Neodymium Block Magnets – 5mm x 1.7mm x 3mm | N50 | Magnetised Through 3mm | 100 Pack

Description

The Neodymium Block Magnets – 5mm x 1.7mm x 3mm | N50 | 100 Pack are miniature, high-performance rare earth magnets designed for precision applications requiring compact dimensions, strong magnetic properties and a specific magnetisation direction.

Manufactured from N50 grade Neodymium Iron Boron (NdFeB), each rectangular block magnet measures 5mm long x 1.7mm wide x 3mm high and is magnetised through the 3mm dimension. This means the north and south magnetic poles are located on the two opposing 5mm x 1.7mm faces.

Despite their miniature size, these N50 neodymium magnets provide high magnetic energy density, making them suitable for integration into small electronic components, precision mechanisms, miniature magnetic assemblies, sensors and specialised engineering applications.

Supplied in a convenient pack of 100 individual magnets, they are ideal for prototype development, repetitive manufacturing, product assembly and applications requiring multiple identical magnetic components.

Their small rectangular profile makes them particularly useful for installations where space is limited and the direction of the magnetic field is important.

Also known as miniature neodymium block magnets, N50 rare earth magnets, micro rectangular magnets, small NdFeB magnets, 5mm neodymium magnets or precision magnetic blocks, these permanent magnets provide magnetic attraction without electricity, batteries or charging.

Key Features

• Pack quantity: 100 individual magnets

• Dimensions per magnet: 5mm x 1.7mm x 3mm

• Length: 5mm

• Width: 1.7mm

• Height: 3mm

• Magnetic material: Neodymium Iron Boron (NdFeB)

• Magnetic grade: N50

• Shape: Miniature rectangular block

• Magnetisation: Through the 3mm dimension

• Pole configuration: North and south poles on opposite 5mm x 1.7mm faces

• High magnetic energy density relative to size

• Compact design for space-restricted applications

• Suitable for precision engineering

• Ideal for electronics and miniature mechanisms

• Useful for magnetic sensors and switching systems

• Suitable for custom magnetic assemblies

• Convenient bulk pack of 100

• Permanent magnetic operation

• No electricity or batteries required

Common Applications

These miniature N50 neodymium block magnets are suitable for a wide range of precision applications, including:

• Electronics manufacturing

• Miniature magnetic assemblies

• Precision engineering

• Small mechanical mechanisms

• Magnetic sensors

• Hall-effect sensing systems

• Reed switches

• Position detection

• Proximity sensing

• Magnetic switching

• Model making

• Miniature closures

• Product development

• Research and development

• Laboratory testing

• Prototype manufacturing

• Custom magnetic components

• OEM manufacturing

• Educational demonstrations

Suitability depends on the required magnetic field, operating conditions, mechanical design and complete assembly configuration.

N50 Grade Neodymium Magnets

These miniature block magnets are manufactured from N50 grade Neodymium Iron Boron, a high-performance rare earth magnetic material.

N50 offers high magnetic energy density, allowing substantial magnetic performance to be achieved from relatively small magnet volumes.

This makes N50 neodymium particularly useful for applications where installation space is restricted.

What Does N50 Mean?

N50 identifies the magnetic energy classification of the NdFeB material.

The designation relates to the material's maximum energy product and helps distinguish it from other neodymium grades.

N50 does not mean 50kg pull force.

The actual magnetic attraction depends on the magnet's dimensions, magnetisation direction, magnetic circuit, target material and installation conditions.

Magnetised Through the 3mm Dimension

One of the defining features of these magnets is their specified magnetisation direction.

Each magnet is magnetised through its 3mm dimension, meaning the magnetic field is oriented along that axis.

The north and south poles are located on the two opposing 5mm x 1.7mm rectangular faces.

This orientation is important when incorporating the magnets into:

• Miniature magnetic mechanisms

• Electronic assemblies

• Magnetic sensing systems

• Precision positioning devices

• Custom magnetic circuits

• Small magnetic closures

Why Does Magnetisation Direction Matter?

The direction of magnetisation determines where the magnetic poles are positioned and influences how a magnet interacts with other magnets, steel components and magnetic sensors.

A block magnet magnetised through its 3mm dimension may perform differently from an otherwise identical magnet magnetised through its 1.7mm or 5mm dimension.

For applications requiring a specific magnetic field orientation, selecting the correct magnetisation direction is essential.

Miniature 5mm x 1.7mm x 3mm Design

Each magnet measures 5mm x 1.7mm x 3mm, providing a compact rectangular shape suitable for precision installations.

This geometry is particularly useful where:

• Installation space is extremely limited

• Small magnetic components are required

• A rectangular profile is preferred

• The magnet must fit inside a miniature housing

• A specific magnetic pole orientation is needed

• Multiple identical magnets are incorporated into an assembly

The dimensions refer to each individual magnet, not the combined size of the pack.

