20x10x3mm Mini Square Block Heavy Duty Neodymium Magnets

20x10x3mm Mini Square Block Heavy Duty Neodymium Magnet Overview

The 20x10x3mm Mini Square Block Heavy Duty Neodymium Magnet is a compact, high-strength permanent magnet manufactured from premium neodymium-iron-boron (NdFeB). Its rectangular block shape and large surface area deliver exceptional holding force and stable alignment in space-restricted designs. These magnets are engineered for demanding applications in electronics, robotics, hobby projects, and precision mounting.

Key Features of the 20x10x3mm Neodymium Magnet

• High magnetic strength: Made from high-grade NdFeB material offering much stronger attraction than ferrite or ceramic magnets of similar size.
• Rectangular block design: 20 mm × 10 mm surface with 3 mm thickness for improved surface contact and holding stability.
• Uniform magnetization: Axially magnetized to provide consistent performance across the contact area.
• Durable nickel coating: Ni-Cu-Ni plating enhances corrosion resistance and extends service life.
• Heavy duty performance: Built to handle repeated holding, fixing, and alignment tasks.

Technical Specifications

• Type: Neodymium Magnet (NdFeB)
• Shape: Square / Rectangular Block
• Dimensions: 20 mm × 10 mm × 3 mm
• Magnetization: Axially magnetized
• Coating: Nickel (Ni-Cu-Ni)
• Grade: Heavy Duty / High Strength
• Color: Silver
• Operating Temperature: Typically up to 80 °C

Applications for 20x10x3mm Mini Square Magnets

• Electronics and PCB mounting
• Robotics and automation assemblies
• DIY and hobby projects
• Craft, art, and model making
• Magnetic closures, holders, and fixtures
• Educational experiments and demonstrations
• Precision alignment and positioning applications

Advantages

• Strong magnetic pull within a compact rectangular profile
• Large surface area for improved holding stability
• Corrosion-resistant Ni-Cu-Ni finish for long-term durability
• Easy integration into compact, low-profile designs

Safety and Handling

• Handle carefully; strong attraction may cause magnets to snap together and pinch skin.
• Keep away from children and magnetic-sensitive devices such as pacemakers, credit cards, and hard drives.
• Avoid exposure to temperatures above the rated operating temperature, drilling, or mechanical impact which can demagnetize or damage the magnet.

Installation Tips

• Use adhesives or mechanical fasteners when permanent mounting is required. Select adhesives compatible with nickel plating.
• Account for magnetic force when positioning near ferrous components to prevent sudden movement during assembly.
• Test magnet polarity and strength in a prototype environment before final installation.

Ordering and Availability

Available in single units or bulk quantities. Contact our sales team for volume pricing and lead times for custom grades or coatings.

Why Choose These Mini Square Neodymium Magnets

These 20x10x3mm neodymium magnets combine compact dimensions with heavy duty magnetic performance, making them an excellent choice when high holding power and precise alignment are required in tight spaces. They offer a cost effective solution for engineers, makers, and hobbyists who need reliable, long-lasting magnetic components.

Note: Images are for illustration purposes only. Actual product size and appearance may vary slightly.