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MPL 25x10x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020387

GTIN: 5906301811862

length [±0,1 mm]

25 mm

Width [±0,1 mm]

10 mm

Height [±0,1 mm]

3 mm

Weight

5.63 g

Magnetization Direction

↑ axial

Load capacity

3.75 kg / 36.77 N

Magnetic Induction

230.69 mT

Coating

[NiCuNi] nickel

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2.90 ZŁ net + 23% VAT / pcs

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MPL 25x10x3 / N38 - lamellar magnet

Specification/characteristics MPL 25x10x3 / N38 - lamellar magnet

properties

values

Cat. no.

020387

GTIN

5906301811862

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

25 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

5.63 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

3.75 kg / 36.77 N

Magnetic Induction ~ ?

230.69 mT

Coating

[NiCuNi] nickel

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N38

properties

values

units

coercivity bHc ?

860-915

kA/m

coercivity bHc ?

10.8-11.5

kOe

energy density [Min. - Max.] ?

287-303

BH max KJ/m

energy density [Min. - Max.] ?

36-38

BH max MGOe

remenance Br [Min. - Max.] ?

12.2-12.6

kGs

remenance Br [Min. - Max.] ?

1220-1260

actual internal force iHc

≥ 955

kA/m

actual internal force iHc

≥ 12

kOe

max. temperature ?

≤ 80

°C

Physical properties of NdFeB

properties

values

units

Vickers hardness

≥550

Density

≥7.4

g/cm³

Curie Temperature TC

312 - 380

°C

Curie Temperature TF

593 - 716

°F

Specific resistance

150

μΩ⋅Cm

Bending strength

250

Mpa

Compressive strength

1000~1100

Mpa

Thermal expansion parallel (∥) to orientation (M)

(3-4) x 106

°C^-1

Thermal expansion perpendicular (⊥) to orientation (M)

-(1-3) x 10-6

°C^-1

Young's modulus

1.7 x 104

kg/mm²

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Neodymium flat magnets min. MPL 25x10x3 / N38 are magnets created from neodymium in a flat form. They are known for their exceptionally potent magnetic properties, which outshine standard ferrite magnets.
Due to their strength, flat magnets are regularly applied in structures that require very strong attraction.
Typical temperature resistance of flat magnets is 80°C, but depending on the dimensions, this value grows.
In addition, flat magnets often have different coatings applied to their surfaces, e.g. nickel, gold, or chrome, to improve their durability.
The magnet with the designation MPL 25x10x3 / N38 and a lifting capacity of 3.75 kg weighing a mere 5.63 grams, making it the ideal choice for applications requiring a flat shape.

Neodymium flat magnets present a range of advantages versus other magnet shapes, which make them being the best choice for many applications:
Contact surface: Due to their flat shape, flat magnets guarantee a larger contact surface with other components, which is beneficial in applications needing a stronger magnetic connection.
Technology applications: They are often used in many devices, e.g. sensors, stepper motors, or speakers, where the flat shape is crucial for their operation.
Mounting: The flat form's flat shape makes mounting, especially when there's a need to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets gives the possibility creators greater flexibility in placing them in devices, which can be more difficult with magnets of more complex shapes.
Stability: In some applications, the flat base of the flat magnet can provide better stability, minimizing the risk of sliding or rotating. However, it's important to note that the optimal shape of the magnet depends on the specific project and requirements. In certain cases, other shapes, such as cylindrical or spherical, may be more appropriate.

Magnets attract objects made of ferromagnetic materials, such as iron, objects containing nickel, cobalt or special alloys of ferromagnetic metals. Moreover, magnets may lesser affect alloys containing iron, such as steel. Magnets are used in many fields.

Magnets work thanks to the properties of their magnetic field, which arises from the ordered movement of electrons in their structure. The magnetic field of magnets creates attractive forces, which attract materials containing nickel or other magnetic materials.

Magnets have two poles: north (N) and south (S), which interact with each other when they are oppositely oriented. Similar poles, such as two north poles, act repelling on each other.
Thanks to this principle of operation, magnets are commonly used in electrical devices, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the highest power of attraction, making them indispensable for applications requiring strong magnetic fields. Additionally, the strength of a magnet depends on its dimensions and the materials used.

Not all materials react to magnets, and examples of such substances are plastics, glass items, wood and precious stones. Furthermore, magnets do not affect most metals, such as copper, aluminum materials, items made of gold. Although these metals conduct electricity, do not exhibit ferromagnetic properties, meaning that they do not respond to a standard magnetic field, unless exposed to a very strong magnetic field.
It should be noted that extremely high temperatures, above the Curie point, cause a loss of magnetic properties in the magnet. The Curie temperature is specific to each type of magnet, meaning that under such conditions, the magnet stops being magnetic. Interestingly, strong magnets can interfere with the operation of devices, such as navigational instruments, credit cards and even medical equipment, like pacemakers. Therefore, it is important to exercise caution when using magnets.

A neodymium magnet in classes N52 and N50 is a powerful and strong metal object shaped like a plate, providing strong holding power and broad usability. Competitive price, availability, stability and universal usability.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after 10 years, the decline in efficiency is only ~1% (according to literature),
They show superior resistance to demagnetization from external magnetic fields,
Thanks to the polished finish and nickel coating, they have an visually attractive appearance,
They exhibit superior levels of magnetic induction near the outer area of the magnet,
Neodymium magnets are known for exceptionally strong magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the shape),
Thanks to the freedom in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in different geometries, which broadens their application range,
Wide application in new technology industries – they are utilized in data storage devices, electromechanical systems, diagnostic apparatus as well as other advanced devices,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in compact dimensions, which makes them ideal in miniature devices

Disadvantages of neodymium magnets:

They can break when subjected to a heavy impact. If the magnets are exposed to shocks, it is suggested to place them in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks and additionally enhances its overall durability,
High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on form). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
Magnets exposed to wet conditions can rust. Therefore, for outdoor applications, it's best to use waterproof types made of rubber,
Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing fine shapes directly in the magnet,
Possible threat related to magnet particles may arise, when consumed by mistake, which is important in the health of young users. It should also be noted that small elements from these devices may disrupt scanning when ingested,
Higher purchase price is one of the drawbacks compared to ceramic magnets, especially in budget-sensitive applications

Safety Precautions

Neodymium magnets are the strongest, most remarkable magnets on the planet, and the surprising force between them can surprise you at first.

Familiarize yourself with our information to correctly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.

Neodymium magnets can attract to each other, pinch the skin, and cause significant injuries.

Magnets attract each other within a distance of several to around 10 cm from each other. Remember not to insert fingers between magnets or in their path when attract. Magnets, depending on their size, are able even cut off a finger or alternatively there can be a severe pressure or even a fracture.

Avoid contact with neodymium magnets if you have a nickel allergy.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Avoid bringing neodymium magnets close to a phone or GPS.

Neodymium magnets are a source of strong magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

People with pacemakers are advised to avoid neodymium magnets.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Magnets are not toys, children should not play with them.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets can become demagnetized at high temperatures.

Despite the fact that magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

Neodymium magnetic are extremely fragile, resulting in their cracking.

Magnets made of neodymium are highly delicate, and by joining them in an uncontrolled manner, they will crack. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. At the moment of collision between the magnets, small metal fragments can be dispersed in different directions.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Exercise caution!

To show why neodymium magnets are so dangerous, read the article - How very dangerous are strong neodymium magnets?.