100 Pack – Suitable for Manufacturing and Prototyping

These magnets are supplied in a pack of 100 individual pieces.

Bulk packaging is useful for applications requiring multiple matching components, including:

• Product manufacturing

• Prototype development

• Engineering experiments

• Electronics assembly

• Research projects

• Repetitive component installation

• Small production runs

• Custom magnetic systems

The 100-piece pack allows manufacturers and developers to evaluate different configurations using magnets of the same specified dimensions, grade and magnetisation direction.

Electronics and Sensor Applications

Miniature neodymium block magnets can be used as magnetic field sources in compatible electronic sensing systems.

Potential applications include:

• Hall-effect sensors

• Reed switches

• Position detection

• Proximity sensors

• Magnetic switching

• Movement detection

• Electronic instrumentation

The magnet's 3mm magnetisation direction should be considered when determining its position relative to the sensor.

Sensor performance depends on the magnetic field at the sensing location, sensor sensitivity, operating distance and surrounding materials.

Precision Engineering and Miniature Mechanisms

These small rectangular magnets may be incorporated into compact mechanical assemblies requiring permanent magnetic interaction.

Potential applications include:

• Miniature positioning mechanisms

• Small magnetic closures

• Alignment systems

• Custom magnetic couplings

• Precision components

• Prototype mechanisms

• Specialised equipment

For applications involving movement, vibration or repeated operation, the magnets should be securely retained within the assembly.

Magnetic Performance

The practical magnetic performance of these N50 block magnets depends on:

• Magnetic material properties

• Individual magnet dimensions

• Magnetisation direction

• Magnetic pole orientation

• Magnetic circuit design

• Target material

• Target steel thickness

• Contact area

• Air gaps

• Operating temperature

• Load direction

No specific pull force or surface Gauss rating has been supplied.

These values should not be inferred from the N50 grade alone.

Magnetic Holding and Retention

Although these magnets are manufactured from high-performance N50 material, their miniature dimensions limit the total magnetic material volume and available contact area.

For magnetic holding applications, performance should be assessed using the actual finished assembly.

Factors affecting holding strength include:

• Target steel composition

• Target steel thickness

• Surface coatings

• Contact area

• Air gaps

• Mechanical leverage

• Installation orientation

These magnets are best suited to appropriately designed miniature magnetic systems rather than heavy-duty holding applications.

Direct Pull vs Shear Force

Magnetic holding performance varies according to load direction.

Direct pull occurs when the magnet is separated perpendicular to the attracting surface.

Shear force occurs when the magnet is encouraged to slide parallel to the target surface.

Shear performance depends on friction, contact conditions and mechanical design.

For reliable retention, test the magnets under the intended operating conditions.

Air Gaps Reduce Magnetic Attraction

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

Potential sources of air gaps include:

• Adhesive

• Paint

• Protective coatings

• Plastic housings

• Mechanical clearance

• Surface irregularities

Because these magnets are extremely small, even relatively thin non-magnetic layers may significantly affect the magnetic interaction.

Where practical, minimise unnecessary separation between the magnet and the intended target.

Bonding and Installation

Adhesive bonding may be suitable for securing these miniature magnets within compatible housings.

Before installation:

1. Confirm the required magnetic polarity.

2. Identify the opposing 5mm x 1.7mm pole faces.

3. Clean the bonding surfaces.

4. Select an adhesive compatible with the magnet's actual coating.

5. Apply adhesive carefully to avoid excessive build-up.

6. Position the magnet within the assembly.

7. Avoid force-fitting or excessive mechanical pressure.

8. Allow the adhesive to cure according to the manufacturer's instructions.

9. Verify the magnet is securely retained.

The exact coating or plating of these magnets has not been supplied, so adhesive compatibility should be confirmed before permanent installation.

Important: Where these magnets are incorporated into consumer products, appropriate mechanical retention may be necessary to prevent the small magnets from becoming detached.

Avoid Force-Fitting

Neodymium Iron Boron is a hard but brittle magnetic material.

Do not force the magnets into undersized holes, recesses or housings.

Excessive pressure can cause:

• Chipping

• Cracking

• Fracturing

• Damage to protective coatings

Provide appropriate dimensional clearance and use a suitable retention method.

Do Not Machine Neodymium Magnets

Finished neodymium magnets should not normally be mechanically modified.

Avoid:

• Drilling

• Cutting

• Grinding

• Filing

• Crushing

• Machining

These processes can damage the brittle magnetic material and any protective coating.

If a different size or shape is required, select a magnet manufactured to the required dimensions.

Compatible Magnetic Materials

Neodymium magnets attract suitable ferromagnetic materials, including:

• Iron

• Mild steel

• Magnetic steel

• Compatible ferromagnetic components

They do not effectively attract inherently non-magnetic materials such as:

• Aluminium

• Copper

• Brass

• Plastic

• Timber

• Glass

Some stainless steel grades are magnetic, while others may be weakly magnetic or non-magnetic.

