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MPL 15x15x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020120

GTIN/EAN: 5906301811268

5.00

length

15 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

8.44 g

Magnetization Direction

↑ axial

Load capacity

5.87 kg / 57.62 N

Magnetic Induction

318.00 mT / 3180 Gs

Coating

[NiCuNi] Nickel

view properties »

4.03 ZŁ with VAT / pcs + price for transport

3.28 ZŁ net + 23% VAT / pcs

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Technical - MPL 15x15x5 / N38 - lamellar magnet

Specification / characteristics - MPL 15x15x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020120
GTIN/EAN 5906301811268
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 15 mm [±0,1 mm]
Width 15 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 8.44 g
Magnetization Direction ↑ axial
Load capacity ~ ? 5.87 kg / 57.62 N
Magnetic Induction ~ ? 318.00 mT / 3180 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x15x5 / 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 modeling of the magnet - report

Presented information represent the result of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Operational performance might slightly differ. Treat these data as a reference point for designers.

Table 1: Static pull force (force vs distance) - power drop
MPL 15x15x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3179 Gs
317.9 mT
 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
 medium risk
1 mm 2873 Gs
287.3 mT
 4.79 kg / 10.57 lbs
4794.1 g / 47.0 N
 medium risk
2 mm 2528 Gs
252.8 mT
 3.71 kg / 8.18 lbs
3712.5 g / 36.4 N
 medium risk
3 mm 2181 Gs
218.1 mT
 2.76 kg / 6.09 lbs
2763.0 g / 27.1 N
 medium risk
5 mm 1565 Gs
156.5 mT
 1.42 kg / 3.14 lbs
1422.0 g / 13.9 N
 safe
10 mm 659 Gs
65.9 mT
 0.25 kg / 0.56 lbs
252.1 g / 2.5 N
 safe
15 mm 307 Gs
30.7 mT
 0.05 kg / 0.12 lbs
54.7 g / 0.5 N
 safe
20 mm 162 Gs
16.2 mT
 0.02 kg / 0.03 lbs
15.2 g / 0.1 N
 safe
30 mm 59 Gs
5.9 mT
 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
 safe
50 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 safe
Pulling power weakens significantly with every mm of distance. Note that even a microscopic distance (e.g., dirt, varnish, dust) noticeably weakens the grip. Neodymiums work optimally at the point of direct contact; air break nullifies the force. Observe how quickly the pull force drop, when the product does not touch flatly to the steel surface. When planning the mounting, avoid redundant distances.

Table 2: Slippage capacity (wall)
MPL 15x15x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.17 kg / 2.59 lbs
1174.0 g / 11.5 N
1 mm Stal (~0.2) 0.96 kg / 2.11 lbs
958.0 g / 9.4 N
2 mm Stal (~0.2) 0.74 kg / 1.64 lbs
742.0 g / 7.3 N
3 mm Stal (~0.2) 0.55 kg / 1.22 lbs
552.0 g / 5.4 N
5 mm Stal (~0.2) 0.28 kg / 0.63 lbs
284.0 g / 2.8 N
10 mm Stal (~0.2) 0.05 kg / 0.11 lbs
50.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
This section calculates the theoretical holding capacity needed to cause the sliding of the magnet vertically along a upright metal surface (considering standard friction). This parameter is relative to the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MPL 15x15x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.76 kg / 3.88 lbs
1761.0 g / 17.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.17 kg / 2.59 lbs
1174.0 g / 11.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.59 kg / 1.29 lbs
587.0 g / 5.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.94 kg / 6.47 lbs
2935.0 g / 28.8 N
When mounting a holder on a vertical wall (e.g., a board), it will maintain barely about 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that magnets slip faster than they pull off. Want to create a vertical fastening? Remember that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will slip down under a significantly smaller load. Utilizing a rubberized layer can drastically raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MPL 15x15x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.59 kg / 1.29 lbs
587.0 g / 5.8 N
1 mm
25%
 1.47 kg / 3.24 lbs
1467.5 g / 14.4 N
2 mm
50%
 2.94 kg / 6.47 lbs
2935.0 g / 28.8 N
3 mm
75%
 4.40 kg / 9.71 lbs
4402.5 g / 43.2 N
5 mm
100%
 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
10 mm
100%
 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
11 mm
100%
 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
12 mm
100%
 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
A too thin steel cannot focus the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a thin surface, the field will pass right through and the pull force will drop sharply. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation phenomenon causes that on delicate walls (e.g., thin profiles), the magnet works worse. We advise picking the steel dimension based on the following data.

