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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 specifications »

3.67 ZŁ with VAT / pcs + price for transport

2.98 ZŁ net + 23% VAT / pcs

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Detailed specification - 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

Physical modeling of the magnet - technical parameters

The following data represent the outcome of a mathematical calculation. Results rely on models for the class Nd₂Fe₁₄B. Actual parameters might slightly deviate from the simulation results. Treat these data as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs distance) - 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	low risk
5 mm	1130 Gs 113.0 mT	0.54 kg / 1.19 lbs 538.9 g / 5.3 N	low risk
10 mm	416 Gs 41.6 mT	0.07 kg / 0.16 lbs 73.0 g / 0.7 N	low risk
15 mm	187 Gs 18.7 mT	0.01 kg / 0.03 lbs 14.7 g / 0.1 N	low risk
20 mm	97 Gs 9.7 mT	0.00 kg / 0.01 lbs 4.0 g / 0.0 N	low risk
30 mm	35 Gs 3.5 mT	0.00 kg / 0.00 lbs 0.5 g / 0.0 N	low risk
50 mm	9 Gs 0.9 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	low risk

Magnetic force weakens drastically with every mm of spacing. Note that even a very thin break (e.g., dirt, varnish, veneer) significantly reduces the pull force. Neodymiums work strongest during direct contact; gap drastically cuts the power. Observe how flashily the load capacity plummet, when the magnet does not touch directly to the metal substrate. When calculating the arrangement, avoid redundant distances.

Table 2: Vertical load (vertical surface)
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

This section defines the theoretical weight limit required to initiate the shifting of the magnet downwards against a upright steel plate (assuming standard friction coefficient). This value varies with the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - 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 holder on a vertical wall (e.g., a board), it you can count on barely about 20%-30% of its maximum pull force. Gravity and a weak degree of grip influence the fact that products slide down easier than they pull off. Planning a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the magnet will slide down under a noticeably lighter weight. Using a rubber coating can significantly increase the grip.

Table 4: Material efficiency (saturation) - power losses
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 thin metal plate is not enough to conduct the entire magnetic field, which squanders power of the magnet. If you attach a powerful product to a too thin substrate, the magnetism will penetrate right through and the pull force will drop sharply. To achieve the maximum of this neodymium's power, you need a suitably thick backing of metal. The saturation effect causes that on delicate walls (e.g., car bodies), the magnet works worse. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - power drop
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

Standard neodymium magnets change their properties strength above the temperature limit. Watch out for overheating – high temperature can irreversibly damage this magnet. As the temperature rises, the neodymium's power briefly drops. Do not use this product near heat sources higher than its operating temperature limit. Too high temperature will result in permanent loss of magnetism.

*Important note: Heat tolerance is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MPL 20x8x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear 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 magnetic products attract each other from a wider radius than a neodymium and metal setup. Such a system of magnet-to-magnet generates a stronger field and a wider radius of action. Designing a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the collision energy is massive. The levitation is marginally weaker than the connection force, but still large.
*Field value in repulsion mode drops to ~0 Gs at the midpoint of the gap (due to field cancellation).
* Estimates apply to shear force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - precautionary measures
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

Powerful magnet radiation poses a serious hazard to electronic devices as well as pacemakers. These NdFeB products generate a flux that disrupts operation of sensitive medical devices. Be aware: the unseen radiation acts through matter and housings. Special caution must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
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 violent impact against metal risks their cracking. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when working 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 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 20x8x4 / N38

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

Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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%

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

The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds just a fraction of its nominal pull.

2. Steel saturation

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

3. Power loss vs temp

*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) = 0.38

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.

Technical specification and ecology

Elemental analysis

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

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Component MPL 20x8x4 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 46.98 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating block 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 4.79 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 20x8x4 / 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. 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (20x8 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

The presented product is a neodymium magnet with precisely defined parameters: 20 mm (length), 8 mm (width), and 4 mm (thickness). 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 protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They do not lose magnetism, even after approximately 10 years – the drop in lifting capacity is only ~1% (based on measurements),
They are extremely resistant to demagnetization induced by external field influence,
The use of an refined coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
Thanks to the ability of precise molding and adaptation to specialized requirements, neodymium magnets can be manufactured in a broad palette of forms and dimensions, which makes them more universal,
Key role in high-tech industry – they are used in data components, drive modules, medical equipment, as well as technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions

Cons

Drawbacks and weaknesses of neodymium magnets and proposals for their use:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
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 and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
Limited possibility of creating threads in the magnet and complicated forms - preferred is casing - magnet mounting.
Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Information about lifting capacity was defined for ideal contact conditions, including:

on a base made of mild steel, perfectly concentrating the magnetic field
whose transverse dimension equals approx. 10 mm
characterized by even structure
under conditions of gap-free contact (surface-to-surface)
for force applied at a right angle (pull-off, not shear)
in stable room temperature

Determinants of practical lifting force of a magnet

It is worth knowing that the magnet holding may be lower subject to the following factors, in order of importance:

Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of maximum force).
Steel thickness – insufficiently thick plate does not accept the full field, causing part of the power to be lost to the other side.
Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with NdFeB magnets

Choking Hazard

These products are not suitable for play. Swallowing several magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.

Crushing risk

Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness appears, immediately stop handling magnets and wear gloves.

Flammability

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Safe distance

Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, timepieces).

Protective goggles

Neodymium magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets leads to them breaking into small pieces.

Life threat

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Do not overheat magnets

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Immense force

Exercise caution. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can react.

Impact on smartphones

Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

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

MPL 20x8x4 / N38 - lamellar magnet

Detailed specification - MPL 20x8x4 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - technical parameters

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

Table 2: Vertical load (vertical surface) MPL 20x8x4 / N38

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

Table 4: Material efficiency (saturation) - power losses MPL 20x8x4 / N38

Table 5: Thermal stability (material behavior) - power drop MPL 20x8x4 / N38

Table 6: Two magnets (attraction) - field range MPL 20x8x4 / N38

Table 7: Protective zones (implants) - precautionary measures MPL 20x8x4 / N38

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

Table 9: Surface protection spec MPL 20x8x4 / N38

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

Table 11: Hydrostatics and buoyancy MPL 20x8x4 / N38

1. Sliding resistance

2. Steel saturation

3. Power loss vs temp

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

Elemental analysis

Environmental data

Pulling force

Magnetic Induction

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Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Cons

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Determinants of practical lifting force of a magnet

Safety rules for work with NdFeB magnets

Choking Hazard

Crushing risk

Metal Allergy

Flammability

Safe distance

Protective goggles

Life threat

Do not overheat magnets

Immense force

Impact on smartphones

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Vertical load (vertical surface)
MPL 20x8x4 / N38

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

Table 4: Material efficiency (saturation) - power losses
MPL 20x8x4 / N38

Table 5: Thermal stability (material behavior) - power drop
MPL 20x8x4 / N38

Table 6: Two magnets (attraction) - field range
MPL 20x8x4 / N38

Table 7: Protective zones (implants) - precautionary measures
MPL 20x8x4 / N38

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

Table 9: Surface protection spec
MPL 20x8x4 / N38

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

Table 11: Hydrostatics and buoyancy
MPL 20x8x4 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.