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MPL 50x50x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020167

GTIN: 5906301811732

5.00

length

50 mm [±0,1 mm]

Width

50 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

187.5 g

Magnetization Direction

↑ axial

Load capacity

33.73 kg / 330.92 N

Magnetic Induction

209.75 mT / 2097 Gs

Coating

[NiCuNi] Nickel

42.88 ZŁ with VAT / pcs + price for transport

34.86 ZŁ net + 23% VAT / pcs

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Force along with shape of a neodymium magnet can be calculated using our online calculation tool.

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MPL 50x50x10 / N38 - lamellar magnet

Specification / characteristics MPL 50x50x10 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020167
GTIN	5906301811732
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
length	50 mm [±0,1 mm]
Width	50 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	187.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	33.73 kg / 330.92 N
Magnetic Induction ~ ?	209.75 mT / 2097 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 50x50x10 / N38 - lamellar magnet

properties	values	units
remenance Br [Min. - Max.] ?	12.2-12.6	kGs
remenance Br [Min. - Max.] ?	1220-1260	T
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 sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
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

Physical modeling of the magnet - data

These data constitute the direct effect of a engineering simulation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Actual performance may differ. Please consider these data as a reference point when designing systems.

Table 1: Static force (pull vs gap) - power drop
MPL 50x50x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2097 Gs 209.7 mT	33.73 kg / 33730.0 g 330.9 N	critical level
1 mm	2056 Gs 205.6 mT	32.43 kg / 32430.0 g 318.1 N	critical level
2 mm	2009 Gs 200.9 mT	30.96 kg / 30964.6 g 303.8 N	critical level
3 mm	1957 Gs 195.7 mT	29.38 kg / 29380.4 g 288.2 N	critical level
5 mm	1841 Gs 184.1 mT	25.99 kg / 25992.3 g 255.0 N	critical level
10 mm	1514 Gs 151.4 mT	17.58 kg / 17577.6 g 172.4 N	critical level
15 mm	1194 Gs 119.4 mT	10.93 kg / 10931.8 g 107.2 N	critical level
20 mm	922 Gs 92.2 mT	6.51 kg / 6512.2 g 63.9 N	strong
30 mm	543 Gs 54.3 mT	2.26 kg / 2260.0 g 22.2 N	strong
50 mm	209 Gs 20.9 mT	0.33 kg / 334.1 g 3.3 N	low risk

Pulling power weakens drastically per each millimeter of spacing. Remember that every additional insulation layer (e.g., contamination, paint, veneer) strongly diminishes the holding power. Magnetic products hold optimally in perfect adhesion; air break drastically cuts the force. Notice how flashily the pull force plummet, when the product does not touch directly to the metal substrate. When calculating the arrangement, avoid redundant distances.

Table 2: Sliding Hold (Vertical Surface)
MPL 50x50x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	6.75 kg / 6746.0 g 66.2 N
1 mm	Stal (~0.2)	6.49 kg / 6486.0 g 63.6 N
2 mm	Stal (~0.2)	6.19 kg / 6192.0 g 60.7 N
3 mm	Stal (~0.2)	5.88 kg / 5876.0 g 57.6 N
5 mm	Stal (~0.2)	5.20 kg / 5198.0 g 51.0 N
10 mm	Stal (~0.2)	3.52 kg / 3516.0 g 34.5 N
15 mm	Stal (~0.2)	2.19 kg / 2186.0 g 21.4 N
20 mm	Stal (~0.2)	1.30 kg / 1302.0 g 12.8 N
30 mm	Stal (~0.2)	0.45 kg / 452.0 g 4.4 N
50 mm	Stal (~0.2)	0.07 kg / 66.0 g 0.6 N

This section indicates the approximate force needed to initiate the downward movement of the magnet vertically against a vertical metal surface (assuming typical friction coefficient). This parameter is relative to the distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MPL 50x50x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	10.12 kg / 10119.0 g 99.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	6.75 kg / 6746.0 g 66.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	3.37 kg / 3373.0 g 33.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	16.87 kg / 16865.0 g 165.4 N

