Ferrite Block Magnet – 25mm x 11mm x 5mm

The Ferrite Block Magnet – 25mm x 11mm x 5mm is a compact rectangular ceramic permanent magnet measuring 25mm long x 11mm wide x 5mm thick. Manufactured from ferrite magnetic material, this block magnet provides an economical and reliable magnetic solution for product assemblies, magnetic holding, positioning, displays, signage, craft, educational projects, manufacturing, prototypes and custom OEM applications.

Also known as a ceramic block magnet, rectangular ferrite magnet, ferrite bar magnet or ceramic rectangular magnet, its compact 25mm x 11mm footprint and slim 5mm thickness make it suitable for applications where a low-profile rectangular magnetic component is required. Ferrite magnets offer good natural corrosion resistance and resistance to demagnetisation, making them widely used for general-purpose magnetic applications.

As a permanent magnet, this ferrite block requires no electricity, batteries or charging to maintain its magnetic field.

Key Features

• 25mm length x 11mm width x 5mm thickness
• Compact rectangular block shape
• Slim 5mm profile
• Ferrite / ceramic permanent magnetic material
• Economical magnetic solution
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitable for magnetic holding and positioning
• Useful for product assemblies and closures
• Suitable for displays and signage
• Useful for craft and educational applications
• Permanent magnetic operation
• No electricity or batteries required
• Suitable for prototypes and OEM products

Common Applications

• Product assemblies
• Magnetic holding and positioning
• Displays and signage
• Magnetic closures
• Furniture and cabinetry
• Craft and DIY projects
• Fridge magnet assemblies
• Educational projects
• School science experiments
• Manufacturing
• Fixtures and jigs
• Models and prototypes
• Research and development
• Custom magnetic products
• OEM applications

25mm x 11mm x 5mm Ferrite Block Magnet

This rectangular ferrite magnet measures:

• Length: 25mm
• Width: 11mm
• Thickness: 5mm

Its compact rectangular geometry provides a useful magnetic footprint while maintaining a relatively low-profile form.

The shape can be convenient for integration into:

• Rectangular recesses
• Product housings
• Display assemblies
• Furniture components
• Magnetic closures
• Models
• Prototype equipment
• Custom manufactured products

The supplied dimensions describe the magnet's physical size and should not be interpreted as a pull-force or load-capacity rating.

Ferrite Ceramic Permanent Magnet

Ferrite magnets, commonly referred to as ceramic magnets, are widely used permanent magnets manufactured from iron oxide combined with ceramic magnetic materials.

Ferrite offers a useful combination of:

• Economical cost
• Permanent magnetic performance
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability for many general-purpose applications

Ferrite magnets typically have a dark grey to black ceramic appearance and generally do not require protective metallic plating for ordinary corrosion protection.

The specific ferrite magnetic grade of this magnet has not been supplied and should not be assumed.

Compact Low-Profile Magnetic Design

With a thickness of only 5mm, this ferrite block magnet can be incorporated into applications where installation depth is limited.

Potential uses include:

• Shallow recesses
• Magnetic closures
• Product housings
• Display systems
• Furniture components
• Models and prototypes
• Small fixtures
• Custom magnetic assemblies

When installing the magnet into a housing or recess, allow suitable clearance rather than force-fitting it into position.

Ferrite is a hard ceramic material and may crack if subjected to excessive mechanical pressure.

Magnetic Closures and Product Assemblies

This 25mm x 11mm x 5mm ferrite block magnet can be incorporated into magnetic closure, positioning and retention systems.

Potential applications include:

• Boxes
• Cabinets
• Cupboards
• Furniture
• Removable panels
• Product enclosures
• Display components
• Custom products

When using two magnets together, their magnetic orientation should be confirmed before permanent installation to ensure the intended faces attract rather than repel.

Where unexpected release could create a hazard, magnetic attraction should not be used as the sole means of retention.

Displays and Signage

The flat rectangular profile can also make this ferrite magnet useful for display and signage applications.

Potential uses include:

• Removable signs
• Magnetic displays
• Retail fixtures
• Promotional products
• Exhibition displays
• Point-of-sale materials
• Magnetic labels
• Display components

Practical holding performance will depend on the complete assembly, target steel and load direction.

Craft and DIY Applications

Compact ferrite block magnets are suitable for many craft and DIY projects.

They may be incorporated into:

• Handmade magnetic products
• Models
• Decorative displays
• Fridge magnet assemblies
• Magnetic closures
• Educational projects
• Custom craft components

When bonding the magnet, use an adhesive suitable for both the ferrite surface and the material being attached.

Magnetisation Direction

The magnetisation direction of this ferrite block magnet has not been supplied.

Rectangular magnets can be produced with different magnetic orientations, so the location of the north and south poles should not be inferred solely from the magnet's shape.

Magnetisation direction can affect:

• Pole location
• Working face orientation
• Magnet-to-magnet attraction
• Holding performance
• Sensor operation
• Magnetic circuit design

Where pole orientation is important, confirm the magnetisation direction before installation.

