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MPL 20x5x3 / 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 020131

GTIN/EAN: 5906301811374

5.00

length

20 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

2.25 g

Magnetization Direction

↑ axial

Load capacity

3.46 kg / 33.96 N

Magnetic Induction

358.88 mT / 3589 Gs

Coating

[NiCuNi] Nickel

see parameters »

1.058 ZŁ with VAT / pcs + price for transport

0.860 ZŁ net + 23% VAT / pcs

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Product card - MPL 20x5x3 / N38 - lamellar magnet

Specification / characteristics - MPL 20x5x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020131
GTIN/EAN	5906301811374
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	5 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	2.25 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.46 kg / 33.96 N
Magnetic Induction ~ ?	358.88 mT / 3589 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x5x3 / 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 modeling of the magnet - technical parameters

The following information constitute the direct effect of a engineering analysis. Results are based on algorithms for the material Nd₂Fe₁₄B. Actual conditions may differ from theoretical values. Please consider these data as a supplementary guide for designers.

Table 1: Static force (pull vs gap) - power drop
MPL 20x5x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3585 Gs 358.5 mT	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N	strong
1 mm	2619 Gs 261.9 mT	1.85 kg / 4.07 LBS 1846.6 g / 18.1 N	low risk
2 mm	1818 Gs 181.8 mT	0.89 kg / 1.96 LBS 889.8 g / 8.7 N	low risk
3 mm	1279 Gs 127.9 mT	0.44 kg / 0.97 LBS 440.2 g / 4.3 N	low risk
5 mm	696 Gs 69.6 mT	0.13 kg / 0.29 LBS 130.6 g / 1.3 N	low risk
10 mm	225 Gs 22.5 mT	0.01 kg / 0.03 LBS 13.6 g / 0.1 N	low risk
15 mm	97 Gs 9.7 mT	0.00 kg / 0.01 LBS 2.5 g / 0.0 N	low risk
20 mm	49 Gs 4.9 mT	0.00 kg / 0.00 LBS 0.6 g / 0.0 N	low risk
30 mm	17 Gs 1.7 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	low risk
50 mm	4 Gs 0.4 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk

Magnetic force weakens significantly per each millimeter of spacing. Keep in mind that even a microscopic distance (e.g., contamination, varnish, veneer) strongly reduces the pull force. Neodymiums operate strongest at the point of direct contact; gap weakens the power. See how flashily the pull force fall, when the magnet does not touch directly to the metal substrate. When designing the mounting, avoid additional spacers.

Table 2: Sliding force (vertical surface)
MPL 20x5x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.69 kg / 1.53 LBS 692.0 g / 6.8 N
1 mm	Stal (~0.2)	0.37 kg / 0.82 LBS 370.0 g / 3.6 N
2 mm	Stal (~0.2)	0.18 kg / 0.39 LBS 178.0 g / 1.7 N
3 mm	Stal (~0.2)	0.09 kg / 0.19 LBS 88.0 g / 0.9 N
5 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 26.0 g / 0.3 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 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 holding capacity sufficient to start the sliding of the magnet downwards against a upright steel plate (considering typical friction coefficient). The holding force depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 20x5x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.04 kg / 2.29 LBS 1038.0 g / 10.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.69 kg / 1.53 LBS 692.0 g / 6.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.35 kg / 0.76 LBS 346.0 g / 3.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.73 kg / 3.81 LBS 1730.0 g / 17.0 N

When mounting a element on a vertical wall (e.g., a board), it you can count on only approx. 20%-30% of nominal attraction strength. Gravitational force and a weak degree of grip mean that products slide down faster than they pop off the substrate. Designing a hanger? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the holder will give way down under a noticeably lighter weight. Utilizing a rubberized coating can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 20x5x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.35 kg / 0.76 LBS 346.0 g / 3.4 N
1 mm	25%	0.87 kg / 1.91 LBS 865.0 g / 8.5 N
2 mm	50%	1.73 kg / 3.81 LBS 1730.0 g / 17.0 N
3 mm	75%	2.59 kg / 5.72 LBS 2595.0 g / 25.5 N
5 mm	100%	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N
10 mm	100%	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N
11 mm	100%	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N
12 mm	100%	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N

A thin sheet is incapable of absorb the entire magnetic field, which wastes potential of the magnet. Should you install a neodymium to a too thin substrate, the field will pass right through and the pull force will drop sharply. To achieve 100% of this neodymium's power, you require a sufficiently solid element of steel. The saturation effect means that on thin elements (e.g., car bodies), the product shows lower pull force. We advise picking the steel thickness from these parameters.

