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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 data 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 analysis of the assembly - data

These values represent the direct effect of a physical analysis. Values are based on models for the material Nd2Fe14B. Real-world performance may differ. Please consider these data as a reference point for designers.

Table 1: Static pull 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 pounds
5870.0 g / 57.6 N
medium risk
1 mm 2873 Gs
287.3 mT
4.79 kg / 10.57 pounds
4794.1 g / 47.0 N
medium risk
2 mm 2528 Gs
252.8 mT
3.71 kg / 8.18 pounds
3712.5 g / 36.4 N
medium risk
3 mm 2181 Gs
218.1 mT
2.76 kg / 6.09 pounds
2763.0 g / 27.1 N
medium risk
5 mm 1565 Gs
156.5 mT
1.42 kg / 3.14 pounds
1422.0 g / 13.9 N
low risk
10 mm 659 Gs
65.9 mT
0.25 kg / 0.56 pounds
252.1 g / 2.5 N
low risk
15 mm 307 Gs
30.7 mT
0.05 kg / 0.12 pounds
54.7 g / 0.5 N
low risk
20 mm 162 Gs
16.2 mT
0.02 kg / 0.03 pounds
15.2 g / 0.1 N
low risk
30 mm 59 Gs
5.9 mT
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
low risk
50 mm 15 Gs
1.5 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk

Table 2: Vertical hold (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 pounds
1174.0 g / 11.5 N
1 mm Stal (~0.2) 0.96 kg / 2.11 pounds
958.0 g / 9.4 N
2 mm Stal (~0.2) 0.74 kg / 1.64 pounds
742.0 g / 7.3 N
3 mm Stal (~0.2) 0.55 kg / 1.22 pounds
552.0 g / 5.4 N
5 mm Stal (~0.2) 0.28 kg / 0.63 pounds
284.0 g / 2.8 N
10 mm Stal (~0.2) 0.05 kg / 0.11 pounds
50.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - 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 pounds
1761.0 g / 17.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.17 kg / 2.59 pounds
1174.0 g / 11.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.59 kg / 1.29 pounds
587.0 g / 5.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.94 kg / 6.47 pounds
2935.0 g / 28.8 N

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 pounds
587.0 g / 5.8 N
1 mm
25%
1.47 kg / 3.24 pounds
1467.5 g / 14.4 N
2 mm
50%
2.94 kg / 6.47 pounds
2935.0 g / 28.8 N
3 mm
75%
4.40 kg / 9.71 pounds
4402.5 g / 43.2 N
5 mm
100%
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
10 mm
100%
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
11 mm
100%
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
12 mm
100%
5.87 kg / 12.94 pounds
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 pounds
5870.0 g / 57.6 N
OK
40 °C -2.2% 5.74 kg / 12.66 pounds
5740.9 g / 56.3 N
OK
60 °C -4.4% 5.61 kg / 12.37 pounds
5611.7 g / 55.1 N
80 °C -6.6% 5.48 kg / 12.09 pounds
5482.6 g / 53.8 N
100 °C -28.8% 4.18 kg / 9.21 pounds
4179.4 g / 41.0 N

Table 6: Two magnets (attraction) - forces in the system
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 pounds
4 741 Gs
2.10 kg / 4.64 pounds
2103 g / 20.6 N
N/A
1 mm 12.77 kg / 28.15 pounds
6 068 Gs
1.92 kg / 4.22 pounds
1916 g / 18.8 N
11.49 kg / 25.34 pounds
~0 Gs
2 mm 11.45 kg / 25.24 pounds
5 746 Gs
1.72 kg / 3.79 pounds
1717 g / 16.8 N
10.30 kg / 22.72 pounds
~0 Gs
3 mm 10.13 kg / 22.34 pounds
5 405 Gs
1.52 kg / 3.35 pounds
1520 g / 14.9 N
9.12 kg / 20.10 pounds
~0 Gs
5 mm 7.68 kg / 16.93 pounds
4 706 Gs
1.15 kg / 2.54 pounds
1152 g / 11.3 N
6.91 kg / 15.24 pounds
~0 Gs
10 mm 3.40 kg / 7.49 pounds
3 129 Gs
0.51 kg / 1.12 pounds
509 g / 5.0 N
3.06 kg / 6.74 pounds
~0 Gs
20 mm 0.60 kg / 1.33 pounds
1 318 Gs
0.09 kg / 0.20 pounds
90 g / 0.9 N
0.54 kg / 1.19 pounds
~0 Gs
50 mm 0.01 kg / 0.03 pounds
188 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.02 pounds
~0 Gs
60 mm 0.00 kg / 0.01 pounds
118 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
79 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
55 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
40 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
30 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - 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
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: Collisions (kinetic energy) - 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: 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)

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: Underwater work (magnet fishing)
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

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

2. Steel thickness impact

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

3. Power loss vs temp

*For N38 material, 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 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%
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
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Magnet pull force

Field Strength

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 15x15x5 mm and a weight of 8.44 g, guarantees premium class connection. This magnetic block with a force of 57.62 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 strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. 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 magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 5.87 kg), they are ideal as closers in furniture making and mounting elements in automation. 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, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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 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. 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: 15 mm (length), 15 mm (width), and 5 mm (thickness). 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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Apart from their superior holding force, neodymium magnets have these key benefits:
  • Their strength remains stable, and after approximately ten years it drops only by ~1% (according to research),
  • They do not lose their magnetic properties even under external field action,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnets exhibit very high magnetic induction on the outer side,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of exact machining and optimizing to defined needs,
  • Huge importance in electronics industry – they are used in HDD drives, motor assemblies, diagnostic systems, as well as industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited possibility of making nuts in the magnet and complex shapes - recommended is casing - magnetic holder.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Detachment force of the magnet in optimal conditionswhat contributes to it?

The force parameter is a result of laboratory testing executed under specific, ideal conditions:
  • using a base made of low-carbon steel, functioning as a magnetic yoke
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • under conditions of gap-free contact (surface-to-surface)
  • during pulling in a direction perpendicular to the plane
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

It is worth knowing that the application force will differ subject to elements below, starting with the most relevant:
  • Clearance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Warnings
Risk of cracking

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

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.

Dust explosion hazard

Dust created during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Health Danger

For implant holders: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Bone fractures

Danger of trauma: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Keep away from computers

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

Respect the power

Handle magnets consciously. Their immense force can shock even professionals. Plan your moves and do not underestimate their power.

This is not a toy

Neodymium magnets are not toys. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.

Threat to navigation

Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.

Operating temperature

Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. This process is irreversible.

Danger! Details 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