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MPL 50x30x4 / N38 - lamellar magnet

lamellar magnet

Catalog no 020497

length [±0,1 mm]

50 mm

Width [±0,1 mm]

30 mm

Height [±0,1 mm]

4 mm

Weight

45 g

Magnetization Direction

↑ axial

Magnetic Induction

120.04 mT

Coating

[NiCuNi] nickel

25.83 ZŁ with VAT / pcs + price for transport

21.00 ZŁ net + 23% VAT / pcs

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MPL 50x30x4 / N38 - lamellar magnet

Specification/characteristics MPL 50x30x4 / N38 - lamellar magnet

properties

values

Cat. no.

020497

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

50 mm [±0,1 mm]

Width

30 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

45 g [±0,1 mm]

Magnetization Direction

↑ axial

Magnetic Induction ~ ?

120.04 mT

Coating

[NiCuNi] nickel

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N38

properties

values

units

remenance Br [Min. - Max.] ?

12.2-12.6

kGs

remenance Br [Min. - Max.] ?

1220-1260

coercivity bHc ?

10.8-11.5

kOe

coercivity bHc ?

860-915

kA/m

actual internal force iHc

≥ 12

kOe

actual internal force iHc

≥ 955

kA/m

energy density [Min. - Max.] ?

36-38

BH max MGOe

energy density [Min. - Max.] ?

287-303

BH max KJ/m

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 50x30x4 / N38 are magnets made from neodymium in a flat form. They are valued for their extremely powerful magnetic properties, which are much stronger than traditional iron magnets.
Due to their strength, flat magnets are regularly applied in structures that need exceptional adhesion.
Most common temperature resistance of flat magnets is 80°C, but with larger dimensions, this value can increase.
Additionally, flat magnets commonly have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, to improve their strength.
The magnet named MPL 50x30x4 / N38 i.e. a magnetic force 0 kg with a weight of a mere 45 grams, making it the excellent choice for projects needing a flat magnet.

Neodymium flat magnets present a range of advantages versus other magnet shapes, which cause them being an ideal choice for a multitude of projects:
Contact surface: Due 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: These magnets are often used in different devices, e.g. sensors, stepper motors, or speakers, where the flat shape is necessary for their operation.
Mounting: The flat form's flat shape makes it easier mounting, particularly when it is required to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets permits 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 can provide better stability, minimizing the risk of sliding or rotating. However, it's important to note that the optimal shape of the magnet is dependent on the specific project and requirements. In certain cases, other shapes, such as cylindrical or spherical, may be a better choice.

Magnets attract ferromagnetic materials, such as iron, objects containing nickel, 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 their magnetic field, which is generated by the movement of electric charges within their material. Magnetic fields of magnets creates attractive forces, which attract materials containing nickel or other ferromagnetic substances.

Magnets have two poles: north (N) and south (S), which attract each other when they are different. Similar poles, e.g. 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 greatest strength of attraction, making them indispensable for applications requiring powerful magnetic fields. Additionally, the strength of a magnet depends on its dimensions and the material it is made of.

Magnets do not attract plastics, glass, wooden materials and most gemstones. Moreover, magnets do not affect most metals, such as copper, 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 exposed to a very strong magnetic field.
It should be noted 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 and even medical equipment, like pacemakers. Therefore, it is important to avoid placing magnets near such devices.

A neodymium magnet of class N52 and N50 is a powerful and strong magnetic piece in the form of a plate, featuring high force and broad usability. Attractive price, availability, stability and versatility.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from their notable magnetic energy, neodymium magnets have these key benefits:

They do not lose their even during around 10 years – the reduction of power is only ~1% (according to tests),
Their ability to resist magnetic interference from external fields is notable,
Thanks to the shiny finish and silver coating, they have an elegant appearance,
The outer field strength of the magnet shows elevated magnetic properties,
Thanks to their enhanced temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
With the option for fine forming and personalized design, these magnets can be produced in numerous shapes and sizes, greatly improving design adaptation,
Key role in new technology industries – they serve a purpose in computer drives, electric motors, clinical machines or even sophisticated instruments,
Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of neodymium magnets:

They are fragile when subjected to a sudden impact. If the magnets are exposed to external force, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage and additionally reinforces its overall robustness,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on shape). 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,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of rubber for outdoor use,
The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is restricted,
Safety concern linked to microscopic shards may arise, especially if swallowed, which is significant in the family environments. Additionally, small elements from these assemblies might hinder health screening when ingested,
In cases of tight budgets, neodymium magnet cost is a challenge,

Best holding force of the magnet in ideal parameters – what affects it?

The given pulling force of the magnet represents the maximum force, calculated under optimal conditions, that is:

with mild steel, serving as a magnetic flux conductor
of a thickness of at least 10 mm
with a smooth surface
in conditions of no clearance
under perpendicular detachment force
in normal thermal conditions

Lifting capacity in practice – influencing factors

The lifting capacity of a magnet depends on in practice the following factors, according to their importance:

Air gap between the magnet and the plate, since even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.

Exercise Caution with Neodymium Magnets

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

Strong magnetic fields emitted by neodymium magnets can damage 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.

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 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 can become demagnetized at high temperatures.

Whilst Neodymium magnets can demagnetize 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.

Avoid bringing neodymium magnets close to a phone or GPS.

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

If have a finger between or on the path of attracting magnets, there may be a large cut or a fracture.

The magnet is coated with nickel. Therefore, exercise caution 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.

Keep neodymium magnets away from children.

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.

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

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.

Magnets made of neodymium are highly susceptible to damage, leading to their cracking.

Neodymium magnets are fragile as well as 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, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Safety rules!

To raise awareness of why neodymium magnets are so dangerous, see the article titled How very dangerous are very powerful neodymium magnets?.