MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

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MPL 40x15x5x2[7/3.5] / 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 020154

GTIN/EAN: 5906301811602

5.00

length

40 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

22.5 g

Magnetization Direction

↑ axial

Load capacity

11.35 kg / 111.37 N

Magnetic Induction

249.11 mT / 2491 Gs

Coating

[NiCuNi] Nickel

technical parameters »

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Technical parameters of the product - MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

Specification / characteristics - MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

properties

properties	values
Cat. no.	020154
GTIN/EAN	5906301811602
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	15 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	22.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	11.35 kg / 111.37 N
Magnetic Induction ~ ?	249.11 mT / 2491 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x15x5x2[7/3.5] / 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

Physical analysis of the assembly - report

The following values represent the outcome of a engineering calculation. Values are based on models for the class Nd₂Fe₁₄B. Actual performance may differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - power drop
MPL 40x15x5x2[7/3.5] / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2490 Gs 249.0 mT	11.35 kg / 25.02 pounds 11350.0 g / 111.3 N	crushing
1 mm	2306 Gs 230.6 mT	9.73 kg / 21.45 pounds 9731.3 g / 95.5 N	medium risk
2 mm	2095 Gs 209.5 mT	8.03 kg / 17.70 pounds 8028.8 g / 78.8 N	medium risk
3 mm	1877 Gs 187.7 mT	6.45 kg / 14.21 pounds 6445.4 g / 63.2 N	medium risk
5 mm	1472 Gs 147.2 mT	3.97 kg / 8.74 pounds 3965.1 g / 38.9 N	medium risk
10 mm	792 Gs 79.2 mT	1.15 kg / 2.53 pounds 1147.1 g / 11.3 N	safe
15 mm	454 Gs 45.4 mT	0.38 kg / 0.83 pounds 376.9 g / 3.7 N	safe
20 mm	278 Gs 27.8 mT	0.14 kg / 0.31 pounds 141.4 g / 1.4 N	safe
30 mm	122 Gs 12.2 mT	0.03 kg / 0.06 pounds 27.0 g / 0.3 N	safe
50 mm	35 Gs 3.5 mT	0.00 kg / 0.01 pounds 2.3 g / 0.0 N	safe

Magnetic force decreases sharply with every mm of distance. Keep in mind that even the smallest gap (e.g., dirt, paint, rust) strongly reduces the pull force. Magnetic products operate strongest in perfect adhesion; distance weakens the force. Analyze how rapidly the load capacity drop, when the magnet does not touch tightly to the steel surface. When calculating the mounting, eliminate additional spacers.

Table 2: Slippage force (wall)
MPL 40x15x5x2[7/3.5] / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.27 kg / 5.00 pounds 2270.0 g / 22.3 N
1 mm	Stal (~0.2)	1.95 kg / 4.29 pounds 1946.0 g / 19.1 N
2 mm	Stal (~0.2)	1.61 kg / 3.54 pounds 1606.0 g / 15.8 N
3 mm	Stal (~0.2)	1.29 kg / 2.84 pounds 1290.0 g / 12.7 N
5 mm	Stal (~0.2)	0.79 kg / 1.75 pounds 794.0 g / 7.8 N
10 mm	Stal (~0.2)	0.23 kg / 0.51 pounds 230.0 g / 2.3 N
15 mm	Stal (~0.2)	0.08 kg / 0.17 pounds 76.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below shows the theoretical holding capacity necessary to cause the slippage of the magnet downwards on a vertical metal surface (considering standard friction coefficient). This value depends on the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 40x15x5x2[7/3.5] / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.41 kg / 7.51 pounds 3405.0 g / 33.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.27 kg / 5.00 pounds 2270.0 g / 22.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.14 kg / 2.50 pounds 1135.0 g / 11.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	5.68 kg / 12.51 pounds 5675.0 g / 55.7 N

When placing a element on a vertical surface (e.g., a car body), it will maintain just about 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip influence the fact that holders move down faster than they pop off the substrate. Designing a vertical fastening? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a noticeably lighter cargo. Using a rubber layer can drastically increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x15x5x2[7/3.5] / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.57 kg / 1.25 pounds 567.5 g / 5.6 N
1 mm	13%	1.42 kg / 3.13 pounds 1418.8 g / 13.9 N
2 mm	25%	2.84 kg / 6.26 pounds 2837.5 g / 27.8 N
3 mm	38%	4.26 kg / 9.38 pounds 4256.3 g / 41.8 N
5 mm	63%	7.09 kg / 15.64 pounds 7093.8 g / 69.6 N
10 mm	100%	11.35 kg / 25.02 pounds 11350.0 g / 111.3 N
11 mm	100%	11.35 kg / 25.02 pounds 11350.0 g / 111.3 N
12 mm	100%	11.35 kg / 25.02 pounds 11350.0 g / 111.3 N

