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MPL 40x5x3 / 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 020402

GTIN/EAN: 5906301811916

length

40 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

4.5 g

Magnetization Direction

↑ axial

Load capacity

7.33 kg / 71.91 N

Magnetic Induction

348.83 mT / 3488 Gs

Coating

[NiCuNi] Nickel

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Want to talk magnets?

Pick up the phone and ask +48 888 99 98 98 otherwise get in touch using our online form our website.
Parameters and form of neodymium magnets can be checked on our force calculator.

Orders placed before 14:00 will be shipped the same business day.

Physical properties - MPL 40x5x3 / N38 - lamellar magnet

Specification / characteristics - MPL 40x5x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020402
GTIN/EAN	5906301811916
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	5 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	4.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.33 kg / 71.91 N
Magnetic Induction ~ ?	348.83 mT / 3488 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x5x3 / 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 assembly - technical parameters

These data constitute the direct effect of a mathematical analysis. Results were calculated on models for the class Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Treat these data as a supplementary guide when designing systems.

Table 1: Static force (force vs distance) - power drop
MPL 40x5x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3485 Gs 348.5 mT	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N	medium risk
1 mm	2529 Gs 252.9 mT	3.86 kg / 8.51 pounds 3859.9 g / 37.9 N	medium risk
2 mm	1741 Gs 174.1 mT	1.83 kg / 4.03 pounds 1829.7 g / 17.9 N	safe
3 mm	1217 Gs 121.7 mT	0.89 kg / 1.97 pounds 893.7 g / 8.8 N	safe
5 mm	664 Gs 66.4 mT	0.27 kg / 0.59 pounds 265.9 g / 2.6 N	safe
10 mm	235 Gs 23.5 mT	0.03 kg / 0.07 pounds 33.5 g / 0.3 N	safe
15 mm	116 Gs 11.6 mT	0.01 kg / 0.02 pounds 8.2 g / 0.1 N	safe
20 mm	67 Gs 6.7 mT	0.00 kg / 0.01 pounds 2.7 g / 0.0 N	safe
30 mm	27 Gs 2.7 mT	0.00 kg / 0.00 pounds 0.5 g / 0.0 N	safe
50 mm	8 Gs 0.8 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Magnetic force weakens sharply with every subsequent millimeter of gap. Note that even the smallest gap (e.g., dirt, paint, dust) noticeably diminishes the holding power. Magnets work most effectively in perfect adhesion; distance weakens the power. Analyze how flashily the parameters plummet, when the magnet does not adhere tightly to the steel surface. When calculating the assembly, avoid unnecessary gaps.

Table 2: Sliding hold (vertical surface)
MPL 40x5x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.47 kg / 3.23 pounds 1466.0 g / 14.4 N
1 mm	Stal (~0.2)	0.77 kg / 1.70 pounds 772.0 g / 7.6 N
2 mm	Stal (~0.2)	0.37 kg / 0.81 pounds 366.0 g / 3.6 N
3 mm	Stal (~0.2)	0.18 kg / 0.39 pounds 178.0 g / 1.7 N
5 mm	Stal (~0.2)	0.05 kg / 0.12 pounds 54.0 g / 0.5 N
10 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data shows the estimated holding capacity necessary to cause the sliding of the magnet down against a vertical steel plate (considering typical friction). The holding force varies with the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MPL 40x5x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.20 kg / 4.85 pounds 2199.0 g / 21.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.47 kg / 3.23 pounds 1466.0 g / 14.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.73 kg / 1.62 pounds 733.0 g / 7.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.67 kg / 8.08 pounds 3665.0 g / 36.0 N

When mounting a holder on a vertical surface (e.g., a car body), it you can count on only approx. 20%-30% of its nominal power. Gravity and a weak degree of grip cause that products slide down faster than they pop off the substrate. Planning a vertical fastening? Consider that the shear force is much weaker than the maximum static pull force. On a slippery surface, the element will slip down under a significantly smaller load. Application of an anti-slip coating can effectively improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x5x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.73 kg / 1.62 pounds 733.0 g / 7.2 N
1 mm	25%	1.83 kg / 4.04 pounds 1832.5 g / 18.0 N
2 mm	50%	3.67 kg / 8.08 pounds 3665.0 g / 36.0 N
3 mm	75%	5.50 kg / 12.12 pounds 5497.5 g / 53.9 N
5 mm	100%	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N
10 mm	100%	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N
11 mm	100%	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N
12 mm	100%	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N

