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MPL 7x7x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020176

GTIN: 5906301811824

length [±0,1 mm]

7 mm

Width [±0,1 mm]

7 mm

Height [±0,1 mm]

3 mm

Weight

1.1 g

Magnetization Direction

↑ axial

Load capacity

1.66 kg / 16.28 N

Magnetic Induction

376.99 mT

Coating

[NiCuNi] nickel

0.47 ZŁ with VAT / pcs + price for transport

0.38 ZŁ net + 23% VAT / pcs

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MPL 7x7x3 / N38 - lamellar magnet

Specification/characteristics MPL 7x7x3 / N38 - lamellar magnet

properties

values

Cat. no.

020176

GTIN

5906301811824

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

7 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.1 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

1.66 kg / 16.28 N

Magnetic Induction ~ ?

376.99 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 7x7x3 / N38 are magnets made from neodymium in a rectangular form. They are valued for their very strong magnetic properties, which outshine traditional ferrite magnets.
Due to their power, flat magnets are regularly used in devices that require strong holding power.
Most common temperature resistance of these magnets is 80 °C, but depending on the dimensions, this value grows.
Moreover, flat magnets usually have special coatings applied to their surfaces, e.g. nickel, gold, or chrome, for enhancing their durability.
The magnet named MPL 7x7x3 / N38 i.e. a magnetic force 1.66 kg with a weight of a mere 1.1 grams, making it the ideal choice for projects needing a flat magnet.

Neodymium flat magnets provide a range of advantages compared to other magnet shapes, which cause them being a perfect solution for many applications:
Contact surface: Thanks to their flat shape, flat magnets guarantee a greater contact surface with other components, which can be beneficial in applications needing a stronger magnetic connection.
Technology applications: These magnets are often applied in different devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is necessary for their operation.
Mounting: Their flat shape makes it easier mounting, particularly when there's a need to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets allows designers greater flexibility in placing them in devices, which can be more difficult with magnets of more complex shapes.
Stability: In certain applications, the flat base of the flat magnet may offer better stability, minimizing the risk of sliding or rotating. It’s important to keep in mind that the optimal shape of the magnet depends on the given use and requirements. In some cases, other shapes, such as cylindrical or spherical, are more appropriate.

Magnets attract objects made of ferromagnetic materials, such as iron, objects containing nickel, cobalt and 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.

The operation of magnets is based on the properties of their magnetic field, which is generated by the movement of electric charges within their material. Magnetic fields of magnets creates attractive interactions, which affect materials containing nickel or other magnetic materials.

Magnets have two 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 regularly used in electrical devices, e.g. motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength of attraction, making them ideal for applications requiring powerful magnetic fields. Additionally, the strength of a magnet depends on its size and the materials used.

Magnets do not attract plastics, glass items, wood and precious stones. Moreover, magnets do not affect certain metals, such as copper items, aluminum, gold. Although these metals conduct electricity, do not exhibit ferromagnetic properties, meaning that they remain unaffected by a magnet, unless they are subjected to an extremely 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 compasses, credit cards or electronic devices sensitive to magnetic fields. Therefore, it is important to avoid placing magnets near such devices.

A flat magnet of class N52 and N50 is a strong and extremely powerful metallic component shaped like a plate, providing high force and broad usability. Very good price, availability, ruggedness and broad range of uses.

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from their superior holding force, neodymium magnets have these key benefits:

They do not lose their even during nearly 10 years – the decrease of strength is only ~1% (according to tests),
They show superior resistance to demagnetization from outside magnetic sources,
The use of a decorative gold surface provides a refined finish,
The outer field strength of the magnet shows advanced magnetic properties,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
Thanks to the freedom in shaping and the capability to adapt to individual requirements, neodymium magnets can be created in various configurations, which increases their functional possibilities,
Key role in new technology industries – they serve a purpose in computer drives, electromechanical systems, diagnostic apparatus as well as technologically developed systems,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in small dimensions, which allows for use in miniature devices

Disadvantages of magnetic elements:

They can break when subjected to a strong impact. If the magnets are exposed to shocks, it is suggested to place them in a steel housing. The steel housing, in the form of a holder, protects the magnet from damage , and at the same time strengthens its overall durability,
They lose strength at increased temperatures. Most neodymium magnets experience permanent loss in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Magnets exposed to wet conditions can oxidize. Therefore, for outdoor applications, we advise waterproof types made of non-metallic composites,
Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing threads directly in the magnet,
Health risk from tiny pieces may arise, especially if swallowed, which is crucial in the family environments. It should also be noted that minuscule fragments from these assemblies have the potential to complicate medical imaging if inside the body,
In cases of large-volume purchasing, neodymium magnet cost is a challenge,

Caution with Neodymium Magnets

Keep neodymium magnets away from children.

Remember that neodymium magnets are not toys. Do not allow children to play 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 can become demagnetized at high temperatures.

Despite the general resilience of magnets, 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.

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

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 damage devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

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. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

Neodymium magnets are delicate and can easily break and shatter.

Neodymium magnets are characterized by considerable fragility. Neodymium magnets are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

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

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.

Neodymium magnets can attract to each other, pinch the skin, and cause significant swellings.

Neodymium magnets will jump and also contact together within a distance of several to almost 10 cm from each other.

Neodymium magnets are the most powerful magnets ever invented. Their strength can shock you.

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.

Pay attention!

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