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MPL 15x2x30 / N38 - lamellar magnet

lamellar magnet

Catalog no 020121

GTIN/EAN: 5906301811275

5.00

length

15 mm [±0,1 mm]

Width

2 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

6.75 g

Magnetization Direction

→ diametrical

Load capacity

0.68 kg / 6.68 N

Magnetic Induction

614.34 mT / 6143 Gs

Coating

[NiCuNi] Nickel

4.75 with VAT / pcs + price for transport

3.86 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical - MPL 15x2x30 / N38 - lamellar magnet

Specification / characteristics - MPL 15x2x30 / N38 - lamellar magnet

properties
properties values
Cat. no. 020121
GTIN/EAN 5906301811275
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 2 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 6.75 g
Magnetization Direction → diametrical
Load capacity ~ ? 0.68 kg / 6.68 N
Magnetic Induction ~ ? 614.34 mT / 6143 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x2x30 / 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 assembly - data

The following data are the direct effect of a mathematical simulation. Results were calculated on models for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static force (pull vs distance) - power drop
MPL 15x2x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6128 Gs
612.8 mT
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
safe
1 mm 3036 Gs
303.6 mT
0.17 kg / 0.37 lbs
166.8 g / 1.6 N
safe
2 mm 1736 Gs
173.6 mT
0.05 kg / 0.12 lbs
54.5 g / 0.5 N
safe
3 mm 1150 Gs
115.0 mT
0.02 kg / 0.05 lbs
23.9 g / 0.2 N
safe
5 mm 623 Gs
62.3 mT
0.01 kg / 0.02 lbs
7.0 g / 0.1 N
safe
10 mm 218 Gs
21.8 mT
0.00 kg / 0.00 lbs
0.9 g / 0.0 N
safe
15 mm 103 Gs
10.3 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
safe
20 mm 58 Gs
5.8 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe
30 mm 24 Gs
2.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Sliding load (wall)
MPL 15x2x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.14 kg / 0.30 lbs
136.0 g / 1.3 N
1 mm Stal (~0.2) 0.03 kg / 0.07 lbs
34.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 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 (sliding) - behavior on slippery surfaces
MPL 15x2x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.20 kg / 0.45 lbs
204.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.14 kg / 0.30 lbs
136.0 g / 1.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 lbs
68.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.34 kg / 0.75 lbs
340.0 g / 3.3 N

Table 4: Material efficiency (saturation) - power losses
MPL 15x2x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.15 lbs
68.0 g / 0.7 N
1 mm
25%
0.17 kg / 0.37 lbs
170.0 g / 1.7 N
2 mm
50%
0.34 kg / 0.75 lbs
340.0 g / 3.3 N
3 mm
75%
0.51 kg / 1.12 lbs
510.0 g / 5.0 N
5 mm
100%
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
10 mm
100%
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
11 mm
100%
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
12 mm
100%
0.68 kg / 1.50 lbs
680.0 g / 6.7 N

Table 5: Working in heat (material behavior) - resistance threshold
MPL 15x2x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.68 kg / 1.50 lbs
680.0 g / 6.7 N
OK
40 °C -2.2% 0.67 kg / 1.47 lbs
665.0 g / 6.5 N
OK
60 °C -4.4% 0.65 kg / 1.43 lbs
650.1 g / 6.4 N
OK
80 °C -6.6% 0.64 kg / 1.40 lbs
635.1 g / 6.2 N
100 °C -28.8% 0.48 kg / 1.07 lbs
484.2 g / 4.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 15x2x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 6.95 kg / 15.31 lbs
6 152 Gs
1.04 kg / 2.30 lbs
1042 g / 10.2 N
N/A
1 mm 3.45 kg / 7.62 lbs
8 643 Gs
0.52 kg / 1.14 lbs
518 g / 5.1 N
3.11 kg / 6.85 lbs
~0 Gs
2 mm 1.70 kg / 3.76 lbs
6 071 Gs
0.26 kg / 0.56 lbs
256 g / 2.5 N
1.53 kg / 3.38 lbs
~0 Gs
3 mm 0.93 kg / 2.05 lbs
4 482 Gs
0.14 kg / 0.31 lbs
139 g / 1.4 N
0.84 kg / 1.84 lbs
~0 Gs
5 mm 0.36 kg / 0.79 lbs
2 788 Gs
0.05 kg / 0.12 lbs
54 g / 0.5 N
0.32 kg / 0.71 lbs
~0 Gs
10 mm 0.07 kg / 0.16 lbs
1 247 Gs
0.01 kg / 0.02 lbs
11 g / 0.1 N
0.06 kg / 0.14 lbs
~0 Gs
20 mm 0.01 kg / 0.02 lbs
435 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
71 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
47 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
33 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
24 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
18 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
14 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MPL 15x2x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 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 (cracking risk) - warning
MPL 15x2x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.13 km/h
(2.81 m/s)
0.03 J
30 mm 17.53 km/h
(4.87 m/s)
0.08 J
50 mm 22.63 km/h
(6.29 m/s)
0.13 J
100 mm 32.01 km/h
(8.89 m/s)
0.27 J

Table 9: Anti-corrosion coating durability
MPL 15x2x30 / 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 15x2x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 210 Mx 22.1 µWb
Pc Coefficient 1.54 High (Stable)

Table 11: Hydrostatics and buoyancy
MPL 15x2x30 / N38

Environment Effective steel pull Effect
Air (land) 0.68 kg Standard
Water (riverbed) 0.78 kg
(+0.10 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Warning: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.54

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.

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%
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: 020121-2026
Quick Unit Converter
Force (pull)

Field Strength

Check out more proposals

This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 15x2x30 mm and a weight of 6.75 g, guarantees premium class connection. As a magnetic bar with high power (approx. 0.68 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures 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 15x2x30 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, 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 15x2x30 / 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. 0.68 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.
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. In practice, this means that this magnet has the greatest attraction force on its main planes (15x2 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 15x2x30 mm, which, at a weight of 6.75 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 0.68 kg (force ~6.68 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of rare earth magnets.

Benefits

Besides their durability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets are exceptionally resistant to magnetic field loss caused by external magnetic fields,
  • The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
  • 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...
  • Thanks to versatility in designing and the capacity to adapt to complex applications,
  • Universal use in high-tech industry – they are used in hard drives, motor assemblies, medical devices, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems

Limitations

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Limited possibility of making nuts in the magnet and complicated forms - recommended is casing - magnet mounting.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat affects it?

Breakaway force was defined for the most favorable conditions, taking into account:
  • using a base made of high-permeability steel, serving as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • with an ideally smooth touching surface
  • with zero gap (no impurities)
  • during detachment in a direction vertical to the mounting surface
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

Holding efficiency impacted by specific conditions, mainly (from priority):
  • Gap (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Safe handling of neodymium magnets
Handling rules

Exercise caution. Neodymium magnets act from a distance and connect with huge force, often quicker than you can react.

Phone sensors

Remember: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, device, and GPS.

Skin irritation risks

Certain individuals experience a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching can result in a rash. We recommend use safety gloves.

Thermal limits

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Protective goggles

Beware of splinters. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.

Serious injuries

Large magnets can smash fingers instantly. Under no circumstances place your hand between two strong magnets.

Threat to electronics

Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Life threat

Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Danger to the youngest

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a critical condition and necessitates urgent medical intervention.

Do not drill into magnets

Powder produced during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Important! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98