as:

• Magnetic attraction and repulsion
• North and south magnetic poles
• Ferromagnetic materials
• Magnetic fields
• Distance and magnetic attraction

Appropriate supervision should be provided when magnets are used by children.

Handling Ferrite Magnets

Ferrite is a hard and brittle ceramic material.

Although ferrite magnets are durable under normal use, they can chip, crack or break if they:

• Strike each other
• Snap forcefully onto steel
• Are dropped onto a hard surface
• Are subjected to excessive mechanical stress

Ferrite magnets should not be drilled, cut or machined using conventional methods.

Please Note

This product is a Ferrite Disc Magnet measuring 15mm in diameter x 3mm thick.

No specific ferrite grade, pull force, Gauss rating, magnetisation direction, dimensional tolerance or maximum operating temperature has been supplied and these specifications should not be assumed.

Actual magnetic holding performance depends on the target steel, available contact area, surface condition, air gaps, coatings, adhesive layers and load direction.

Ferrite is a hard and brittle ceramic magnetic material and may chip or fracture if dropped, struck or allowed to collide forcefully with another magnet or steel surface.

Keep magnets away from small children and sensitive magnetic or electronic equipment.