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MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

lamellar magnet

Catalog no 020397

GTIN: 5906301811909

length [±0,1 mm]

40 mm

Width [±0,1 mm]

10 mm

Height [±0,1 mm]

5 mm

Weight

15 g

Magnetization Direction

↑ axial

Load capacity

7.9 kg / 77.47 N

Magnetic Induction

321.37 mT

Coating

[NiCuNi] nickel

9.93 ZŁ with VAT / pcs + price for transport

8.07 ZŁ net + 23% VAT / pcs

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MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

Specification/characteristics MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

properties

values

Cat. no.

020397

GTIN

5906301811909

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

5 mm [±0,1 mm]

Weight

15 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

7.9 kg / 77.47 N

Magnetic Induction ~ ?

321.37 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 i.e. MPL 40x10x5x2[7/3.5] / N38 are magnets made from neodymium in a rectangular form. They are valued for their extremely powerful magnetic properties, which outshine traditional iron magnets.
Thanks to their mighty power, flat magnets are regularly applied in structures that require exceptional adhesion.
Typical temperature resistance of flat magnets is 80°C, but with larger dimensions, this value rises.
In addition, flat magnets commonly have special coatings applied to their surfaces, such as nickel, gold, or chrome, to increase their corrosion resistance.
The magnet labeled MPL 40x10x5x2[7/3.5] / N38 i.e. a lifting capacity of 7.9 kg with a weight of just 15 grams, making it the excellent choice for applications requiring a flat shape.

Neodymium flat magnets provide a range of advantages versus other magnet shapes, which cause them being the best choice for a multitude of projects:
Contact surface: Thanks to their flat shape, flat magnets ensure a greater contact surface with other components, which can be beneficial in applications needing a stronger magnetic connection.
Technology applications: These are often utilized in various devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is crucial for their operation.
Mounting: This form's flat shape makes mounting, especially when there's a need to attach the magnet to some surface.
Design flexibility: The flat shape of the magnets gives the possibility designers a lot of flexibility in arranging them in devices, which is more difficult with magnets of other shapes.
Stability: In certain applications, the flat base of the flat magnet may offer better stability, reducing the risk of shifting or rotating. However, it's important to note that the optimal shape of the magnet is dependent on the specific application and requirements. In certain cases, other shapes, like cylindrical or spherical, may be a better choice.

Attracted by magnets are objects made of ferromagnetic materials, such as iron elements, nickel, 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.

Magnets work thanks to the properties of the magnetic field, which arises from the ordered movement of electrons in their structure. Magnetic fields of these objects creates attractive forces, which affect materials containing iron or other ferromagnetic substances.

Magnets have two main poles: north (N) and south (S), which attract each other when they are different. Poles of the same kind, e.g. two north poles, repel each other.
Thanks to this principle of operation, magnets are commonly used in magnetic technologies, such as motors, speakers, sensors, or magnetic locks. Neodymium magnets stand out with the greatest strength of attraction, making them perfect for applications requiring powerful magnetic fields. Additionally, the strength of a magnet depends on its size and the material it is made of.

Not all materials react to magnets, and examples of such substances are plastics, glass, wooden materials and most gemstones. Moreover, magnets do not affect certain metals, such as copper items, aluminum, 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 they are subjected to an extremely 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 compasses, magnetic stripe cards and even medical equipment, like pacemakers. Therefore, it is important to exercise caution when using magnets.

A neodymium plate magnet N52 and N50 is a strong and powerful magnetic product in the form of a plate, that provides high force and versatile application. Very good price, availability, stability and broad range of uses.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their tremendous magnetic power, neodymium magnets offer the following advantages:

They retain their magnetic properties for almost 10 years – the loss is just ~1% (according to analyses),
They are very resistant to demagnetization caused by external magnetic fields,
The use of a mirror-like gold surface provides a eye-catching finish,
They exhibit superior levels of magnetic induction near the outer area of the magnet,
With the right combination of materials, they reach significant thermal stability, enabling operation at or above 230°C (depending on the form),
Thanks to the freedom in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in diverse shapes and sizes, which expands their usage potential,
Key role in modern technologies – they serve a purpose in computer drives, rotating machines, diagnostic apparatus as well as high-tech tools,
Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in compact dimensions, which makes them useful in miniature devices

Disadvantages of neodymium magnets:

They can break when subjected to a strong impact. If the magnets are exposed to shocks, we recommend in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage and reinforces its overall strength,
They lose magnetic force at elevated temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the geometry and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
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 fine details in neodymium magnets is restricted,
Safety concern linked to microscopic shards may arise, especially if swallowed, which is notable in the health of young users. It should also be noted that tiny components from these devices have the potential to disrupt scanning after being swallowed,
In cases of large-volume purchasing, neodymium magnet cost may not be economically viable,

Optimal lifting capacity of a neodymium magnet – what it depends on?

The given strength of the magnet means the optimal strength, calculated in the best circumstances, specifically:

with mild steel, used as a magnetic flux conductor
having a thickness of no less than 10 millimeters
with a smooth surface
with no separation
in a perpendicular direction of force
under standard ambient temperature

Practical lifting capacity: influencing factors

The lifting capacity of a magnet depends on in practice the following factors, ordered from most important to least significant:

Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) can cause 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 testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.

Exercise Caution with Neodymium Magnets

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

Neodymium magnets generate strong magnetic fields that can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage videos, 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.

Neodymium magnets produce strong magnetic fields that can interfere 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.

Keep neodymium magnets away from 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.

Dust and powder from neodymium magnets are highly flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Do not give neodymium magnets to youngest children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

Magnets will crack or alternatively crumble with uncontrolled connecting to each other. You can't approach them to each other. At a distance less than 10 cm you should have them very strongly.

Avoid contact with neodymium magnets 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 among the strongest magnets on Earth. The surprising force they generate between each other can shock you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.

Neodymium magnets can become demagnetized at high temperatures.

Even though magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

Neodymium magnetic are incredibly fragile, they easily crack and can crumble.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

Safety rules!

To show why neodymium magnets are so dangerous, read the article - How dangerous are very powerful neodymium magnets?.