MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Product on order Ships in 3-5 days

MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

lamellar magnet

Catalog no 020159

GTIN/EAN: 5906301811657

5.00

length

40 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

24 g

Magnetization Direction

↑ axial

Load capacity

7.52 kg / 73.80 N

Magnetic Induction

168.28 mT / 1683 Gs

Coating

[NiCuNi] Nickel

technical details »

17.96 ZŁ with VAT / pcs + price for transport

14.60 ZŁ net + 23% VAT / pcs

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Technical of the product - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Specification / characteristics - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

properties

properties	values
Cat. no.	020159
GTIN/EAN	5906301811657
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	20 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	24 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.52 kg / 73.80 N
Magnetic Induction ~ ?	168.28 mT / 1683 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Engineering simulation of the magnet - data

Presented values constitute the outcome of a physical analysis. Results were calculated on models for the class Nd₂Fe₁₄B. Real-world conditions might slightly differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - characteristics
MPL 40x20x4x2[7/3.5] / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1683 Gs 168.3 mT	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N	warning
1 mm	1613 Gs 161.3 mT	6.91 kg / 15.24 pounds 6913.8 g / 67.8 N	warning
2 mm	1524 Gs 152.4 mT	6.17 kg / 13.61 pounds 6172.9 g / 60.6 N	warning
3 mm	1423 Gs 142.3 mT	5.38 kg / 11.86 pounds 5379.4 g / 52.8 N	warning
5 mm	1207 Gs 120.7 mT	3.87 kg / 8.53 pounds 3869.8 g / 38.0 N	warning
10 mm	744 Gs 74.4 mT	1.47 kg / 3.24 pounds 1469.3 g / 14.4 N	safe
15 mm	455 Gs 45.5 mT	0.55 kg / 1.21 pounds 550.7 g / 5.4 N	safe
20 mm	288 Gs 28.8 mT	0.22 kg / 0.49 pounds 220.3 g / 2.2 N	safe
30 mm	129 Gs 12.9 mT	0.04 kg / 0.10 pounds 44.4 g / 0.4 N	safe
50 mm	38 Gs 3.8 mT	0.00 kg / 0.01 pounds 3.8 g / 0.0 N	safe

Magnetic force drops significantly with every mm of spacing. Keep in mind that even a very thin break (e.g., dirt, varnish, rust) significantly reduces the pull force. Magnets hold strongest during direct contact; gap weakens the power. Observe how quickly the load capacity plummet, when the product does not adhere flatly to the steel surface. When planning the assembly, eliminate redundant distances.

Table 2: Vertical force (vertical surface)
MPL 40x20x4x2[7/3.5] / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.50 kg / 3.32 pounds 1504.0 g / 14.8 N
1 mm	Stal (~0.2)	1.38 kg / 3.05 pounds 1382.0 g / 13.6 N
2 mm	Stal (~0.2)	1.23 kg / 2.72 pounds 1234.0 g / 12.1 N
3 mm	Stal (~0.2)	1.08 kg / 2.37 pounds 1076.0 g / 10.6 N
5 mm	Stal (~0.2)	0.77 kg / 1.71 pounds 774.0 g / 7.6 N
10 mm	Stal (~0.2)	0.29 kg / 0.65 pounds 294.0 g / 2.9 N
15 mm	Stal (~0.2)	0.11 kg / 0.24 pounds 110.0 g / 1.1 N
20 mm	Stal (~0.2)	0.04 kg / 0.10 pounds 44.0 g / 0.4 N
30 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data defines the estimated holding capacity sufficient to start the slippage of the magnet down along a vertical steel wall (considering standard friction coefficient). The holding force varies with the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x20x4x2[7/3.5] / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.26 kg / 4.97 pounds 2256.0 g / 22.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.50 kg / 3.32 pounds 1504.0 g / 14.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.75 kg / 1.66 pounds 752.0 g / 7.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.76 kg / 8.29 pounds 3760.0 g / 36.9 N

When hanging a magnet on a upright surface (e.g., a board), it you can count on barely approx. 20%-30% of its maximum pull force. Gravitational force and a weak degree of grip influence the fact that magnets move down easier than they detach. Want to create a vertical fastening? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will give way down under a noticeably lighter weight. Using a rubber coating can effectively raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x20x4x2[7/3.5] / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.75 kg / 1.66 pounds 752.0 g / 7.4 N
1 mm	25%	1.88 kg / 4.14 pounds 1880.0 g / 18.4 N
2 mm	50%	3.76 kg / 8.29 pounds 3760.0 g / 36.9 N
3 mm	75%	5.64 kg / 12.43 pounds 5640.0 g / 55.3 N
5 mm	100%	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N
10 mm	100%	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N
11 mm	100%	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N
12 mm	100%	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N

