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MPL 25x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020135

GTIN: 5906301811411

length [±0,1 mm]

25 mm

Width [±0,1 mm]

10 mm

Height [±0,1 mm]

5 mm

Weight

9.38 g

Magnetization Direction

↑ axial

Load capacity

6.24 kg / 61.19 N

Magnetic Induction

337.05 mT

Coating

[NiCuNi] nickel

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MPL 25x10x5 / N38 - lamellar magnet

Specification/characteristics MPL 25x10x5 / N38 - lamellar magnet

properties

values

Cat. no.

020135

GTIN

5906301811411

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

5 mm [±0,1 mm]

Weight

9.38 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

6.24 kg / 61.19 N

Magnetic Induction ~ ?

337.05 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 i.e. MPL 25x10x5 / N38 are magnets created from neodymium in a flat form. They are valued for their extremely powerful magnetic properties, which are much stronger than ordinary ferrite magnets.
Due to their power, flat magnets are regularly used in products that need very strong attraction.
The standard temperature resistance of these magnets is 80°C, but depending on the dimensions, this value grows.
In addition, flat magnets commonly have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, to increase their durability.
The magnet with the designation MPL 25x10x5 / N38 i.e. a lifting capacity of 6.24 kg which weighs a mere 9.38 grams, making it the excellent choice for applications requiring a flat shape.

Neodymium flat magnets offer a range of advantages versus other magnet shapes, which make them being an ideal choice for many applications:
Contact surface: Thanks to their flat shape, flat magnets guarantee a larger contact surface with other components, which can be beneficial in applications requiring a stronger magnetic connection.
Technology applications: These are often applied in various devices, e.g. sensors, stepper motors, or speakers, where the thin and wide shape is necessary for their operation.
Mounting: Their flat shape makes it easier mounting, especially when there's a need to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets gives the possibility designers greater flexibility in arranging them in devices, which is more difficult with magnets of more complex shapes.
Stability: In some applications, the flat base of the flat magnet may offer better stability, minimizing the risk of shifting or rotating. However, one should remember that the optimal shape of the magnet is dependent on the specific project and requirements. In some cases, other shapes, such as cylindrical or spherical, are more appropriate.

Attracted by magnets are objects made of ferromagnetic materials, such as iron elements, objects containing nickel, cobalt or alloys of metals with magnetic properties. Moreover, magnets may weaker affect alloys containing iron, such as steel. Magnets are used in many fields.

Magnets work thanks to the properties of their magnetic field, which is generated by the movement of electric charges within their material. Magnetic fields of magnets creates attractive interactions, which attract materials containing iron or other magnetic materials.

Magnets have two main 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.
Due to these properties, magnets are commonly used in electrical devices, e.g. motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength of attraction, making them perfect for applications requiring strong magnetic fields. Additionally, the strength of a magnet depends on its size and the material it is made of.

Not all materials react to magnets, and examples of such substances are plastic, glass, wooden materials and most gemstones. Additionally, magnets do not affect certain metals, such as copper items, aluminum, items made of gold. These metals, although they are conductors of electricity, do not exhibit ferromagnetic properties, meaning that they remain unaffected by a magnet, unless they are subjected to an extremely strong magnetic field.
It’s worth noting that extremely high temperatures, above the Curie point, cause a loss of magnetic properties in the magnet. Every magnetic material has its Curie point, meaning that under such conditions, the magnet stops being magnetic. Additionally, strong magnets can interfere with the operation of devices, such as navigational instruments, credit cards and even electronic devices sensitive to magnetic fields. Therefore, it is important to exercise caution when using magnets.

A flat magnet N50 and N52 is a powerful and strong magnetic product shaped like a plate, providing strong holding power and universal applicability. Attractive price, 24h delivery, durability and universal usability.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their pulling strength, neodymium magnets provide the following advantages:

They do not lose their power nearly 10 years – the loss of strength is only ~1% (according to tests),
They show superior resistance to demagnetization from external field exposure,
In other words, due to the glossy nickel coating, the magnet obtains an aesthetic appearance,
They possess intense magnetic force measurable at the magnet’s surface,
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 tailored forming and precise design, these magnets can be produced in various shapes and sizes, greatly improving engineering flexibility,
Important function in new technology industries – they are utilized in computer drives, rotating machines, clinical machines and technologically developed systems,
Compactness – despite their small size, they provide high effectiveness, making them ideal for precision applications

Disadvantages of rare earth magnets:

They are fragile when subjected to a heavy impact. If the magnets are exposed to physical collisions, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks , and at the same time strengthens its overall resistance,
They lose magnetic force at high temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the dimensions and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
They rust in a wet environment. For outdoor use, we recommend using waterproof magnets, such as those made of non-metallic materials,
Using a cover – such as a magnetic holder – is advised due to the limitations in manufacturing complex structures directly in the magnet,
Safety concern linked to microscopic shards may arise, in case of ingestion, which is significant in the protection of children. Moreover, miniature parts from these assemblies might complicate medical imaging if inside the body,
High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications

Handle with Care: Neodymium Magnets

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

The magnet is coated with nickel. Therefore, exercise caution if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

In the case of placing a finger in the path of a neodymium magnet, in such a case, a cut or a fracture may occur.

Neodymium magnets are incredibly delicate, they easily fall apart as well as can crumble.

Neodymium magnets are characterized by significant fragility. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

You should maintain neodymium magnets at a safe distance from the wallet, computer, and TV.

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Neodymium magnets can become demagnetized at high temperatures.

In certain circumstances, Neodymium magnets can lose their magnetism when subjected to high temperatures.

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

Neodymium magnets are not toys. Do not allow children to play with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their power can shock you.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Be careful!

In order to show why neodymium magnets are so dangerous, read the article - How very dangerous are very powerful neodymium magnets?.