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MPL 42x20x5 / 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 020163

GTIN/EAN: 5906301811695

5.00

length

42 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

31.5 g

Magnetization Direction

↑ axial

Load capacity

11.06 kg / 108.46 N

Magnetic Induction

203.37 mT / 2034 Gs

Coating

[NiCuNi] Nickel

check properties »

15.62 ZŁ with VAT / pcs + price for transport

12.70 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 42x20x5 / N38 - lamellar magnet

Specification / characteristics - MPL 42x20x5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020163
GTIN/EAN	5906301811695
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	42 mm [±0,1 mm]
Width	20 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	31.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	11.06 kg / 108.46 N
Magnetic Induction ~ ?	203.37 mT / 2034 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 42x20x5 / 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

Engineering modeling of the product - data

Presented information are the outcome of a physical simulation. Values are based on algorithms for the class Nd₂Fe₁₄B. Actual parameters might slightly differ. Use these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - power drop
MPL 42x20x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2033 Gs 203.3 mT	11.06 kg / 24.38 LBS 11060.0 g / 108.5 N	dangerous!
1 mm	1938 Gs 193.8 mT	10.05 kg / 22.15 LBS 10049.3 g / 98.6 N	dangerous!
2 mm	1823 Gs 182.3 mT	8.89 kg / 19.60 LBS 8888.2 g / 87.2 N	strong
3 mm	1696 Gs 169.6 mT	7.69 kg / 16.96 LBS 7691.7 g / 75.5 N	strong
5 mm	1433 Gs 143.3 mT	5.49 kg / 12.10 LBS 5490.3 g / 53.9 N	strong
10 mm	885 Gs 88.5 mT	2.09 kg / 4.62 LBS 2093.5 g / 20.5 N	strong
15 mm	547 Gs 54.7 mT	0.80 kg / 1.76 LBS 799.6 g / 7.8 N	safe
20 mm	350 Gs 35.0 mT	0.33 kg / 0.72 LBS 327.0 g / 3.2 N	safe
30 mm	160 Gs 16.0 mT	0.07 kg / 0.15 LBS 68.5 g / 0.7 N	safe
50 mm	48 Gs 4.8 mT	0.01 kg / 0.01 LBS 6.2 g / 0.1 N	safe

Grip strength weakens significantly per each millimeter of spacing. Remember that even the smallest gap (e.g., dirt, paint, veneer) significantly weakens the grip. Neodymiums work most effectively in perfect adhesion; distance kills the power. Observe how flashily the parameters fall, when the product does not adhere flatly to the steel surface. When designing the assembly, discard additional spacers.

Table 2: Sliding hold (vertical surface)
MPL 42x20x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.21 kg / 4.88 LBS 2212.0 g / 21.7 N
1 mm	Stal (~0.2)	2.01 kg / 4.43 LBS 2010.0 g / 19.7 N
2 mm	Stal (~0.2)	1.78 kg / 3.92 LBS 1778.0 g / 17.4 N
3 mm	Stal (~0.2)	1.54 kg / 3.39 LBS 1538.0 g / 15.1 N
5 mm	Stal (~0.2)	1.10 kg / 2.42 LBS 1098.0 g / 10.8 N
10 mm	Stal (~0.2)	0.42 kg / 0.92 LBS 418.0 g / 4.1 N
15 mm	Stal (~0.2)	0.16 kg / 0.35 LBS 160.0 g / 1.6 N
20 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 66.0 g / 0.6 N
30 mm	Stal (~0.2)	0.01 kg / 0.03 LBS 14.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N

The following data defines the estimated weight limit necessary to initiate the sliding of the magnet down against a vertical steel plate (considering standard friction coefficient). This parameter depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 42x20x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.32 kg / 7.31 LBS 3318.0 g / 32.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.21 kg / 4.88 LBS 2212.0 g / 21.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.11 kg / 2.44 LBS 1106.0 g / 10.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	5.53 kg / 12.19 LBS 5530.0 g / 54.2 N

When hanging a holder on a upright plane (e.g., a fridge), it will maintain barely approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip influence the fact that holders move down easier than they detach. Planning a hanger? Note that the sliding force is noticeably lower than the maximum static pull force. On a slippery surface, the element will give way down under a significantly smaller weight. Using a rubber pad can effectively increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 42x20x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.55 kg / 1.22 LBS 553.0 g / 5.4 N
1 mm	13%	1.38 kg / 3.05 LBS 1382.5 g / 13.6 N
2 mm	25%	2.77 kg / 6.10 LBS 2765.0 g / 27.1 N
3 mm	38%	4.15 kg / 9.14 LBS 4147.5 g / 40.7 N
5 mm	63%	6.91 kg / 15.24 LBS 6912.5 g / 67.8 N
10 mm	100%	11.06 kg / 24.38 LBS 11060.0 g / 108.5 N
11 mm	100%	11.06 kg / 24.38 LBS 11060.0 g / 108.5 N
12 mm	100%	11.06 kg / 24.38 LBS 11060.0 g / 108.5 N

