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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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Technical - 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

Engineering simulation of the product - data

Presented information represent the outcome of a mathematical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a preliminary roadmap when designing systems.

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

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

Table 2: Shear force (vertical surface)
MPL 50x50x10 / N38

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

Table 3: Wall mounting (sliding) - vertical pull
MPL 50x50x10 / N38

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

Table 4: Material efficiency (substrate influence) - power losses
MPL 50x50x10 / N38

Steel thickness (mm) % power Real pull force (kg)
0.5 mm
5%
1.69 kg / 1686.5 g
16.5 N
1 mm
13%
4.22 kg / 4216.3 g
41.4 N
2 mm
25%
8.43 kg / 8432.5 g
82.7 N
5 mm
63%
21.08 kg / 21081.2 g
206.8 N
10 mm
100%
33.73 kg / 33730.0 g
330.9 N

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

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

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

Gap (mm) Attraction (kg) (N-S) Repulsion (kg) (N-N)
0 mm 67.80 kg / 67795 g
665.1 N
3 611 Gs
N/A
1 mm 66.54 kg / 66544 g
652.8 N
4 156 Gs
59.89 kg / 59889 g
587.5 N
~0 Gs
2 mm 65.18 kg / 65182 g
639.4 N
4 113 Gs
58.66 kg / 58664 g
575.5 N
~0 Gs
3 mm 63.74 kg / 63744 g
625.3 N
4 067 Gs
57.37 kg / 57369 g
562.8 N
~0 Gs
5 mm 60.67 kg / 60670 g
595.2 N
3 968 Gs
54.60 kg / 54603 g
535.7 N
~0 Gs
10 mm 52.24 kg / 52243 g
512.5 N
3 682 Gs
47.02 kg / 47019 g
461.3 N
~0 Gs
20 mm 35.33 kg / 35330 g
346.6 N
3 028 Gs
31.80 kg / 31797 g
311.9 N
~0 Gs
50 mm 7.69 kg / 7692 g
75.5 N
1 413 Gs
6.92 kg / 6923 g
67.9 N
~0 Gs

Table 7: Hazards (implants) - warnings
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
Timepiece 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 (cracking risk) - warning
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: Corrosion resistance
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: Construction data (Flux)
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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Caution: On a vertical surface, the magnet holds merely ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

*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.

Engineering data and GPSR
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: 020167-2025
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Force (pull)

Field Strength

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Model MPL 50x50x10 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 330.92 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 50x50x10 / 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 generators and material handling systems. Thanks to the flat surface and high force (approx. 33.73 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.
For mounting flat magnets MPL 50x50x10 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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 50x50x10 / N38 model is magnetized axially (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 protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of rare earth magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose power, even after approximately 10 years – the reduction in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets remain highly resistant to demagnetization caused by external interference,
  • In other words, due to the smooth surface of silver, the element becomes visually attractive,
  • The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
  • Possibility of precise machining and optimizing to individual conditions,
  • Huge importance in future technologies – they serve a role in hard drives, electromotive mechanisms, diagnostic systems, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their power 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 durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing threads and complicated forms in magnets, we propose using a housing - magnetic mount.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The declared magnet strength represents the maximum value, obtained under ideal test conditions, specifically:
  • on a block made of mild steel, perfectly concentrating the magnetic field
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • characterized by smoothness
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • at ambient temperature room level

Practical lifting capacity: influencing factors

In real-world applications, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Distance (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be wasted into the air.
  • Plate material – low-carbon steel gives the best results. Alloy steels lower magnetic permeability and lifting capacity.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets
Phone sensors

Note: neodymium magnets produce a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and GPS.

Do not overheat magnets

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Safe operation

Be careful. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can react.

Threat to electronics

Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

No play value

Always store magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Mechanical processing

Drilling and cutting of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Magnets are brittle

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Warning for heart patients

Warning for patients: Powerful magnets affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Serious injuries

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

Metal Allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for encased magnets.

Danger! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98