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MPL 40x7x3 / 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 020162

GTIN/EAN: 5906301811688

5.00

length

40 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.3 g

Magnetization Direction

↑ axial

Load capacity

7.14 kg / 70.02 N

Magnetic Induction

284.46 mT / 2845 Gs

Coating

[NiCuNi] Nickel

see specifications »

2.79 ZŁ with VAT / pcs + price for transport

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Technical specification - MPL 40x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 40x7x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020162
GTIN/EAN	5906301811688
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	7 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	6.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.14 kg / 70.02 N
Magnetic Induction ~ ?	284.46 mT / 2845 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x7x3 / 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

Technical analysis of the assembly - report

Presented data constitute the outcome of a mathematical calculation. Values rely on models for the material Nd₂Fe₁₄B. Actual performance might slightly differ from theoretical values. Treat these data as a reference point for designers.

Table 1: Static force (pull vs gap) - characteristics
MPL 40x7x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2843 Gs 284.3 mT	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N	medium risk
1 mm	2314 Gs 231.4 mT	4.73 kg / 10.43 pounds 4729.9 g / 46.4 N	medium risk
2 mm	1788 Gs 178.8 mT	2.83 kg / 6.23 pounds 2825.3 g / 27.7 N	medium risk
3 mm	1365 Gs 136.5 mT	1.65 kg / 3.63 pounds 1645.1 g / 16.1 N	safe
5 mm	824 Gs 82.4 mT	0.60 kg / 1.32 pounds 599.2 g / 5.9 N	safe
10 mm	317 Gs 31.7 mT	0.09 kg / 0.20 pounds 88.6 g / 0.9 N	safe
15 mm	160 Gs 16.0 mT	0.02 kg / 0.05 pounds 22.5 g / 0.2 N	safe
20 mm	92 Gs 9.2 mT	0.01 kg / 0.02 pounds 7.5 g / 0.1 N	safe
30 mm	38 Gs 3.8 mT	0.00 kg / 0.00 pounds 1.3 g / 0.0 N	safe
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	safe

Magnetic force drops sharply with every mm of spacing. Keep in mind that even the smallest gap (e.g., dirt, paint, rust) strongly diminishes the holding power. Magnets hold most effectively at the point of direct contact; air break drastically cuts the force. Observe how flashily the pull force drop, when the product does not adhere directly to the metal substrate. When planning the assembly, avoid unnecessary gaps.

Table 2: Shear hold (wall)
MPL 40x7x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.15 pounds 1428.0 g / 14.0 N
1 mm	Stal (~0.2)	0.95 kg / 2.09 pounds 946.0 g / 9.3 N
2 mm	Stal (~0.2)	0.57 kg / 1.25 pounds 566.0 g / 5.6 N
3 mm	Stal (~0.2)	0.33 kg / 0.73 pounds 330.0 g / 3.2 N
5 mm	Stal (~0.2)	0.12 kg / 0.26 pounds 120.0 g / 1.2 N
10 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 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 presents the theoretical weight limit sufficient to initiate the shifting of the magnet vertically against a vertical steel wall (considering standard friction). This value is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 40x7x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.14 kg / 4.72 pounds 2142.0 g / 21.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.15 pounds 1428.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.71 kg / 1.57 pounds 714.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.57 kg / 7.87 pounds 3570.0 g / 35.0 N

When mounting a holder on a upright surface (e.g., a car body), it will only hold just about 20%-30% of its nominal power. Gravity and a low friction coefficient influence the fact that products slide down easier than they detach. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the element will slip down under a significantly smaller load. Application of an anti-slip coating can significantly increase the grip.