Table 5: Working in heat (material behavior) - power drop
MPL 15x15x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 5.87 kg / 12.94 lbs
5870.0 g / 57.6 N
 OK
40 °C -2.2% 5.74 kg / 12.66 lbs
5740.9 g / 56.3 N
 OK
60 °C -4.4% 5.61 kg / 12.37 lbs
5611.7 g / 55.1 N
80 °C -6.6% 5.48 kg / 12.09 lbs
5482.6 g / 53.8 N
100 °C -28.8% 4.18 kg / 9.21 lbs
4179.4 g / 41.0 N
Ordinary NdFeB products change their properties power after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly demagnetize this magnet. With increasing heat, the magnet's power momentarily lowers. Do not use this product close to ovens higher than its safe range. Exceeding the critical threshold will cause permanent loss of magnetism.
*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 15x15x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 14.02 kg / 30.90 lbs
4 741 Gs
2.10 kg / 4.64 lbs
2103 g / 20.6 N
 N/A
1 mm 12.77 kg / 28.15 lbs
6 068 Gs
1.92 kg / 4.22 lbs
1916 g / 18.8 N
 11.49 kg / 25.34 lbs
~0 Gs
2 mm 11.45 kg / 25.24 lbs
5 746 Gs
1.72 kg / 3.79 lbs
1717 g / 16.8 N
 10.30 kg / 22.72 lbs
~0 Gs
3 mm 10.13 kg / 22.34 lbs
5 405 Gs
1.52 kg / 3.35 lbs
1520 g / 14.9 N
 9.12 kg / 20.10 lbs
~0 Gs
5 mm 7.68 kg / 16.93 lbs
4 706 Gs
1.15 kg / 2.54 lbs
1152 g / 11.3 N
 6.91 kg / 15.24 lbs
~0 Gs
10 mm 3.40 kg / 7.49 lbs
3 129 Gs
0.51 kg / 1.12 lbs
509 g / 5.0 N
 3.06 kg / 6.74 lbs
~0 Gs
20 mm 0.60 kg / 1.33 lbs
1 318 Gs
0.09 kg / 0.20 lbs
90 g / 0.9 N
 0.54 kg / 1.19 lbs
~0 Gs
50 mm 0.01 kg / 0.03 lbs
188 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
118 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
79 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
55 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
40 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
30 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two strong neodymiums interact from a much further distance than a magnet and sheet combination. The setup of two magnets generates a stronger field and a larger range of action. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the collision energy is extreme. The levitation is slightly lower than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
* Figures show sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MPL 15x15x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.5 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Mobile device 40 Gs (4.0 mT) 3.5 cm
Car key 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
Powerful magnet radiation is a serious hazard to IT equipment and medical implants. These NdFeB products generate a field that prevents correct functioning of digital equipment. Remember: the invisible magnetic field passes through tissues and glass. Special caution must be taken by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MPL 15x15x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.30 km/h
(7.58 m/s)
 0.24 J
30 mm 46.08 km/h
(12.80 m/s)
 0.69 J
50 mm 59.47 km/h
(16.52 m/s)
 1.15 J
100 mm 84.11 km/h
(23.36 m/s)
 2.30 J
Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear safety glasses when playing with powerful specimens.

Table 9: Corrosion resistance
MPL 15x15x5 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MPL 15x15x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 7 651 Mx 76.5 µWb
Pc Coefficient 0.40 Low (Flat)
Total magnetic flux passing through the magnet pole. Key data in coil applications and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 15x15x5 / N38

Environment Effective steel pull Effect
Air (land) 5.87 kg Standard
Water (riverbed) 6.72 kg
(+0.85 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.
1. Shear force

*Caution: On a vertical wall, the magnet holds merely approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely reduces 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) = 0.40

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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
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: 020120-2026
Measurement Calculator
Pulling force
Field Strength
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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 15x15x5 mm and a weight of 8.44 g, guarantees the highest quality connection. As a block magnet with high power (approx. 5.87 kg), this product is available immediately from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 15x15x5 / 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 15x15x5 / 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 workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 15x15x5 / N38, it is best to use 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. 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.
This model is characterized by dimensions 15x15x5 mm, which, at a weight of 8.44 g, makes it an element with impressive energy density. The key parameter here is the lifting capacity amounting to approximately 5.87 kg (force ~57.62 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of neodymium magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have stable power, and over around ten years their performance decreases symbolically – ~1% (according to theory),
  • They have excellent resistance to magnetic field loss as a result of opposing magnetic fields,
  • In other words, due to the aesthetic layer of gold, the element gains a professional look,
  • Magnetic induction on the top side of the magnet turns out to be maximum,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
  • Thanks to versatility in shaping and the ability to adapt to complex applications,
  • Key role in modern industrial fields – they are utilized in computer drives, electric motors, precision medical tools, and complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets and proposals for their use:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience 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 corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend casing - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

Information about lifting capacity was defined for optimal configuration, assuming:
  • on a block made of mild steel, effectively closing the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • under axial force direction (90-degree angle)
  • in temp. approx. 20°C

Key elements affecting lifting force

Real force is affected by working environment parameters, mainly (from priority):
  • Distance – existence of any layer (paint, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
GPS Danger

Remember: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your phone, tablet, and navigation systems.

Beware of splinters

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Medical implants

Individuals with a heart stimulator should maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Do not overheat magnets

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

Threat to electronics

Do not bring magnets close to a purse, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Fire risk

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

Hand protection

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Danger to the youngest

Neodymium magnets are not intended for children. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Respect the power

Exercise caution. Rare earth magnets attract from a distance and connect with huge force, often faster than you can move away.

Nickel allergy

It is widely known that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, refrain from direct skin contact and select encased magnets.

Important! More info about risks in the article: Magnet Safety Guide.