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MPL 20x5x5 / N38 - lamellar magnet

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

lamellar magnet

Catalog no 020132

GTIN/EAN: 5906301811381

5.00

Load capacity 4.42 kg / 43.32 N Magnetic Induction 456.78 mT / 4568 Gs

length: 20 mm [±0,1 mm]
Width: 5 mm [±0,1 mm]
Height: 5 mm [±0,1 mm]
Weight: 3.75 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

How much will a block magnet really hold?

The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.

What is the maximum working temperature?

Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.

What safety factor should I allow?

At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - MPL 20x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 20x5x5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020132
GTIN/EAN	5906301811381
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	20 mm [±0,1 mm]
Width	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	3.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.42 kg / 43.32 N
Magnetic Induction ~ ?	456.78 mT / 4568 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x5x5 / N38 - lamellar magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working 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	310	°C
Curie Temperature TF	590	°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

Engineering modeling of the assembly - report

The following values are the direct effect of a engineering analysis. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance may differ from theoretical values. Use these calculations as a reference point for designers.

Table 1: Static force (force vs distance) - interaction chart
MPL 20x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4563 Gs 456.3 mT	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N	strong
1 mm	3323 Gs 332.3 mT	2.34 kg / 5.17 lbs 2344.7 g / 23.0 N	strong
2 mm	2341 Gs 234.1 mT	1.16 kg / 2.56 lbs 1163.0 g / 11.4 N	weak grip
3 mm	1678 Gs 167.8 mT	0.60 kg / 1.32 lbs 597.4 g / 5.9 N	weak grip
5 mm	944 Gs 94.4 mT	0.19 kg / 0.42 lbs 189.2 g / 1.9 N	weak grip
10 mm	320 Gs 32.0 mT	0.02 kg / 0.05 lbs 21.7 g / 0.2 N	weak grip
15 mm	141 Gs 14.1 mT	0.00 kg / 0.01 lbs 4.2 g / 0.0 N	weak grip
20 mm	73 Gs 7.3 mT	0.00 kg / 0.00 lbs 1.1 g / 0.0 N	weak grip
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	weak grip
50 mm	7 Gs 0.7 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip

Pulling power decreases significantly with every mm of spacing. Remember that even the smallest gap (e.g., contamination, varnish, veneer) significantly diminishes the holding power. Magnetic products hold strongest during direct contact; distance drastically cuts the force. Observe how quickly the parameters fall, when the product does not adhere flatly to the metal substrate. When calculating the assembly, discard additional spacers.

Table 2: Vertical capacity (vertical surface)
MPL 20x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.88 kg / 1.95 lbs 884.0 g / 8.7 N
1 mm	Stal (~0.2)	0.47 kg / 1.03 lbs 468.0 g / 4.6 N
2 mm	Stal (~0.2)	0.23 kg / 0.51 lbs 232.0 g / 2.3 N
3 mm	Stal (~0.2)	0.12 kg / 0.26 lbs 120.0 g / 1.2 N
5 mm	Stal (~0.2)	0.04 kg / 0.08 lbs 38.0 g / 0.4 N
10 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

This section presents the approximate holding capacity necessary to cause the slippage of the magnet downwards along a vertical metal surface (assuming typical friction coefficient). The holding force varies with the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MPL 20x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.33 kg / 2.92 lbs 1326.0 g / 13.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.88 kg / 1.95 lbs 884.0 g / 8.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.44 kg / 0.97 lbs 442.0 g / 4.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.21 kg / 4.87 lbs 2210.0 g / 21.7 N

When mounting a magnet on a vertical surface (e.g., a board), it will maintain just approx. 1/5 of its nominal power. Gravity and a weak degree of grip influence the fact that holders slide down easier than they detach. Designing a hanger? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will slide down under a noticeably lighter load. Utilizing a rubberized pad can drastically improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.44 kg / 0.97 lbs 442.0 g / 4.3 N
1 mm	25%	1.11 kg / 2.44 lbs 1105.0 g / 10.8 N
2 mm	50%	2.21 kg / 4.87 lbs 2210.0 g / 21.7 N
3 mm	75%	3.32 kg / 7.31 lbs 3315.0 g / 32.5 N
5 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
10 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
11 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
12 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N