Table 4: Material efficiency (saturation) - power losses
MPL 40x7x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.71 kg / 1.57 pounds 714.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.94 pounds 1785.0 g / 17.5 N
2 mm	50%	3.57 kg / 7.87 pounds 3570.0 g / 35.0 N
3 mm	75%	5.35 kg / 11.81 pounds 5355.0 g / 52.5 N
5 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
10 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
11 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N
12 mm	100%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N

A too thin steel cannot focus the full magnetic flux, which wastes potential of the magnet. Should you mount a strong magnet to a thin surface, the flux will pass right through and the holding will be smaller. To utilize 100% of this neodymium's power, you require a sufficiently solid piece of metal. The material oversaturation causes that on thin elements (e.g., car bodies), the product shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x7x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.14 kg / 15.74 pounds 7140.0 g / 70.0 N	OK
40 °C	-2.2%	6.98 kg / 15.39 pounds 6982.9 g / 68.5 N	OK
60 °C	-4.4%	6.83 kg / 15.05 pounds 6825.8 g / 67.0 N
80 °C	-6.6%	6.67 kg / 14.70 pounds 6668.8 g / 65.4 N
100 °C	-28.8%	5.08 kg / 11.21 pounds 5083.7 g / 49.9 N

Classic neodymiums change their properties strength above the temperature limit. Protect against heat – heat can permanently damage this product. With increasing heat, the neodymium's force momentarily drops. Do not use this magnet close to heaters higher than its operating temperature limit. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.

*Technical advisory: Thermal stability depends not only on the material grade, but also on the magnet's shape. Flat magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Red status in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MPL 40x7x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.95 kg / 30.75 pounds 4 204 Gs	2.09 kg / 4.61 pounds 2092 g / 20.5 N	N/A
1 mm	11.58 kg / 25.53 pounds 5 180 Gs	1.74 kg / 3.83 pounds 1737 g / 17.0 N	10.42 kg / 22.98 pounds ~0 Gs
2 mm	9.24 kg / 20.37 pounds 4 628 Gs	1.39 kg / 3.06 pounds 1386 g / 13.6 N	8.32 kg / 18.34 pounds ~0 Gs
3 mm	7.19 kg / 15.86 pounds 4 083 Gs	1.08 kg / 2.38 pounds 1079 g / 10.6 N	6.47 kg / 14.27 pounds ~0 Gs
5 mm	4.21 kg / 9.28 pounds 3 124 Gs	0.63 kg / 1.39 pounds 632 g / 6.2 N	3.79 kg / 8.36 pounds ~0 Gs
10 mm	1.17 kg / 2.58 pounds 1 647 Gs	0.18 kg / 0.39 pounds 176 g / 1.7 N	1.05 kg / 2.32 pounds ~0 Gs
20 mm	0.17 kg / 0.38 pounds 633 Gs	0.03 kg / 0.06 pounds 26 g / 0.3 N	0.16 kg / 0.34 pounds ~0 Gs
50 mm	0.01 kg / 0.01 pounds 115 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.01 pounds 76 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 53 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 38 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 28 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 21 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 neodymium and metal setup. The setup of magnet-to-magnet produces a massive flux and a further horizon of action. Want to build a solid fastener? Use a pair of magnets instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the collision energy is extreme. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
* Figures apply to friction force of two matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MPL 40x7x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 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)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field poses a large risk to IT equipment as well as pacemakers. These magnets generate a field that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field acts through matter and glass. Exceptional care must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MPL 40x7x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	34.21 km/h (9.50 m/s)	0.28 J
30 mm	58.81 km/h (16.34 m/s)	0.84 J
50 mm	75.92 km/h (21.09 m/s)	1.40 J
100 mm	107.36 km/h (29.82 m/s)	2.80 J

Magnetic elements are delicate – a strong collision with metal risks their cracking. Watch the impact speed – a neodymium left loose turns into a projectile. Striking energy can cause material chips or painful pinches to fingers. Be sure to control the product during mounting 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 working with powerful specimens.

Table 9: Surface protection spec
MPL 40x7x3 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MPL 40x7x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 379 Mx	63.8 µWb
P_c Coefficient	0.24	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter when building generators as well as sensors. P_c value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MPL 40x7x3 / N38

Environment	Effective steel pull	Effect
Air (land)	7.14 kg	Standard
Water (riverbed)	8.18 kg (+1.04 kg buoyancy gain)	+14.5%

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

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. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains just a fraction of its max power.