A too thin steel is incapable of focus the full magnetic flux, which weakens actual performance of the holder. Should you mount a strong magnet to a thin surface, the flux will penetrate right through and the holding will be smaller. To squeeze the maximum of this neodymium's power, you need a suitably thick backing of steel. The saturation phenomenon means that on delicate walls (e.g., car bodies), the holder holds weaker. We suggest choosing the steel cross-section based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MPL 40x20x4x2[7/3.5] / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.52 kg / 16.58 pounds 7520.0 g / 73.8 N	OK
40 °C	-2.2%	7.35 kg / 16.21 pounds 7354.6 g / 72.1 N	OK
60 °C	-4.4%	7.19 kg / 15.85 pounds 7189.1 g / 70.5 N
80 °C	-6.6%	7.02 kg / 15.48 pounds 7023.7 g / 68.9 N
100 °C	-28.8%	5.35 kg / 11.80 pounds 5354.2 g / 52.5 N

Ordinary NdFeB products change their properties power above the temperature limit. Avoid high temperatures – heat can permanently damage this product. With every degree above norm, 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 irreversible degradation of magnetic properties.

*Technical advisory: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MPL 40x20x4x2[7/3.5] / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.96 kg / 30.78 pounds 2 997 Gs	2.09 kg / 4.62 pounds 2094 g / 20.5 N	N/A
1 mm	13.44 kg / 29.64 pounds 3 302 Gs	2.02 kg / 4.45 pounds 2017 g / 19.8 N	12.10 kg / 26.68 pounds ~0 Gs
2 mm	12.84 kg / 28.30 pounds 3 227 Gs	1.93 kg / 4.25 pounds 1926 g / 18.9 N	11.55 kg / 25.47 pounds ~0 Gs
3 mm	12.17 kg / 26.83 pounds 3 142 Gs	1.83 kg / 4.02 pounds 1826 g / 17.9 N	10.95 kg / 24.15 pounds ~0 Gs
5 mm	10.73 kg / 23.65 pounds 2 950 Gs	1.61 kg / 3.55 pounds 1609 g / 15.8 N	9.66 kg / 21.29 pounds ~0 Gs
10 mm	7.19 kg / 15.84 pounds 2 414 Gs	1.08 kg / 2.38 pounds 1078 g / 10.6 N	6.47 kg / 14.26 pounds ~0 Gs
20 mm	2.73 kg / 6.01 pounds 1 487 Gs	0.41 kg / 0.90 pounds 409 g / 4.0 N	2.46 kg / 5.41 pounds ~0 Gs
50 mm	0.18 kg / 0.39 pounds 379 Gs	0.03 kg / 0.06 pounds 27 g / 0.3 N	0.16 kg / 0.35 pounds ~0 Gs
60 mm	0.08 kg / 0.18 pounds 259 Gs	0.01 kg / 0.03 pounds 12 g / 0.1 N	0.07 kg / 0.16 pounds ~0 Gs
70 mm	0.04 kg / 0.09 pounds 183 Gs	0.01 kg / 0.01 pounds 6 g / 0.1 N	0.04 kg / 0.08 pounds ~0 Gs
80 mm	0.02 kg / 0.05 pounds 133 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
90 mm	0.01 kg / 0.03 pounds 99 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
100 mm	0.01 kg / 0.02 pounds 76 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets interact from a wider radius than a neodymium and metal setup. The connection of magnet-to-magnet creates a more powerful interaction and a larger range of operation. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the impact force is massive. The levitation is slightly lower than the connection force, but still impressive.
*Flux density in repulsion mode reaches ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Important: Estimates show shear force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x20x4x2[7/3.5] / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.5 cm
Hearing aid	10 Gs (1.0 mT)	8.5 cm
Mechanical watch	20 Gs (2.0 mT)	6.5 cm
Mobile device	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Powerful magnet radiation poses a large risk to IT equipment as well as pacemakers. These magnets generate a field that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MPL 40x20x4x2[7/3.5] / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.91 km/h (5.53 m/s)	0.37 J
30 mm	31.03 km/h (8.62 m/s)	0.89 J
50 mm	39.93 km/h (11.09 m/s)	1.48 J
100 mm	56.45 km/h (15.68 m/s)	2.95 J

Neodymium magnets are prone to chipping – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Surface protection spec
MPL 40x20x4x2[7/3.5] / N38

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

The 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 40x20x4x2[7/3.5] / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	15 299 Mx	153.0 µWb
P_c Coefficient	0.19	Low (Flat)

Total magnetic flux emitted by the pole surface. Essential parameter in coil applications and motors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
MPL 40x20x4x2[7/3.5] / N38

Environment	Effective steel pull	Effect
Air (land)	7.52 kg	Standard
Water (riverbed)	8.61 kg (+1.09 kg buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

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

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) severely limits the holding force.

