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MPL 10x10x4 / N38 - lamellar magnet

lamellar magnet

Catalog no 020112

GTIN/EAN: 5906301811183

5.00

length

10 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3 g

Magnetization Direction

↑ axial

Load capacity

3.10 kg / 30.39 N

Magnetic Induction

360.85 mT / 3608 Gs

Coating

[NiCuNi] Nickel

1.538 with VAT / pcs + price for transport

1.250 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical of the product - MPL 10x10x4 / N38 - lamellar magnet

Specification / characteristics - MPL 10x10x4 / N38 - lamellar magnet

properties
properties values
Cat. no. 020112
GTIN/EAN 5906301811183
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 10 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 3 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.10 kg / 30.39 N
Magnetic Induction ~ ? 360.85 mT / 3608 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 10x10x4 / 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

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering analysis of the assembly - technical parameters

The following values constitute the outcome of a mathematical analysis. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static force (force vs gap) - interaction chart
MPL 10x10x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3606 Gs
360.6 mT
3.10 kg / 6.83 lbs
3100.0 g / 30.4 N
strong
1 mm 3035 Gs
303.5 mT
2.20 kg / 4.84 lbs
2195.5 g / 21.5 N
strong
2 mm 2436 Gs
243.6 mT
1.41 kg / 3.12 lbs
1413.8 g / 13.9 N
low risk
3 mm 1900 Gs
190.0 mT
0.86 kg / 1.90 lbs
860.8 g / 8.4 N
low risk
5 mm 1127 Gs
112.7 mT
0.30 kg / 0.67 lbs
302.7 g / 3.0 N
low risk
10 mm 347 Gs
34.7 mT
0.03 kg / 0.06 lbs
28.8 g / 0.3 N
low risk
15 mm 140 Gs
14.0 mT
0.00 kg / 0.01 lbs
4.6 g / 0.0 N
low risk
20 mm 68 Gs
6.8 mT
0.00 kg / 0.00 lbs
1.1 g / 0.0 N
low risk
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Shear load (wall)
MPL 10x10x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.62 kg / 1.37 lbs
620.0 g / 6.1 N
1 mm Stal (~0.2) 0.44 kg / 0.97 lbs
440.0 g / 4.3 N
2 mm Stal (~0.2) 0.28 kg / 0.62 lbs
282.0 g / 2.8 N
3 mm Stal (~0.2) 0.17 kg / 0.38 lbs
172.0 g / 1.7 N
5 mm Stal (~0.2) 0.06 kg / 0.13 lbs
60.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 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

Table 3: Vertical assembly (shearing) - vertical pull
MPL 10x10x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.93 kg / 2.05 lbs
930.0 g / 9.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.62 kg / 1.37 lbs
620.0 g / 6.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.31 kg / 0.68 lbs
310.0 g / 3.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.55 kg / 3.42 lbs
1550.0 g / 15.2 N

Table 4: Steel thickness (substrate influence) - power losses
MPL 10x10x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.31 kg / 0.68 lbs
310.0 g / 3.0 N
1 mm
25%
0.78 kg / 1.71 lbs
775.0 g / 7.6 N
2 mm
50%
1.55 kg / 3.42 lbs
1550.0 g / 15.2 N
3 mm
75%
2.33 kg / 5.13 lbs
2325.0 g / 22.8 N
5 mm
100%
3.10 kg / 6.83 lbs
3100.0 g / 30.4 N
10 mm
100%
3.10 kg / 6.83 lbs
3100.0 g / 30.4 N
11 mm
100%
3.10 kg / 6.83 lbs
3100.0 g / 30.4 N
12 mm
100%
3.10 kg / 6.83 lbs
3100.0 g / 30.4 N

