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MPL 20x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020132

GTIN: 5906301811381

length [±0,1 mm]

20 mm

Width [±0,1 mm]

5 mm

Height [±0,1 mm]

5 mm

Weight

3.75 g

Magnetization Direction

↑ axial

Load capacity

3.95 kg / 38.74 N

Magnetic Induction

456.78 mT

Coating

[NiCuNi] nickel

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2.24 ZŁ net + 23% VAT / pcs

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MPL 20x5x5 / N38 - lamellar magnet

Specification/characteristics MPL 20x5x5 / N38 - lamellar magnet

properties

values

Cat. no.

020132

GTIN

5906301811381

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

20 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

3.75 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

3.95 kg / 38.74 N

Magnetic Induction ~ ?

456.78 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 20x5x5 / N38 are magnets made from neodymium in a rectangular form. They are valued for their extremely powerful magnetic properties, which surpass standard ferrite magnets.
Thanks to their high strength, flat magnets are commonly applied in products that require exceptional adhesion.
The standard temperature resistance of these magnets is 80 °C, but with larger dimensions, this value rises.
Additionally, flat magnets often have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, to improve their durability.
The magnet with the designation MPL 20x5x5 / N38 and a magnetic strength 3.95 kg with a weight of just 3.75 grams, making it the excellent choice for projects needing a flat magnet.

Neodymium flat magnets provide a range of advantages compared to other magnet shapes, which cause them being the best choice for many applications:
Contact surface: Due to their flat shape, flat magnets ensure a larger contact surface with adjacent parts, which can be beneficial in applications requiring a stronger magnetic connection.
Technology applications: These magnets are often used in various devices, such as sensors, stepper motors, or speakers, where the flat shape is crucial for their operation.
Mounting: The flat form's flat shape makes mounting, particularly when it is required to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits creators greater flexibility in placing them in structures, which is more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of the flat magnet may provide better stability, minimizing the risk of shifting or rotating. However, it's important to note that the optimal shape of the magnet is dependent on the specific application and requirements. In some cases, other shapes, like cylindrical or spherical, are more appropriate.

Magnets attract objects made of ferromagnetic materials, such as iron, nickel, materials with cobalt and alloys of metals with magnetic properties. Moreover, magnets may lesser affect some other metals, 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. The magnetic field of magnets creates attractive forces, which attract materials containing cobalt or other ferromagnetic substances.

Magnets have two poles: north (N) and south (S), which attract each other when they are oppositely oriented. Similar poles, e.g. two north poles, act repelling on each other.
Due to these properties, magnets are regularly used in magnetic technologies, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength of attraction, making them indispensable for applications requiring strong magnetic fields. Additionally, 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, wooden materials and precious stones. Moreover, magnets do not affect most metals, such as copper items, aluminum, copper, aluminum, and gold. These metals, although they are conductors of 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. 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 or medical equipment, like pacemakers. For this reason, it is important to avoid placing magnets near such devices.

A neodymium plate magnet with classification N50 and N52 is a powerful and highly strong magnetic product designed as a plate, providing strong holding power and broad usability. Very good price, 24h delivery, resistance and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their remarkable magnetic power, neodymium magnets offer the following advantages:

Their magnetic field remains stable, and after approximately ten years, it drops only by ~1% (according to research),
Their ability to resist magnetic interference from external fields is among the best,
Because of the lustrous layer of gold, the component looks high-end,
They have exceptional magnetic induction on the surface of the magnet,
Neodymium magnets are known for very high 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 specific requirements, neodymium magnets can be created in different geometries, which increases their application range,
Important function in modern technologies – they find application in hard drives, electric motors, medical equipment as well as high-tech tools,
Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in compact dimensions, which allows for use in compact constructions

Disadvantages of rare earth magnets:

They may fracture when subjected to a sudden 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 reinforces its overall robustness,
Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (influenced by the magnet’s structure). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
They rust in a wet environment. If exposed to rain, we recommend using sealed magnets, such as those made of rubber,
Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing threads directly in the magnet,
Health risk due to small fragments may arise, in case of ingestion, which is significant in the context of child safety. It should also be noted that tiny components from these products can interfere with diagnostics once in the system,
High unit cost – neodymium magnets are pricier than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Handle Neodymium Magnets Carefully

The magnet coating contains nickel, so be cautious 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

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

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Magnets made of neodymium are incredibly fragile, they easily crack as well as can crumble.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of connection between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Dust and powder from neodymium magnets are highly flammable.

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

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere 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.

Neodymium magnets can demagnetize at high temperatures.

Although magnets are generally resilient, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Avoid bringing neodymium magnets close to a phone or GPS.

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

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

Familiarize yourself with our information to properly handle these magnets and avoid significant injuries to your body and prevent disruption to the magnets.

Neodymium magnets are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

If the joining of neodymium magnets is not under control, then they may crumble and also crack. Remember not to approach them to each other or have them firmly in hands at a distance less than 10 cm.

Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.

Strong 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. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Pay attention!

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