3. Power loss vs temp

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.19

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 and environmental data

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: 020159-2026

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x20x4 mm and a weight of 24 g, guarantees the highest quality connection. As a block magnet with high power (approx. 7.52 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

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 7.52 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 40x20x4x2[7/3.5] / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as invisible mounts under tiles, wood, or glass. Customers often choose this model for hanging tools 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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 40x20x4x2[7/3.5] / N38 model is magnetized axially (dimension 4 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

This model is characterized by dimensions 40x20x4 mm, which, at a weight of 24 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 7.52 kg (force ~73.80 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of neodymium magnets.

Strengths

Apart from their superior power, neodymium magnets have these key benefits:

They do not lose magnetism, even during nearly ten years – the decrease in lifting capacity is only ~1% (theoretically),
Neodymium magnets are characterized by remarkably resistant to demagnetization caused by external interference,
In other words, due to the metallic layer of gold, the element gains visual value,
The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Possibility of detailed forming as well as optimizing to concrete conditions,
Wide application in future technologies – they serve a role in mass storage devices, brushless drives, medical equipment, also other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Weaknesses

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in creating nuts and complicated shapes in magnets, we recommend using a housing - magnetic holder.
Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:

with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
whose transverse dimension reaches at least 10 mm
characterized by smoothness
under conditions of gap-free contact (surface-to-surface)
under axial application of breakaway force (90-degree angle)
in stable room temperature

Determinants of practical lifting force of a magnet

Please note that the magnet holding will differ influenced by elements below, starting with the most relevant:

Gap (between the magnet and the metal), because even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost to the other side.
Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets

Demagnetization risk

Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Data carriers

Avoid bringing magnets near a purse, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.

Mechanical processing

Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Respect the power

Exercise caution. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.

Precision electronics

GPS units and mobile phones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Life threat

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to handle the magnets.

Serious injuries

Large magnets can smash fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.

Risk of cracking

Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Skin irritation risks

Certain individuals experience a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Prolonged contact may cause a rash. It is best to wear protective gloves.

Keep away from children

Absolutely keep magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are fatal.

Danger! More info about hazards in the article: Magnet Safety Guide.

MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Technical of the product - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - data

Table 1: Static force (pull vs gap) - characteristics MPL 40x20x4x2[7/3.5] / N38

Table 2: Vertical force (vertical surface) MPL 40x20x4x2[7/3.5] / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MPL 40x20x4x2[7/3.5] / N38

Table 4: Steel thickness (saturation) - sheet metal selection MPL 40x20x4x2[7/3.5] / N38

Table 5: Thermal resistance (material behavior) - power drop MPL 40x20x4x2[7/3.5] / N38

Table 6: Two magnets (repulsion) - field collision MPL 40x20x4x2[7/3.5] / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MPL 40x20x4x2[7/3.5] / N38

Table 8: Impact energy (cracking risk) - warning MPL 40x20x4x2[7/3.5] / N38

Table 9: Surface protection spec MPL 40x20x4x2[7/3.5] / N38

Table 10: Electrical data (Flux) MPL 40x20x4x2[7/3.5] / N38

Table 11: Physics of underwater searching MPL 40x20x4x2[7/3.5] / N38

1. Vertical hold

2. Steel saturation

3. Power loss vs temp

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

Material specification

Environmental data

Pulling force

Magnetic Induction

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Strengths and weaknesses of neodymium magnets.

Strengths

Weaknesses

Lifting parameters

Magnetic strength at its maximum – what affects it?

Determinants of practical lifting force of a magnet

Precautions when working with NdFeB magnets

Demagnetization risk

Data carriers

Mechanical processing

Respect the power

Precision electronics

Life threat

Serious injuries

Risk of cracking

Skin irritation risks

Keep away from children

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - characteristics
MPL 40x20x4x2[7/3.5] / N38

Table 2: Vertical force (vertical surface)
MPL 40x20x4x2[7/3.5] / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x20x4x2[7/3.5] / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x20x4x2[7/3.5] / N38

Table 5: Thermal resistance (material behavior) - power drop
MPL 40x20x4x2[7/3.5] / N38

Table 6: Two magnets (repulsion) - field collision
MPL 40x20x4x2[7/3.5] / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x20x4x2[7/3.5] / N38

Table 8: Impact energy (cracking risk) - warning
MPL 40x20x4x2[7/3.5] / N38

Table 9: Surface protection spec
MPL 40x20x4x2[7/3.5] / N38

Table 10: Electrical data (Flux)
MPL 40x20x4x2[7/3.5] / N38

Table 11: Physics of underwater searching
MPL 40x20x4x2[7/3.5] / N38