Test the intended target material where compatibility is important.

N50 Neodymium vs Ferrite Magnets

Neodymium magnets generally provide higher magnetic energy density than conventional ferrite magnets.

N50 neodymium may be preferred for:

• Miniature magnetic assemblies

• Compact electronic devices

• Precision mechanisms

• Magnetic sensors

• Space-restricted designs

• Custom magnetic systems

Ferrite magnets may be preferred for:

• More economical applications

• Larger magnetic components

• Applications benefiting from natural corrosion resistance

• Designs where lower magnetic energy density is acceptable

Material selection should consider the required magnetic field, operating conditions, dimensions and overall product design.

Permanent Magnetic Operation

These N50 block magnets are permanent magnets.

They require:

• No electricity

• No batteries

• No charging

• No external power supply

Their magnetic fields remain continuously active during normal use.

Technical Specifications

Compliance & Safety

Important: These are extremely small, powerful neodymium magnets and present a serious ingestion hazard.

Swallowing Hazard: If swallowed, multiple magnets or a magnet and another metal object can attract through intestinal walls, causing severe internal injuries. Seek urgent medical attention if ingestion is suspected.

Keep Away From Children: These magnets are not toys and must be stored securely away from babies, children and vulnerable individuals.

Secure Retention: When incorporated into finished products, ensure the magnets cannot become detached during normal use or foreseeable misuse.

Brittle Material: Neodymium Iron Boron is hard but brittle. Magnets can chip, crack or fracture if dropped, struck or allowed to collide.

Pinch Hazards: Magnetic attraction can cause magnets to snap together or onto ferromagnetic surfaces.

Do Not Machine: Avoid drilling, cutting, grinding or modifying the magnets.

Medical Devices: Keep magnets at an appropriate distance from pacemakers, implanted medical devices and magnetically sensitive equipment.

Lifting Applications: These magnets are not certified lifting equipment and must not be used for overhead or safety-critical lifting.

Frequently Asked Questions

How many magnets are included?

Each pack contains 100 individual neodymium block magnets.

What are the dimensions of each magnet?

Each magnet measures 5mm long x 1.7mm wide x 3mm high.

What does magnetised through 3mm mean?

It means the north and south magnetic poles are positioned on the opposing 5mm x 1.7mm faces, with the magnetisation direction running through the 3mm dimension.

What does N50 mean?

N50 identifies the magnetic energy classification of the Neodymium Iron Boron material. It does not indicate a 50kg pull force.

Are these magnets suitable for electronics?

They may be suitable for miniature electronic assemblies, sensors and magnetic switching systems where their dimensions and magnetic properties meet the design requirements.

Can these magnets be used for model making?

They may be suitable for specialist model-making applications, provided they are securely retained and kept away from children. Their small size creates a serious ingestion hazard.

Are these magnets supplied individually or in a pack?

They are supplied as a pack of 100 individual magnets.

Can these magnets be glued into a housing?

Yes, provided the adhesive is compatible with the magnet's actual coating and the finished assembly securely retains the magnets.

Are these magnets suitable for children's toys?

They should not be used in children's toys or other products where they could become accessible or detached without appropriate safety engineering and compliance assessment.

Does N50 mean 50kg pull force?

No. N50 identifies the magnetic material grade and does not indicate pull force or lifting capacity.

Related Products

Customers considering this product may also be interested in:

• Miniature Neodymium Block Magnets

• N50 Neodymium Magnets

• Small Neodymium Disc Magnets

• Neodymium Cylinder Magnets

• Precision Rare Earth Magnets

• High-Temperature Neodymium Magnets

• Custom-Made Magnets

Please Note

These Neodymium Block Magnets – 5mm x 1.7mm x 3mm | N50 | Magnetised Through 3mm are supplied in a pack of 100 individual magnets.

Each magnet measures 5mm x 1.7mm x 3mm and is manufactured from N50 grade Neodymium Iron Boron.

The magnets are magnetised through the 3mm dimension, with north and south poles located on the opposing 5mm x 1.7mm faces.

The N50 designation identifies the magnetic material grade and does not mean these magnets have a 50kg pull force.

No specific pull force, Gauss rating, coating or plating, dimensional tolerance or maximum operating temperature has been supplied.

Actual magnetic performance depends on the magnetic material, magnetisation direction, magnetic circuit, target material, target steel thickness, contact area, air gaps and installation geometry.

These miniature magnets present a serious ingestion hazard. Keep them away from children and ensure they are securely retained in finished products.

Neodymium is a hard and brittle magnetic material. Avoid impact, force-fitting, drilling, cutting, grinding or machining.

These magnets are not certified lifting equipment and should not be used for overhead or safety-critical lifting.