2. Steel saturation

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

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.24

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

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%

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: 020162-2026

Measurement Calculator

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Model MPL 40x7x3 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. As a block magnet with high power (approx. 7.14 kg), this product is available immediately 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 shifting 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 40x7x3 / 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 40x7x3 / 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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

Standardly, the MPL 40x7x3 / N38 model is magnetized axially (dimension 3 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. This is the most popular configuration for block magnets used in separators and holders.

The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 7 mm (width), and 3 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 7.14 kg (force ~70.02 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Pros

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:

They retain magnetic properties for nearly 10 years – the loss is just ~1% (according to analyses),
Neodymium magnets prove to be extremely resistant to loss of magnetic properties caused by magnetic disturbances,
A magnet with a metallic nickel surface has better aesthetics,
Neodymium magnets generate maximum magnetic induction on a their surface, which increases force concentration,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
Thanks to freedom in forming and the ability to modify to client solutions,
Wide application in modern industrial fields – they serve a role in mass storage devices, electric drive systems, advanced medical instruments, and multitasking production systems.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:

At very strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
Due to limitations in creating threads and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

The force parameter is a theoretical maximum value performed under the following configuration:

on a block made of mild steel, effectively closing the magnetic flux
with a cross-section of at least 10 mm
characterized by even structure
under conditions of no distance (surface-to-surface)
during pulling in a direction vertical to the plane
at temperature room level

Impact of factors on magnetic holding capacity in practice

Effective lifting capacity is affected by working environment parameters, including (from priority):

Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Direction of force – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Steel type – mild steel gives the best results. Alloy admixtures decrease magnetic properties and holding force.
Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet’s surface and the plate reduces the holding force.

Warnings

Danger to the youngest

Neodymium magnets are not suitable for play. Eating a few magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.

GPS and phone interference

Be aware: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your phone, tablet, and navigation systems.

Safe operation

Exercise caution. Neodymium magnets act from a long distance and connect with massive power, often faster than you can react.

Demagnetization risk

Do not overheat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Protect data

Do not bring magnets near a purse, laptop, or screen. The magnetism can permanently damage these devices and erase data from cards.

Implant safety

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Nickel coating and allergies

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop handling magnets and wear gloves.

Crushing force

Large magnets can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Dust explosion hazard

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Safety First! More info about hazards in the article: Safety of working with magnets.

MPL 40x7x3 / N38 - lamellar magnet

Technical specification - MPL 40x7x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the assembly - report

Table 1: Static force (pull vs gap) - characteristics MPL 40x7x3 / N38

Table 2: Shear hold (wall) MPL 40x7x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 40x7x3 / N38

Table 4: Material efficiency (saturation) - power losses MPL 40x7x3 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MPL 40x7x3 / N38

Table 6: Two magnets (attraction) - field range MPL 40x7x3 / N38

Table 7: Hazards (implants) - warnings MPL 40x7x3 / N38

Table 8: Impact energy (cracking risk) - warning MPL 40x7x3 / N38

Table 9: Surface protection spec MPL 40x7x3 / N38

Table 10: Electrical data (Pc) MPL 40x7x3 / N38

Table 11: Hydrostatics and buoyancy MPL 40x7x3 / N38

1. Wall mount (shear)

2. Steel saturation

3. Power loss vs temp

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

Material specification

Sustainability

Magnet pull force

Field Strength

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Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

Weaknesses

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Warnings

Danger to the youngest

GPS and phone interference

Safe operation

Demagnetization risk

Protect data

Implant safety

Nickel coating and allergies

Crushing force

Beware of splinters

Dust explosion hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - characteristics
MPL 40x7x3 / N38

Table 2: Shear hold (wall)
MPL 40x7x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 40x7x3 / N38

Table 4: Material efficiency (saturation) - power losses
MPL 40x7x3 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x7x3 / N38

Table 6: Two magnets (attraction) - field range
MPL 40x7x3 / N38

Table 7: Hazards (implants) - warnings
MPL 40x7x3 / N38

Table 8: Impact energy (cracking risk) - warning
MPL 40x7x3 / N38

Table 9: Surface protection spec
MPL 40x7x3 / N38

Table 10: Electrical data (P_c)
MPL 40x7x3 / N38

Table 11: Hydrostatics and buoyancy
MPL 40x7x3 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.