When hanging a element on a vertical surface (e.g., a car body), it will maintain just about 1/5 of its maximum pull force. Gravitational force as well as a weak degree of grip influence the fact that products slide down faster than they pop off the substrate. Planning a hanger? Remember that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the element will slip down under a much lighter cargo. Using a rubber coating can significantly improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 50x50x10 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	5%	1.69 kg / 1686.5 g 16.5 N
1 mm	13%	4.22 kg / 4216.3 g 41.4 N
2 mm	25%	8.43 kg / 8432.5 g 82.7 N
5 mm	63%	21.08 kg / 21081.2 g 206.8 N
10 mm	100%	33.73 kg / 33730.0 g 330.9 N

A thin metal plate cannot absorb the full magnetic flux, which wastes potential of the holder. Should you attach a powerful product to a thin surface, the field will pass right through and the attraction force will be weaker. To squeeze full efficiency of this magnet's potential, you require a sufficiently solid backing of steel. The material oversaturation means that on sheet metal structures (e.g., appliance housings), the product shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MPL 50x50x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	33.73 kg / 33730.0 g 330.9 N	OK
40 °C	-2.2%	32.99 kg / 32987.9 g 323.6 N	OK
60 °C	-4.4%	32.25 kg / 32245.9 g 316.3 N
80 °C	-6.6%	31.50 kg / 31503.8 g 309.1 N
100 °C	-28.8%	24.02 kg / 24015.8 g 235.6 N

Classic neodymiums change their properties power past the thermal threshold. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's capacity briefly decreases. Avoid using this product close to heaters higher than its working range. Ignoring the limit will result in destruction of magnetic properties.

*Important note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than taller cylinders. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 50x50x10 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	67.80 kg / 67795 g 665.1 N 3 611 Gs	N/A
1 mm	66.54 kg / 66544 g 652.8 N 4 156 Gs	59.89 kg / 59889 g 587.5 N ~0 Gs
2 mm	65.18 kg / 65182 g 639.4 N 4 113 Gs	58.66 kg / 58664 g 575.5 N ~0 Gs
3 mm	63.74 kg / 63744 g 625.3 N 4 067 Gs	57.37 kg / 57369 g 562.8 N ~0 Gs
5 mm	60.67 kg / 60670 g 595.2 N 3 968 Gs	54.60 kg / 54603 g 535.7 N ~0 Gs
10 mm	52.24 kg / 52243 g 512.5 N 3 682 Gs	47.02 kg / 47019 g 461.3 N ~0 Gs
20 mm	35.33 kg / 35330 g 346.6 N 3 028 Gs	31.80 kg / 31797 g 311.9 N ~0 Gs
50 mm	7.69 kg / 7692 g 75.5 N 1 413 Gs	6.92 kg / 6923 g 67.9 N ~0 Gs

Two magnetic products interact from a wider radius than a neodymium and metal combination. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of action. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the collision energy is extreme. The repulsion force is slightly lower than the connection force, but still significant.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint of the gap (due to field cancellation).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 50x50x10 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	21.0 cm
Hearing aid	10 Gs (1.0 mT)	16.5 cm
Mechanical watch	20 Gs (2.0 mT)	13.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	10.0 cm
Remote	50 Gs (5.0 mT)	9.5 cm
Payment card	400 Gs (40.0 mT)	4.0 cm
HDD hard drive	600 Gs (60.0 mT)	3.0 cm

Powerful magnet radiation poses a real danger to IT equipment and pacemakers. These NdFeB products produce a flux that destroys function of digital equipment. Be aware: the unseen radiation acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MPL 50x50x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.38 km/h (4.83 m/s)	2.19 J
30 mm	24.39 km/h (6.78 m/s)	4.30 J
50 mm	30.43 km/h (8.45 m/s)	6.70 J
100 mm	42.78 km/h (11.88 m/s)	13.24 J

Neodymium magnets are very brittle – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or painful pinches to skin. Be sure to control the product during installation so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles when playing with powerful specimens.

