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MPL 30x20x4 / 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 020286

GTIN/EAN: 5906301811848

length

30 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

18 g

Magnetization Direction

↑ axial

Load capacity

6.30 kg / 61.84 N

Magnetic Induction

180.57 mT / 1806 Gs

Coating

[NiCuNi] Nickel

technical specifications »

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Detailed specification - MPL 30x20x4 / N38 - lamellar magnet

Specification / characteristics - MPL 30x20x4 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020286
GTIN/EAN	5906301811848
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	30 mm [±0,1 mm]
Width	20 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	18 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.30 kg / 61.84 N
Magnetic Induction ~ ?	180.57 mT / 1806 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x20x4 / 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 magnet - report

Presented data are the outcome of a physical simulation. Values are based on algorithms for the material Nd₂Fe₁₄B. Operational performance may differ. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
MPL 30x20x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1805 Gs 180.5 mT	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N	warning
1 mm	1728 Gs 172.8 mT	5.77 kg / 12.72 lbs 5771.5 g / 56.6 N	warning
2 mm	1628 Gs 162.8 mT	5.13 kg / 11.30 lbs 5125.7 g / 50.3 N	warning
3 mm	1515 Gs 151.5 mT	4.43 kg / 9.78 lbs 4434.6 g / 43.5 N	warning
5 mm	1271 Gs 127.1 mT	3.12 kg / 6.89 lbs 3124.3 g / 30.6 N	warning
10 mm	751 Gs 75.1 mT	1.09 kg / 2.40 lbs 1088.7 g / 10.7 N	safe
15 mm	435 Gs 43.5 mT	0.37 kg / 0.81 lbs 366.3 g / 3.6 N	safe
20 mm	262 Gs 26.2 mT	0.13 kg / 0.29 lbs 132.6 g / 1.3 N	safe
30 mm	110 Gs 11.0 mT	0.02 kg / 0.05 lbs 23.2 g / 0.2 N	safe
50 mm	30 Gs 3.0 mT	0.00 kg / 0.00 lbs 1.8 g / 0.0 N	safe

Pulling power decreases drastically per each millimeter of spacing. Note that even the smallest gap (e.g., contamination, varnish, rust) significantly reduces the pull force. Magnetic products operate strongest at the point of direct contact; distance drastically cuts the force. Observe how rapidly the load capacity fall, when the product does not adhere directly to the metal substrate. When calculating the assembly, eliminate additional spacers.

Table 2: Vertical capacity (vertical surface)
MPL 30x20x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.26 kg / 2.78 lbs 1260.0 g / 12.4 N
1 mm	Stal (~0.2)	1.15 kg / 2.54 lbs 1154.0 g / 11.3 N
2 mm	Stal (~0.2)	1.03 kg / 2.26 lbs 1026.0 g / 10.1 N
3 mm	Stal (~0.2)	0.89 kg / 1.95 lbs 886.0 g / 8.7 N
5 mm	Stal (~0.2)	0.62 kg / 1.38 lbs 624.0 g / 6.1 N
10 mm	Stal (~0.2)	0.22 kg / 0.48 lbs 218.0 g / 2.1 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 lbs 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 26.0 g / 0.3 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below shows the approximate holding capacity required to cause the slippage of the magnet vertically against a upright steel wall (considering typical friction). This value depends on the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 30x20x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.89 kg / 4.17 lbs 1890.0 g / 18.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.26 kg / 2.78 lbs 1260.0 g / 12.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.63 kg / 1.39 lbs 630.0 g / 6.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.15 kg / 6.94 lbs 3150.0 g / 30.9 N

When placing a holder on a upright surface (e.g., a fridge), it you can count on barely approx. 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip cause that magnets move down faster than they detach. Designing a hanger? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slip down under a much lighter weight. Utilizing a rubberized layer can drastically improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 30x20x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.63 kg / 1.39 lbs 630.0 g / 6.2 N
1 mm	25%	1.58 kg / 3.47 lbs 1575.0 g / 15.5 N
2 mm	50%	3.15 kg / 6.94 lbs 3150.0 g / 30.9 N
3 mm	75%	4.73 kg / 10.42 lbs 4725.0 g / 46.4 N
5 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
10 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
11 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
12 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N

