SmCo Block Magnet 20x11x3.3mm S280

SmCo Block Magnet – 20mm x 11mm x 3.3mm | S280

The SmCo Block Magnet – 20mm x 11mm x 3.3mm | S280 is a high-performance Samarium Cobalt (SmCo) rare earth permanent magnet designed for applications where exceptional temperature stability, corrosion resistance, and long-term magnetic reliability are essential. Manufactured from S280 grade Samarium Cobalt, this precision-engineered rectangular magnet provides consistent magnetic performance in demanding environments where conventional neodymium magnets may not be suitable.

Measuring 20mm in length, 11mm in width, and 3.3mm in thickness, this compact SmCo block magnet is ideal for precision assemblies, sensing systems, industrial automation, aerospace components, medical devices, scientific instruments, and high-temperature equipment. Despite its slim profile, the magnet delivers strong magnetic performance while maintaining excellent resistance to demagnetisation under elevated operating temperatures.

Unlike many rare earth magnets, Samarium Cobalt magnets naturally resist corrosion and oxidation, eliminating the need for nickel or epoxy coatings in most applications. This makes them an excellent choice for environments exposed to moisture, chemicals, vacuum conditions, or fluctuating temperatures where long service life and dependable performance are critical.

The magnet is axially magnetised through its 3.3mm thickness, meaning the north and south poles are located on the two largest 20mm x 11mm faces. This configuration provides a concentrated magnetic field ideal for holding, positioning, sensing, actuating, and precision engineering applications.

Whether incorporated into industrial machinery, aerospace systems, electronic devices, or custom engineering projects, the 20mm x 11mm x 3.3mm SmCo Block Magnet offers outstanding durability and reliable magnetic performance.

Key Features

• Premium S280 Samarium Cobalt (SmCo) rare earth magnet
• Dimensions: 20mm x 11mm x 3.3mm
• Axially magnetised through the 3.3mm thickness
• Excellent resistance to corrosion and oxidation
• No protective coating required under most operating conditions
• Outstanding resistance to demagnetisation
• Exceptional performance at elevated temperatures
• Long-lasting permanent magnetic strength
• Precision rectangular block design
• Suitable for industrial, commercial, and scientific applications

Common Applications

• Aerospace components
• Medical equipment
• Scientific instruments
• Industrial automation
• Precision sensors
• Electric motors
• Magnetic couplings
• Electronic assemblies
• Laboratory equipment
• High-temperature machinery

Ideal For

• Engineers
• Product designers
• OEM manufacturers
• Aerospace manufacturers
• Medical device manufacturers
• Electronics manufacturers
• Automation specialists
• Research laboratories
• Automotive engineers
• Precision engineering workshops

Why Choose a Samarium Cobalt Block Magnet?

Samarium Cobalt magnets are the preferred choice for applications requiring dependable magnetic performance in harsh environments. Their exceptional resistance to heat, corrosion, oxidation, and demagnetisation allows them to maintain consistent magnetic properties where many other permanent magnets would lose strength or deteriorate.

Unlike standard neodymium magnets, SmCo magnets naturally resist corrosion, making them suitable for use in humid environments, chemically aggressive conditions, vacuum systems, and high-temperature applications without relying on protective surface coatings.

Manufactured from S280 grade Samarium Cobalt, this block magnet delivers reliable, long-term performance in precision equipment, industrial machinery, aerospace technology, and advanced electronic systems. Its compact rectangular profile also makes it easy to integrate into assemblies where installation space is limited.

Technical Specifications

• Product Type: Samarium Cobalt (SmCo) Block Magnet
• Material: Samarium Cobalt (SmCo)
• Grade: S280
• Shape: Rectangular Block
• Length: 20mm
• Width: 11mm
• Thickness: 3.3mm
• Magnetisation: Axially Magnetised (through the 3.3mm thickness)
• Coating: None (natural corrosion-resistant material)
• Temperature Resistance: Excellent
• Corrosion Resistance: Excellent
• Reusable: Yes
• Application: Holding, positioning, sensing, coupling, actuating, and precision engineering

Please Note

Samarium Cobalt magnets are hard and brittle and should be handled carefully to prevent chipping or cracking if dropped or allowed to snap together.

Although SmCo magnets provide excellent resistance to corrosion and elevated temperatures, they should not be drilled, cut, or machined after manufacture, as this can permanently damage the magnet and generate hazardous dust.

Actual magnetic performance will vary depending on the thickness and type of the mating material, air gap, operating temperature, alignment, and overall application design.

Keep this magnet away from pacemakers, medical implants, magnetic storage media, and sensitive electronic equipment. Exercise caution when handling multiple magnets, as they can attract each other with considerable force and may cause pinch injuries or damage if allowed to collide.