Round Neodymium Disc Magnet 4 x 2mm

The 4 x 2mm N38 Neodymium Disc Magnet is a compact yet powerful rare earth permanent magnet, ideal for applications requiring reliable magnetic strength in a small space. Manufactured from high-quality Neodymium Iron Boron (NdFeB), this miniature round magnet offers excellent magnetic performance, making it suitable for electronics, sensors, DIY projects, crafts and precision applications.

Measuring just 4mm in diameter and 2mm in thickness, this N38 grade magnet delivers a rated pulling force of 312g under ideal conditions. Its small size makes it particularly useful for projects where space is limited but a strong magnetic connection is required.

The magnet features a triple-layer Nickel-Copper-Nickel (Ni-Cu-Ni) coating, providing a smooth silver finish and improved resistance to corrosion under normal indoor conditions. With a maximum operating temperature of 80°C, it is suitable for a wide range of everyday electronic, industrial and hobby applications.

Key Features

• Compact and Powerful: Miniature 4 x 2mm disc magnet with a rated pulling force of 312g.

• N38 Grade Neodymium: Strong rare earth magnet offering excellent magnetic performance for its size.

• Nickel-Plated Finish: Triple-layer Ni-Cu-Ni coating for improved corrosion resistance and durability.

• Permanent Magnet: Maintains its magnetic properties without requiring an external power source.

• Axial Magnetisation: Magnetic poles are located on the two flat circular faces.

• Space-Saving Design: Ideal for small electronic devices, miniature assemblies and precision projects.

• Versatile Applications: Suitable for sensors, magnetic closures, crafts, model making and DIY projects.

Product Specifications

• Magnet Type: Neodymium Rare Earth Magnet (NdFeB)

• Grade: N38

• Shape: Round / Disc

• Diameter: 4mm

• Thickness: 2mm

• Dimensions: 4 x 2mm

• Pulling Force: 312g (rated)

• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni)

• Colour: Silver

• Magnetisation Direction: Axial (through the thickness)

• Maximum Operating Temperature: 80°C

• Dimensional Tolerance: ±0.1mm

• Quantity: 1 Piece

Applications

The 4 x 2mm neodymium disc magnet is suitable for a variety of small-scale electronic, industrial and hobby applications, including:

• Electronics: Magnetic sensors, reed switches and compact electronic assemblies.

• DIY and Hobby Projects: Miniature magnetic mounts, custom gadgets and small prototypes.

• 3D Printing Projects: Embedded magnets for printed enclosures, removable covers and snap-fit magnetic assemblies.

• Model Making: Scale models, miniature components and magnetic attachments.

• Arts and Crafts: Handmade decorations, jewellery projects and small magnetic closures.

• Magnetic Closures: Small boxes, packaging, lightweight covers and miniature compartments.

• Educational Projects: Magnetic experiments, demonstrations and STEM learning activities.

• Precision Applications: Small magnetic positioning, holding and triggering mechanisms.

Important Handling and Safety Information

• Neodymium magnets are strong for their size and should be handled carefully.

• These magnets are brittle and may crack, chip or shatter if dropped or allowed to collide forcefully.

• Do not drill, cut, grind or machine neodymium magnets.

• Avoid prolonged exposure to moisture, particularly if the nickel coating becomes damaged.

• Do not expose the magnet to temperatures above 80°C, as this may cause permanent loss of magnetic strength.

• Keep away from pacemakers and sensitive electronic equipment.

• Warning: This small magnet presents a serious swallowing hazard. Keep away from children and pets. Swallowed magnets can cause severe internal injuries and require immediate medical attention.

Please Note: The rated pulling force of 312g is measured under ideal direct-pull conditions against a suitable flat steel surface. Actual holding strength may vary depending on the mounting surface, material thickness, air gap and pulling direction.

Package Includes: 1 x Round Neodymium Disc Magnet 4 x 2mm – N38.