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MPL 50x50x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020167

GTIN/EAN: 5906301811732

5.00

length

50 mm [±0,1 mm]

Width

50 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

187.5 g

Magnetization Direction

↑ axial

Load capacity

33.73 kg / 330.92 N

Magnetic Induction

209.75 mT / 2097 Gs

Coating

[NiCuNi] Nickel

42.88 with VAT / pcs + price for transport

34.86 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 50x50x10 / N38 - lamellar magnet

Specification / characteristics - MPL 50x50x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020167
GTIN/EAN 5906301811732
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 50 mm [±0,1 mm]
Width 50 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 187.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 33.73 kg / 330.92 N
Magnetic Induction ~ ? 209.75 mT / 2097 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 50x50x10 / 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 assembly - technical parameters

The following information constitute the outcome of a physical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Use these data as a reference point during assembly planning.

Table 1: Static force (pull vs distance) - power drop
MPL 50x50x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2097 Gs
209.7 mT
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
critical level
1 mm 2056 Gs
205.6 mT
32.43 kg / 71.50 LBS
32430.0 g / 318.1 N
critical level
2 mm 2009 Gs
200.9 mT
30.96 kg / 68.27 LBS
30964.6 g / 303.8 N
critical level
3 mm 1957 Gs
195.7 mT
29.38 kg / 64.77 LBS
29380.4 g / 288.2 N
critical level
5 mm 1841 Gs
184.1 mT
25.99 kg / 57.30 LBS
25992.3 g / 255.0 N
critical level
10 mm 1514 Gs
151.4 mT
17.58 kg / 38.75 LBS
17577.6 g / 172.4 N
critical level
15 mm 1194 Gs
119.4 mT
10.93 kg / 24.10 LBS
10931.8 g / 107.2 N
critical level
20 mm 922 Gs
92.2 mT
6.51 kg / 14.36 LBS
6512.2 g / 63.9 N
strong
30 mm 543 Gs
54.3 mT
2.26 kg / 4.98 LBS
2260.0 g / 22.2 N
strong
50 mm 209 Gs
20.9 mT
0.33 kg / 0.74 LBS
334.1 g / 3.3 N
low risk

Table 2: Sliding hold (vertical surface)
MPL 50x50x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.75 kg / 14.87 LBS
6746.0 g / 66.2 N
1 mm Stal (~0.2) 6.49 kg / 14.30 LBS
6486.0 g / 63.6 N
2 mm Stal (~0.2) 6.19 kg / 13.65 LBS
6192.0 g / 60.7 N
3 mm Stal (~0.2) 5.88 kg / 12.95 LBS
5876.0 g / 57.6 N
5 mm Stal (~0.2) 5.20 kg / 11.46 LBS
5198.0 g / 51.0 N
10 mm Stal (~0.2) 3.52 kg / 7.75 LBS
3516.0 g / 34.5 N
15 mm Stal (~0.2) 2.19 kg / 4.82 LBS
2186.0 g / 21.4 N
20 mm Stal (~0.2) 1.30 kg / 2.87 LBS
1302.0 g / 12.8 N
30 mm Stal (~0.2) 0.45 kg / 1.00 LBS
452.0 g / 4.4 N
50 mm Stal (~0.2) 0.07 kg / 0.15 LBS
66.0 g / 0.6 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 50x50x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
10.12 kg / 22.31 LBS
10119.0 g / 99.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.75 kg / 14.87 LBS
6746.0 g / 66.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.37 kg / 7.44 LBS
3373.0 g / 33.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.87 kg / 37.18 LBS
16865.0 g / 165.4 N

Table 4: Steel thickness (saturation) - power losses
MPL 50x50x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.69 kg / 3.72 LBS
1686.5 g / 16.5 N
1 mm
13%
4.22 kg / 9.30 LBS
4216.3 g / 41.4 N
2 mm
25%
8.43 kg / 18.59 LBS
8432.5 g / 82.7 N
3 mm
38%
12.65 kg / 27.89 LBS
12648.8 g / 124.1 N
5 mm
63%
21.08 kg / 46.48 LBS
21081.2 g / 206.8 N
10 mm
100%
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
11 mm
100%
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
12 mm
100%
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N