A too thin steel cannot absorb the full magnetic flux, which weakens actual performance of the holder. If you mount a strong magnet to a weak sheet, the field will penetrate right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's power, you need a suitably thick element of metal. The saturation effect causes that on sheet metal structures (e.g., appliance housings), the holder works worse. We suggest choosing the steel cross-section based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MPL 30x20x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N	OK
40 °C	-2.2%	6.16 kg / 13.58 lbs 6161.4 g / 60.4 N	OK
60 °C	-4.4%	6.02 kg / 13.28 lbs 6022.8 g / 59.1 N
80 °C	-6.6%	5.88 kg / 12.97 lbs 5884.2 g / 57.7 N
100 °C	-28.8%	4.49 kg / 9.89 lbs 4485.6 g / 44.0 N

Classic neodymiums irreversibly lose parameters past the thermal threshold. Watch out for overheating – heat can irreversibly destroy this product. As the temperature rises, the magnet's power briefly decreases. Avoid using this product near heat sources exceeding its safe range. Too high temperature will lead to irreversible degradation of magnetism.

*Technical advisory: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Thin magnets (pancake types) are more susceptible to demagnetization under lower heat stress than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 30x20x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	12.06 kg / 26.58 lbs 3 198 Gs	1.81 kg / 3.99 lbs 1809 g / 17.7 N	N/A
1 mm	11.59 kg / 25.55 lbs 3 540 Gs	1.74 kg / 3.83 lbs 1739 g / 17.1 N	10.43 kg / 23.00 lbs ~0 Gs
2 mm	11.05 kg / 24.35 lbs 3 456 Gs	1.66 kg / 3.65 lbs 1657 g / 16.3 N	9.94 kg / 21.92 lbs ~0 Gs
3 mm	10.45 kg / 23.03 lbs 3 361 Gs	1.57 kg / 3.45 lbs 1567 g / 15.4 N	9.40 kg / 20.73 lbs ~0 Gs
5 mm	9.15 kg / 20.18 lbs 3 146 Gs	1.37 kg / 3.03 lbs 1373 g / 13.5 N	8.24 kg / 18.16 lbs ~0 Gs
10 mm	5.98 kg / 13.18 lbs 2 543 Gs	0.90 kg / 1.98 lbs 897 g / 8.8 N	5.38 kg / 11.86 lbs ~0 Gs
20 mm	2.08 kg / 4.59 lbs 1 501 Gs	0.31 kg / 0.69 lbs 313 g / 3.1 N	1.88 kg / 4.13 lbs ~0 Gs
50 mm	0.10 kg / 0.22 lbs 331 Gs	0.02 kg / 0.03 lbs 15 g / 0.1 N	0.09 kg / 0.20 lbs ~0 Gs
60 mm	0.04 kg / 0.10 lbs 219 Gs	0.01 kg / 0.01 lbs 7 g / 0.1 N	0.04 kg / 0.09 lbs ~0 Gs
70 mm	0.02 kg / 0.05 lbs 151 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
80 mm	0.01 kg / 0.02 lbs 108 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs
90 mm	0.01 kg / 0.01 lbs 80 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.01 lbs 60 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and steel setup. The connection of two magnets generates a stronger field and a further horizon of operation. Planning to create a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration drops to ~0 Gs at the geometric center between the magnets (due to field cancellation).
* Calculations show shear force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - warnings
MPL 30x20x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.0 cm
Hearing aid	10 Gs (1.0 mT)	7.5 cm
Mechanical watch	20 Gs (2.0 mT)	6.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.5 cm
Car key	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 serious hazard to electronic devices and medical implants. These magnets generate a field that destroys function of sensitive medical devices. Notice: the unseen radiation passes through tissues and plastic. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MPL 30x20x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.81 km/h (5.78 m/s)	0.30 J
30 mm	32.75 km/h (9.10 m/s)	0.75 J
50 mm	42.20 km/h (11.72 m/s)	1.24 J
100 mm	59.66 km/h (16.57 m/s)	2.47 J

NdFeB products are prone to chipping – a strong collision with metal causes immediate chipping. Control the attraction moment – a magnet released freely turns into a projectile. Striking energy can cause material chips or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
MPL 30x20x4 / 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. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MPL 30x20x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	12 775 Mx	127.8 µWb
P_c Coefficient	0.22	Low (Flat)

Total magnetic flux emitted by the pole surface. Key data when building generators and motors. P_c value determines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 30x20x4 / N38

Environment	Effective steel pull	Effect
Air (land)	6.30 kg	Standard
Water (riverbed)	7.21 kg (+0.91 kg buoyancy gain)	+14.5%

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

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

1. Shear force

*Note: On a vertical surface, the magnet retains just ~20% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

*For standard magnets, 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) = 0.22

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%

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: 020286-2026

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This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 30x20x4 mm and a weight of 18 g, guarantees premium class connection. As a magnetic bar with high power (approx. 6.30 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

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. Watch your fingers! Magnets with a force of 6.30 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.

