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MPL 15x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020123

GTIN/EAN: 5906301811299

5.00

length

15 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

2.81 g

Magnetization Direction

↑ axial

Load capacity

3.20 kg / 31.38 N

Magnetic Induction

468.69 mT / 4687 Gs

Coating

[NiCuNi] Nickel

1.390 with VAT / pcs + price for transport

1.130 ZŁ net + 23% VAT / pcs

bulk discounts:

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Physical properties - MPL 15x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 15x5x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020123
GTIN/EAN 5906301811299
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 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 2.81 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.20 kg / 31.38 N
Magnetic Induction ~ ? 468.69 mT / 4687 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x5x5 / 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 - report

These values represent the outcome of a mathematical calculation. Values are based on models for the class Nd2Fe14B. Real-world conditions may differ. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MPL 15x5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4682 Gs
468.2 mT
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
warning
1 mm 3410 Gs
341.0 mT
1.70 kg / 3.74 pounds
1697.3 g / 16.7 N
safe
2 mm 2394 Gs
239.4 mT
0.84 kg / 1.84 pounds
836.5 g / 8.2 N
safe
3 mm 1701 Gs
170.1 mT
0.42 kg / 0.93 pounds
422.6 g / 4.1 N
safe
5 mm 928 Gs
92.8 mT
0.13 kg / 0.28 pounds
125.8 g / 1.2 N
safe
10 mm 286 Gs
28.6 mT
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
safe
15 mm 119 Gs
11.9 mT
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
safe
20 mm 59 Gs
5.9 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
safe
30 mm 21 Gs
2.1 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Vertical force (wall)
MPL 15x5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.64 kg / 1.41 pounds
640.0 g / 6.3 N
1 mm Stal (~0.2) 0.34 kg / 0.75 pounds
340.0 g / 3.3 N
2 mm Stal (~0.2) 0.17 kg / 0.37 pounds
168.0 g / 1.6 N
3 mm Stal (~0.2) 0.08 kg / 0.19 pounds
84.0 g / 0.8 N
5 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 (shearing) - behavior on slippery surfaces
MPL 15x5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 15x5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
1 mm
25%
0.80 kg / 1.76 pounds
800.0 g / 7.8 N
2 mm
50%
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
3 mm
75%
2.40 kg / 5.29 pounds
2400.0 g / 23.5 N
5 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
10 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
11 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
12 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N

Table 5: Thermal stability (stability) - power drop
MPL 15x5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
OK
40 °C -2.2% 3.13 kg / 6.90 pounds
3129.6 g / 30.7 N
OK
60 °C -4.4% 3.06 kg / 6.74 pounds
3059.2 g / 30.0 N
80 °C -6.6% 2.99 kg / 6.59 pounds
2988.8 g / 29.3 N
100 °C -28.8% 2.28 kg / 5.02 pounds
2278.4 g / 22.4 N

Table 6: Two magnets (attraction) - field range
MPL 15x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 10.14 kg / 22.35 pounds
5 608 Gs
1.52 kg / 3.35 pounds
1520 g / 14.9 N
N/A
1 mm 7.53 kg / 16.60 pounds
8 071 Gs
1.13 kg / 2.49 pounds
1129 g / 11.1 N
6.78 kg / 14.94 pounds
~0 Gs
2 mm 5.38 kg / 11.85 pounds
6 820 Gs
0.81 kg / 1.78 pounds
806 g / 7.9 N
4.84 kg / 10.67 pounds
~0 Gs
3 mm 3.78 kg / 8.33 pounds
5 716 Gs
0.57 kg / 1.25 pounds
567 g / 5.6 N
3.40 kg / 7.49 pounds
~0 Gs
5 mm 1.87 kg / 4.13 pounds
4 024 Gs
0.28 kg / 0.62 pounds
281 g / 2.8 N
1.68 kg / 3.71 pounds
~0 Gs
10 mm 0.40 kg / 0.88 pounds
1 857 Gs
0.06 kg / 0.13 pounds
60 g / 0.6 N
0.36 kg / 0.79 pounds
~0 Gs
20 mm 0.04 kg / 0.08 pounds
572 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.03 kg / 0.08 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
67 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
41 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
27 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
19 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
14 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
10 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MPL 15x5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - collision effects
MPL 15x5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.11 km/h
(9.48 m/s)
0.13 J
30 mm 58.95 km/h
(16.37 m/s)
0.38 J
50 mm 76.10 km/h
(21.14 m/s)
0.63 J
100 mm 107.62 km/h
(29.90 m/s)
1.26 J

Table 9: Anti-corrosion coating durability
MPL 15x5x5 / 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 15x5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 366 Mx 33.7 µWb
Pc Coefficient 0.60 Low (Flat)

Table 11: Submerged application
MPL 15x5x5 / N38

Environment Effective steel pull Effect
Air (land) 3.20 kg Standard
Water (riverbed) 3.66 kg
(+0.46 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Note: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.60

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
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: 020123-2026
Magnet Unit Converter
Magnet pull force

Field Strength

Other proposals

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 15x5x5 mm and a weight of 2.81 g, guarantees the highest quality connection. This rectangular block with a force of 31.38 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 strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 15x5x5 / 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.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 3.20 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.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. 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 15x5x5 mm, which, at a weight of 2.81 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 3.20 kg (force ~31.38 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros and cons of neodymium magnets.

Pros

Apart from their notable holding force, neodymium magnets have these key benefits:
  • Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • A magnet with a smooth gold surface has better aesthetics,
  • Magnets exhibit huge magnetic induction on the outer side,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • In view of the option of precise shaping and adaptation to custom needs, neodymium magnets can be created in a broad palette of forms and dimensions, which amplifies use scope,
  • Versatile presence in innovative solutions – they are used in HDD drives, drive modules, advanced medical instruments, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets: weaknesses and usage proposals
  • At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's 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 immune to moisture, when using outdoors
  • Due to limitations in producing threads and complex shapes in magnets, we recommend using casing - magnetic mount.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these magnets can disrupt the diagnostic process 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

Maximum lifting force for a neodymium magnet – what contributes to it?

The load parameter shown refers to the limit force, recorded under ideal test conditions, namely:
  • using a base made of high-permeability steel, acting as a magnetic yoke
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • with direct contact (no coatings)
  • during detachment in a direction vertical to the mounting surface
  • at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Real force is influenced by specific conditions, including (from most important):
  • Distance (between the magnet and the metal), since even a very small distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material type – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet 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. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Magnets are brittle

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Dust explosion hazard

Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Phone sensors

Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Do not overheat magnets

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

Do not give to children

Neodymium magnets are not toys. Eating several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates immediate surgery.

Electronic devices

Data protection: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Crushing force

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Allergic reactions

Certain individuals suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Frequent touching may cause dermatitis. We strongly advise use protective gloves.

Danger to pacemakers

Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Immense force

Handle with care. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can move away.

Attention! 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