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MPL 50x20x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020165

GTIN/EAN: 5906301811718

5.00

length

50 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

75 g

Magnetization Direction

↑ axial

Load capacity

29.99 kg / 294.15 N

Magnetic Induction

337.18 mT / 3372 Gs

Coating

[NiCuNi] Nickel

43.05 with VAT / pcs + price for transport

35.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Detailed specification - MPL 50x20x10 / N38 - lamellar magnet

Specification / characteristics - MPL 50x20x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020165
GTIN/EAN 5906301811718
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 20 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 29.99 kg / 294.15 N
Magnetic Induction ~ ? 337.18 mT / 3372 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 50x20x10 / 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 magnet - technical parameters

These data are the result of a physical calculation. Values were calculated on models for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MPL 50x20x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3371 Gs
337.1 mT
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
dangerous!
1 mm 3158 Gs
315.8 mT
26.32 kg / 58.03 pounds
26323.3 g / 258.2 N
dangerous!
2 mm 2932 Gs
293.2 mT
22.69 kg / 50.02 pounds
22687.6 g / 222.6 N
dangerous!
3 mm 2703 Gs
270.3 mT
19.29 kg / 42.52 pounds
19286.7 g / 189.2 N
dangerous!
5 mm 2266 Gs
226.6 mT
13.55 kg / 29.86 pounds
13546.3 g / 132.9 N
dangerous!
10 mm 1419 Gs
141.9 mT
5.31 kg / 11.71 pounds
5313.0 g / 52.1 N
warning
15 mm 908 Gs
90.8 mT
2.17 kg / 4.79 pounds
2174.5 g / 21.3 N
warning
20 mm 603 Gs
60.3 mT
0.96 kg / 2.12 pounds
961.0 g / 9.4 N
weak grip
30 mm 296 Gs
29.6 mT
0.23 kg / 0.51 pounds
231.0 g / 2.3 N
weak grip
50 mm 97 Gs
9.7 mT
0.02 kg / 0.05 pounds
24.8 g / 0.2 N
weak grip

Table 2: Slippage load (wall)
MPL 50x20x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
1 mm Stal (~0.2) 5.26 kg / 11.61 pounds
5264.0 g / 51.6 N
2 mm Stal (~0.2) 4.54 kg / 10.00 pounds
4538.0 g / 44.5 N
3 mm Stal (~0.2) 3.86 kg / 8.51 pounds
3858.0 g / 37.8 N
5 mm Stal (~0.2) 2.71 kg / 5.97 pounds
2710.0 g / 26.6 N
10 mm Stal (~0.2) 1.06 kg / 2.34 pounds
1062.0 g / 10.4 N
15 mm Stal (~0.2) 0.43 kg / 0.96 pounds
434.0 g / 4.3 N
20 mm Stal (~0.2) 0.19 kg / 0.42 pounds
192.0 g / 1.9 N
30 mm Stal (~0.2) 0.05 kg / 0.10 pounds
46.0 g / 0.5 N
50 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MPL 50x20x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
9.00 kg / 19.83 pounds
8997.0 g / 88.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.00 kg / 6.61 pounds
2999.0 g / 29.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
15.00 kg / 33.06 pounds
14995.0 g / 147.1 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 50x20x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.50 kg / 3.31 pounds
1499.5 g / 14.7 N
1 mm
13%
3.75 kg / 8.26 pounds
3748.8 g / 36.8 N
2 mm
25%
7.50 kg / 16.53 pounds
7497.5 g / 73.6 N
3 mm
38%
11.25 kg / 24.79 pounds
11246.3 g / 110.3 N
5 mm
63%
18.74 kg / 41.32 pounds
18743.8 g / 183.9 N
10 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
11 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
12 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N

Table 5: Working in heat (material behavior) - power drop
MPL 50x20x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
OK
40 °C -2.2% 29.33 kg / 64.66 pounds
29330.2 g / 287.7 N
OK
60 °C -4.4% 28.67 kg / 63.21 pounds
28670.4 g / 281.3 N
80 °C -6.6% 28.01 kg / 61.75 pounds
28010.7 g / 274.8 N
100 °C -28.8% 21.35 kg / 47.07 pounds
21352.9 g / 209.5 N