Plate magnets MPL 30x20x4 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 6.30 kg), they are ideal as closers in furniture making and mounting elements in automation. 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).

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 (30x20 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.

This model is characterized by dimensions 30x20x4 mm, which, at a weight of 18 g, makes it an element with high energy density. It is a magnetic block with dimensions 30x20x4 mm and a self-weight of 18 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of rare earth magnets.

Advantages

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

Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (theoretically),
They do not lose their magnetic properties even under strong external field,
A magnet with a shiny gold surface has an effective appearance,
Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
In view of the potential of precise shaping and customization to unique solutions, NdFeB magnets can be produced in a wide range of geometric configurations, which amplifies use scope,
Universal use in advanced technology sectors – they find application in data components, electric motors, advanced medical instruments, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in miniature devices

Weaknesses

Drawbacks and weaknesses of neodymium magnets: application proposals

At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
Neodymium magnets decrease their force 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 stability even at temperatures up to 230°C
They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Limited ability of making threads in the magnet and complex shapes - recommended is casing - magnetic holder.
Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Furthermore, small components of these devices can complicate diagnosis medical when they are in the body.
With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Detachment force of the magnet in optimal conditions – what affects it?

Information about lifting capacity was defined for optimal configuration, taking into account:

with the application of a yoke made of special test steel, ensuring maximum field concentration
with a cross-section no less than 10 mm
with an polished contact surface
under conditions of gap-free contact (metal-to-metal)
for force applied at a right angle (in the magnet axis)
at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Please note that the application force will differ subject to the following factors, starting with the most relevant:

Air gap (between the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
Temperature – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was determined by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Warnings

Compass and GPS

A powerful magnetic field interferes with the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Power loss in heat

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its properties and strength.

Keep away from computers

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

Dust explosion hazard

Powder created during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Bodily injuries

Mind your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Warning for heart patients

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Warning for allergy sufferers

A percentage of the population have a contact allergy to nickel, which is the standard coating for NdFeB magnets. Prolonged contact might lead to skin redness. We strongly advise use protective gloves.

Shattering risk

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Swallowing risk

Absolutely store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are life-threatening.

Do not underestimate power

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.

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

MPL 30x20x4 / N38 - lamellar magnet

Detailed specification - MPL 30x20x4 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - report

Table 1: Static pull force (force vs gap) - interaction chart MPL 30x20x4 / N38

Table 2: Vertical capacity (vertical surface) MPL 30x20x4 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MPL 30x20x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MPL 30x20x4 / N38

Table 5: Thermal resistance (material behavior) - power drop MPL 30x20x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MPL 30x20x4 / N38

Table 7: Hazards (implants) - warnings MPL 30x20x4 / N38

Table 8: Impact energy (cracking risk) - collision effects MPL 30x20x4 / N38

Table 9: Surface protection spec MPL 30x20x4 / N38

Table 10: Construction data (Flux) MPL 30x20x4 / N38

Table 11: Physics of underwater searching MPL 30x20x4 / N38

1. Shear force

2. Plate thickness effect

3. Power loss vs temp

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

Chemical composition

Sustainability

Force (pull)

Magnetic Induction

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Advantages and disadvantages of rare earth magnets.

Advantages

Weaknesses

Lifting parameters

Detachment force of the magnet in optimal conditions – what affects it?

Practical lifting capacity: influencing factors

Warnings

Compass and GPS

Power loss in heat

Keep away from computers

Dust explosion hazard

Bodily injuries

Warning for heart patients

Warning for allergy sufferers

Shattering risk

Swallowing risk

Do not underestimate power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - interaction chart
MPL 30x20x4 / N38

Table 2: Vertical capacity (vertical surface)
MPL 30x20x4 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 30x20x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 30x20x4 / N38

Table 5: Thermal resistance (material behavior) - power drop
MPL 30x20x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 30x20x4 / N38

Table 7: Hazards (implants) - warnings
MPL 30x20x4 / N38

Table 8: Impact energy (cracking risk) - collision effects
MPL 30x20x4 / N38

Table 9: Surface protection spec
MPL 30x20x4 / N38

Table 10: Construction data (Flux)
MPL 30x20x4 / N38

Table 11: Physics of underwater searching
MPL 30x20x4 / N38