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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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Product card - 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

Physical simulation of the magnet - report

These data constitute the direct effect of a mathematical calculation. Results are based on algorithms for the material Nd2Fe14B. Real-world performance may differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force 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
dangerous!
1 mm 2056 Gs
205.6 mT
32.43 kg / 71.50 lbs
32430.0 g / 318.1 N
dangerous!
2 mm 2009 Gs
200.9 mT
30.96 kg / 68.27 lbs
30964.6 g / 303.8 N
dangerous!
3 mm 1957 Gs
195.7 mT
29.38 kg / 64.77 lbs
29380.4 g / 288.2 N
dangerous!
5 mm 1841 Gs
184.1 mT
25.99 kg / 57.30 lbs
25992.3 g / 255.0 N
dangerous!
10 mm 1514 Gs
151.4 mT
17.58 kg / 38.75 lbs
17577.6 g / 172.4 N
dangerous!
15 mm 1194 Gs
119.4 mT
10.93 kg / 24.10 lbs
10931.8 g / 107.2 N
dangerous!
20 mm 922 Gs
92.2 mT
6.51 kg / 14.36 lbs
6512.2 g / 63.9 N
medium risk
30 mm 543 Gs
54.3 mT
2.26 kg / 4.98 lbs
2260.0 g / 22.2 N
medium risk
50 mm 209 Gs
20.9 mT
0.33 kg / 0.74 lbs
334.1 g / 3.3 N
weak grip

Table 2: Sliding capacity (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) - vertical pull
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 (substrate influence) - sheet metal selection
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: Thermal stability (stability) - power drop
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: Two magnets (repulsion) - forces in the system
MPL 50x50x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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: Protective zones (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
Car key 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: Dynamics (kinetic energy) - 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: 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: Construction 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: Physics of underwater searching
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains merely a fraction of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*For standard magnets, the safety 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 and environmental data
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: 020167-2026
Magnet Unit Converter
Force (pull)

Magnetic Field

Other offers

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. 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. Watch your fingers! Magnets with a force of 33.73 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 50x50x10 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. 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. 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 50 mm (length), 50 mm (width), and 10 mm (thickness). 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 as well as weaknesses of rare earth magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • They retain their magnetic properties even under close interference source,
  • In other words, due to the smooth finish of silver, the element is aesthetically pleasing,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in forming and the ability to customize to client solutions,
  • Wide application in modern technologies – they serve a role in hard drives, electromotive mechanisms, medical equipment, also modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating threads in the magnet and complex shapes - recommended is a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Highest magnetic holding forcewhat affects it?

The lifting capacity listed is a theoretical maximum value executed under specific, ideal conditions:
  • with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • with a cross-section no less than 10 mm
  • with an ideally smooth touching surface
  • under conditions of gap-free contact (surface-to-surface)
  • under perpendicular application of breakaway force (90-degree angle)
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

Bear in mind that the application force may be lower depending on elements below, in order of importance:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Steel thickness – too thin steel does not close the flux, causing part of the flux to be escaped into the air.
  • Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets
Flammability

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Maximum temperature

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Crushing force

Big blocks can smash fingers instantly. Never put your hand between two attracting surfaces.

Do not give to children

Neodymium magnets are not suitable for play. Eating a few magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

Fragile material

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Danger to pacemakers

People with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the functioning of the life-saving device.

GPS Danger

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, device, and GPS.

Powerful field

Handle magnets consciously. Their immense force can shock even experienced users. Plan your moves and respect their power.

Avoid contact if allergic

Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, immediately stop working with magnets and wear gloves.

Magnetic media

Do not bring magnets close to a wallet, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Attention! Learn more 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