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MPL 10x4x1.5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020113

GTIN: 5906301811190

5.00

length

10 mm [±0,1 mm]

Width

4 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.45 g

Magnetization Direction

↑ axial

Load capacity

0.88 kg / 8.65 N

Magnetic Induction

274.96 mT / 2750 Gs

Coating

[NiCuNi] Nickel

0.246 ZŁ with VAT / pcs + price for transport

0.200 ZŁ net + 23% VAT / pcs

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MPL 10x4x1.5 / N38 - lamellar magnet

Specification / characteristics MPL 10x4x1.5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020113
GTIN	5906301811190
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	10 mm [±0,1 mm]
Width	4 mm [±0,1 mm]
Height	1.5 mm [±0,1 mm]
Weight	0.45 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.88 kg / 8.65 N
Magnetic Induction ~ ?	274.96 mT / 2750 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 10x4x1.5 / 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

Engineering modeling of the magnet - technical parameters

These data are the result of a mathematical analysis. Values are based on algorithms for the material NdFeB. Operational performance might slightly differ from theoretical values. Treat these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
MPL 10x4x1.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2747 Gs 274.7 mT	0.88 kg / 880.0 g 8.6 N	low risk
1 mm	1882 Gs 188.2 mT	0.41 kg / 413.1 g 4.1 N	low risk
2 mm	1175 Gs 117.5 mT	0.16 kg / 161.0 g 1.6 N	low risk
3 mm	746 Gs 74.6 mT	0.06 kg / 64.9 g 0.6 N	low risk
5 mm	337 Gs 33.7 mT	0.01 kg / 13.3 g 0.1 N	low risk
10 mm	77 Gs 7.7 mT	0.00 kg / 0.7 g 0.0 N	low risk
15 mm	27 Gs 2.7 mT	0.00 kg / 0.1 g 0.0 N	low risk
20 mm	12 Gs 1.2 mT	0.00 kg / 0.0 g 0.0 N	low risk
30 mm	4 Gs 0.4 mT	0.00 kg / 0.0 g 0.0 N	low risk
50 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	low risk

Magnetic force decreases significantly with every mm of spacing. Note that even the smallest gap (e.g., contamination, varnish, dust) strongly weakens the grip. Magnetic products hold optimally at the point of direct contact; gap weakens the power. See how quickly the load capacity plummet, when the magnet does not adhere flatly to the steel surface. When designing the arrangement, avoid additional spacers.

Table 2: Vertical Force (Vertical Surface)
MPL 10x4x1.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.18 kg / 176.0 g 1.7 N
1 mm	Stal (~0.2)	0.08 kg / 82.0 g 0.8 N
2 mm	Stal (~0.2)	0.03 kg / 32.0 g 0.3 N
3 mm	Stal (~0.2)	0.01 kg / 12.0 g 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The table below defines the approximate weight limit needed to initiate the downward movement of the magnet vertically on a upright metal surface (considering typical friction). This value is a function of the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MPL 10x4x1.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.26 kg / 264.0 g 2.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.18 kg / 176.0 g 1.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.09 kg / 88.0 g 0.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.44 kg / 440.0 g 4.3 N

When hanging a holder on a upright surface (e.g., a fridge), it you can count on just approx. 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip mean that holders slide down easier than they pull off. Planning a vertical fastening? Note that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the holder will slip down under a much lighter load. Using a rubber pad can effectively improve the result.

Table 4: Material efficiency (saturation) - power losses
MPL 10x4x1.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.09 kg / 88.0 g 0.9 N
1 mm	25%	0.22 kg / 220.0 g 2.2 N
2 mm	50%	0.44 kg / 440.0 g 4.3 N
5 mm	100%	0.88 kg / 880.0 g 8.6 N
10 mm	100%	0.88 kg / 880.0 g 8.6 N

A thin sheet is not enough to conduct the full magnetic flux, which wastes potential of the magnet. Should you install a neodymium to a weak sheet, the field will pass right through and the attraction force will be weaker. To achieve full efficiency of this neodymium's potential, you need a suitably thick backing of steel. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the holder shows lower pull force. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MPL 10x4x1.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.88 kg / 880.0 g 8.6 N	OK
40 °C	-2.2%	0.86 kg / 860.6 g 8.4 N	OK
60 °C	-4.4%	0.84 kg / 841.3 g 8.3 N
80 °C	-6.6%	0.82 kg / 821.9 g 8.1 N
100 °C	-28.8%	0.63 kg / 626.6 g 6.1 N

Classic neodymiums change their properties parameters above the temperature limit. Avoid high temperatures – high temperature can permanently demagnetize this product. As the temperature rises, the neodymium's capacity temporarily lowers. Refrain from using this product close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will result in permanent loss of magnetism.