Magnetic Holding Performance

Actual magnetic performance depends on factors including:

• Ferrite magnetic grade
• Magnetisation direction
• Target steel thickness
• Target steel composition
• Available contact area
• Surface flatness
• Air gaps
• Paint and coatings
• Magnet orientation
• Load direction
• Magnetic circuit design

No specific pull force or magnetic flux density in Gauss has been supplied for this product and these values should not be inferred from its dimensions.

Direct Pull vs Shear Force

Magnetic holding performance changes according to the direction of the applied load.

Direct pull occurs when force attempts to separate the magnet perpendicular to the target steel surface.

Shear loading occurs when force acts parallel to the target surface and encourages the magnet to slide.

For this reason, practical vertical holding performance may be considerably lower than ideal direct-pull performance.

Air Gaps and Surface Condition

Magnetic attraction generally improves when the magnet is positioned close to clean, suitable ferromagnetic steel.

Performance can be reduced by gaps created by:

• Paint
• Powder coating
• Adhesive
• Plastic
• Dirt
• Rust
• Protective layers
• Uneven surfaces

Because this is a relatively compact magnet, even small air gaps can have a noticeable effect on practical magnetic performance.

Bonding a Ferrite Block Magnet

The flat rectangular surfaces make this magnet suitable for adhesive installation into compatible housings and recesses.

For bonding:

• Clean the magnet and substrate
• Remove dust, oil, grease and contamination
• Select an adhesive compatible with both materials
• Follow the adhesive manufacturer's preparation instructions
• Avoid unnecessarily thick adhesive layers
• Allow the adhesive to cure fully
• Avoid force-fitting the magnet into an undersized recess

Mechanical pressure should be kept within appropriate limits because ferrite is brittle.

Compatible Target Materials

Ferrite magnets attract ferromagnetic iron and compatible steels.

Suitable target materials can include:

• Mild steel
• Iron
• Magnetic steel
• Ferromagnetic fasteners
• Compatible steel components

Ferrite magnets will not effectively attract non-magnetic materials such as:

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

Many stainless steel grades may also provide weak or negligible magnetic attraction and should be tested before use.

Ferrite vs Neodymium Block Magnets

Ferrite and neodymium are both permanent magnetic materials, but their characteristics differ.

Ferrite magnets generally provide:

• Economical magnetic performance
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability for many general-purpose applications
• No requirement for metallic protective plating in many environments

Neodymium magnets generally provide:

• Significantly higher magnetic strength relative to size
• Greater magnetic performance from compact dimensions
• Suitability where installation space is restricted and stronger attraction is required

Ferrite is often selected where cost effectiveness, corrosion resistance and reliable general-purpose magnetic performance are more important than obtaining maximum magnetic strength from the smallest possible magnet.

Educational and Science Applications

Ferrite block magnets can also be useful for supervised educational activities involving magnetic principles.

Potential demonstrations include:

• Magnetic attraction
• Magnetic repulsion
• North and south poles
• Magnetic fields
• Ferromagnetic materials
• Magnet-to-magnet interaction
• Simple magnetic mechanisms

Because the magnetisation direction has not been supplied, pole locations should be confirmed where an experiment depends on a particular orientation.

Permanent Magnetic Operation

This 25mm x 11mm x 5mm ferrite block is a permanent magnet.

It requires:

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

Its magnetic field remains continuously active during normal use.

Technical Specifications

• Product Type: Ferrite Block Magnet
• Alternative Names: Ceramic Block Magnet, Rectangular Ferrite Magnet, Ferrite Bar Magnet, Ceramic Rectangular Magnet
• Length: 25mm
• Width: 11mm
• Thickness: 5mm
• Shape: Rectangular Block
• Magnetic Material: Ferrite / Ceramic
• Magnet Type: Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Target Materials: Compatible ferromagnetic iron and steel
• Primary Functions: Magnetic attraction, holding, positioning and integration into magnetic assemblies
• Typical Applications: Product assemblies, displays, closures, craft, education, manufacturing, prototypes and OEM products

Handling Ferrite Block Magnets

Ferrite is a hard and brittle ceramic magnetic material.

The relatively slim profile of this magnet means care should be taken to avoid bending, impact and mechanical leverage.

Avoid:

• Dropping the magnet onto hard surfaces
• Allowing magnets to collide forcefully
• Applying bending forces
• Force-fitting into undersized recesses
• Drilling
• Cutting
• Conventional machining

Broken ferrite pieces may have sharp edges and should be handled carefully.

Please Note

This product is a Ferrite Block Magnet measuring 25mm long x 11mm wide x 5mm thick, manufactured from ferrite / ceramic permanent magnetic material.

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

Actual magnetic performance depends on magnetic grade, magnetisation direction, target steel thickness and composition, available contact area, air gaps, surface condition, magnet orientation and load direction.

Ferrite provides good natural corrosion resistance and resistance to demagnetisation but is a hard and brittle ceramic material. Avoid impact, bending, drilling, cutting, machining and force-fitting.

Keep magnets securely away from babies and young children and supervise their use in craft and educational applications.