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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

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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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Neodymium flat magnets min. MPL 40x5x3 / N38 are magnets created from neodymium in a rectangular form. They are appreciated for their extremely powerful magnetic properties, which are much stronger than traditional iron magnets.
Due to their power, flat magnets are regularly applied in structures that need very strong attraction.
The standard temperature resistance of these magnets is 80 °C, but with larger dimensions, this value rises.
Moreover, flat magnets commonly have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, to increase their durability.
The magnet labeled MPL 40x5x3 / N38 i.e. a lifting capacity of 3.35 kg weighing just 4.5 grams, making it the excellent choice for applications requiring a flat shape.

Neodymium flat magnets present a range of advantages versus other magnet shapes, which lead to them being a perfect solution for various uses:
Contact surface: Thanks to their flat shape, flat magnets guarantee a greater contact surface with adjacent parts, which is beneficial in applications requiring a stronger magnetic connection.
Technology applications: They are often used in various devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is important for their operation.
Mounting: This form's flat shape makes it easier mounting, especially when there's a need to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets allows creators a lot of flexibility in placing them in structures, which can be more difficult with magnets of more complex shapes.
Stability: In some applications, the flat base of the flat magnet may provide better stability, minimizing the risk of sliding or rotating. However, one should remember that the optimal shape of the magnet is dependent on the specific application and requirements. In some cases, other shapes, such as cylindrical or spherical, are a better choice.

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

The operation of magnets is based on the properties of their magnetic field, which arises from the ordered movement of electrons in their structure. 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 attract each other when they are oppositely oriented. Poles of the same kind, such as two north poles, repel each other.
Thanks to this principle of operation, magnets are often used in magnetic technologies, 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. Additionally, the strength of a magnet depends on its size and the materials used.

Not all materials react to magnets, and examples of such substances are plastics, glass, wooden materials and most gemstones. Furthermore, magnets do not affect most metals, such as copper, aluminum materials, copper, aluminum, and gold. These metals, although they are conductors of electricity, do not exhibit ferromagnetic properties, meaning that they remain unaffected by a magnet, unless exposed to a very strong magnetic field.
It’s worth noting that high temperatures can weaken the magnet's effect. 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 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 metal object designed as a plate, providing strong holding power and universal applicability. Attractive price, availability, durability and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

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

They have stable power, and over more than ten years their performance decreases symbolically – ~1% (according to theory),
They remain magnetized despite exposure to strong external fields,
By applying a shiny layer of gold, the element gains a clean look,
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 fine forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving engineering flexibility,
Significant impact in cutting-edge sectors – they find application in hard drives, rotating machines, clinical machines and other advanced devices,
Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of rare earth magnets:

They are fragile when subjected to a sudden impact. If the magnets are exposed to external force, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage while also strengthens its overall strength,
They lose strength at high temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Magnets exposed to moisture can oxidize. Therefore, for outdoor applications, we advise waterproof types made of non-metallic composites,
The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is restricted,
Possible threat linked to microscopic shards may arise, especially if swallowed, which is notable in the health of young users. It should also be noted that small elements from these assemblies can complicate medical imaging after being swallowed,
Higher purchase price is one of the drawbacks compared to ceramic magnets, especially in budget-sensitive applications

Handle Neodymium Magnets Carefully

Neodymium magnets are especially fragile, which leads to their breakage.

Neodymium magnetic are fragile and will shatter if allowed to collide with each other, even from a distance of a few centimeters. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets are not recommended for people with pacemakers.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes 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.

While Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

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.

Magnets may crack or crumble with uncontrolled joining to each other. Remember not to approach them to each other or hold them firmly in hands at a distance less than 10 cm.

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.

The magnet is coated with nickel - be careful if you have an 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.

Under no circumstances should neodymium magnets be brought close to 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.

Neodymium magnets are among the strongest magnets on Earth. The surprising force they generate between each other can shock 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.

Maintain neodymium magnets far from youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Keep neodymium magnets away from the wallet, computer, and TV.

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, etc. devices. They can also destroy devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Safety precautions!

Please read the article - What danger lies in neodymium magnets? You will learn how to handle them properly.