*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress compared to rod magnets. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MPL 10x4x1.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	4.47 kg / 4468 g 43.8 N 12 379 Gs	N/A
1 mm	0.41 kg / 413 g 4.1 N 4 661 Gs	0.37 kg / 372 g 3.6 N ~0 Gs
2 mm	0.16 kg / 161 g 1.6 N 3 764 Gs	0.14 kg / 145 g 1.4 N ~0 Gs
3 mm	0.06 kg / 65 g 0.6 N 2 978 Gs	0.06 kg / 58 g 0.6 N ~0 Gs
5 mm	0.01 kg / 13 g 0.1 N 1 864 Gs	0.01 kg / 12 g 0.1 N ~0 Gs
10 mm	0.00 kg / 1 g 0.0 N 675 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
20 mm	0.00 kg / 0 g 0.0 N 154 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 13 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a wider radius than a neodymium and metal combination. Such a system of magnet-to-magnet generates a stronger field and a further horizon of operation. Designing a strong closure? Apply two magnets instead of a neodymium and a striker plate. Be careful that when attracting two neodymiums, the impact force is extreme. The repulsion force is slightly lower than the attraction, but still large.
*Flux density for N-N configuration drops to ~0 Gs at the geometric center between the magnets (due to field cancellation).

Table 7: Hazards (implants) - warnings
MPL 10x4x1.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation poses a large risk to electronics and pacemakers. These neodymiums produce a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation passes through tissues and housings. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MPL 10x4x1.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	44.62 km/h (12.39 m/s)	0.03 J
30 mm	77.25 km/h (21.46 m/s)	0.10 J
50 mm	99.72 km/h (27.70 m/s)	0.17 J
100 mm	141.03 km/h (39.18 m/s)	0.35 J

NdFeB products are very brittle – a strong collision with metal risks their cracking. Watch the impact speed – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or injury to fingers. Always hold the magnet during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Corrosion resistance
MPL 10x4x1.5 / 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)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Design data (Flux)
MPL 10x4x1.5 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	1 104 Mx	11.0 µWb
Współczynnik Pc	0.30	Niski (Płaski)

Total magnetic flux flowing through the pole face. Essential parameter for motor design and Hall effect devices. Pc Factor defines the working geometry.

Table 11: Physics of underwater searching
MPL 10x4x1.5 / N38

Environment	Effective steel pull	Effect
Air (land)	0.88 kg	Standard
Water (riverbed)	1.01 kg (+0.13 kg Buoyancy gain)	+14.5%

Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

Quick Unit Converter

Force (Pull)

Force in kg

Force in lbs

Field Strength

Induction (T)

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This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 10x4x1.5 mm and a weight of 0.45 g, guarantees premium class connection. This magnetic block with a force of 8.65 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 10x4x1.5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.

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. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.

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 clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

Standardly, the MPL 10x4x1.5 / N38 model is magnetized through the thickness (dimension 1.5 mm), which means that the N and S poles are located on its largest, flat surfaces. 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: 10 mm (length), 4 mm (width), and 1.5 mm (thickness). It is a magnetic block with dimensions 10x4x1.5 mm and a self-weight of 0.45 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They do not lose magnetism, even over around 10 years – the decrease in lifting capacity is only ~1% (theoretically),
They are extremely resistant to demagnetization induced by presence of other magnetic fields,
A magnet with a smooth silver surface is more attractive,
The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to modularity in shaping and the ability to customize to client solutions,
Versatile presence in modern industrial fields – they find application in magnetic memories, electromotive mechanisms, medical equipment, as well as modern systems.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Cons of neodymium magnets: application proposals

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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 corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
We suggest cover - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to complicate diagnosis medical in case of swallowing.
Due to neodymium price, their price exceeds standard values,

Magnetic strength at its maximum – what contributes to it?

Magnet power was determined for optimal configuration, assuming:

on a plate made of structural steel, effectively closing the magnetic field
whose thickness is min. 10 mm
with a plane free of scratches
with total lack of distance (without paint)
during pulling in a direction vertical to the mounting surface
at ambient temperature room level

What influences lifting capacity in practice

Please note that the application force may be lower influenced by the following factors, starting with the most relevant:

Distance – the presence of any layer (rust, tape, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

* Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap {between} the magnet and the plate lowers the holding force.

Safe handling of NdFeB magnets

Magnets are brittle

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Sensitization to coating

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.

Machining danger

Machining of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Caution required

Handle magnets consciously. Their immense force can surprise even experienced users. Plan your moves and respect their force.

Precision electronics

An intense magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.

Do not give to children

These products are not toys. Eating a few magnets may result in them attracting across intestines, which poses a direct threat to life and requires immediate surgery.

Thermal limits

Keep cool. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Bone fractures

Large magnets can break fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

Implant safety

Individuals with a heart stimulator should maintain an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.

Threat to electronics

Avoid bringing magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Safety First!

Learn more about hazards in the article: Safety of working with magnets.

MPL 10x4x1.5 / N38 - lamellar magnet

MPL 10x4x1.5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the magnet - technical parameters

Force (Pull)

Field Strength

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Advantages and disadvantages of neodymium magnets.

Magnetic strength at its maximum – what contributes to it?

What influences lifting capacity in practice

Safe handling of NdFeB magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C