A thin metal plate is incapable of focus the full magnetic flux, which weakens actual performance of the holder. Should you install a neodymium to a weak sheet, the flux will penetrate right through and the holding will be smaller. To utilize full efficiency of this magnet's potential, you need a suitably thick element of metal. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the product shows lower pull force. We advise picking the steel thickness from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
MPL 20x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N	OK
40 °C	-2.2%	4.32 kg / 9.53 lbs 4322.8 g / 42.4 N	OK
60 °C	-4.4%	4.23 kg / 9.32 lbs 4225.5 g / 41.5 N
80 °C	-6.6%	4.13 kg / 9.10 lbs 4128.3 g / 40.5 N
100 °C	-28.8%	3.15 kg / 6.94 lbs 3147.0 g / 30.9 N

Standard neodymium magnets change their properties power after exceeding the maximum temperature. Protect against heat – heat can permanently damage this product. As the temperature rises, the magnet's power temporarily decreases. Avoid using this product in hot environments higher than its safe range. Ignoring the limit will result in destruction of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties sooner compared to rod magnets. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field range
MPL 20x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	12.84 kg / 28.30 lbs 5 504 Gs	1.93 kg / 4.24 lbs 1925 g / 18.9 N	N/A
1 mm	9.53 kg / 21.01 lbs 7 864 Gs	1.43 kg / 3.15 lbs 1430 g / 14.0 N	8.58 kg / 18.91 lbs ~0 Gs
2 mm	6.81 kg / 15.01 lbs 6 647 Gs	1.02 kg / 2.25 lbs 1021 g / 10.0 N	6.13 kg / 13.51 lbs ~0 Gs
3 mm	4.79 kg / 10.57 lbs 5 577 Gs	0.72 kg / 1.59 lbs 719 g / 7.1 N	4.31 kg / 9.51 lbs ~0 Gs
5 mm	2.40 kg / 5.30 lbs 3 949 Gs	0.36 kg / 0.79 lbs 360 g / 3.5 N	2.16 kg / 4.77 lbs ~0 Gs
10 mm	0.55 kg / 1.21 lbs 1 888 Gs	0.08 kg / 0.18 lbs 82 g / 0.8 N	0.49 kg / 1.09 lbs ~0 Gs
20 mm	0.06 kg / 0.14 lbs 640 Gs	0.01 kg / 0.02 lbs 9 g / 0.1 N	0.06 kg / 0.13 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 84 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.00 lbs 53 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
70 mm	0.00 kg / 0.00 lbs 35 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
80 mm	0.00 kg / 0.00 lbs 24 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
90 mm	0.00 kg / 0.00 lbs 18 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.00 lbs 13 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnetic products interact from a wider radius than a magnet and sheet setup. Such a system of two magnets creates a more powerful interaction and a larger range of action. Designing a solid fastener? Apply two magnets instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the pinch force is huge. The levitation is slightly lower than the connection force, but still impressive.
*The magnetic induction between like poles is approximately ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Attention: Calculations show friction force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MPL 20x5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.0 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Timepiece	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field is a real danger to electronic devices as well as pacemakers. These neodymiums generate a flux that destroys function of sensitive medical devices. Be aware: the unseen radiation passes through tissues and housings. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MPL 20x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.66 km/h (6.02 m/s)	0.07 J
30 mm	21.76 km/h (6.05 m/s)	0.07 J
50 mm	21.76 km/h (6.04 m/s)	0.07 J
100 mm	21.77 km/h (6.05 m/s)	0.07 J

NdFeB products are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Kinetic force can cause material chips or dangerous crushing to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 20x5x5 / 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: Construction data (Flux)
MPL 20x5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 204 Mx	42.0 µWb
P_c Coefficient	0.54	Low (Flat)

Flux value passing through the magnet pole. Essential parameter when building generators as well as sensors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
MPL 20x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	4.42 kg	Standard
Water (riverbed)	5.06 kg (+0.64 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. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely a fraction of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.54

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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

Material specification

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%

Environmental data

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: 020132-2026

Measurement Calculator

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MPL 50x25x12 / N38 - lamellar magnet

45.51 zł brutto / pcs

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 20x5x5 mm and a weight of 3.75 g, guarantees the highest quality connection. This magnetic block with a force of 43.32 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.

Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 4.42 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 20x5x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 4.42 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.

For mounting flat magnets MPL 20x5x5 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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.

Standardly, the MPL 20x5x5 / 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. In practice, this means that this magnet has the greatest attraction force on its main planes (20x5 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.

This model is characterized by dimensions 20x5x5 mm, which, at a weight of 3.75 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 4.42 kg (force ~43.32 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 Nd₂Fe₁₄B magnets.

Benefits

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

They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
Magnets perfectly resist against demagnetization caused by foreign field sources,
By applying a smooth layer of gold, the element acquires an nice look,
The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Thanks to flexibility in forming and the ability to adapt to client solutions,
Huge importance in electronics industry – they are commonly used in data components, brushless drives, advanced medical instruments, and other advanced devices.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of NdFeB magnets:

Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in creating threads and complex shapes in magnets, we propose using cover - magnetic mechanism.
Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Holding force of 4.42 kg is a theoretical maximum value performed under the following configuration:

on a base made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of at least 10 mm to avoid saturation
with a surface cleaned and smooth
under conditions of no distance (surface-to-surface)
for force acting at a right angle (pull-off, not shear)
in neutral thermal conditions

Practical aspects of lifting capacity – factors

It is worth knowing that the magnet holding may be lower depending on the following factors, in order of importance:

Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Material type – the best choice is high-permeability steel. Cast iron may attract less.
Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Warnings

Machining danger

Powder generated during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Hand protection

Danger of trauma: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Impact on smartphones

Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Warning for heart patients

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

Magnet fragility

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Thermal limits

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Warning for allergy sufferers

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent direct skin contact or opt for coated magnets.

Data carriers

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Choking Hazard

Strictly store magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are fatal.

Safe operation

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

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

MPL 20x5x5 / N38 - lamellar magnet

Technical details - MPL 20x5x5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - report

Table 1: Static force (force vs distance) - interaction chart MPL 20x5x5 / N38

Table 2: Vertical capacity (vertical surface) MPL 20x5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MPL 20x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MPL 20x5x5 / N38

Table 5: Thermal resistance (stability) - thermal limit MPL 20x5x5 / N38

Table 6: Two magnets (repulsion) - field range MPL 20x5x5 / N38

Table 7: Protective zones (implants) - warnings MPL 20x5x5 / N38

Table 8: Collisions (cracking risk) - warning MPL 20x5x5 / N38

Table 9: Anti-corrosion coating durability MPL 20x5x5 / N38

Table 10: Construction data (Flux) MPL 20x5x5 / N38

Table 11: Physics of underwater searching MPL 20x5x5 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Thermal stability

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

Material specification

Environmental data

Magnet pull force

Magnetic Field

See also offers

MW 2x10 / N38 - cylindrical magnet

AM ucho [M12] - magnetic accessories

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

MPL 50x25x12 / N38 - lamellar magnet

Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Disadvantages

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Practical aspects of lifting capacity – factors

Warnings

Machining danger

Hand protection

Impact on smartphones

Warning for heart patients

Magnet fragility

Thermal limits

Warning for allergy sufferers

Data carriers

Choking Hazard

Safe operation

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - interaction chart
MPL 20x5x5 / N38

Table 2: Vertical capacity (vertical surface)
MPL 20x5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MPL 20x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x5x5 / N38

Table 5: Thermal resistance (stability) - thermal limit
MPL 20x5x5 / N38

Table 6: Two magnets (repulsion) - field range
MPL 20x5x5 / N38

Table 7: Protective zones (implants) - warnings
MPL 20x5x5 / N38

Table 8: Collisions (cracking risk) - warning
MPL 20x5x5 / N38

Table 9: Anti-corrosion coating durability
MPL 20x5x5 / N38

Table 10: Construction data (Flux)
MPL 20x5x5 / N38

Table 11: Physics of underwater searching
MPL 20x5x5 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.