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MPL 40x7x3 / N38 - lamellar magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

lamellar magnet

Catalog no 020162

GTIN/EAN: 5906301811688

5.00

length

40 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.3 g

Magnetization Direction

↑ axial

Load capacity

7.14 kg / 70.02 N

Magnetic Induction

284.46 mT / 2845 Gs

Coating

[NiCuNi] Nickel

check parameters »

2.79 ZŁ with VAT / pcs + price for transport

2.27 ZŁ net + 23% VAT / pcs

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Detailed specification - MPL 40x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 40x7x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020162
GTIN/EAN	5906301811688
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	40 mm [±0,1 mm]
Width	7 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	6.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.14 kg / 70.02 N
Magnetic Induction ~ ?	284.46 mT / 2845 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x7x3 / N38 - lamellar magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
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 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Technical simulation of the magnet - technical parameters

These information constitute the result of a mathematical calculation. Results rely on models for the material Nd₂Fe₁₄B. Operational parameters might slightly differ from theoretical values. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - characteristics
MPL 40x7x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2843 Gs 284.3 mT	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N	medium risk
1 mm	2314 Gs 231.4 mT	4.73 kg / 10.43 pounds 4729.9 g / 46.4 N	medium risk
2 mm	1788 Gs 178.8 mT	2.83 kg / 6.23 pounds 2825.3 g / 27.7 N	medium risk
3 mm	1365 Gs 136.5 mT	1.65 kg / 3.63 pounds 1645.1 g / 16.1 N	low risk
5 mm	824 Gs 82.4 mT	0.60 kg / 1.32 pounds 599.2 g / 5.9 N	low risk
10 mm	317 Gs 31.7 mT	0.09 kg / 0.20 pounds 88.6 g / 0.9 N	low risk
15 mm	160 Gs 16.0 mT	0.02 kg / 0.05 pounds 22.5 g / 0.2 N	low risk
20 mm	92 Gs 9.2 mT	0.01 kg / 0.02 pounds 7.5 g / 0.1 N	low risk
30 mm	38 Gs 3.8 mT	0.00 kg / 0.00 pounds 1.3 g / 0.0 N	low risk
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	low risk

Magnetic force weakens drastically with every mm of gap. Note that even a microscopic distance (e.g., dirt, paint, veneer) strongly diminishes the holding power. Neodymiums work optimally at the point of direct contact; air break drastically cuts the power. Observe how rapidly the parameters plummet, when the product does not touch tightly to the steel surface. When designing the assembly, discard unnecessary gaps.

Table 2: Slippage force (vertical surface)
MPL 40x7x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.15 pounds 1428.0 g / 14.0 N
1 mm	Stal (~0.2)	0.95 kg / 2.09 pounds 946.0 g / 9.3 N
2 mm	Stal (~0.2)	0.57 kg / 1.25 pounds 566.0 g / 5.6 N
3 mm	Stal (~0.2)	0.33 kg / 0.73 pounds 330.0 g / 3.2 N
5 mm	Stal (~0.2)	0.12 kg / 0.26 pounds 120.0 g / 1.2 N
10 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below calculates the approximate shear load sufficient to initiate the sliding of the magnet down on a vertical metal surface (considering standard friction). This value is relative to the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 40x7x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.14 kg / 4.72 pounds 2142.0 g / 21.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.15 pounds 1428.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.71 kg / 1.57 pounds 714.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.57 kg / 7.87 pounds 3570.0 g / 35.0 N

When mounting a holder on a vertical wall (e.g., a car body), it will only hold just approx. 1/5 of its nominal power. Gravitational force and a weak degree of grip mean that magnets slip easier than they pop off the substrate. Designing a wall mount? Remember that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slide down under a noticeably lighter cargo. Using a rubber coating can drastically improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MPL 40x7x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.71 kg / 1.57 pounds 714.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.94 pounds 1785.0 g / 17.5 N
2 mm	50%	3.57 kg / 7.87 pounds 3570.0 g / 35.0 N
3 mm	75%	5.35 kg / 11.81 pounds 5355.0 g / 52.5 N
5 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
10 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
11 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
12 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N

A too thin steel is not enough to absorb the full magnetic flux, which wastes potential of the holder. If you mount a strong magnet to a weak sheet, the field will penetrate right through and the pull force will drop sharply. To squeeze full efficiency of this magnet's potential, you require a sufficiently solid piece of steel. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We recommend selecting the steel dimension according to the table below.