A too thin steel is unable to take in the full magnetic flux, which wastes potential of the holder. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the attraction force will be weaker. To achieve the maximum of this neodymium's potential, you require a sufficiently solid backing of steel. The saturation effect means that on sheet metal structures (e.g., thin profiles), the holder works worse. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 42x20x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	11.06 kg / 24.38 LBS 11060.0 g / 108.5 N	OK
40 °C	-2.2%	10.82 kg / 23.85 LBS 10816.7 g / 106.1 N	OK
60 °C	-4.4%	10.57 kg / 23.31 LBS 10573.4 g / 103.7 N
80 °C	-6.6%	10.33 kg / 22.77 LBS 10330.0 g / 101.3 N
100 °C	-28.8%	7.87 kg / 17.36 LBS 7874.7 g / 77.3 N

Classic neodymiums lose parameters after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. As the temperature rises, the magnet's capacity briefly lowers. Refrain from using this magnet close to ovens higher than its safe range. Too high temperature will lead to destruction of magnetism.

*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) are more susceptible to demagnetization sooner than long magnets. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MPL 42x20x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	21.41 kg / 47.21 LBS 3 465 Gs	3.21 kg / 7.08 LBS 3212 g / 31.5 N	N/A
1 mm	20.49 kg / 45.17 LBS 3 978 Gs	3.07 kg / 6.78 LBS 3074 g / 30.2 N	18.44 kg / 40.66 LBS ~0 Gs
2 mm	19.46 kg / 42.89 LBS 3 877 Gs	2.92 kg / 6.43 LBS 2918 g / 28.6 N	17.51 kg / 38.60 LBS ~0 Gs
3 mm	18.35 kg / 40.46 LBS 3 765 Gs	2.75 kg / 6.07 LBS 2753 g / 27.0 N	16.52 kg / 36.41 LBS ~0 Gs
5 mm	16.05 kg / 35.38 LBS 3 521 Gs	2.41 kg / 5.31 LBS 2407 g / 23.6 N	14.44 kg / 31.84 LBS ~0 Gs
10 mm	10.63 kg / 23.43 LBS 2 865 Gs	1.59 kg / 3.52 LBS 1594 g / 15.6 N	9.57 kg / 21.09 LBS ~0 Gs
20 mm	4.05 kg / 8.94 LBS 1 769 Gs	0.61 kg / 1.34 LBS 608 g / 6.0 N	3.65 kg / 8.04 LBS ~0 Gs
50 mm	0.28 kg / 0.62 LBS 465 Gs	0.04 kg / 0.09 LBS 42 g / 0.4 N	0.25 kg / 0.55 LBS ~0 Gs
60 mm	0.13 kg / 0.29 LBS 320 Gs	0.02 kg / 0.04 LBS 20 g / 0.2 N	0.12 kg / 0.26 LBS ~0 Gs
70 mm	0.07 kg / 0.15 LBS 228 Gs	0.01 kg / 0.02 LBS 10 g / 0.1 N	0.06 kg / 0.13 LBS ~0 Gs
80 mm	0.04 kg / 0.08 LBS 167 Gs	0.01 kg / 0.01 LBS 5 g / 0.1 N	0.03 kg / 0.07 LBS ~0 Gs
90 mm	0.02 kg / 0.04 LBS 125 Gs	0.00 kg / 0.01 LBS 3 g / 0.0 N	0.02 kg / 0.04 LBS ~0 Gs
100 mm	0.01 kg / 0.03 LBS 96 Gs	0.00 kg / 0.00 LBS 2 g / 0.0 N	0.01 kg / 0.02 LBS ~0 Gs

Two magnetic products interact from a much further distance than a neodymium and metal combination. The setup of magnet-to-magnet generates a stronger field and a wider radius of action. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the impact force is massive. The levitation is a bit weaker than the attraction, but still significant.
*Field value between like poles is approximately ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Important: Estimates apply to friction force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - warnings
MPL 42x20x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	11.5 cm
Hearing aid	10 Gs (1.0 mT)	9.0 cm
Timepiece	20 Gs (2.0 mT)	7.0 cm
Mobile device	40 Gs (4.0 mT)	5.5 cm
Remote	50 Gs (5.0 mT)	5.0 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Powerful magnet radiation is a serious hazard to IT equipment and pacemakers. These neodymiums generate a flux that disrupts operation of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and glass. Special caution must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MPL 42x20x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.01 km/h (5.84 m/s)	0.54 J
30 mm	32.86 km/h (9.13 m/s)	1.31 J
50 mm	42.27 km/h (11.74 m/s)	2.17 J
100 mm	59.76 km/h (16.60 m/s)	4.34 J

Neodymium magnets are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Always hold the magnet during installation so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Coating parameters (durability)
MPL 42x20x5 / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MPL 42x20x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	18 614 Mx	186.1 µWb
P_c Coefficient	0.23	Low (Flat)

Flux value passing through the pole surface. Key data in coil applications and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 42x20x5 / N38

Environment	Effective steel pull	Effect
Air (land)	11.06 kg	Standard
Water (riverbed)	12.66 kg (+1.60 kg buoyancy gain)	+14.5%

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

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Caution: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Steel thickness impact

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

3. Thermal stability

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.23

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.