Table 5: Working in heat (material behavior) - thermal limit
MPL 50x50x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
OK
40 °C -2.2% 32.99 kg / 72.73 LBS
32987.9 g / 323.6 N
OK
60 °C -4.4% 32.25 kg / 71.09 LBS
32245.9 g / 316.3 N
80 °C -6.6% 31.50 kg / 69.45 LBS
31503.8 g / 309.1 N
100 °C -28.8% 24.02 kg / 52.95 LBS
24015.8 g / 235.6 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 50x50x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 67.80 kg / 149.46 LBS
3 611 Gs
10.17 kg / 22.42 LBS
10169 g / 99.8 N
N/A
1 mm 66.54 kg / 146.70 LBS
4 156 Gs
9.98 kg / 22.01 LBS
9982 g / 97.9 N
59.89 kg / 132.03 LBS
~0 Gs
2 mm 65.18 kg / 143.70 LBS
4 113 Gs
9.78 kg / 21.56 LBS
9777 g / 95.9 N
58.66 kg / 129.33 LBS
~0 Gs
3 mm 63.74 kg / 140.53 LBS
4 067 Gs
9.56 kg / 21.08 LBS
9562 g / 93.8 N
57.37 kg / 126.48 LBS
~0 Gs
5 mm 60.67 kg / 133.75 LBS
3 968 Gs
9.10 kg / 20.06 LBS
9101 g / 89.3 N
54.60 kg / 120.38 LBS
~0 Gs
10 mm 52.24 kg / 115.18 LBS
3 682 Gs
7.84 kg / 17.28 LBS
7836 g / 76.9 N
47.02 kg / 103.66 LBS
~0 Gs
20 mm 35.33 kg / 77.89 LBS
3 028 Gs
5.30 kg / 11.68 LBS
5299 g / 52.0 N
31.80 kg / 70.10 LBS
~0 Gs
50 mm 7.69 kg / 16.96 LBS
1 413 Gs
1.15 kg / 2.54 LBS
1154 g / 11.3 N
6.92 kg / 15.26 LBS
~0 Gs
60 mm 4.54 kg / 10.01 LBS
1 086 Gs
0.68 kg / 1.50 LBS
681 g / 6.7 N
4.09 kg / 9.01 LBS
~0 Gs
70 mm 2.72 kg / 6.01 LBS
841 Gs
0.41 kg / 0.90 LBS
409 g / 4.0 N
2.45 kg / 5.41 LBS
~0 Gs
80 mm 1.67 kg / 3.68 LBS
658 Gs
0.25 kg / 0.55 LBS
250 g / 2.5 N
1.50 kg / 3.31 LBS
~0 Gs
90 mm 1.05 kg / 2.31 LBS
521 Gs
0.16 kg / 0.35 LBS
157 g / 1.5 N
0.94 kg / 2.08 LBS
~0 Gs
100 mm 0.67 kg / 1.48 LBS
417 Gs
0.10 kg / 0.22 LBS
101 g / 1.0 N
0.60 kg / 1.33 LBS
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MPL 50x50x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 21.0 cm
Hearing aid 10 Gs (1.0 mT) 16.5 cm
Mechanical watch 20 Gs (2.0 mT) 13.0 cm
Mobile device 40 Gs (4.0 mT) 10.0 cm
Remote 50 Gs (5.0 mT) 9.5 cm
Payment card 400 Gs (40.0 mT) 4.0 cm
HDD hard drive 600 Gs (60.0 mT) 3.0 cm

Table 8: Collisions (kinetic energy) - collision effects
MPL 50x50x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.38 km/h
(4.83 m/s)
2.19 J
30 mm 24.39 km/h
(6.78 m/s)
4.30 J
50 mm 30.43 km/h
(8.45 m/s)
6.70 J
100 mm 42.78 km/h
(11.88 m/s)
13.24 J

Table 9: Surface protection spec
MPL 50x50x10 / 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 (Pc)
MPL 50x50x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 61 501 Mx 615.0 µWb
Pc Coefficient 0.26 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 50x50x10 / N38

Environment Effective steel pull Effect
Air (land) 33.73 kg Standard
Water (riverbed) 38.62 kg
(+4.89 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

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*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) = 0.26

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 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: 020167-2026
Magnet Unit Converter
Force (pull)

Magnetic Field

View also proposals

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 50x50x10 mm and a weight of 187.5 g, guarantees the highest quality connection. As a block magnet with high power (approx. 33.73 kg), this product is available off-the-shelf 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 strong flat 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 33.73 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.
They constitute a key element in the production of generators and material handling systems. They work great as invisible mounts under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
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).
Standardly, the MPL 50x50x10 / N38 model is magnetized through the thickness (dimension 10 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (50x50 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.
This model is characterized by dimensions 50x50x10 mm, which, at a weight of 187.5 g, makes it an element with high energy density. It is a magnetic block with dimensions 50x50x10 mm and a self-weight of 187.5 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They possess excellent resistance to magnetism drop due to opposing magnetic fields,
  • By covering with a smooth layer of silver, the element presents an elegant look,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in constructing and the ability to customize to complex applications,
  • Fundamental importance in modern industrial fields – they are used in data components, brushless drives, medical equipment, as well as multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic mount.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat affects it?

Holding force of 33.73 kg is a result of laboratory testing executed under specific, ideal conditions:
  • with the use of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose thickness is min. 10 mm
  • with an ideally smooth touching surface
  • under conditions of no distance (surface-to-surface)
  • under axial application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Holding efficiency is influenced by specific conditions, such as (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets
Hand protection

Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Fragile material

Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Precision electronics

A strong magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Powerful field

Use magnets consciously. Their huge power can shock even professionals. Plan your moves and do not underestimate their force.

Life threat

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Fire risk

Machining of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Avoid contact if allergic

Studies show that the nickel plating (the usual finish) is a common allergen. For allergy sufferers, avoid touching magnets with bare hands or opt for encased magnets.

Do not overheat magnets

Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.

Choking Hazard

These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them pinching intestinal walls, which poses a critical condition and requires urgent medical intervention.

Safe distance

Data protection: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Attention! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98