Table 9: Corrosion resistance
MPL 50x50x10 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MPL 50x50x10 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	61 501 Mx	615.0 µWb
Współczynnik Pc	0.26	Niski (Płaski)

Total magnetic flux flowing through the pole face. Key data for coil applications and sensors. Permeance Coefficient defines the magnet operating point.

Table 11: Submerged application
MPL 50x50x10 / N38

Environment	Effective steel pull	Effect
Air (land)	33.73 kg	Standard
Water (riverbed)	38.62 kg (+4.89 kg Buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically limits the holding force.

3. Thermal stability

*For standard magnets, the safety limit is 80°C.

Quick Unit Converter

Pulling Force

Kilograms (kg)

Newtons (N)

Pounds (lbs)

Magnetic Induction

Induction (T)

Enter a value in one of the inputs, to see the remaining fields will convert instantly.

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CM PML-6 / N45 - magnetic gripper

1422.00 ZŁ brutto / pcs

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 50x50x10 mm and a weight of 187.5 g, guarantees premium class connection. This rectangular block with a force of 330.92 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 50x50x10 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

The presented product is a neodymium magnet with precisely defined parameters: 50 mm (length), 50 mm (width), and 10 mm (thickness). The key parameter here is the holding force amounting to approximately 33.73 kg (force ~330.92 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of neodymium magnets.

Advantages

Besides their tremendous field intensity, neodymium magnets offer the following advantages:

They do not lose power, even after nearly ten years – the decrease in lifting capacity is only ~1% (theoretically),
They are resistant to demagnetization induced by external magnetic fields,
A magnet with a smooth gold surface looks better,
Magnets are distinguished by extremely high magnetic induction on the outer layer,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to versatility in shaping and the ability to modify to individual projects,
Huge importance in modern industrial fields – they are utilized in data components, electric motors, medical devices, as well as other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in creating threads and complex forms in magnets, we recommend using cover - magnetic mount.
Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these products are able to complicate diagnosis medical after entering the body.
Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Magnet power was determined for ideal contact conditions, taking into account:

using a plate made of mild steel, functioning as a magnetic yoke
possessing a massiveness of minimum 10 mm to ensure full flux closure
with an ground touching surface
without any insulating layer between the magnet and steel
during detachment in a direction perpendicular to the mounting surface
in temp. approx. 20°C

Practical aspects of lifting capacity – factors

In real-world applications, the actual holding force is determined by a number of factors, listed from crucial:

Air gap (betwixt the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Plate thickness – insufficiently thick steel does not close the flux, causing part of the flux to be wasted into the air.
Material type – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
Operating temperature – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets

Nickel coating and allergies

Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, prevent touching magnets with bare hands or choose versions in plastic housing.

Protective goggles

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets leads to them breaking into shards.

Danger to pacemakers

Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Heat sensitivity

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Powerful field

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Dust is flammable

Machining of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Protect data

Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

This is not a toy

Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are tragic.

Finger safety

Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Compass and GPS

Note: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, tablet, and GPS.

Attention! Details about risks in the article: Safety of working with magnets.

MPL 50x50x10 / N38 - lamellar magnet

Not sure about your choice?

MPL 50x50x10 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - data

1. Wall mount (shear)

2. Steel saturation

3. Thermal stability

Pulling Force

Magnetic Induction

Other products

MP 10x4.3x4 / N38 - ring magnet

MW 9.5x1 / N38 - cylindrical magnet

MW 12x3 / N38 - cylindrical magnet

CM PML-6 / N45 - magnetic gripper

Strengths and weaknesses of neodymium magnets.

Advantages

Cons

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Practical aspects of lifting capacity – factors

Nickel coating and allergies

Protective goggles

Danger to pacemakers

Heat sensitivity

Powerful field

Dust is flammable

Protect data

This is not a toy

Finger safety

Compass and GPS

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C