Table 6: Two magnets (attraction) - field range
MPL 50x20x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 70.06 kg / 154.45 pounds
4 789 Gs
10.51 kg / 23.17 pounds
10509 g / 103.1 N
N/A
1 mm 65.83 kg / 145.13 pounds
6 535 Gs
9.87 kg / 21.77 pounds
9874 g / 96.9 N
59.25 kg / 130.61 pounds
~0 Gs
2 mm 61.49 kg / 135.57 pounds
6 316 Gs
9.22 kg / 20.34 pounds
9224 g / 90.5 N
55.34 kg / 122.01 pounds
~0 Gs
3 mm 57.20 kg / 126.10 pounds
6 092 Gs
8.58 kg / 18.92 pounds
8580 g / 84.2 N
51.48 kg / 113.49 pounds
~0 Gs
5 mm 48.94 kg / 107.89 pounds
5 635 Gs
7.34 kg / 16.18 pounds
7341 g / 72.0 N
44.05 kg / 97.10 pounds
~0 Gs
10 mm 31.64 kg / 69.76 pounds
4 531 Gs
4.75 kg / 10.46 pounds
4747 g / 46.6 N
28.48 kg / 62.79 pounds
~0 Gs
20 mm 12.41 kg / 27.36 pounds
2 838 Gs
1.86 kg / 4.10 pounds
1862 g / 18.3 N
11.17 kg / 24.63 pounds
~0 Gs
50 mm 1.07 kg / 2.35 pounds
832 Gs
0.16 kg / 0.35 pounds
160 g / 1.6 N
0.96 kg / 2.12 pounds
~0 Gs
60 mm 0.54 kg / 1.19 pounds
592 Gs
0.08 kg / 0.18 pounds
81 g / 0.8 N
0.49 kg / 1.07 pounds
~0 Gs
70 mm 0.29 kg / 0.64 pounds
433 Gs
0.04 kg / 0.10 pounds
43 g / 0.4 N
0.26 kg / 0.57 pounds
~0 Gs
80 mm 0.16 kg / 0.36 pounds
324 Gs
0.02 kg / 0.05 pounds
24 g / 0.2 N
0.15 kg / 0.32 pounds
~0 Gs
90 mm 0.10 kg / 0.21 pounds
248 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
0.09 kg / 0.19 pounds
~0 Gs
100 mm 0.06 kg / 0.13 pounds
194 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
0.05 kg / 0.11 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 50x20x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.5 cm
Hearing aid 10 Gs (1.0 mT) 12.0 cm
Mechanical watch 20 Gs (2.0 mT) 9.5 cm
Mobile device 40 Gs (4.0 mT) 7.5 cm
Remote 50 Gs (5.0 mT) 7.0 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MPL 50x20x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.29 km/h
(6.19 m/s)
1.44 J
30 mm 35.10 km/h
(9.75 m/s)
3.56 J
50 mm 45.12 km/h
(12.53 m/s)
5.89 J
100 mm 63.77 km/h
(17.72 m/s)
11.77 J

Table 9: Anti-corrosion coating durability
MPL 50x20x10 / 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 50x20x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 32 980 Mx 329.8 µWb
Pc Coefficient 0.38 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 50x20x10 / N38

Environment Effective steel pull Effect
Air (land) 29.99 kg Standard
Water (riverbed) 34.34 kg
(+4.35 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. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains merely a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.38

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
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%
Environmental data
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: 020165-2026
Measurement Calculator
Force (pull)

Field Strength

See also offers

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 50x20x10 mm and a weight of 75 g, guarantees premium class connection. This magnetic block with a force of 294.15 N is ready for shipment in 24h, allowing for rapid realization of your project. 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 50x20x10 / 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.
Plate magnets MPL 50x20x10 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners 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.
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 clean and degrease 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), 20 mm (width), and 10 mm (thickness). The key parameter here is the holding force amounting to approximately 29.99 kg (force ~294.15 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of neodymium magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose power, even over around 10 years – the decrease in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets are characterized by highly resistant to magnetic field loss caused by external field sources,
  • A magnet with a shiny gold surface has better aesthetics,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • 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 versatility in shaping and the capacity to adapt to individual projects,
  • Significant place in high-tech industry – they serve a role in hard drives, brushless drives, diagnostic systems, and other advanced devices.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing threads and complex forms in magnets, we recommend using casing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets can complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat affects it?

The declared magnet strength concerns the peak performance, obtained under laboratory conditions, namely:
  • on a base made of structural steel, optimally conducting the magnetic field
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • characterized by even structure
  • without the slightest air gap between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In practice, the actual lifting capacity depends on many variables, presented from most significant:
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer 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 significantly lower power (often approx. 20-30% of maximum force).
  • Plate thickness – too thin plate does not close the flux, causing part of the power to be lost to the other side.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface structure – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Operating temperature

Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Dust is flammable

Powder generated during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Electronic devices

Equipment safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, timepieces).

Nickel coating and allergies

It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands or opt for encased magnets.

Threat to navigation

A strong magnetic field disrupts the operation of compasses in phones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.

Medical interference

Warning for patients: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.

This is not a toy

Always keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.

Protective goggles

NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them breaking into shards.

Crushing risk

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

Handling guide

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Caution! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98