Table 5: Working in heat (stability) - resistance threshold
MPL 40x7x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N	OK
40 °C	-2.2%	6.98 kg / 15.39 pounds 6982.9 g / 68.5 N	OK
60 °C	-4.4%	6.83 kg / 15.05 pounds 6825.8 g / 67.0 N
80 °C	-6.6%	6.67 kg / 14.70 pounds 6668.8 g / 65.4 N
100 °C	-28.8%	5.08 kg / 11.21 pounds 5083.7 g / 49.9 N

Ordinary NdFeB products change their properties strength above the temperature limit. Watch out for overheating – heat can permanently destroy this product. With every degree above norm, the magnet's force briefly lowers. Do not use this product near heat sources higher than its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.

*Important note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) may lose charge permanently at lower temperatures than long magnets. Warning indicator in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MPL 40x7x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.95 kg / 30.75 pounds 4 204 Gs	2.09 kg / 4.61 pounds 2092 g / 20.5 N	N/A
1 mm	11.58 kg / 25.53 pounds 5 180 Gs	1.74 kg / 3.83 pounds 1737 g / 17.0 N	10.42 kg / 22.98 pounds ~0 Gs
2 mm	9.24 kg / 20.37 pounds 4 628 Gs	1.39 kg / 3.06 pounds 1386 g / 13.6 N	8.32 kg / 18.34 pounds ~0 Gs
3 mm	7.19 kg / 15.86 pounds 4 083 Gs	1.08 kg / 2.38 pounds 1079 g / 10.6 N	6.47 kg / 14.27 pounds ~0 Gs
5 mm	4.21 kg / 9.28 pounds 3 124 Gs	0.63 kg / 1.39 pounds 632 g / 6.2 N	3.79 kg / 8.36 pounds ~0 Gs
10 mm	1.17 kg / 2.58 pounds 1 647 Gs	0.18 kg / 0.39 pounds 176 g / 1.7 N	1.05 kg / 2.32 pounds ~0 Gs
20 mm	0.17 kg / 0.38 pounds 633 Gs	0.03 kg / 0.06 pounds 26 g / 0.3 N	0.16 kg / 0.34 pounds ~0 Gs
50 mm	0.01 kg / 0.01 pounds 115 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.01 pounds 76 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 53 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 38 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 28 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 21 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets interact from a wider radius than a neodymium and metal setup. Such a system of two magnets creates a more powerful interaction and a further horizon of operation. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is massive. The levitation is slightly lower than the attraction, but still large.
*Flux density in repulsion mode is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
Attention: Results demonstrate sliding force of two same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - warnings
MPL 40x7x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Mechanical watch	20 Gs (2.0 mT)	4.0 cm
Mobile device	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation is a serious hazard to electronic devices and pacemakers. These magnets generate a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MPL 40x7x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	34.21 km/h (9.50 m/s)	0.28 J
30 mm	58.81 km/h (16.34 m/s)	0.84 J
50 mm	75.92 km/h (21.09 m/s)	1.40 J
100 mm	107.36 km/h (29.82 m/s)	2.80 J

Magnetic elements are prone to chipping – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or injury to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Surface protection spec
MPL 40x7x3 / 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 following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MPL 40x7x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 379 Mx	63.8 µWb
P_c Coefficient	0.24	Low (Flat)

Flux value passing through the magnet pole. Essential parameter when building generators and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 40x7x3 / N38

Environment	Effective steel pull	Effect
Air (land)	7.14 kg	Standard
Water (riverbed)	8.18 kg (+1.04 kg buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) significantly reduces the holding force.

3. Heat tolerance

*For N38 material, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.24

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Engineering data and GPSR

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 020162-2026

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x7x3 mm and a weight of 6.3 g, guarantees the highest quality connection. This magnetic block with a force of 70.02 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.

The key to success is sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 40x7x3 / 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.

