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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

check parameters »

42.88 ZŁ with VAT / pcs + price for transport

34.86 ZŁ net + 23% VAT / pcs

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Detailed specification - 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 modeling of the product - data

Presented information are the result of a physical analysis. Results rely on algorithms for the class Nd2Fe14B. Operational performance might slightly differ. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - 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 pounds
33730.0 g / 330.9 N
 critical level
1 mm 2056 Gs
205.6 mT
 32.43 kg / 71.50 pounds
32430.0 g / 318.1 N
 critical level
2 mm 2009 Gs
200.9 mT
 30.96 kg / 68.27 pounds
30964.6 g / 303.8 N
 critical level
3 mm 1957 Gs
195.7 mT
 29.38 kg / 64.77 pounds
29380.4 g / 288.2 N
 critical level
5 mm 1841 Gs
184.1 mT
 25.99 kg / 57.30 pounds
25992.3 g / 255.0 N
 critical level
10 mm 1514 Gs
151.4 mT
 17.58 kg / 38.75 pounds
17577.6 g / 172.4 N
 critical level
15 mm 1194 Gs
119.4 mT
 10.93 kg / 24.10 pounds
10931.8 g / 107.2 N
 critical level
20 mm 922 Gs
92.2 mT
 6.51 kg / 14.36 pounds
6512.2 g / 63.9 N
 strong
30 mm 543 Gs
54.3 mT
 2.26 kg / 4.98 pounds
2260.0 g / 22.2 N
 strong
50 mm 209 Gs
20.9 mT
 0.33 kg / 0.74 pounds
334.1 g / 3.3 N
 weak grip
Pulling power weakens significantly with every mm of gap. Remember that even the smallest gap (e.g., dirt, paint, veneer) strongly weakens the grip. Neodymiums operate strongest in perfect adhesion; air break kills the power. Observe how flashily the pull force fall, when the product does not touch flatly to the steel surface. When planning the assembly, avoid unnecessary gaps.

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 pounds
6746.0 g / 66.2 N
1 mm Stal (~0.2) 6.49 kg / 14.30 pounds
6486.0 g / 63.6 N
2 mm Stal (~0.2) 6.19 kg / 13.65 pounds
6192.0 g / 60.7 N
3 mm Stal (~0.2) 5.88 kg / 12.95 pounds
5876.0 g / 57.6 N
5 mm Stal (~0.2) 5.20 kg / 11.46 pounds
5198.0 g / 51.0 N
10 mm Stal (~0.2) 3.52 kg / 7.75 pounds
3516.0 g / 34.5 N
15 mm Stal (~0.2) 2.19 kg / 4.82 pounds
2186.0 g / 21.4 N
20 mm Stal (~0.2) 1.30 kg / 2.87 pounds
1302.0 g / 12.8 N
30 mm Stal (~0.2) 0.45 kg / 1.00 pounds
452.0 g / 4.4 N
50 mm Stal (~0.2) 0.07 kg / 0.15 pounds
66.0 g / 0.6 N
The following data presents the approximate weight limit sufficient to cause the shifting of the magnet down on a upright steel wall (assuming standard friction). This parameter depends on the gap size between the magnet and the surface.

Table 3: Wall mounting (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 pounds
10119.0 g / 99.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.75 kg / 14.87 pounds
6746.0 g / 66.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.37 kg / 7.44 pounds
3373.0 g / 33.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.87 kg / 37.18 pounds
16865.0 g / 165.4 N
When placing a holder on a upright wall (e.g., a car body), it you can count on only about 20%-30% of its nominal power. Gravity as well as a weak degree of grip influence the fact that products move down easier than they pop off the substrate. Planning a vertical fastening? Remember that the shear force is significantly lower than the maximum static pull force. On a painted metal, the element will slip down under a noticeably lighter weight. Utilizing a rubberized pad can significantly raise the stability.

Table 4: Material efficiency (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 pounds
1686.5 g / 16.5 N
1 mm
13%
 4.22 kg / 9.30 pounds
4216.3 g / 41.4 N
2 mm
25%
 8.43 kg / 18.59 pounds
8432.5 g / 82.7 N
3 mm
38%
 12.65 kg / 27.89 pounds
12648.8 g / 124.1 N
5 mm
63%
 21.08 kg / 46.48 pounds
21081.2 g / 206.8 N
10 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
11 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
12 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
A too thin steel is incapable of conduct the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To achieve 100% of this neodymium's power, you need a suitably thick piece of metal. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet works worse. We suggest choosing the steel cross-section based on the following data.

