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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

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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

Physical modeling of the assembly - technical parameters

The following values constitute the result of a engineering calculation. Results rely on algorithms for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Use these calculations as a reference point when designing systems.

Table 1: Static force (force vs gap) - 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
warning
1 mm 2873 Gs
287.3 mT
4.79 kg / 10.57 lbs
4794.1 g / 47.0 N
warning
2 mm 2528 Gs
252.8 mT
3.71 kg / 8.18 lbs
3712.5 g / 36.4 N
warning
3 mm 2181 Gs
218.1 mT
2.76 kg / 6.09 lbs
2763.0 g / 27.1 N
warning
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 load (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) - 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 (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: Two magnets (repulsion) - 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 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: Protective zones (implants) - 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
Phone / Smartphone 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: 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: 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 (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: 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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) drastically 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.

Engineering data and GPSR
Chemical composition
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%
Sustainability
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
Quick Unit Converter
Force (pull)

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. This rectangular 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.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 5.87 kg can pinch very hard and cause hematomas. 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 filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 5.87 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
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).
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. 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.

Strengths and weaknesses of neodymium magnets.

Benefits

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • Magnets perfectly protect themselves against loss of magnetization caused by ambient magnetic noise,
  • Thanks to the reflective finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an elegant appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the capacity to customize to specific needs,
  • Fundamental importance in innovative solutions – they serve a role in magnetic memories, brushless drives, advanced medical instruments, also modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Breakaway force was defined for the most favorable conditions, including:
  • with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
  • whose transverse dimension is min. 10 mm
  • with an polished touching surface
  • under conditions of no distance (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

Effective lifting capacity is affected by working environment parameters, including (from priority):
  • Distance – the presence of foreign body (rust, dirt, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Temperature – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Electronic hazard

Do not bring magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Allergic reactions

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, cease handling magnets and use protective gear.

This is not a toy

NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Finger safety

Big blocks can crush fingers instantly. Under no circumstances put your hand between two strong magnets.

Flammability

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

Life threat

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

GPS and phone interference

Note: rare earth magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, device, and GPS.

Material brittleness

Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.

Handling rules

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Heat sensitivity

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Important! Learn more about hazards in the article: Safety of working with magnets.