← previous

Product available shipping tomorrow

MPL 42x20x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020163

GTIN: 5906301811695

length [±0,1 mm]

42 mm

Width [±0,1 mm]

20 mm

Height [±0,1 mm]

5 mm

Weight

31.5 g

Magnetization Direction

↑ axial

Load capacity

11.44 kg / 112.19 N

Magnetic Induction

203.37 mT

Coating

[NiCuNi] nickel

15.49 ZŁ with VAT / pcs + price for transport

12.59 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

12.59 ZŁ

15.49 ZŁ

price from 48 pcs

11.83 ZŁ

14.56 ZŁ

price from 199 pcs

11.08 ZŁ

13.63 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Looking for a better price?

Contact us by phone +48 888 99 98 98 alternatively let us know using contact form through our site.
Force and appearance of neodymium magnets can be verified on our power calculator.

Order by 14:00 and we’ll ship today!

MPL 42x20x5 / N38 - lamellar magnet

Specification/characteristics MPL 42x20x5 / N38 - lamellar magnet

properties

values

Cat. no.

020163

GTIN

5906301811695

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

length

42 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

31.5 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

11.44 kg / 112.19 N

Magnetic Induction ~ ?

203.37 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

Shopping tips

Produkt dostępny wysyłka jutro!

MW 15x4 / N38 - cylindrical magnet

1.60 ZŁ / pcs

Produkt dostępny wysyłka jutro!

MW 38x15 / N38 - cylindrical magnet

70.00 ZŁ / pcs

Produkt dostępny wysyłka jutro!

SM 32x300 [2xM8] / N52 - magnetic separator

971.70 ZŁ / pcs

Produkt dostępny wysyłka jutro!

UMH 48x11x65 [M6] / N38 - magnetic holder with hook

68.88 ZŁ / pcs

Flat neodymium magnets min. MPL 42x20x5 / N38 are magnets made from neodymium in a rectangular form. They are appreciated for their exceptionally potent magnetic properties, which are much stronger than ordinary iron magnets.
Due to their strength, flat magnets are commonly used in products that need strong holding power.
Most common temperature resistance of flat magnets is 80 °C, but with larger dimensions, this value rises.
Moreover, flat magnets usually have different coatings applied to their surfaces, such as nickel, gold, or chrome, for enhancing their durability.
The magnet named MPL 42x20x5 / N38 i.e. a magnetic strength 11.44 kg with a weight of only 31.5 grams, making it the excellent 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 a multitude of projects:
Contact surface: Due to their flat shape, flat magnets ensure a greater contact surface with adjacent parts, which is beneficial in applications requiring a stronger magnetic connection.
Technology applications: These magnets are often utilized in different devices, such as sensors, stepper motors, or speakers, where the thin and wide shape is important for their operation.
Mounting: Their flat shape simplifies mounting, especially when it is required to attach the magnet to another surface.
Design flexibility: The flat shape of the magnets permits creators greater flexibility in placing them in devices, which can be more difficult with magnets of other shapes.
Stability: In some applications, the flat base of the flat magnet can offer better stability, reducing the risk of shifting or rotating. It’s important to keep in mind that the optimal shape of the magnet depends on the given use and requirements. In certain cases, other shapes, such as cylindrical or spherical, are more appropriate.

How do magnets work? Magnets attract objects made of ferromagnetic materials, such as iron elements, nickel, cobalt and special alloys of ferromagnetic metals. Additionally, magnets may weaker affect some other metals, 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 magnets creates attractive forces, which affect materials containing cobalt or other ferromagnetic substances.

Magnets have two poles: north (N) and south (S), which attract each other when they are different. Poles of the same kind, such as two north poles, repel each other.
Thanks to this principle of operation, magnets are commonly 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 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 plastic, glass, wood or most gemstones. Additionally, magnets do not affect certain metals, such as copper items, aluminum materials, 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 under such conditions, the magnet stops being magnetic. Interestingly, strong magnets can interfere with the operation of devices, such as compasses, magnetic stripe cards or medical equipment, like pacemakers. For this reason, it is important to avoid placing magnets near such devices.

A flat magnet of class N50 and N52 is a strong and extremely powerful magnetic product in the form of a plate, providing strong holding power and universal applicability. Very good price, 24h delivery, resistance and broad range of uses.

Advantages as well as disadvantages of neodymium magnets NdFeB.

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

They do not lose their power approximately 10 years – the decrease of power is only ~1% (based on measurements),
They protect against demagnetization induced by surrounding electromagnetic environments remarkably well,
By applying a bright layer of nickel, the element gains a clean look,
They have extremely strong magnetic induction on the surface of the magnet,
Thanks to their enhanced temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
The ability for custom shaping as well as adaptation to individual needs – neodymium magnets can be manufactured in multiple variants of geometries, which extends the scope of their use cases,
Significant impact in advanced technical fields – they are used in computer drives, rotating machines, medical equipment and technologically developed systems,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of magnetic elements:

They may fracture when subjected to a strong impact. If the magnets are exposed to external force, they should be placed in a metal holder. The steel housing, in the form of a holder, protects the magnet from fracture while also enhances its overall durability,
High temperatures may significantly reduce the magnetic power 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,
Magnets exposed to damp air can oxidize. Therefore, for outdoor applications, it's best to use waterproof types made of non-metallic composites,
The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is not feasible,
Safety concern linked to microscopic shards may arise, especially if swallowed, which is important in the context of child safety. It should also be noted that minuscule fragments from these assemblies may disrupt scanning after being swallowed,
Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications

Safety Guidelines with Neodymium Magnets

Neodymium magnetic are known for their fragility, which can cause them to crumble.

Neodymium magnetic are fragile and will shatter if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

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

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

Magnets attract each other within a distance of several to about 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, are able even cut off a finger or there can be a severe pressure or even a fracture.

Do not give neodymium magnets to youngest children.

Not all neodymium magnets are toys, so do not let children play with them. Small magnets pose a serious choking hazard or can attract to each other in the intestines. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

Keep neodymium magnets away from GPS and smartphones.

Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.

Neodymium magnets are over 10 times stronger than ferrite magnets (the ones in speakers), and their strength can shock you.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

The magnet coating is made of nickel, so be cautious 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 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 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.

Safety rules!

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