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MPL 20x8x4 / 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
Rating: 5

lamellar magnet

Catalog no 020133

GTIN/EAN: 5906301811398

5.00

length

20 mm [±0,1 mm]

Width

8 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

4.8 g

Magnetization Direction

↑ axial

Load capacity

4.79 kg / 46.98 N

Magnetic Induction

336.99 mT / 3370 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

3.67 ZŁ with VAT / pcs + price for transport

2.98 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Parameters and structure of a neodymium magnet can be verified on our magnetic mass calculator.

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Technical data of the product - MPL 20x8x4 / N38 - lamellar magnet

Specification / characteristics - MPL 20x8x4 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020133
GTIN/EAN	5906301811398
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	8 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	4.8 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.79 kg / 46.98 N
Magnetic Induction ~ ?	336.99 mT / 3370 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x8x4 / 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 analysis of the product - technical parameters

Presented data are the direct effect of a engineering analysis. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may deviate from the simulation results. Please consider these data as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MPL 20x8x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3368 Gs 336.8 mT	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N	strong
1 mm	2818 Gs 281.8 mT	3.35 kg / 7.39 lbs 3352.3 g / 32.9 N	strong
2 mm	2266 Gs 226.6 mT	2.17 kg / 4.78 lbs 2167.6 g / 21.3 N	strong
3 mm	1794 Gs 179.4 mT	1.36 kg / 3.00 lbs 1358.6 g / 13.3 N	safe
5 mm	1130 Gs 113.0 mT	0.54 kg / 1.19 lbs 538.9 g / 5.3 N	safe
10 mm	416 Gs 41.6 mT	0.07 kg / 0.16 lbs 73.0 g / 0.7 N	safe
15 mm	187 Gs 18.7 mT	0.01 kg / 0.03 lbs 14.7 g / 0.1 N	safe
20 mm	97 Gs 9.7 mT	0.00 kg / 0.01 lbs 4.0 g / 0.0 N	safe
30 mm	35 Gs 3.5 mT	0.00 kg / 0.00 lbs 0.5 g / 0.0 N	safe
50 mm	9 Gs 0.9 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	safe

Pulling power weakens sharply with every subsequent millimeter of spacing. Note that even the smallest gap (e.g., contamination, varnish, dust) significantly reduces the pull force. Magnets hold strongest in perfect adhesion; air break weakens the power. See how rapidly the pull force drop, when the product does not touch directly to the metal substrate. When designing the assembly, discard redundant distances.

Table 2: Sliding force (wall)
MPL 20x8x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.96 kg / 2.11 lbs 958.0 g / 9.4 N
1 mm	Stal (~0.2)	0.67 kg / 1.48 lbs 670.0 g / 6.6 N
2 mm	Stal (~0.2)	0.43 kg / 0.96 lbs 434.0 g / 4.3 N
3 mm	Stal (~0.2)	0.27 kg / 0.60 lbs 272.0 g / 2.7 N
5 mm	Stal (~0.2)	0.11 kg / 0.24 lbs 108.0 g / 1.1 N
10 mm	Stal (~0.2)	0.01 kg / 0.03 lbs 14.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 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

The table below calculates the estimated shear load needed to start the slippage of the magnet downwards along a upright steel wall (considering standard friction coefficient). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 20x8x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.44 kg / 3.17 lbs 1437.0 g / 14.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.96 kg / 2.11 lbs 958.0 g / 9.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.48 kg / 1.06 lbs 479.0 g / 4.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.40 kg / 5.28 lbs 2395.0 g / 23.5 N

When mounting a magnet on a upright plane (e.g., a car body), it you can count on only approx. 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient cause that holders move down faster than they pop off the substrate. Designing a wall mount? Remember that the sliding force is noticeably lower than the maximum static pull force. On a painted metal, the element will slide down under a much lighter weight. Using a rubber coating can drastically raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 20x8x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.48 kg / 1.06 lbs 479.0 g / 4.7 N
1 mm	25%	1.20 kg / 2.64 lbs 1197.5 g / 11.7 N
2 mm	50%	2.40 kg / 5.28 lbs 2395.0 g / 23.5 N
3 mm	75%	3.59 kg / 7.92 lbs 3592.5 g / 35.2 N
5 mm	100%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N
10 mm	100%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N
11 mm	100%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N
12 mm	100%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N

A too thin steel is not enough to absorb the full magnetic flux, which weakens actual performance of the holder. Should you mount a strong magnet to a weak sheet, the field will pass right through and the holding will be smaller. To utilize the maximum of this neodymium's power, you require a sufficiently solid element of steel. The saturation effect causes that on sheet metal structures (e.g., appliance housings), the magnet shows lower pull force. We suggest choosing the steel thickness from these parameters.