Table 5: Working in heat (material behavior) - thermal limit
MPL 20x5x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.46 kg / 7.63 LBS 3460.0 g / 33.9 N	OK
40 °C	-2.2%	3.38 kg / 7.46 LBS 3383.9 g / 33.2 N	OK
60 °C	-4.4%	3.31 kg / 7.29 LBS 3307.8 g / 32.4 N
80 °C	-6.6%	3.23 kg / 7.12 LBS 3231.6 g / 31.7 N
100 °C	-28.8%	2.46 kg / 5.43 LBS 2463.5 g / 24.2 N

Standard neodymium magnets irreversibly lose power past the thermal threshold. Avoid high temperatures – heat can permanently destroy this product. With every degree above norm, the magnet's power momentarily lowers. Do not use this product close to heaters higher than its operating temperature limit. Ignoring the limit will result in destruction of magnetism.

*Engineering note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) may lose charge permanently under lower heat stress than taller cylinders. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 20x5x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	7.92 kg / 17.47 LBS 4 860 Gs	1.19 kg / 2.62 LBS 1189 g / 11.7 N	N/A
1 mm	5.94 kg / 13.10 LBS 6 209 Gs	0.89 kg / 1.97 LBS 891 g / 8.7 N	5.35 kg / 11.79 LBS ~0 Gs
2 mm	4.23 kg / 9.32 LBS 5 238 Gs	0.63 kg / 1.40 LBS 634 g / 6.2 N	3.81 kg / 8.39 LBS ~0 Gs
3 mm	2.94 kg / 6.49 LBS 4 369 Gs	0.44 kg / 0.97 LBS 441 g / 4.3 N	2.65 kg / 5.84 LBS ~0 Gs
5 mm	1.42 kg / 3.14 LBS 3 039 Gs	0.21 kg / 0.47 LBS 213 g / 2.1 N	1.28 kg / 2.82 LBS ~0 Gs
10 mm	0.30 kg / 0.66 LBS 1 393 Gs	0.04 kg / 0.10 LBS 45 g / 0.4 N	0.27 kg / 0.59 LBS ~0 Gs
20 mm	0.03 kg / 0.07 LBS 450 Gs	0.00 kg / 0.01 LBS 5 g / 0.0 N	0.03 kg / 0.06 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 56 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 34 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 23 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 16 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 11 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 8 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 magnet and steel combination. Such a system of two magnets produces a massive flux and a further horizon of performance. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs at the midpoint of the gap (due to field cancellation).
Note: Estimates show friction force of a pair of matching magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 20x5x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.0 cm
Hearing aid	10 Gs (1.0 mT)	4.0 cm
Timepiece	20 Gs (2.0 mT)	3.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	2.5 cm
Remote	50 Gs (5.0 mT)	2.0 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 real danger to electronics and medical implants. These neodymiums produce a field that prevents correct functioning of digital equipment. Be aware: the unseen radiation penetrates the body and housings. Exceptional care must be taken by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MPL 20x5x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	39.65 km/h (11.01 m/s)	0.14 J
30 mm	68.50 km/h (19.03 m/s)	0.41 J
50 mm	88.43 km/h (24.56 m/s)	0.68 J
100 mm	125.06 km/h (34.74 m/s)	1.36 J

NdFeB products are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Impact energy can cause material chips or painful pinches to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the metal. A collision at high speed means shattering of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Coating parameters (durability)
MPL 20x5x3 / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MPL 20x5x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	3 197 Mx	32.0 µWb
P_c Coefficient	0.36	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 20x5x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.46 kg	Standard
Water (riverbed)	3.96 kg (+0.50 kg buoyancy gain)	+14.5%

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

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) significantly reduces 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) = 0.36

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 specification and ecology

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%

Ecology and recycling (GPSR)

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: 020131-2026

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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 20x5x3 mm and a weight of 2.25 g, guarantees the highest quality connection. As a block magnet with high power (approx. 3.46 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 sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 3.46 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 20x5x3 / 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.

