Neodymium Block Magnet - 12mm x 4mm x 6mm | N48M | Epoxy Coated | High Temperature ≤100ºC
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Neodymium Block Magnet – 12mm x 4mm x 6mm | N48M | Epoxy Coated | High Temperature
The Neodymium Block Magnet – 12mm x 4mm x 6mm | N48M | Epoxy Coated is a high-performance rare earth permanent magnet engineered for applications requiring strong magnetic performance, enhanced corrosion protection and reliable operation at temperatures up to 100°C. Manufactured from N48M grade neodymium iron boron (NdFeB), this compact rectangular magnet combines high magnetic energy with improved thermal stability compared with standard neodymium grades.
Measuring 12mm x 4mm x 6mm, this precision block magnet is suitable for industrial equipment, electronics, sensors, automation systems, robotics, manufacturing and custom OEM assemblies. Its compact rectangular shape makes it easy to integrate into recessed housings, fixtures and precision-engineered components where installation space is limited.
The N48M high-temperature grade provides excellent magnetic strength while offering improved resistance to irreversible magnetic losses at elevated temperatures. With a specified maximum operating temperature of up to 100°C, this magnet is particularly suitable for applications exposed to moderate heat from motors, machinery, electronics or industrial processes.
Unlike conventional nickel-plated neodymium magnets, this model features a protective epoxy coating. The epoxy layer provides enhanced resistance to moisture and corrosion, making it a practical choice for applications where additional environmental protection is required.
Key Features
- High-performance N48M grade neodymium rare earth magnet
- Dimensions: 12mm x 4mm x 6mm
- Maximum operating temperature: ≤100°C
- High-temperature M-grade neodymium material
- Protective epoxy coating
- Enhanced resistance to moisture and corrosion
- Compact rectangular block design
- Excellent magnetic strength-to-size ratio
- Permanent rare earth magnet
- Suitable for industrial, commercial and precision engineering applications
Common Applications
- Industrial automation
- Electric motors
- Magnetic sensors
- Robotics
- Electronics
- Magnetic holding and positioning
- Manufacturing equipment
- Precision instruments
- Product development
- Custom OEM assemblies
Why Choose an N48M High Temperature Neodymium Magnet?
N48M neodymium combines high magnetic energy with improved temperature resistance. The N48 designation indicates a high-energy magnetic grade, while the M temperature classification makes the material better suited to elevated-temperature applications than equivalent standard-grade neodymium magnets.
This magnet has a specified operating temperature of up to 100°C, making it suitable for equipment where heat is generated during normal operation. Potential applications include motors, sensors, actuators, automation systems and electronic assemblies where both compact size and strong magnetic performance are important.
Operating temperature should always be considered as part of the complete magnetic circuit. Factors such as magnet geometry, surrounding materials and application conditions can influence thermal performance.
Benefits of an Epoxy Coated Neodymium Magnet
The epoxy coating provides an additional protective barrier between the NdFeB magnetic material and the surrounding environment. Neodymium magnets are naturally susceptible to corrosion if their protective surface is compromised, so an epoxy finish can be particularly valuable in applications where moisture or environmental exposure is a concern.
The coating also makes this magnet a useful alternative to conventional nickel-coated magnets for specialised equipment, enclosed assemblies and products where enhanced corrosion resistance is desirable.
The epoxy coating should still be protected from scratching, abrasion and impact, as damage to the protective layer may expose the underlying magnetic material.
Technical Specifications
- Product Type: Neodymium Block Magnet
- Material: Neodymium Iron Boron (NdFeB)
- Magnet Grade: N48M
- Temperature Classification: High Temperature
- Maximum Operating Temperature: ≤100°C
- Shape: Rectangular Block
- Dimensions: 12mm x 4mm x 6mm
- Coating: Epoxy
- Magnet Type: Permanent Rare Earth Magnet
- Typical Applications: Holding, positioning, sensing, automation, motors, electronics, manufacturing and high-temperature engineering applications
Industrial and Engineering Applications
The combination of N48M magnetic strength, compact 12mm x 4mm x 6mm dimensions, epoxy protection and a ≤100°C operating temperature makes this magnet a versatile component for engineers, manufacturers and product designers.
Its rectangular profile can be incorporated into purpose-built housings, channels and recessed mounting points. For permanent installations, the magnet may be bonded using an adhesive compatible with both the epoxy coating and the surrounding substrate.
Avoid press-fitting the magnet into undersized cavities, as neodymium magnets are hard but brittle and may fracture when subjected to excessive mechanical stress.
Please Note
The 100°C maximum operating temperature should not be exceeded. Exposure to temperatures above the magnet's specified operating limit may result in irreversible loss of magnetic performance.
Neodymium magnets are extremely powerful for their size and should always be handled carefully. Strong attraction to steel or other magnets can create pinch hazards and may cause the brittle magnet to chip or break if allowed to collide.
Actual magnetic holding performance depends on factors including the mating material, steel thickness, contact area, surface condition, air gap, operating temperature and direction of force. Paint, coatings, adhesive layers and other gaps will reduce effective magnetic strength.
Do not drill, cut, machine or weld neodymium magnets. Protect the epoxy coating from scratches and abrasion to maintain its corrosion-resistant properties.
Keep strong magnets away from children, pacemakers, medical implants, magnetic storage media and sensitive electronic equipment.
Typical Physical Properties
NB: Ranges are indicative for product category, please check individual products for specic values within that range.
Production Flow Diagram
Demagnetization Curves
Surface Treatment
The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.
Range and Tolerance
Magnets are readily available in Blocks, Discs, Cylinders & Rings. We specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.
Magnetic Properties
Neodymium magnets are offered in several different grades. The first section N30-54 has an operating temperature of up to 80 degrees. Most of our stock only goes up to N38. The second section, denoted with the "M" prefix after the grade has an operating temperature 100 degrees. After this the grades are "H", "SH", "UH" & "EH". In order for the magnet to withstand a higher operating temperature, during production more of the raw material PrNd is incorporated as these elements have a naturally occurring resistance to high temperatures.
Returns Policy
If you are not entirely satisfied with your purchase, we're here to help.
We have a 30 Day Returns policy at Frenergy Magnets. You may return your item within 30 days of receiving it to receive a refund.
The product/s must be unused and in the same condition you received them in. Please contact us at info@frenergy.com.au to initiate the returns process.
The buyer is responsible for the cost of returning the order.