Table 5: Working in heat (stability) - thermal limit
MPL 20x8x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.79 kg / 10.56 lbs 4790.0 g / 47.0 N	OK
40 °C	-2.2%	4.68 kg / 10.33 lbs 4684.6 g / 46.0 N	OK
60 °C	-4.4%	4.58 kg / 10.10 lbs 4579.2 g / 44.9 N
80 °C	-6.6%	4.47 kg / 9.86 lbs 4473.9 g / 43.9 N
100 °C	-28.8%	3.41 kg / 7.52 lbs 3410.5 g / 33.5 N

Classic neodymiums irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – heat can irreversibly destroy this product. As the temperature rises, the neodymium's power momentarily decreases. Avoid using this product close to heaters higher than its safe range. Ignoring the limit will cause permanent loss of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) may lose charge permanently under lower heat stress compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 20x8x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	11.19 kg / 24.67 lbs 4 784 Gs	1.68 kg / 3.70 lbs 1678 g / 16.5 N	N/A
1 mm	9.49 kg / 20.93 lbs 6 205 Gs	1.42 kg / 3.14 lbs 1424 g / 14.0 N	8.54 kg / 18.84 lbs ~0 Gs
2 mm	7.83 kg / 17.26 lbs 5 635 Gs	1.17 kg / 2.59 lbs 1175 g / 11.5 N	7.05 kg / 15.54 lbs ~0 Gs
3 mm	6.34 kg / 13.97 lbs 5 069 Gs	0.95 kg / 2.10 lbs 951 g / 9.3 N	5.70 kg / 12.57 lbs ~0 Gs
5 mm	4.02 kg / 8.85 lbs 4 035 Gs	0.60 kg / 1.33 lbs 602 g / 5.9 N	3.61 kg / 7.97 lbs ~0 Gs
10 mm	1.26 kg / 2.78 lbs 2 259 Gs	0.19 kg / 0.42 lbs 189 g / 1.9 N	1.13 kg / 2.50 lbs ~0 Gs
20 mm	0.17 kg / 0.38 lbs 832 Gs	0.03 kg / 0.06 lbs 26 g / 0.3 N	0.15 kg / 0.34 lbs ~0 Gs
50 mm	0.00 kg / 0.01 lbs 112 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 70 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 46 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 32 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 23 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 17 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets attract each other from a wider radius than a magnet and sheet setup. The connection of magnet-to-magnet generates a stronger field and a larger range of performance. Planning to create a strong closure? Apply two magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the impact force is massive. The repulsion force is marginally weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Attention: Figures show sliding force of two identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - warnings
MPL 20x8x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.0 cm
Timepiece	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)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a large risk to electronic devices and medical implants. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation passes through tissues and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 20x8x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	32.16 km/h (8.93 m/s)	0.19 J
30 mm	55.18 km/h (15.33 m/s)	0.56 J
50 mm	71.24 km/h (19.79 m/s)	0.94 J
100 mm	100.75 km/h (27.99 m/s)	1.88 J

NdFeB products are delicate – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Striking energy can cause material chips or injury to skin. Be sure to control the product during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when playing with large magnets.

Table 9: Surface protection spec
MPL 20x8x4 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

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

Table 10: Electrical data (Flux)
MPL 20x8x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 277 Mx	52.8 µWb
P_c Coefficient	0.38	Low (Flat)

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

Table 11: Underwater work (magnet fishing)
MPL 20x8x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.79 kg	Standard
Water (riverbed)	5.48 kg (+0.69 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. Buoyancy helps in lifting finds.

