MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

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MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

lamellar magnet

Catalog no 020159

GTIN: 5906301811657

length [±0,1 mm]

40 mm

Width [±0,1 mm]

20 mm

Height [±0,1 mm]

4 mm

Weight

24 g

Magnetization Direction

↑ axial

Load capacity

8.93 kg / 87.57 N

Magnetic Induction

168.28 mT

Coating

[NiCuNi] nickel

17.96 ZŁ with VAT / pcs + price for transport

14.60 ZŁ net + 23% VAT / pcs

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MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Specification/characteristics MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

properties

values

Cat. no.

020159

GTIN

5906301811657

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

4 mm [±0,1 mm]

Weight

24 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

8.93 kg / 87.57 N

Magnetic Induction ~ ?

168.28 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 40x20x4x2[7/3.5] / N38 are magnets made from neodymium in a rectangular form. They are valued for their exceptionally potent magnetic properties, which are much stronger than traditional iron magnets.
Due to their strength, flat magnets are regularly applied in devices that require very strong attraction.
Most common temperature resistance of these magnets is 80 °C, but with larger dimensions, this value grows.
Moreover, flat magnets commonly have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, for enhancing their strength.
The magnet named MPL 40x20x4x2[7/3.5] / N38 and a lifting capacity of 8.93 kg with a weight of just 24 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 lead to them being an ideal choice for a multitude of projects:
Contact surface: Due to their flat shape, flat magnets guarantee a larger contact surface with other components, which is beneficial in applications requiring a stronger magnetic connection.
Technology applications: They are often used in many devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is important for their operation.
Mounting: Their flat shape simplifies mounting, especially when it is necessary to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits designers a lot of 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, reducing the risk of shifting or rotating. It’s important to keep in mind that the optimal shape of the magnet depends on the specific application and requirements. In some cases, other shapes, like cylindrical or spherical, may be a better choice.

Attracted by magnets are ferromagnetic materials, such as iron elements, nickel, materials with cobalt or special alloys of ferromagnetic metals. Moreover, magnets may weaker affect alloys containing iron, such as steel. It’s worth noting that magnets are utilized in various devices and technologies.

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

Magnets have two main poles: north (N) and south (S), which interact with each other when they are oppositely oriented. Similar poles, such as two north poles, repel 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 highest power of attraction, making them perfect 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 plastic, glass items, wooden materials or most gemstones. Moreover, magnets do not affect most metals, such as copper items, aluminum materials, items made of 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 they are subjected to an extremely strong magnetic field.
It’s worth noting that high temperatures can weaken the magnet's effect. 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 magnet of class N52 and N50 is a strong and extremely powerful metallic component designed as a plate, featuring strong holding power and universal applicability. Good price, fast shipping, resistance and multi-functionality.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their tremendous field intensity, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years, the performance loss is only ~1% (in laboratory conditions),
Their ability to resist magnetic interference from external fields is notable,
Thanks to the glossy finish and nickel coating, they have an visually attractive appearance,
Magnetic induction on the surface of these magnets is very strong,
With the right combination of compounds, they reach excellent thermal stability, enabling operation at or above 230°C (depending on the design),
With the option for tailored forming and targeted design, these magnets can be produced in multiple shapes and sizes, greatly improving application potential,
Wide application in modern technologies – they find application in data storage devices, electric drives, clinical machines as well as technologically developed systems,
Thanks to their power density, small magnets offer high magnetic performance, in miniature format,

Disadvantages of rare earth magnets:

They are fragile when subjected to a powerful impact. If the magnets are exposed to mechanical hits, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage , and at the same time increases its overall resistance,
High temperatures may significantly reduce the magnetic power of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on size). 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 damp air can degrade. Therefore, for outdoor applications, we advise waterproof types made of plastic,
Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing holes directly in the magnet,
Potential hazard from tiny pieces may arise, in case of ingestion, which is notable in the health of young users. Moreover, small elements from these products can complicate medical imaging when ingested,
High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Exercise Caution with Neodymium Magnets

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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

People with pacemakers are advised to avoid neodymium magnets.

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 can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.

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

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.

Magnets made of neodymium are characterized by being fragile, which can cause them to become damaged.

Neodymium magnets are delicate and will shatter if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Under no circumstances should neodymium magnets be brought 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 over 10 times stronger than ferrite magnets (the ones in speakers), and their power can shock you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.

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.

Do not give neodymium magnets to 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.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Neodymium magnets produce intense magnetic fields that can destroy 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. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

Exercise caution!

So that know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous very strong neodymium magnets.