Table 5: Working in heat (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 pounds
33730.0 g / 330.9 N
 OK
40 °C -2.2% 32.99 kg / 72.73 pounds
32987.9 g / 323.6 N
 OK
60 °C -4.4% 32.25 kg / 71.09 pounds
32245.9 g / 316.3 N
80 °C -6.6% 31.50 kg / 69.45 pounds
31503.8 g / 309.1 N
100 °C -28.8% 24.02 kg / 52.95 pounds
24015.8 g / 235.6 N
Standard neodymium magnets irreversibly lose parameters after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly destroy this magnet. As the temperature rises, the magnet's capacity briefly decreases. Avoid using this magnet near heat sources higher than its working range. Ignoring the limit will cause irreversible degradation of magnetism.
*Important note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) are more susceptible to demagnetization at lower temperatures than long magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - 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 pounds
3 611 Gs
10.17 kg / 22.42 pounds
10169 g / 99.8 N
 N/A
1 mm 66.54 kg / 146.70 pounds
4 156 Gs
9.98 kg / 22.01 pounds
9982 g / 97.9 N
 59.89 kg / 132.03 pounds
~0 Gs
2 mm 65.18 kg / 143.70 pounds
4 113 Gs
9.78 kg / 21.56 pounds
9777 g / 95.9 N
 58.66 kg / 129.33 pounds
~0 Gs
3 mm 63.74 kg / 140.53 pounds
4 067 Gs
9.56 kg / 21.08 pounds
9562 g / 93.8 N
 57.37 kg / 126.48 pounds
~0 Gs
5 mm 60.67 kg / 133.75 pounds
3 968 Gs
9.10 kg / 20.06 pounds
9101 g / 89.3 N
 54.60 kg / 120.38 pounds
~0 Gs
10 mm 52.24 kg / 115.18 pounds
3 682 Gs
7.84 kg / 17.28 pounds
7836 g / 76.9 N
 47.02 kg / 103.66 pounds
~0 Gs
20 mm 35.33 kg / 77.89 pounds
3 028 Gs
5.30 kg / 11.68 pounds
5299 g / 52.0 N
 31.80 kg / 70.10 pounds
~0 Gs
50 mm 7.69 kg / 16.96 pounds
1 413 Gs
1.15 kg / 2.54 pounds
1154 g / 11.3 N
 6.92 kg / 15.26 pounds
~0 Gs
60 mm 4.54 kg / 10.01 pounds
1 086 Gs
0.68 kg / 1.50 pounds
681 g / 6.7 N
 4.09 kg / 9.01 pounds
~0 Gs
70 mm 2.72 kg / 6.01 pounds
841 Gs
0.41 kg / 0.90 pounds
409 g / 4.0 N
 2.45 kg / 5.41 pounds
~0 Gs
80 mm 1.67 kg / 3.68 pounds
658 Gs
0.25 kg / 0.55 pounds
250 g / 2.5 N
 1.50 kg / 3.31 pounds
~0 Gs
90 mm 1.05 kg / 2.31 pounds
521 Gs
0.16 kg / 0.35 pounds
157 g / 1.5 N
 0.94 kg / 2.08 pounds
~0 Gs
100 mm 0.67 kg / 1.48 pounds
417 Gs
0.10 kg / 0.22 pounds
101 g / 1.0 N
 0.60 kg / 1.33 pounds
~0 Gs
Two strong neodymiums interact from a much further distance than a magnet and steel setup. Such a system of two magnets produces a massive flux and a further horizon of operation. Designing a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Remember that when connecting a pair of magnets, the pinch force is huge. The repulsion force is slightly lower than the attraction, but still impressive.
*Field value for N-N configuration is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Figures demonstrate sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

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
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
A strong magnetic field is a real danger to IT equipment as well as pacemakers. These NdFeB products produce a field that destroys function of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

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
NdFeB products are delicate – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the steel surface. A collision at high speed means shattering of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Anti-corrosion coating 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

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)
Flux value passing through the pole surface. Key data in coil applications as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

*Note: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.

3. Temperature resistance

*For N38 material, 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 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%
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
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Component MPL 50x50x10 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. 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. 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.
Plate magnets MPL 50x50x10 / N38 are the foundation for many industrial devices, such as magnetic separators 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. 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 axially (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.
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.

Pros and cons of neodymium magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets very well protect themselves against demagnetization caused by external fields,
  • By using a lustrous coating of nickel, the element acquires an aesthetic look,
  • Magnetic induction on the working layer of the magnet turns out to be strong,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of exact creating as well as adjusting to precise applications,
  • Wide application in electronics industry – they find application in magnetic memories, electric motors, advanced medical instruments, also complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum lifting force for a neodymium magnet – what it depends on?

The specified lifting capacity represents the maximum value, recorded under optimal environment, namely:
  • using a plate made of mild steel, acting as a ideal flux conductor
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • with total lack of distance (without impurities)
  • for force applied at a right angle (in the magnet axis)
  • in neutral thermal conditions

Determinants of lifting force in real conditions

It is worth knowing that the magnet holding will differ influenced by the following factors, starting with the most relevant:
  • Air gap (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Steel thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped to the other side.
  • Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface quality – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Implant safety

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

Permanent damage

Keep cool. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Caution required

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

Adults only

Only for adults. Tiny parts can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Data carriers

Data protection: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Magnetic interference

A strong magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Serious injuries

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Nickel coating and allergies

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease working with magnets and use protective gear.

Dust explosion hazard

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Shattering risk

Watch out for shards. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?