1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.38

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

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: 020133-2026

Measurement Calculator

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Kilograms (kg)

Force (N)

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MPL 100x40x20 / N38 - lamellar magnet

335.30 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 30x15x10 / N38 - lamellar magnet

24.48 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 35x35x10 / N38 - lamellar magnet

35.10 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 30x20x10 / N38 - lamellar magnet

16.11 ZŁ brutto / pcs

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 20x8x4 mm and a weight of 4.8 g, guarantees the highest quality connection. This magnetic block with a force of 46.98 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, 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 20x8x4 / 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

They constitute a key element in the production of generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

For mounting flat magnets MPL 20x8x4 / N38, it is best to use strong epoxy glues (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 20x8x4 / N38 model is magnetized through the thickness (dimension 4 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 (20x8 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 20x8x4 mm, which, at a weight of 4.8 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 20x8x4 mm and a self-weight of 4.8 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros and cons of Nd₂Fe₁₄B magnets.

Advantages

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

They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
In other words, due to the metallic layer of silver, the element becomes visually attractive,
The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
Possibility of accurate creating and modifying to concrete applications,
Significant place in advanced technology sectors – they are used in computer drives, drive modules, medical devices, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in small systems

Cons

What to avoid - cons of neodymium magnets and proposals for their use:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
Due to limitations in realizing threads and complex shapes in magnets, we propose using a housing - magnetic mechanism.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

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

The lifting capacity listed is a theoretical maximum value performed under standard conditions:

on a block made of mild steel, optimally conducting the magnetic flux
possessing a thickness of at least 10 mm to ensure full flux closure
characterized by smoothness
without the slightest insulating layer between the magnet and steel
for force applied at a right angle (pull-off, not shear)
in stable room temperature

Magnet lifting force in use – key factors

Holding efficiency impacted by working environment parameters, including (from priority):

Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
Force direction – note that the magnet holds strongest 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. Thin sheet limits the attraction force (the magnet "punches through" it).
Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Safety rules for work with neodymium magnets

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness appears, cease handling magnets and wear gloves.

Immense force

Handle magnets consciously. Their huge power can surprise even professionals. Plan your moves and respect their power.

Phone sensors

Be aware: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.

Magnetic media

Powerful magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

This is not a toy

Strictly keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are fatal.

Fire risk

Powder created during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

ICD Warning

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

Power loss in heat

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

Finger safety

Large magnets can break fingers instantly. Do not place your hand betwixt two attracting surfaces.

Magnet fragility

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

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

MPL 20x8x4 / N38 - lamellar magnet

Technical data of the product - MPL 20x8x4 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - technical parameters

Table 1: Static pull force (pull vs gap) - power drop MPL 20x8x4 / N38

Table 2: Sliding force (wall) MPL 20x8x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MPL 20x8x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MPL 20x8x4 / N38

Table 5: Working in heat (stability) - thermal limit MPL 20x8x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MPL 20x8x4 / N38

Table 7: Safety (HSE) (implants) - warnings MPL 20x8x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 20x8x4 / N38

Table 9: Surface protection spec MPL 20x8x4 / N38

Table 10: Electrical data (Flux) MPL 20x8x4 / N38

Table 11: Underwater work (magnet fishing) MPL 20x8x4 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Temperature resistance

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

Material specification

Environmental data

Pulling force

Field Strength

See also offers

MPL 100x40x20 / N38 - lamellar magnet

MPL 30x15x10 / N38 - lamellar magnet

MPL 35x35x10 / N38 - lamellar magnet

MPL 30x20x10 / N38 - lamellar magnet

Pros and cons of Nd2Fe14B magnets.

Advantages

Cons

Pull force analysis

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

Magnet lifting force in use – key factors

Safety rules for work with neodymium magnets

Nickel allergy

Immense force

Phone sensors

Magnetic media

This is not a toy

Fire risk

ICD Warning

Power loss in heat

Finger safety

Magnet fragility

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MPL 20x8x4 / N38

Table 2: Sliding force (wall)
MPL 20x8x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 20x8x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 20x8x4 / N38

Table 5: Working in heat (stability) - thermal limit
MPL 20x8x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 20x8x4 / N38

Table 7: Safety (HSE) (implants) - warnings
MPL 20x8x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 20x8x4 / N38

Table 9: Surface protection spec
MPL 20x8x4 / N38

Table 10: Electrical data (Flux)
MPL 20x8x4 / N38

Table 11: Underwater work (magnet fishing)
MPL 20x8x4 / N38

Pros and cons of Nd₂Fe₁₄B magnets.