For mounting flat magnets MPL 20x5x3 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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: 20 mm (length), 5 mm (width), and 3 mm (thickness). The key parameter here is the holding force amounting to approximately 3.46 kg (force ~33.96 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros and cons of neodymium magnets.

Advantages

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

Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
Neodymium magnets are characterized by exceptionally resistant to demagnetization caused by external interference,
A magnet with a smooth gold surface looks better,
Magnetic induction on the working part of the magnet is exceptional,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to freedom in forming and the ability to customize to individual projects,
Wide application in innovative solutions – they find application in mass storage devices, brushless drives, medical devices, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices

Limitations

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
We warn that neodymium magnets can lose their power 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 while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in realizing threads and complex forms in magnets, we recommend using cover - magnetic holder.
Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum magnetic pulling force – what it depends on?

Holding force of 3.46 kg is a measurement result performed under the following configuration:

using a sheet made of low-carbon steel, functioning as a circuit closing element
possessing a massiveness of at least 10 mm to avoid saturation
with a surface cleaned and smooth
without the slightest air gap between the magnet and steel
under axial force vector (90-degree angle)
at temperature room level

Determinants of lifting force in real conditions

It is worth knowing that the application force may be lower depending on elements below, starting with the most relevant:

Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
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.
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material composition – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets

Fire risk

Machining of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Phone sensors

An intense magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Keep magnets close to a device to avoid breaking the sensors.

Pinching danger

Protect your hands. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Protective goggles

Watch out for shards. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Protect data

Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Safe operation

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Heat sensitivity

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Pacemakers

Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Nickel allergy

Medical facts indicate that nickel (the usual finish) is a strong allergen. If you have an allergy, avoid touching magnets with bare hands or opt for versions in plastic housing.

Do not give to children

Neodymium magnets are not intended for children. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a severe health hazard and requires urgent medical intervention.

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

MPL 20x5x3 / N38 - lamellar magnet

Product card - MPL 20x5x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the magnet - technical parameters

Table 1: Static force (pull vs gap) - power drop MPL 20x5x3 / N38

Table 2: Sliding force (vertical surface) MPL 20x5x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MPL 20x5x3 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MPL 20x5x3 / N38

Table 5: Working in heat (material behavior) - thermal limit MPL 20x5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MPL 20x5x3 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MPL 20x5x3 / N38

Table 8: Collisions (kinetic energy) - warning MPL 20x5x3 / N38

Table 9: Coating parameters (durability) MPL 20x5x3 / N38

Table 10: Construction data (Flux) MPL 20x5x3 / N38

Table 11: Physics of underwater searching MPL 20x5x3 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

Other proposals

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MW 8x20 / N38 - cylindrical magnet

MW 5x3 / N38 - cylindrical magnet

MW 80x30 / N38 - cylindrical magnet

Pros and cons of neodymium magnets.

Advantages

Limitations

Pull force analysis

Maximum magnetic pulling force – what it depends on?

Determinants of lifting force in real conditions

H&S for magnets

Fire risk

Phone sensors

Pinching danger

Protective goggles

Protect data

Safe operation

Heat sensitivity

Pacemakers

Nickel allergy

Do not give to children

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MPL 20x5x3 / N38

Table 2: Sliding force (vertical surface)
MPL 20x5x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 20x5x3 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 20x5x3 / N38

Table 5: Working in heat (material behavior) - thermal limit
MPL 20x5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 20x5x3 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 20x5x3 / N38

Table 8: Collisions (kinetic energy) - warning
MPL 20x5x3 / N38

Table 9: Coating parameters (durability)
MPL 20x5x3 / N38

Table 10: Construction data (Flux)
MPL 20x5x3 / N38

Table 11: Physics of underwater searching
MPL 20x5x3 / N38