A too thin steel is unable to conduct the full magnetic flux, which squanders power of the holder. If you mount a strong magnet to a thin surface, the field will penetrate right through and the attraction force will be weaker. To squeeze 100% of this magnet's potential, you require a sufficiently solid piece of metal. The saturation effect means that on delicate walls (e.g., car bodies), the magnet shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - resistance threshold
MPL 40x5x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.33 kg / 16.16 pounds 7330.0 g / 71.9 N	OK
40 °C	-2.2%	7.17 kg / 15.80 pounds 7168.7 g / 70.3 N	OK
60 °C	-4.4%	7.01 kg / 15.45 pounds 7007.5 g / 68.7 N
80 °C	-6.6%	6.85 kg / 15.09 pounds 6846.2 g / 67.2 N
100 °C	-28.8%	5.22 kg / 11.51 pounds 5219.0 g / 51.2 N

Standard neodymium magnets change their properties parameters past the thermal threshold. Protect against heat – high temperature can permanently demagnetize this magnet. With increasing heat, the neodymium's capacity temporarily drops. Refrain from using this magnet close to ovens exceeding its working range. Ignoring the limit will result in irreversible degradation of magnetism.

*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) are more susceptible to demagnetization at lower temperatures than taller cylinders. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 40x5x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	14.97 kg / 33.01 pounds 4 697 Gs	2.25 kg / 4.95 pounds 2246 g / 22.0 N	N/A
1 mm	11.16 kg / 24.61 pounds 6 017 Gs	1.67 kg / 3.69 pounds 1674 g / 16.4 N	10.04 kg / 22.15 pounds ~0 Gs
2 mm	7.88 kg / 17.38 pounds 5 058 Gs	1.18 kg / 2.61 pounds 1183 g / 11.6 N	7.10 kg / 15.64 pounds ~0 Gs
3 mm	5.44 kg / 11.99 pounds 4 201 Gs	0.82 kg / 1.80 pounds 816 g / 8.0 N	4.90 kg / 10.79 pounds ~0 Gs
5 mm	2.59 kg / 5.71 pounds 2 899 Gs	0.39 kg / 0.86 pounds 389 g / 3.8 N	2.33 kg / 5.14 pounds ~0 Gs
10 mm	0.54 kg / 1.20 pounds 1 328 Gs	0.08 kg / 0.18 pounds 81 g / 0.8 N	0.49 kg / 1.08 pounds ~0 Gs
20 mm	0.07 kg / 0.15 pounds 471 Gs	0.01 kg / 0.02 pounds 10 g / 0.1 N	0.06 kg / 0.14 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 83 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 55 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 38 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 27 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 20 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 15 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets attract each other from a wider radius than a magnet and sheet setup. The connection of two magnets creates a more powerful interaction and a larger range of action. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the impact force is huge. The repulsion force is slightly lower than the attraction, but still large.
*The magnetic induction for N-N configuration drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Important: Calculations demonstrate sliding force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - warnings
MPL 40x5x3 / 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
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Car key	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 poses a serious hazard to IT equipment as well as pacemakers. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field acts through matter and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x5x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	40.82 km/h (11.34 m/s)	0.29 J
30 mm	70.50 km/h (19.58 m/s)	0.86 J
50 mm	91.02 km/h (25.28 m/s)	1.44 J
100 mm	128.71 km/h (35.75 m/s)	2.88 J

NdFeB products are delicate – a violent impact against metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Impact energy can cause material chips or injury to skin. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Surface protection spec
MPL 40x5x3 / N38

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

The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MPL 40x5x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 123 Mx	51.2 µWb
P_c Coefficient	0.27	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter in coil applications as well as sensors. P_c value determines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 40x5x3 / N38

Environment	Effective steel pull	Effect
Air (land)	7.33 kg	Standard
Water (riverbed)	8.39 kg (+1.06 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.27

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 and environmental data

Chemical composition

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

Sustainability

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 020402-2026

Measurement Calculator

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Pounds (lbs)

Magnetic Induction

Gauss (Gs)

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Model MPL 40x5x3 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 71.91 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 block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 40x5x3 / 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.