A thin metal plate is not enough to absorb the entire magnetic field, which squanders power of the magnet. If you attach a powerful product to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To achieve 100% of this magnet's power, you need a suitably thick piece of steel. The saturation phenomenon causes that on thin elements (e.g., car bodies), the product shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - power drop
MPL 40x15x5x2[7/3.5] / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	11.35 kg / 25.02 pounds 11350.0 g / 111.3 N	OK
40 °C	-2.2%	11.10 kg / 24.47 pounds 11100.3 g / 108.9 N	OK
60 °C	-4.4%	10.85 kg / 23.92 pounds 10850.6 g / 106.4 N
80 °C	-6.6%	10.60 kg / 23.37 pounds 10600.9 g / 104.0 N
100 °C	-28.8%	8.08 kg / 17.82 pounds 8081.2 g / 79.3 N

Ordinary NdFeB products irreversibly lose strength past the thermal threshold. Protect against heat – high temperature can irreversibly damage this magnet. With every degree above norm, the magnet's force briefly lowers. Refrain from using this magnet close to heaters exceeding its operating temperature limit. Too high temperature will result in permanent loss of magnetism.

*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) may lose charge permanently at lower temperatures than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 40x15x5x2[7/3.5] / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	22.94 kg / 50.58 pounds 3 961 Gs	3.44 kg / 7.59 pounds 3441 g / 33.8 N	N/A
1 mm	21.37 kg / 47.11 pounds 4 807 Gs	3.21 kg / 7.07 pounds 3205 g / 31.4 N	19.23 kg / 42.40 pounds ~0 Gs
2 mm	19.67 kg / 43.37 pounds 4 612 Gs	2.95 kg / 6.50 pounds 2951 g / 28.9 N	17.70 kg / 39.03 pounds ~0 Gs
3 mm	17.94 kg / 39.55 pounds 4 404 Gs	2.69 kg / 5.93 pounds 2691 g / 26.4 N	16.15 kg / 35.59 pounds ~0 Gs
5 mm	14.58 kg / 32.15 pounds 3 971 Gs	2.19 kg / 4.82 pounds 2187 g / 21.5 N	13.12 kg / 28.93 pounds ~0 Gs
10 mm	8.01 kg / 17.67 pounds 2 944 Gs	1.20 kg / 2.65 pounds 1202 g / 11.8 N	7.21 kg / 15.90 pounds ~0 Gs
20 mm	2.32 kg / 5.11 pounds 1 583 Gs	0.35 kg / 0.77 pounds 348 g / 3.4 N	2.09 kg / 4.60 pounds ~0 Gs
50 mm	0.12 kg / 0.26 pounds 359 Gs	0.02 kg / 0.04 pounds 18 g / 0.2 N	0.11 kg / 0.24 pounds ~0 Gs
60 mm	0.05 kg / 0.12 pounds 243 Gs	0.01 kg / 0.02 pounds 8 g / 0.1 N	0.05 kg / 0.11 pounds ~0 Gs
70 mm	0.03 kg / 0.06 pounds 171 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
80 mm	0.01 kg / 0.03 pounds 124 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
90 mm	0.01 kg / 0.02 pounds 92 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.01 pounds 70 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets attract each other from a significantly greater distance than a magnet and sheet combination. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of performance. Want to build a powerful holder? Apply two magnets instead of one magnet and a steel. Be careful that when bringing together two magnets, the impact force is extreme. The repulsion force is marginally weaker than the connection force, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Important: Calculations demonstrate shear force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - warnings
MPL 40x15x5x2[7/3.5] / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.5 cm
Hearing aid	10 Gs (1.0 mT)	8.0 cm
Timepiece	20 Gs (2.0 mT)	6.5 cm
Mobile device	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a real danger to electronic devices and medical implants. These neodymiums produce a field that disrupts operation of digital equipment. Remember: the unseen radiation acts through matter and plastic. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x15x5x2[7/3.5] / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	24.04 km/h (6.68 m/s)	0.50 J
30 mm	39.29 km/h (10.91 m/s)	1.34 J
50 mm	50.66 km/h (14.07 m/s)	2.23 J
100 mm	71.63 km/h (19.90 m/s)	4.45 J

Magnetic elements are very brittle – a collision with steel risks their cracking. Watch the impact speed – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't hit violently against the metal. A collision at high speed ends with a crack of the magnet. Wear eye protection when handling with large magnets.

