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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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Detailed specification - 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

Technical simulation of the product - data

The following values represent the result of a mathematical calculation. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - power drop
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 pounds
3100.0 g / 30.4 N
strong
1 mm 3035 Gs
303.5 mT
2.20 kg / 4.84 pounds
2195.5 g / 21.5 N
strong
2 mm 2436 Gs
243.6 mT
1.41 kg / 3.12 pounds
1413.8 g / 13.9 N
safe
3 mm 1900 Gs
190.0 mT
0.86 kg / 1.90 pounds
860.8 g / 8.4 N
safe
5 mm 1127 Gs
112.7 mT
0.30 kg / 0.67 pounds
302.7 g / 3.0 N
safe
10 mm 347 Gs
34.7 mT
0.03 kg / 0.06 pounds
28.8 g / 0.3 N
safe
15 mm 140 Gs
14.0 mT
0.00 kg / 0.01 pounds
4.6 g / 0.0 N
safe
20 mm 68 Gs
6.8 mT
0.00 kg / 0.00 pounds
1.1 g / 0.0 N
safe
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Vertical force (vertical surface)
MPL 10x10x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.62 kg / 1.37 pounds
620.0 g / 6.1 N
1 mm Stal (~0.2) 0.44 kg / 0.97 pounds
440.0 g / 4.3 N
2 mm Stal (~0.2) 0.28 kg / 0.62 pounds
282.0 g / 2.8 N
3 mm Stal (~0.2) 0.17 kg / 0.38 pounds
172.0 g / 1.7 N
5 mm Stal (~0.2) 0.06 kg / 0.13 pounds
60.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - 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 pounds
930.0 g / 9.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.62 kg / 1.37 pounds
620.0 g / 6.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.31 kg / 0.68 pounds
310.0 g / 3.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.55 kg / 3.42 pounds
1550.0 g / 15.2 N

Table 4: Steel thickness (saturation) - 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 pounds
310.0 g / 3.0 N
1 mm
25%
0.78 kg / 1.71 pounds
775.0 g / 7.6 N
2 mm
50%
1.55 kg / 3.42 pounds
1550.0 g / 15.2 N
3 mm
75%
2.33 kg / 5.13 pounds
2325.0 g / 22.8 N
5 mm
100%
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
10 mm
100%
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
11 mm
100%
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
12 mm
100%
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N

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

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
OK
40 °C -2.2% 3.03 kg / 6.68 pounds
3031.8 g / 29.7 N
OK
60 °C -4.4% 2.96 kg / 6.53 pounds
2963.6 g / 29.1 N
80 °C -6.6% 2.90 kg / 6.38 pounds
2895.4 g / 28.4 N
100 °C -28.8% 2.21 kg / 4.87 pounds
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 pounds
5 067 Gs
1.20 kg / 2.65 pounds
1203 g / 11.8 N
N/A
1 mm 6.85 kg / 15.11 pounds
6 667 Gs
1.03 kg / 2.27 pounds
1028 g / 10.1 N
6.17 kg / 13.59 pounds
~0 Gs
2 mm 5.68 kg / 12.52 pounds
6 070 Gs
0.85 kg / 1.88 pounds
852 g / 8.4 N
5.11 kg / 11.27 pounds
~0 Gs
3 mm 4.60 kg / 10.14 pounds
5 463 Gs
0.69 kg / 1.52 pounds
690 g / 6.8 N
4.14 kg / 9.13 pounds
~0 Gs
5 mm 2.87 kg / 6.32 pounds
4 313 Gs
0.43 kg / 0.95 pounds
430 g / 4.2 N
2.58 kg / 5.69 pounds
~0 Gs
10 mm 0.78 kg / 1.73 pounds
2 254 Gs
0.12 kg / 0.26 pounds
117 g / 1.2 N
0.70 kg / 1.55 pounds
~0 Gs
20 mm 0.07 kg / 0.16 pounds
695 Gs
0.01 kg / 0.02 pounds
11 g / 0.1 N
0.07 kg / 0.15 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
76 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
46 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
30 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
21 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
15 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
11 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
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
Mechanical watch 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: Collisions (cracking risk) - 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: Corrosion resistance
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: Construction 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: Physics of underwater searching
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Steel saturation

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

3. Temperature resistance

*For standard magnets, the critical limit 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.

Engineering data and GPSR
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
Magnet Unit Converter
Pulling force

Magnetic Field

Other proposals

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 10x10x4 mm and a weight of 3 g, guarantees premium class connection. As a magnetic bar with high power (approx. 3.10 kg), this product is available immediately from our warehouse in Poland. 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. 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 10x10x4 / 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. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 10x10x4 / N38, we recommend utilizing strong epoxy glues (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. Remember to roughen and wash 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 (10x10 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 10x10x4 mm, which, at a weight of 3 g, makes it an element with impressive energy density. 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 grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Apart from their notable holding force, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets are remarkably resistant to magnetic field loss caused by external magnetic fields,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to flexibility in shaping and the capacity to adapt to individual projects,
  • Key role in modern industrial fields – they find application in magnetic memories, electric drive systems, medical equipment, also technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their 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 start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of making nuts in the magnet and complex shapes - preferred is cover - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum magnetic pulling forcewhat it depends on?

The force parameter is a measurement result performed under standard conditions:
  • with the application of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with a surface perfectly flat
  • with direct contact (no impurities)
  • under vertical force direction (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Please note that the magnet holding may be lower depending on elements below, starting with the most relevant:
  • Distance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin plate does not close the flux, causing part of the power to be escaped into the air.
  • Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.

Warnings
Electronic hazard

Do not bring magnets close to a purse, computer, or TV. The magnetism can destroy these devices and erase data from cards.

Conscious usage

Handle magnets with awareness. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their power.

Medical interference

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

GPS Danger

Note: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.

Pinching danger

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

Keep away from children

Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep away from children and animals.

Do not drill into magnets

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease handling magnets and use protective gear.

Magnets are brittle

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

Demagnetization risk

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Warning! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98