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MPL 30x20x4 / N38 - lamellar magnet

lamellar magnet

Catalog no 020286

GTIN: 5906301811848

length [±0,1 mm]

30 mm

Width [±0,1 mm]

20 mm

Height [±0,1 mm]

4 mm

Weight

18 g

Magnetization Direction

↑ axial

Load capacity

7.73 kg / 75.81 N

Magnetic Induction

180.57 mT

Coating

[NiCuNi] nickel

10.23 ZŁ with VAT / pcs + price for transport

8.32 ZŁ net + 23% VAT / pcs

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MPL 30x20x4 / N38 - lamellar magnet

Specification/characteristics MPL 30x20x4 / N38 - lamellar magnet

properties

values

Cat. no.

020286

GTIN

5906301811848

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

30 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

18 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

7.73 kg / 75.81 N

Magnetic Induction ~ ?

180.57 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 min. MPL 30x20x4 / N38 are magnets made from neodymium in a flat form. They are appreciated for their extremely powerful magnetic properties, which outshine traditional iron magnets.
Thanks to their mighty power, flat magnets are commonly used in devices that require very strong attraction.
Typical temperature resistance of these magnets is 80 °C, but with larger dimensions, this value can increase.
In addition, flat magnets commonly have different coatings applied to their surfaces, e.g. nickel, gold, or chrome, for enhancing their durability.
The magnet named MPL 30x20x4 / N38 i.e. a lifting capacity of 7.73 kg weighing just 18 grams, making it the ideal choice for projects needing a flat magnet.

Neodymium flat magnets present a range of advantages versus other magnet shapes, which make them being an ideal choice for various uses:
Contact surface: Thanks to their flat shape, flat magnets ensure a greater contact surface with other components, which is beneficial in applications requiring a stronger magnetic connection.
Technology applications: They are often utilized in different devices, e.g. sensors, stepper motors, or speakers, where the flat shape is important 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 allows designers a lot of flexibility in placing them in structures, which can be 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 sliding or rotating. However, it's important to note that the optimal shape of the magnet depends on the given use and requirements. In some cases, other shapes, like cylindrical or spherical, may be a better choice.

How do magnets work? 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 arises from the ordered movement of electrons in their structure. Magnetic fields of these objects creates attractive interactions, which attract objects made of cobalt or other ferromagnetic substances.

Magnets have two main poles: north (N) and south (S), which interact with each other when they are different. Similar poles, e.g. two north poles, repel each other.
Due to these properties, magnets are regularly used in electrical devices, such as 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. Moreover, the strength of a magnet depends on its size and the material it is made of.

Magnets do not attract plastics, glass, wood or most gemstones. Furthermore, magnets do not affect certain 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 do not respond to a standard magnetic field, unless exposed to a very strong magnetic field.
It should be noted that extremely high temperatures, above the Curie point, cause a loss of magnetic properties in the magnet. 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, credit cards or medical equipment, like pacemakers. For this reason, it is important to avoid placing magnets near such devices.

A neodymium plate magnet of class N50 and N52 is a powerful and strong magnetic piece shaped like a plate, that provides high force and versatile application. Attractive price, fast shipping, durability and versatility.

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their long-term stability, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after 10 years, the performance loss is only ~1% (in laboratory conditions),
They show strong resistance to demagnetization from external magnetic fields,
By applying a shiny layer of silver, the element gains a sleek look,
They possess strong magnetic force measurable at the magnet’s surface,
Neodymium magnets are known for very high magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the magnetic form),
The ability for accurate shaping and adaptation to individual needs – neodymium magnets can be manufactured in many forms and dimensions, which extends the scope of their use cases,
Wide application in new technology industries – they are used in HDDs, electric motors, clinical machines and other advanced devices,
Relatively small size with high magnetic force – neodymium magnets offer strong power in small dimensions, which makes them useful in compact constructions

Disadvantages of rare earth magnets:

They can break when subjected to a sudden impact. If the magnets are exposed to mechanical hits, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from damage while also strengthens its overall robustness,
Magnets lose power when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible magnetic decay (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
Magnets exposed to damp air can corrode. Therefore, for outdoor applications, we advise waterproof types made of coated materials,
Limited ability to create precision features in the magnet – the use of a external casing is recommended,
Health risk linked to microscopic shards may arise, especially if swallowed, which is significant in the protection of children. Furthermore, miniature parts from these products may disrupt scanning if inside the body,
High unit cost – neodymium magnets are pricier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications

Handle with Care: Neodymium Magnets

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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Never bring neodymium magnets close to a phone and GPS.

Intense magnetic 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 extremely fragile, they easily break as well as can become damaged.

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. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets should not be in the vicinity children.

Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

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

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.

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 become demagnetized at high temperatures.

While 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.

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 joining of neodymium magnets is not controlled, at that time they may crumble and crack. You can't approach them to each other. At a distance less than 10 cm you should have them very firmly.

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

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Safety precautions!

In order for you to know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous very strong neodymium magnets.