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MPL 15x3x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020122

GTIN/EAN: 5906301811282

5.00

length

15 mm [±0,1 mm]

Width

3 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

2.03 g

Magnetization Direction

↑ axial

Load capacity

1.90 kg / 18.68 N

Magnetic Induction

543.23 mT / 5432 Gs

Coating

[NiCuNi] Nickel

0.726 with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

bulk discounts:

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Physical properties - MPL 15x3x6 / N38 - lamellar magnet

Specification / characteristics - MPL 15x3x6 / N38 - lamellar magnet

properties
properties values
Cat. no. 020122
GTIN/EAN 5906301811282
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 3 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 2.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.90 kg / 18.68 N
Magnetic Induction ~ ? 543.23 mT / 5432 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x3x6 / 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 analysis of the magnet - report

The following data constitute the result of a physical analysis. Results rely on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these data as a supplementary guide during assembly planning.

Table 1: Static force (force vs gap) - characteristics
MPL 15x3x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5423 Gs
542.3 mT
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
low risk
1 mm 3221 Gs
322.1 mT
0.67 kg / 1.48 lbs
670.2 g / 6.6 N
low risk
2 mm 1942 Gs
194.2 mT
0.24 kg / 0.54 lbs
243.7 g / 2.4 N
low risk
3 mm 1274 Gs
127.4 mT
0.10 kg / 0.23 lbs
104.9 g / 1.0 N
low risk
5 mm 652 Gs
65.2 mT
0.03 kg / 0.06 lbs
27.5 g / 0.3 N
low risk
10 mm 195 Gs
19.5 mT
0.00 kg / 0.01 lbs
2.5 g / 0.0 N
low risk
15 mm 81 Gs
8.1 mT
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
low risk
20 mm 41 Gs
4.1 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk
30 mm 14 Gs
1.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
50 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Sliding capacity (vertical surface)
MPL 15x3x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.38 kg / 0.84 lbs
380.0 g / 3.7 N
1 mm Stal (~0.2) 0.13 kg / 0.30 lbs
134.0 g / 1.3 N
2 mm Stal (~0.2) 0.05 kg / 0.11 lbs
48.0 g / 0.5 N
3 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
5 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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) - vertical pull
MPL 15x3x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.57 kg / 1.26 lbs
570.0 g / 5.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.38 kg / 0.84 lbs
380.0 g / 3.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.95 kg / 2.09 lbs
950.0 g / 9.3 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 15x3x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
1 mm
25%
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
2 mm
50%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
3 mm
75%
1.42 kg / 3.14 lbs
1425.0 g / 14.0 N
5 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
10 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
11 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
12 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 15x3x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
OK
40 °C -2.2% 1.86 kg / 4.10 lbs
1858.2 g / 18.2 N
OK
60 °C -4.4% 1.82 kg / 4.00 lbs
1816.4 g / 17.8 N
OK
80 °C -6.6% 1.77 kg / 3.91 lbs
1774.6 g / 17.4 N
100 °C -28.8% 1.35 kg / 2.98 lbs
1352.8 g / 13.3 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 15x3x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 8.16 kg / 17.99 lbs
5 914 Gs
1.22 kg / 2.70 lbs
1224 g / 12.0 N
N/A
1 mm 4.96 kg / 10.94 lbs
8 460 Gs
0.74 kg / 1.64 lbs
745 g / 7.3 N
4.47 kg / 9.85 lbs
~0 Gs
2 mm 2.88 kg / 6.34 lbs
6 441 Gs
0.43 kg / 0.95 lbs
432 g / 4.2 N
2.59 kg / 5.71 lbs
~0 Gs
3 mm 1.70 kg / 3.75 lbs
4 950 Gs
0.25 kg / 0.56 lbs
255 g / 2.5 N
1.53 kg / 3.37 lbs
~0 Gs
5 mm 0.67 kg / 1.48 lbs
3 116 Gs
0.10 kg / 0.22 lbs
101 g / 1.0 N
0.61 kg / 1.34 lbs
~0 Gs
10 mm 0.12 kg / 0.26 lbs
1 304 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.23 lbs
~0 Gs
20 mm 0.01 kg / 0.02 lbs
391 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
46 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
29 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
19 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
13 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
9 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
7 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) - precautionary measures
MPL 15x3x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (cracking risk) - warning
MPL 15x3x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 30.88 km/h
(8.58 m/s)
0.07 J
30 mm 53.44 km/h
(14.84 m/s)
0.22 J
50 mm 68.99 km/h
(19.16 m/s)
0.37 J
100 mm 97.57 km/h
(27.10 m/s)
0.75 J

Table 9: Surface protection spec
MPL 15x3x6 / 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 (Pc)
MPL 15x3x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 390 Mx 23.9 µWb
Pc Coefficient 0.79 High (Stable)

Table 11: Underwater work (magnet fishing)
MPL 15x3x6 / N38

Environment Effective steel pull Effect
Air (land) 1.90 kg Standard
Water (riverbed) 2.18 kg
(+0.28 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

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

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Heat tolerance

*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) = 0.79

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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%
Environmental data
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: 020122-2026
Measurement Calculator
Force (pull)

Magnetic Field

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Model MPL 15x3x6 / N38 features a low profile and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 1.90 kg), this product is available off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting 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. Watch your fingers! Magnets with a force of 1.90 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 15x3x6 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 1.90 kg), they are ideal as closers 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 15x3x6 / 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 roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 15x3x6 / N38 model is magnetized axially (dimension 6 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 (15x3 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 15 mm (length), 3 mm (width), and 6 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 1.90 kg (force ~18.68 N), which, with such a compact shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of neodymium magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after nearly ten years – the drop in lifting capacity is only ~1% (theoretically),
  • Magnets effectively protect themselves against demagnetization caused by external fields,
  • In other words, due to the glossy surface of silver, the element is aesthetically pleasing,
  • They show high magnetic induction at the operating surface, which increases their power,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Thanks to versatility in designing and the capacity to modify to complex applications,
  • Huge importance in electronics industry – they are utilized in mass storage devices, electromotive mechanisms, medical devices, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing nuts and complex shapes in magnets, we recommend using cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can be problematic in diagnostics medical in case of swallowing.
  • Due to neodymium price, their price is higher than average,

Lifting parameters

Magnetic strength at its maximum – what affects it?

Holding force of 1.90 kg is a theoretical maximum value conducted under the following configuration:
  • using a plate made of high-permeability steel, functioning as a magnetic yoke
  • with a cross-section no less than 10 mm
  • with an ideally smooth touching surface
  • without the slightest clearance between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Practical lifting capacity: influencing factors

In practice, the real power is determined by a number of factors, presented from the most important:
  • Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

Warnings
Danger to pacemakers

Patients with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.

Permanent damage

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Sensitization to coating

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for coated magnets.

Protective goggles

Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them shattering into small pieces.

Phone sensors

GPS units and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Pinching danger

Big blocks can break fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Keep away from computers

Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Flammability

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

No play value

Neodymium magnets are not toys. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.

Safe operation

Exercise caution. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can react.

Important! 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