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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

4.03 with VAT / pcs + price for transport

3.28 ZŁ net + 23% VAT / pcs

bulk discounts:

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Lifting power along with form of a magnet can be estimated using our our magnetic calculator.

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Technical data - 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

Technical modeling of the magnet - technical parameters

These information are the result of a mathematical calculation. Results were calculated on models for the material Nd2Fe14B. Actual performance may differ. Use these data as a reference point for designers.

Table 1: Static force (force vs distance) - characteristics
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
strong
1 mm 2873 Gs
287.3 mT
4.79 kg / 10.57 LBS
4794.1 g / 47.0 N
strong
2 mm 2528 Gs
252.8 mT
3.71 kg / 8.18 LBS
3712.5 g / 36.4 N
strong
3 mm 2181 Gs
218.1 mT
2.76 kg / 6.09 LBS
2763.0 g / 27.1 N
strong
5 mm 1565 Gs
156.5 mT
1.42 kg / 3.14 LBS
1422.0 g / 13.9 N
low risk
10 mm 659 Gs
65.9 mT
0.25 kg / 0.56 LBS
252.1 g / 2.5 N
low risk
15 mm 307 Gs
30.7 mT
0.05 kg / 0.12 LBS
54.7 g / 0.5 N
low risk
20 mm 162 Gs
16.2 mT
0.02 kg / 0.03 LBS
15.2 g / 0.1 N
low risk
30 mm 59 Gs
5.9 mT
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
low risk
50 mm 15 Gs
1.5 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
low risk

Table 2: Shear force (vertical surface)
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

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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

Table 4: Steel thickness (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

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

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 15x15x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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

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
Timepiece 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

Table 8: Dynamics (cracking risk) - collision effects
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

Table 9: Surface protection spec
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)

Table 10: Electrical data (Pc)
MPL 15x15x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 7 651 Mx 76.5 µWb
Pc Coefficient 0.40 Low (Flat)

Table 11: Submerged application
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%
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 wall, the magnet holds just approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) severely weakens the holding force.

3. Thermal stability

*For N38 material, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.40

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.

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
Magnet Unit Converter
Force (pull)

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Component MPL 15x15x5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. This magnetic block with a force of 57.62 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.
The key to success is sliding 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 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 15x15x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts 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.
For mounting flat magnets MPL 15x15x5 / N38, we recommend utilizing 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 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. In practice, this means that this magnet has the greatest attraction force on its main planes (15x15 mm), which is ideal for flat mounting. 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: 15 mm (length), 15 mm (width), and 5 mm (thickness). 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.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
  • Magnets effectively resist against loss of magnetization caused by foreign field sources,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • 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 precise machining as well as modifying to specific conditions,
  • Significant place in high-tech industry – they find application in HDD drives, electric motors, advanced medical instruments, as well as complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We suggest a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these products can be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Highest magnetic holding forcewhat affects it?

The force parameter is a result of laboratory testing conducted under the following configuration:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • whose thickness equals approx. 10 mm
  • with an ground contact surface
  • without the slightest clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Key elements affecting lifting force

Real force is affected by working environment parameters, mainly (from priority):
  • Gap (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Safe handling of NdFeB magnets
Swallowing risk

Neodymium magnets are not suitable for play. Swallowing multiple magnets can lead to them pinching intestinal walls, which poses a severe health hazard and requires urgent medical intervention.

Respect the power

Be careful. Neodymium magnets act from a long distance and snap with massive power, often quicker than you can react.

Electronic devices

Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Implant safety

For implant holders: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to handle the magnets.

Metal Allergy

Studies show that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select versions in plastic housing.

Physical harm

Watch your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Magnets are brittle

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Magnetic interference

Be aware: rare earth magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, device, and navigation systems.

Heat sensitivity

Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Mechanical processing

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Important! 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