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MPL 40x20x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020158

GTIN: 5906301811640

length [±0,1 mm]

40 mm

Width [±0,1 mm]

20 mm

Height [±0,1 mm]

10 mm

Weight

60 g

Magnetization Direction

↑ axial

Load capacity

22.34 kg / 219.08 N

Magnetic Induction

349.60 mT

Coating

[NiCuNi] nickel

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MPL 40x20x10 / N38 - lamellar magnet

Specification/characteristics MPL 40x20x10 / N38 - lamellar magnet

properties

values

Cat. no.

020158

GTIN

5906301811640

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

40 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

60 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

22.34 kg / 219.08 N

Magnetic Induction ~ ?

349.60 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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Flat neodymium magnets min. MPL 40x20x10 / N38 are magnets made from neodymium in a rectangular form. They are appreciated for their extremely powerful magnetic properties, which outshine ordinary iron magnets.
Thanks to their high strength, flat magnets are regularly used in products that require exceptional adhesion.
The standard temperature resistance of flat magnets is 80°C, but depending on the dimensions, this value rises.
In addition, flat magnets often have different coatings applied to their surfaces, e.g. nickel, gold, or chrome, to improve their strength.
The magnet named MPL 40x20x10 / N38 i.e. a magnetic force 22.34 kg weighing just 60 grams, making it the ideal choice for applications requiring a flat shape.

Neodymium flat magnets present a range of advantages compared to other magnet shapes, which make them being the best choice for various uses:
Contact surface: Due to their flat shape, flat magnets ensure a larger contact surface with other components, which can be beneficial in applications requiring a stronger magnetic connection.
Technology applications: They are often used in different devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is necessary for their operation.
Mounting: The flat form's flat shape makes it easier mounting, especially when it is required to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits designers greater flexibility in arranging them in structures, which can be more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of the flat magnet may offer better stability, reducing 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, are more appropriate.

How do magnets work? Magnets attract ferromagnetic materials, such as iron, nickel, materials with cobalt or alloys of metals with magnetic properties. Moreover, magnets may weaker affect some other metals, such as steel. Magnets are used in many fields.

The operation of magnets is based on the properties of the magnetic field, which is generated by the movement of electric charges within their material. The magnetic field of these objects creates attractive interactions, which affect objects made of iron or other magnetic materials.

Magnets have two poles: north (N) and south (S), which attract each other when they are oppositely oriented. Poles of the same kind, such as two north poles, act repelling on each other.
Thanks to this principle of operation, magnets are regularly used in electrical devices, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength of attraction, making them ideal for applications requiring strong magnetic fields. Moreover, the strength of a magnet depends on its dimensions and the material it is made of.

Not all materials react to magnets, and examples of such substances are plastics, glass items, wooden materials or most gemstones. Furthermore, magnets do not affect most metals, such as copper, aluminum materials, 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’s worth noting 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 once this temperature is exceeded, the magnet stops being magnetic. Interestingly, strong magnets can interfere with the operation of devices, such as compasses, credit cards and even medical equipment, like pacemakers. For this reason, it is important to exercise caution when using magnets.

A neodymium magnet of class N50 and N52 is a powerful and highly strong magnetic piece with the shape of a plate, that provides high force and versatile application. Competitive price, 24h delivery, durability and universal usability.

Advantages and disadvantages of neodymium magnets NdFeB.

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

Their magnetic field is maintained, and after around 10 years, it drops only by ~1% (according to research),
They protect against demagnetization induced by surrounding electromagnetic environments remarkably well,
Thanks to the glossy finish and silver coating, they have an elegant appearance,
Magnetic induction on the surface of these magnets is notably high,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
With the option for customized forming and personalized design, these magnets can be produced in various shapes and sizes, greatly improving engineering flexibility,
Significant impact in advanced technical fields – they are utilized in data storage devices, electromechanical systems, healthcare devices as well as other advanced devices,
Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of NdFeB magnets:

They can break when subjected to a heavy impact. If the magnets are exposed to physical collisions, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture and increases its overall robustness,
High temperatures may significantly reduce the holding force of neodymium magnets. Typically, above 80°C, they experience permanent weakening in performance (depending on shape). 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,
Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of protective material for outdoor use,
Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing threads directly in the magnet,
Safety concern due to small fragments may arise, in case of ingestion, which is significant in the family environments. Moreover, miniature parts from these products may complicate medical imaging if inside the body,
Higher purchase price is one of the drawbacks compared to ceramic magnets, especially in budget-sensitive applications

Be Cautious with Neodymium Magnets

Neodymium magnets should not be around youngest children.

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 attract to each other, pinch the skin, and cause significant swellings.

Magnets will crack or crumble with uncontrolled joining to each other. You can't move them to each other. At a distance less than 10 cm you should have them very firmly.

Do not bring neodymium magnets close to GPS and smartphones.

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.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Neodymium magnets are the strongest magnets ever created, and their power can surprise you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional damage to the magnets.

Neodymium magnets are noted for being fragile, which can cause them to shatter.

Neodymium magnets are characterized by considerable fragility. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

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

Studies show a small percentage of people have allergies to certain metals, including 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.

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, or other devices. They can also damage devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Caution!

To illustrate why neodymium magnets are so dangerous, see the article - How very dangerous are very powerful neodymium magnets?.