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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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Technical of the product - 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 simulation of the magnet - data

Presented data represent the result of a physical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world performance might slightly differ. Treat these calculations as a reference point for designers.

Table 1: Static force (pull vs gap) - 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: Sliding 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

Table 3: Wall mounting (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: Material efficiency (saturation) - sheet metal selection
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 (stability) - thermal limit
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: Safety (HSE) (electronics) - warnings
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
Remote 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: Impact energy (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

Table 9: Coating parameters (durability)
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: 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)

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%
Corrosion 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

*Caution: On a vertical surface, the magnet holds just a fraction of its max power.

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.40

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.

Technical and environmental data
Elemental analysis
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
Magnet pull force

Field Strength

Other proposals

Component MPL 15x15x5 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 5.87 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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. 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 invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 15x15x5 / N38 model is magnetized through the thickness (dimension 5 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (15x15 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 15x15x5 mm, which, at a weight of 8.44 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 15x15x5 mm and a self-weight of 8.44 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.

Advantages

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • They retain magnetic properties for around 10 years – the loss is just ~1% (in theory),
  • Neodymium magnets are characterized by exceptionally resistant to demagnetization caused by external magnetic fields,
  • In other words, due to the smooth layer of gold, the element is aesthetically pleasing,
  • Magnetic induction on the top side of the magnet turns out to be very high,
  • Neodymium magnets are characterized by extremely 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...
  • Possibility of exact shaping as well as optimizing to complex applications,
  • Significant place in innovative solutions – they are utilized in hard drives, drive modules, medical devices, and complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
  • Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to complicate diagnosis medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

The declared magnet strength refers to the peak performance, recorded under optimal environment, specifically:
  • on a base made of structural steel, optimally conducting the magnetic flux
  • whose thickness is min. 10 mm
  • with a plane perfectly flat
  • under conditions of ideal adhesion (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

Practical lifting capacity: influencing factors

Real force is influenced by working environment parameters, mainly (from priority):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – low-carbon steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Safe handling of NdFeB magnets
Maximum temperature

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Warning for heart patients

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

Keep away from children

These products are not intended for children. Eating multiple magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.

Respect the power

Handle magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.

Magnetic media

Do not bring magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Flammability

Powder generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Risk of cracking

Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Hand protection

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Nickel coating and allergies

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands and choose coated magnets.

Keep away from electronics

Note: rare earth magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98