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MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

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MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

lamellar magnet

Catalog no 020151

GTIN: 5906301811572

length [±0,1 mm]

40 mm

Width [±0,1 mm]

10 mm

Height [±0,1 mm]

4 mm

Weight

12 g

Magnetization Direction

↑ axial

Load capacity

6.32 kg / 61.98 N

Magnetic Induction

275.57 mT

Coating

[NiCuNi] nickel

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MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

Specification/characteristics MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

properties

values

Cat. no.

020151

GTIN

5906301811572

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

40 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

12 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

6.32 kg / 61.98 N

Magnetic Induction ~ ?

275.57 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 40x10x4x2[7/3.5] / N38 are magnets created from neodymium in a flat form. They are valued for their exceptionally potent magnetic properties, which outshine ordinary ferrite magnets.
Thanks to their mighty power, flat magnets are commonly used in devices that need strong holding power.
Typical temperature resistance of flat magnets is 80°C, but depending on the dimensions, this value can increase.
Moreover, flat magnets often have special coatings applied to their surfaces, such as nickel, gold, or chrome, to increase their durability.
The magnet with the designation MPL 40x10x4x2[7/3.5] / N38 i.e. a magnetic force 6.32 kg weighing a mere 12 grams, making it the ideal choice for applications requiring a flat shape.

Neodymium flat magnets provide a range of advantages versus other magnet shapes, which make them being an ideal choice for a multitude of projects:
Contact surface: Thanks to their flat shape, flat magnets ensure a larger contact surface with other components, which can be 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 thin and wide shape is crucial for their operation.
Mounting: This form's flat shape simplifies mounting, particularly when there's a need to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets gives the possibility creators a lot of flexibility in arranging them in structures, which is more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of the flat magnet can offer better stability, minimizing the risk of shifting or rotating. However, one should remember that the optimal shape of the magnet is dependent on the specific project and requirements. In certain cases, other shapes, like cylindrical or spherical, are more appropriate.

Attracted by magnets are ferromagnetic materials, such as iron, objects containing nickel, materials with cobalt or special alloys of ferromagnetic metals. Moreover, magnets may weaker affect some other metals, such as steel. Magnets are used in many fields.

Magnets work thanks to the properties of their magnetic field, which arises from the ordered movement of electrons in their structure. The magnetic field of magnets creates attractive forces, which attract objects made of cobalt or other ferromagnetic substances.

Magnets have two main poles: north (N) and south (S), which attract each other when they are different. Similar poles, e.g. two north poles, act repelling on each other.
Thanks to this principle of operation, magnets are often used in electrical devices, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the highest power of attraction, making them ideal 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 plastic, glass, wooden materials and most gemstones. Furthermore, magnets do not affect most metals, such as copper, aluminum materials, gold. Although these metals conduct 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 under such conditions, the magnet stops being magnetic. Interestingly, strong magnets can interfere with the operation of devices, such as compasses, magnetic stripe cards and even electronic devices sensitive to magnetic fields. For this reason, it is important to exercise caution when using magnets.

A neodymium magnet N50 and N52 is a strong and extremely powerful metal object with the shape of a plate, providing high force and broad usability. Good price, 24h delivery, durability and universal usability.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

Their power is durable, and after around ten years, it drops only by ~1% (according to research),
They are very resistant to demagnetization caused by external magnetic sources,
Because of the brilliant layer of silver, the component looks visually appealing,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
Thanks to their exceptional temperature resistance, they can operate (depending on the form) even at temperatures up to 230°C or more,
Thanks to the possibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in different geometries, which broadens their functional possibilities,
Important function in advanced technical fields – they are utilized in HDDs, electric drives, medical equipment and other advanced devices,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of neodymium magnets:

They can break when subjected to a heavy impact. If the magnets are exposed to external force, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from fracture while also reinforces its overall resistance,
Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible magnetic decay (influenced by the magnet’s profile). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
They rust in a wet environment. For outdoor use, we recommend using sealed magnets, such as those made of polymer,
The use of a protective casing or external holder is recommended, since machining internal cuts in neodymium magnets is difficult,
Potential hazard linked to microscopic shards may arise, in case of ingestion, which is crucial in the family environments. It should also be noted that tiny components from these assemblies might hinder health screening once in the system,
Higher purchase price is one of the drawbacks compared to ceramic magnets, especially in budget-sensitive applications

Detachment force of the magnet in optimal conditions – what affects it?

The given holding capacity of the magnet represents the highest holding force, determined in the best circumstances, that is:

with mild steel, used as a magnetic flux conductor
with a thickness of minimum 10 mm
with a smooth surface
with zero air gap
under perpendicular detachment force
at room temperature

Magnet lifting force in use – key factors

In practice, the holding capacity of a magnet is affected by the following aspects, in descending order of importance:

Air gap between the magnet and the plate, because 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.

* Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance {between} the magnet and the plate decreases the holding force.

Handle Neodymium Magnets Carefully

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

Magnets attract each other within a distance of several to around 10 cm from each other. Don't put your fingers in the path of magnet attraction, because a serious injury may occur. Magnets, depending on their size, can even cut off a finger or there can be a severe pressure or a fracture.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and 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 damage to the magnets.

Magnets made of neodymium are extremely delicate, they easily fall apart as well as can crumble.

Magnets made of neodymium are extremely fragile, and by joining them in an uncontrolled manner, they will crumble. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, small metal fragments can be dispersed in different directions.

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.

Never bring neodymium magnets close to a phone and GPS.

Neodymium magnets produce strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

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

Neodymium magnets generate intense magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other 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.

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

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.

Neodymium magnets should not be near 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.

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

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.

Exercise caution!

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