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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

bulk discounts:

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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

Engineering analysis of the assembly - report

Presented values represent the outcome of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - characteristics
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
warning
30 mm 543 Gs
54.3 mT
2.26 kg / 4.98 LBS
2260.0 g / 22.2 N
warning
50 mm 209 Gs
20.9 mT
0.33 kg / 0.74 LBS
334.1 g / 3.3 N
safe

Table 2: Shear force (wall)
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 (sliding) - 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 (material behavior) - resistance threshold
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 (repulsion) - field range
MPL 50x50x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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 (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
Phone / Smartphone 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: Coating parameters (durability)
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 (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: 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. Shear force

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 grade, 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
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%
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
Quick Unit Converter
Force (pull)

Magnetic Field

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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 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 50x50x10 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, 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. 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 50x50x10 / N38, it is best to use strong epoxy glues (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. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
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. 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.
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.

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external magnetic fields,
  • A magnet with a smooth nickel surface has better aesthetics,
  • The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in forming and the capacity to customize to client solutions,
  • Fundamental importance in high-tech industry – they serve a role in mass storage devices, brushless drives, medical devices, also other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Problematic aspects of neodymium magnets: tips and applications.
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Detachment force of the magnet in optimal conditionswhat contributes to it?

Breakaway force was determined for optimal configuration, taking into account:
  • on a plate made of structural steel, perfectly concentrating the magnetic field
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • without any air gap between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

Real force is affected by working environment parameters, such as (from priority):
  • Air gap (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Plate material – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Adults only

Strictly store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are life-threatening.

Fire risk

Powder generated during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

GPS Danger

Be aware: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, tablet, and GPS.

Protect data

Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Life threat

For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Bodily injuries

Large magnets can break fingers in a fraction of a second. Never place your hand between two strong magnets.

Power loss in heat

Control the heat. Heating the magnet to high heat will destroy its properties and strength.

Conscious usage

Be careful. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can move away.

Avoid contact if allergic

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and wear gloves.

Eye protection

Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.

Safety First! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98