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MPL 40x5x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020402

GTIN: 5906301811916

length [±0,1 mm]

40 mm

Width [±0,1 mm]

5 mm

Height [±0,1 mm]

3 mm

Weight

4.5 g

Magnetization Direction

↑ axial

Load capacity

3.35 kg / 32.85 N

Magnetic Induction

348.83 mT

Coating

[NiCuNi] nickel

3.97 ZŁ with VAT / pcs + price for transport

3.23 ZŁ net + 23% VAT / pcs

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MPL 40x5x3 / N38 - lamellar magnet

Specification/characteristics MPL 40x5x3 / N38 - lamellar magnet

properties

values

Cat. no.

020402

GTIN

5906301811916

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

40 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

4.5 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

3.35 kg / 32.85 N

Magnetic Induction ~ ?

348.83 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 40x5x3 / N38 are magnets created from neodymium in a flat form. They are known for their very strong magnetic properties, which outshine standard ferrite magnets.
Thanks to their mighty power, flat magnets are commonly applied in devices that require strong holding power.
The standard temperature resistance of flat magnets is 80 °C, but with larger dimensions, this value rises.
Moreover, flat magnets commonly have special coatings applied to their surfaces, such as nickel, gold, or chrome, to increase their corrosion resistance.
The magnet named MPL 40x5x3 / N38 i.e. a lifting capacity of 3.35 kg with a weight of a mere 4.5 grams, making it the ideal choice for applications requiring a flat shape.

Neodymium flat magnets offer a range of advantages versus other magnet shapes, which lead to them being a perfect solution for a multitude of projects:
Contact surface: Thanks 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: These magnets are often used in different devices, e.g. sensors, stepper motors, or speakers, where the thin and wide shape is crucial for their operation.
Mounting: Their flat shape makes mounting, particularly when it is required to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets allows creators a lot of flexibility in arranging them in structures, which can be more difficult with magnets of more complex shapes.
Stability: In certain applications, the flat base of the flat magnet can offer better stability, minimizing the risk of sliding or rotating. It’s important to keep in mind that the optimal shape of the magnet is dependent on the specific project and requirements. In some cases, other shapes, like cylindrical or spherical, may be more appropriate.

How do magnets work? Magnets attract ferromagnetic materials, such as iron, objects containing nickel, cobalt and alloys of metals with magnetic properties. Additionally, 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 arises from the ordered movement of electrons in their structure. Magnetic fields of these objects creates attractive interactions, which attract materials containing nickel or other ferromagnetic substances.

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 regularly used in electrical devices, such as 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 size and the materials used.

Magnets do not attract plastic, glass items, wooden materials or most gemstones. Furthermore, magnets do not affect certain 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 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 once this temperature is exceeded, the magnet stops being magnetic. Additionally, strong magnets can interfere with the operation of devices, such as compasses, credit cards or electronic devices sensitive to magnetic fields. Therefore, it is important to exercise caution when using magnets.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from immense strength, neodymium magnets have the following advantages:

They do not lose their strength (of the magnet). After approximately 10 years, their strength decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic field,
Thanks to the shiny finish and nickel, gold, or silver coating, they have an aesthetic appearance,
They exhibit extremely high magnetic induction on the surface of the magnet,
Magnetic neodymium magnets are characterized by hugely high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
Thanks to the flexibility in shaping or the ability to adapt to specific requirements – neodymium magnets can be produced in various forms and dimensions, which amplifies their universality in usage.
Key role in advanced technologically fields – are utilized in hard drives, electric drive mechanisms, medical devices and very modern machines.

Disadvantages of neodymium magnets:

They can break when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts, and at the same time increases its overall strength,
High temperatures can reduce the power of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the form and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
They rust in a humid environment - during outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
Health risk associated with microscopic parts of magnets can be dangerous, if swallowed, which becomes significant in the context of child safety. It's also worth noting that miniscule components of these magnets can complicate diagnosis in case of swallowing.

Exercise Caution with Neodymium Magnets

Keep neodymium magnets away from GPS and smartphones.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

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.

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

Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

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 injuries.

In the situation of holding a finger in the path of a neodymium magnet, in that situation, a cut or even a fracture may occur.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

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

Neodymium magnets are extremely fragile, they easily crack as well as can become damaged.

Neodymium magnets are characterized by significant fragility. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of collision between the magnets, small metal fragments can be dispersed in different directions.

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 is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Neodymium magnets are among the most powerful magnets on Earth. The astonishing force they generate between each other can surprise you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Magnets should not be treated as toys. Therefore, it is not recommended for children to have access to them.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing significant injuries, and even death.

Safety precautions!

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