Plate magnets MPL 40x5x3 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners 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 roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

Standardly, the MPL 40x5x3 / N38 model is magnetized through the thickness (dimension 3 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (40x5 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.

This model is characterized by dimensions 40x5x3 mm, which, at a weight of 4.5 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 40x5x3 mm and a self-weight of 4.5 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of rare earth magnets.

Pros

Apart from their consistent holding force, neodymium magnets have these key benefits:

They have stable power, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by magnetic disturbances,
Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold, or silver gives an professional appearance,
Magnetic induction on the top side of the magnet remains strong,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Thanks to freedom in forming and the capacity to adapt to client solutions,
Universal use in future technologies – they serve a role in hard drives, drive modules, advanced medical instruments, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in small systems

Cons

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 extremely resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these devices are able to complicate diagnosis medical when they are in the body.
With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

The lifting capacity listed is a measurement result executed under specific, ideal conditions:

on a base made of mild steel, effectively closing the magnetic flux
whose transverse dimension reaches at least 10 mm
with an polished contact surface
without any insulating layer between the magnet and steel
for force applied at a right angle (in the magnet axis)
at ambient temperature room level

Lifting capacity in real conditions – factors

Real force impacted by specific conditions, such as (from priority):

Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
Plate material – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Warnings

Demagnetization risk

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

Life threat

People with a pacemaker should maintain an absolute distance from magnets. The magnetism can disrupt the functioning of the life-saving device.

Eye protection

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

Bodily injuries

Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying anything in their path. Be careful!

Impact on smartphones

A strong magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.

Magnetic media

Do not bring magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.

Nickel coating and allergies

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and use protective gear.

Adults only

Neodymium magnets are not toys. Eating a few magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Handling rules

Exercise caution. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can move away.

Fire risk

Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Warning! Need more info? Read our article: Are neodymium magnets dangerous?

MPL 40x5x3 / N38 - lamellar magnet

Physical properties - MPL 40x5x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - technical parameters

Table 1: Static force (force vs distance) - power drop MPL 40x5x3 / N38

Table 2: Sliding hold (vertical surface) MPL 40x5x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull MPL 40x5x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MPL 40x5x3 / N38

Table 5: Thermal stability (stability) - resistance threshold MPL 40x5x3 / N38

Table 6: Two magnets (attraction) - forces in the system MPL 40x5x3 / N38

Table 7: Safety (HSE) (implants) - warnings MPL 40x5x3 / N38

Table 8: Impact energy (kinetic energy) - collision effects MPL 40x5x3 / N38

Table 9: Surface protection spec MPL 40x5x3 / N38

Table 10: Electrical data (Flux) MPL 40x5x3 / N38

Table 11: Physics of underwater searching MPL 40x5x3 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Temperature resistance

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Induction

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Strengths and weaknesses of rare earth magnets.

Pros

Cons

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

Lifting capacity in real conditions – factors

Warnings

Demagnetization risk

Life threat

Eye protection

Bodily injuries

Impact on smartphones

Magnetic media

Nickel coating and allergies

Adults only

Handling rules

Fire risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MPL 40x5x3 / N38

Table 2: Sliding hold (vertical surface)
MPL 40x5x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MPL 40x5x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x5x3 / N38

Table 5: Thermal stability (stability) - resistance threshold
MPL 40x5x3 / N38

Table 6: Two magnets (attraction) - forces in the system
MPL 40x5x3 / N38

Table 7: Safety (HSE) (implants) - warnings
MPL 40x5x3 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x5x3 / N38

Table 9: Surface protection spec
MPL 40x5x3 / N38

Table 10: Electrical data (Flux)
MPL 40x5x3 / N38

Table 11: Physics of underwater searching
MPL 40x5x3 / N38