Plate magnets MPL 40x7x3 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 7.14 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

For mounting flat magnets MPL 40x7x3 / N38, we recommend utilizing strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

Standardly, the MPL 40x7x3 / N38 model is magnetized through the thickness (dimension 3 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (40x7 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.

The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 7 mm (width), and 3 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 7.14 kg (force ~70.02 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of rare earth magnets.

Advantages

Besides their immense strength, neodymium magnets offer the following advantages:

Their strength is maintained, and after around 10 years it drops only by ~1% (theoretically),
Neodymium magnets are distinguished by highly resistant to demagnetization caused by external field sources,
The use of an refined finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Magnetic induction on the working layer of the magnet turns out to be maximum,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of detailed machining as well as adjusting to defined needs,
Wide application in electronics industry – they are utilized in data components, brushless drives, precision medical tools, and technologically advanced constructions.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Disadvantages

What to avoid - cons of neodymium magnets: tips and applications.

To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
Due to limitations in producing nuts and complex forms in magnets, we propose using cover - magnetic holder.
Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

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

Magnet power is the result of a measurement for optimal configuration, taking into account:

on a block made of mild steel, perfectly concentrating the magnetic flux
with a cross-section no less than 10 mm
with an polished contact surface
with total lack of distance (without coatings)
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by working environment parameters, mainly (from priority):

Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Angle of force application – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Chemical composition of the base – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and holding force.
Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a small distance between the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets

Respect the power

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

Warning for heart patients

People with a pacemaker must keep an large gap from magnets. The magnetic field can stop the operation of the life-saving device.

Avoid contact if allergic

Medical facts indicate that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and opt for versions in plastic housing.

Magnetic interference

GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Hand protection

Pinching hazard: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Mechanical processing

Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Maximum temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.

Cards and drives

Do not bring magnets near a wallet, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Keep away from children

NdFeB magnets are not suitable for play. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates immediate surgery.

Warning! More info about hazards in the article: Safety of working with magnets.

MPL 40x7x3 / N38 - lamellar magnet

Detailed specification - MPL 40x7x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the magnet - technical parameters

Table 1: Static force (force vs distance) - characteristics MPL 40x7x3 / N38

Table 2: Slippage force (vertical surface) MPL 40x7x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MPL 40x7x3 / N38

Table 4: Steel thickness (substrate influence) - power losses MPL 40x7x3 / N38

Table 5: Working in heat (stability) - resistance threshold MPL 40x7x3 / N38

Table 6: Two magnets (repulsion) - forces in the system MPL 40x7x3 / N38

Table 7: Hazards (electronics) - warnings MPL 40x7x3 / N38

Table 8: Collisions (kinetic energy) - collision effects MPL 40x7x3 / N38

Table 9: Surface protection spec MPL 40x7x3 / N38

Table 10: Construction data (Flux) MPL 40x7x3 / N38

Table 11: Physics of underwater searching MPL 40x7x3 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Heat tolerance

4. Demagnetization curve and operating point (B-H)

Chemical composition

Sustainability

Magnet pull force

Magnetic Field

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Advantages and disadvantages of rare earth magnets.

Advantages

Disadvantages

Pull force analysis

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

Practical lifting capacity: influencing factors

Safe handling of neodymium magnets

Respect the power

Warning for heart patients

Avoid contact if allergic

Magnetic interference

Hand protection

Eye protection

Mechanical processing

Maximum temperature

Cards and drives

Keep away from children

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - characteristics
MPL 40x7x3 / N38

Table 2: Slippage force (vertical surface)
MPL 40x7x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 40x7x3 / N38

Table 4: Steel thickness (substrate influence) - power losses
MPL 40x7x3 / N38

Table 5: Working in heat (stability) - resistance threshold
MPL 40x7x3 / N38

Table 6: Two magnets (repulsion) - forces in the system
MPL 40x7x3 / N38

Table 7: Hazards (electronics) - warnings
MPL 40x7x3 / N38

Table 8: Collisions (kinetic energy) - collision effects
MPL 40x7x3 / N38

Table 9: Surface protection spec
MPL 40x7x3 / N38

Table 10: Construction data (Flux)
MPL 40x7x3 / N38

Table 11: Physics of underwater searching
MPL 40x7x3 / N38