Engineering data and GPSR

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%

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: 020163-2026

Magnet Unit Converter

Force (pull)

Force in kg

lbs

Magnetic Field

Gauss (Gs)

Just complete any input, and the tool compute the rest instantly.

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Model MPL 42x20x5 / N38 features a low profile and professional pulling force, making it an ideal solution for building separators and machines. As a block magnet with high power (approx. 11.06 kg), this product is available off-the-shelf from our warehouse in Poland. 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 42x20x5 / 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.

Plate magnets MPL 42x20x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts under tiles, wood, or glass. Customers often choose this model for workshop organization 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 42x20x5 / 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 (42x20 mm), which is ideal for flat mounting. 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: 42 mm (length), 20 mm (width), and 5 mm (thickness). The key parameter here is the holding force amounting to approximately 11.06 kg (force ~108.46 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Pros and cons of Nd₂Fe₁₄B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose magnetism, even after nearly 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
They show high resistance to demagnetization induced by external magnetic fields,
A magnet with a metallic gold surface has an effective appearance,
Neodymium magnets achieve maximum magnetic induction on a contact point, which increases force concentration,
Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
Due to the ability of accurate shaping and customization to unique projects, magnetic components can be created in a variety of geometric configurations, which expands the range of possible applications,
Versatile presence in electronics industry – they are commonly used in magnetic memories, electromotive mechanisms, precision medical tools, also multitasking production systems.
Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets demagnetize 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 very resistant to heat
They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can be problematic in diagnostics 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

Detachment force of the magnet in optimal conditions – what affects it?

Magnet power was determined for the most favorable conditions, taking into account:

on a block made of mild steel, optimally conducting the magnetic field
whose transverse dimension equals approx. 10 mm
characterized by lack of roughness
under conditions of gap-free contact (surface-to-surface)
during detachment in a direction perpendicular to the mounting surface
in temp. approx. 20°C

Lifting capacity in real conditions – factors

During everyday use, the real power results from a number of factors, listed from the most important:

Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Direction of force – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the holding force.

Warnings

Protect data

Do not bring magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Skin irritation risks

It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact or select versions in plastic housing.

Warning for heart patients

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Caution required

Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Physical harm

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Do not overheat magnets

Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Dust is flammable

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Shattering risk

Watch out for shards. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Swallowing risk

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Store away from children and animals.

GPS Danger

GPS units and smartphones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Important! Learn more about risks in the article: Safety of working with magnets.

MPL 42x20x5 / N38 - lamellar magnet

Physical properties - MPL 42x20x5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the product - data

Table 1: Static pull force (force vs gap) - power drop MPL 42x20x5 / N38

Table 2: Sliding hold (vertical surface) MPL 42x20x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 42x20x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MPL 42x20x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MPL 42x20x5 / N38

Table 6: Two magnets (repulsion) - forces in the system MPL 42x20x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MPL 42x20x5 / N38

Table 8: Collisions (cracking risk) - warning MPL 42x20x5 / N38

Table 9: Coating parameters (durability) MPL 42x20x5 / N38

Table 10: Electrical data (Flux) MPL 42x20x5 / N38

Table 11: Underwater work (magnet fishing) MPL 42x20x5 / N38

1. Shear force

2. Steel thickness impact

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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Pros and cons of Nd2Fe14B magnets.

Pros

Weaknesses

Pull force analysis

Detachment force of the magnet in optimal conditions – what affects it?

Lifting capacity in real conditions – factors

Warnings

Protect data

Skin irritation risks

Warning for heart patients

Caution required

Physical harm

Do not overheat magnets

Dust is flammable

Shattering risk

Swallowing risk

GPS Danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - power drop
MPL 42x20x5 / N38

Table 2: Sliding hold (vertical surface)
MPL 42x20x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 42x20x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 42x20x5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 42x20x5 / N38

Table 6: Two magnets (repulsion) - forces in the system
MPL 42x20x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MPL 42x20x5 / N38

Table 8: Collisions (cracking risk) - warning
MPL 42x20x5 / N38

Table 9: Coating parameters (durability)
MPL 42x20x5 / N38

Table 10: Electrical data (Flux)
MPL 42x20x5 / N38

Table 11: Underwater work (magnet fishing)
MPL 42x20x5 / N38

Pros and cons of Nd₂Fe₁₄B magnets.