Table 5: Working in heat (material behavior) - thermal limit
MPL 10x10x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.10 kg / 6.83 lbs
3100.0 g / 30.4 N
OK
40 °C -2.2% 3.03 kg / 6.68 lbs
3031.8 g / 29.7 N
OK
60 °C -4.4% 2.96 kg / 6.53 lbs
2963.6 g / 29.1 N
80 °C -6.6% 2.90 kg / 6.38 lbs
2895.4 g / 28.4 N
100 °C -28.8% 2.21 kg / 4.87 lbs
2207.2 g / 21.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 10x10x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 8.02 kg / 17.68 lbs
5 067 Gs
1.20 kg / 2.65 lbs
1203 g / 11.8 N
N/A
1 mm 6.85 kg / 15.11 lbs
6 667 Gs
1.03 kg / 2.27 lbs
1028 g / 10.1 N
6.17 kg / 13.59 lbs
~0 Gs
2 mm 5.68 kg / 12.52 lbs
6 070 Gs
0.85 kg / 1.88 lbs
852 g / 8.4 N
5.11 kg / 11.27 lbs
~0 Gs
3 mm 4.60 kg / 10.14 lbs
5 463 Gs
0.69 kg / 1.52 lbs
690 g / 6.8 N
4.14 kg / 9.13 lbs
~0 Gs
5 mm 2.87 kg / 6.32 lbs
4 313 Gs
0.43 kg / 0.95 lbs
430 g / 4.2 N
2.58 kg / 5.69 lbs
~0 Gs
10 mm 0.78 kg / 1.73 lbs
2 254 Gs
0.12 kg / 0.26 lbs
117 g / 1.2 N
0.70 kg / 1.55 lbs
~0 Gs
20 mm 0.07 kg / 0.16 lbs
695 Gs
0.01 kg / 0.02 lbs
11 g / 0.1 N
0.07 kg / 0.15 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
76 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
46 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
30 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
21 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
15 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
11 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (electronics) - warnings
MPL 10x10x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - warning
MPL 10x10x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 32.61 km/h
(9.06 m/s)
0.12 J
30 mm 56.15 km/h
(15.60 m/s)
0.36 J
50 mm 72.49 km/h
(20.14 m/s)
0.61 J
100 mm 102.52 km/h
(28.48 m/s)
1.22 J

Table 9: Surface protection spec
MPL 10x10x4 / 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)

Table 10: Electrical data (Flux)
MPL 10x10x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 760 Mx 37.6 µWb
Pc Coefficient 0.46 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 10x10x4 / N38

Environment Effective steel pull Effect
Air (land) 3.10 kg Standard
Water (riverbed) 3.55 kg
(+0.45 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.
1. Sliding resistance

*Warning: On a vertical surface, the magnet retains only ~20% of its nominal pull.

2. Steel thickness impact

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

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.46

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 Pc (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 Pc 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%
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: 020112-2026
Quick Unit Converter
Pulling force

Field Strength

Other offers

Model MPL 10x10x4 / N38 features a flat shape and professional pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 3.10 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating protects 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. To separate the MPL 10x10x4 / 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.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 3.10 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 10x10x4 / N38 model is magnetized axially (dimension 4 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. 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: 10 mm (length), 10 mm (width), and 4 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 3.10 kg (force ~30.39 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • They feature excellent resistance to magnetic field loss due to external fields,
  • In other words, due to the aesthetic layer of gold, the element is aesthetically pleasing,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • In view of the possibility of flexible shaping and customization to individualized solutions, NdFeB magnets can be produced in a broad palette of forms and dimensions, which increases their versatility,
  • Significant place in modern industrial fields – they are commonly used in computer drives, drive modules, medical equipment, and complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited ability of creating nuts in the magnet and complex forms - recommended is a housing - magnetic holder.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small elements of these devices can be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Maximum lifting force for a neodymium magnet – what affects it?

Holding force of 3.10 kg is a result of laboratory testing performed under standard conditions:
  • with the application of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with an ideally smooth touching surface
  • without the slightest clearance between the magnet and steel
  • during pulling in a direction vertical to the mounting surface
  • in stable room temperature

Magnet lifting force in use – key factors

In practice, the actual lifting capacity is determined by many variables, ranked from the most important:
  • Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel does not close the flux, causing part of the flux to be escaped into the air.
  • Plate material – mild steel attracts best. Alloy steels reduce magnetic permeability and lifting capacity.
  • Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

H&S for magnets
Crushing risk

Big blocks can crush fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

Beware of splinters

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Magnetic interference

Be aware: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Dust is flammable

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Adults only

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Keep out of reach of children and animals.

Handling guide

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Permanent damage

Control the heat. Heating the magnet to high heat will ruin its properties and pulling force.

Warning for allergy sufferers

It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands and select encased magnets.

Electronic hazard

Data protection: Strong magnets can ruin data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

ICD Warning

Warning for patients: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Warning! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98