Table 9: Corrosion resistance
MPL 40x15x5x2[7/3.5] / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MPL 40x15x5x2[7/3.5] / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	14 969 Mx	149.7 µWb
P_c Coefficient	0.26	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data for generator designers as well as sensors. P_c value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 40x15x5x2[7/3.5] / N38

Environment	Effective steel pull	Effect
Air (land)	11.35 kg	Standard
Water (riverbed)	13.00 kg (+1.65 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!

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

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Thermal stability

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.26

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.

Technical specification and ecology

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%

Ecology and recycling (GPSR)

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: 020154-2026

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Component MPL 40x15x5x2[7/3.5] / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 11.35 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

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 40x15x5x2[7/3.5] / 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. Thanks to the flat surface and high force (approx. 11.35 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.

For mounting flat magnets MPL 40x15x5x2[7/3.5] / N38, it is best to use two-component adhesives (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. 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 40x15x5x2[7/3.5] / N38 model is magnetized through the thickness (dimension 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.

This model is characterized by dimensions 40x15x5 mm, which, at a weight of 22.5 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 11.35 kg (force ~111.37 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:

They retain magnetic properties for almost ten years – the drop is just ~1% (based on simulations),
They do not lose their magnetic properties even under strong external field,
Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver gives an modern appearance,
Magnets have very high magnetic induction on the active area,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Possibility of accurate creating and adapting to complex needs,
Versatile presence in electronics industry – they are utilized in magnetic memories, electromotive mechanisms, precision medical tools, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Limited ability of creating threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, small components of these products are able to complicate diagnosis medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Breakaway force was determined for the most favorable conditions, including:

with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
with a cross-section of at least 10 mm
with a plane perfectly flat
with total lack of distance (without impurities)
during detachment in a direction vertical to the plane
at room temperature

Impact of factors on magnetic holding capacity in practice

In real-world applications, the actual holding force depends on many variables, presented from most significant:

Distance (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Material composition – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

Safety rules for work with NdFeB magnets

Health Danger

Individuals with a pacemaker have to maintain an large gap from magnets. The magnetic field can stop the operation of the implant.

Do not underestimate power

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Pinching danger

Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Protective gloves are recommended.

Electronic hazard

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.

Do not give to children

These products are not suitable for play. Swallowing multiple magnets can lead to them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.

Nickel allergy

It is widely known that the nickel plating (the usual finish) is a common allergen. If you have an allergy, prevent direct skin contact and opt for encased magnets.

Combustion hazard

Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Power loss in heat

Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Impact on smartphones

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.

Magnet fragility

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

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

MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

Technical parameters of the product - MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - report

Table 1: Static pull force (force vs distance) - power drop MPL 40x15x5x2[7/3.5] / N38

Table 2: Slippage force (wall) MPL 40x15x5x2[7/3.5] / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MPL 40x15x5x2[7/3.5] / N38

Table 4: Material efficiency (saturation) - sheet metal selection MPL 40x15x5x2[7/3.5] / N38

Table 5: Thermal resistance (stability) - power drop MPL 40x15x5x2[7/3.5] / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MPL 40x15x5x2[7/3.5] / N38

Table 7: Hazards (electronics) - warnings MPL 40x15x5x2[7/3.5] / N38

Table 8: Impact energy (kinetic energy) - collision effects MPL 40x15x5x2[7/3.5] / N38

Table 9: Corrosion resistance MPL 40x15x5x2[7/3.5] / N38

Table 10: Construction data (Pc) MPL 40x15x5x2[7/3.5] / N38

Table 11: Underwater work (magnet fishing) MPL 40x15x5x2[7/3.5] / N38

1. Sliding resistance

2. Plate thickness effect

3. Thermal stability

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

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RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

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MT 50x1.5x50000 - magnetic tape

MW 15x5 / N38 - cylindrical magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Disadvantages

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Safety rules for work with NdFeB magnets

Health Danger

Do not underestimate power

Pinching danger

Electronic hazard

Do not give to children

Nickel allergy

Combustion hazard

Power loss in heat

Impact on smartphones

Magnet fragility

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MPL 40x15x5x2[7/3.5] / N38

Table 2: Slippage force (wall)
MPL 40x15x5x2[7/3.5] / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 40x15x5x2[7/3.5] / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x15x5x2[7/3.5] / N38

Table 5: Thermal resistance (stability) - power drop
MPL 40x15x5x2[7/3.5] / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 40x15x5x2[7/3.5] / N38

Table 7: Hazards (electronics) - warnings
MPL 40x15x5x2[7/3.5] / N38

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x15x5x2[7/3.5] / N38

Table 9: Corrosion resistance
MPL 40x15x5x2[7/3.5] / N38

Table 10: Construction data (P_c)
MPL 40x15x5x2[7/3.5] / N38

Table 11: Underwater work (magnet fishing)
MPL 40x15x5x2[7/3.5] / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.