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MPL 20x10x1 / N38 - lamellar magnet

lamellar magnet

Catalog no 020126

GTIN/EAN: 5906301811329

5.00

length

20 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

1.5 g

Magnetization Direction

↑ axial

Load capacity

0.56 kg / 5.46 N

Magnetic Induction

87.15 mT / 871 Gs

Coating

[NiCuNi] Nickel

0.996 with VAT / pcs + price for transport

0.810 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical parameters of the product - MPL 20x10x1 / N38 - lamellar magnet

Specification / characteristics - MPL 20x10x1 / N38 - lamellar magnet

properties
properties values
Cat. no. 020126
GTIN/EAN 5906301811329
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 20 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 1 mm [±0,1 mm]
Weight 1.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.56 kg / 5.46 N
Magnetic Induction ~ ? 87.15 mT / 871 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x10x1 / 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 - technical parameters

These values represent the direct effect of a mathematical simulation. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MPL 20x10x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 871 Gs
87.1 mT
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
safe
1 mm 811 Gs
81.1 mT
0.49 kg / 1.07 LBS
485.7 g / 4.8 N
safe
2 mm 713 Gs
71.3 mT
0.37 kg / 0.83 LBS
374.9 g / 3.7 N
safe
3 mm 603 Gs
60.3 mT
0.27 kg / 0.59 LBS
267.9 g / 2.6 N
safe
5 mm 409 Gs
40.9 mT
0.12 kg / 0.27 LBS
123.4 g / 1.2 N
safe
10 mm 157 Gs
15.7 mT
0.02 kg / 0.04 LBS
18.1 g / 0.2 N
safe
15 mm 69 Gs
6.9 mT
0.00 kg / 0.01 LBS
3.5 g / 0.0 N
safe
20 mm 35 Gs
3.5 mT
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
safe
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
safe
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Shear force (vertical surface)
MPL 20x10x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.11 kg / 0.25 LBS
112.0 g / 1.1 N
1 mm Stal (~0.2) 0.10 kg / 0.22 LBS
98.0 g / 1.0 N
2 mm Stal (~0.2) 0.07 kg / 0.16 LBS
74.0 g / 0.7 N
3 mm Stal (~0.2) 0.05 kg / 0.12 LBS
54.0 g / 0.5 N
5 mm Stal (~0.2) 0.02 kg / 0.05 LBS
24.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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: Wall mounting (sliding) - vertical pull
MPL 20x10x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.17 kg / 0.37 LBS
168.0 g / 1.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.11 kg / 0.25 LBS
112.0 g / 1.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.06 kg / 0.12 LBS
56.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.28 kg / 0.62 LBS
280.0 g / 2.7 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x10x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.06 kg / 0.12 LBS
56.0 g / 0.5 N
1 mm
25%
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
2 mm
50%
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
3 mm
75%
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
5 mm
100%
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
10 mm
100%
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
11 mm
100%
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
12 mm
100%
0.56 kg / 1.23 LBS
560.0 g / 5.5 N

Table 5: Thermal stability (material behavior) - thermal limit
MPL 20x10x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.56 kg / 1.23 LBS
560.0 g / 5.5 N
OK
40 °C -2.2% 0.55 kg / 1.21 LBS
547.7 g / 5.4 N
OK
60 °C -4.4% 0.54 kg / 1.18 LBS
535.4 g / 5.3 N
80 °C -6.6% 0.52 kg / 1.15 LBS
523.0 g / 5.1 N
100 °C -28.8% 0.40 kg / 0.88 LBS
398.7 g / 3.9 N

Table 6: Two magnets (attraction) - field range
MPL 20x10x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.94 kg / 2.06 LBS
1 682 Gs
0.14 kg / 0.31 LBS
140 g / 1.4 N
N/A
1 mm 0.89 kg / 1.96 LBS
1 696 Gs
0.13 kg / 0.29 LBS
133 g / 1.3 N
0.80 kg / 1.76 LBS
~0 Gs
2 mm 0.81 kg / 1.79 LBS
1 623 Gs
0.12 kg / 0.27 LBS
122 g / 1.2 N
0.73 kg / 1.61 LBS
~0 Gs
3 mm 0.72 kg / 1.59 LBS
1 530 Gs
0.11 kg / 0.24 LBS
108 g / 1.1 N
0.65 kg / 1.43 LBS
~0 Gs
5 mm 0.53 kg / 1.18 LBS
1 316 Gs
0.08 kg / 0.18 LBS
80 g / 0.8 N
0.48 kg / 1.06 LBS
~0 Gs
10 mm 0.21 kg / 0.45 LBS
818 Gs
0.03 kg / 0.07 LBS
31 g / 0.3 N
0.19 kg / 0.41 LBS
~0 Gs
20 mm 0.03 kg / 0.07 LBS
313 Gs
0.00 kg / 0.01 LBS
5 g / 0.0 N
0.03 kg / 0.06 LBS
~0 Gs
50 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
60 mm 0.00 kg / 0.00 LBS
25 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
16 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
11 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
8 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
6 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 20x10x1 / 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) 2.5 cm
Mobile device 40 Gs (4.0 mT) 2.0 cm
Car key 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) 0.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MPL 20x10x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.88 km/h
(5.52 m/s)
0.02 J
30 mm 33.76 km/h
(9.38 m/s)
0.07 J
50 mm 43.57 km/h
(12.10 m/s)
0.11 J
100 mm 61.62 km/h
(17.12 m/s)
0.22 J

Table 9: Corrosion resistance
MPL 20x10x1 / 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 20x10x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 173 Mx 21.7 µWb
Pc Coefficient 0.10 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 20x10x1 / N38

Environment Effective steel pull Effect
Air (land) 0.56 kg Standard
Water (riverbed) 0.64 kg
(+0.08 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

*Warning: On a vertical surface, the magnet holds only ~20% of its perpendicular strength.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely weakens the holding force.

3. Power loss vs temp

*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) = 0.10

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: 020126-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other products

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 20x10x1 mm and a weight of 1.5 g, guarantees premium class connection. This rectangular block with a force of 5.46 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. To separate the MPL 20x10x1 / 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 20x10x1 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 0.56 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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 20x10x1 / N38 model is magnetized axially (dimension 1 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.
This model is characterized by dimensions 20x10x1 mm, which, at a weight of 1.5 g, makes it an element with high energy density. It is a magnetic block with dimensions 20x10x1 mm and a self-weight of 1.5 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have constant strength, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
  • They are noted for resistance to demagnetization induced by external field influence,
  • By applying a smooth layer of gold, the element acquires an professional look,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to modularity in designing and the capacity to customize to individual projects,
  • Versatile presence in modern technologies – they serve a role in magnetic memories, brushless drives, medical devices, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Weaknesses

Problematic aspects of neodymium magnets: tips and applications.
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce 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. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Furthermore, small components of these devices 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

Best holding force of the magnet in ideal parameterswhat contributes to it?

The declared magnet strength refers to the maximum value, recorded under optimal environment, specifically:
  • with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • with an ideally smooth contact surface
  • with zero gap (without impurities)
  • during pulling in a direction perpendicular to the mounting surface
  • at ambient temperature room level

Magnet lifting force in use – key factors

Bear in mind that the magnet holding may be lower influenced by elements below, starting with the most relevant:
  • Clearance – the presence of any layer (rust, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures lower magnetic permeability and holding force.
  • Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was determined by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Electronic devices

Very strong magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness happens, cease handling magnets and wear gloves.

Combustion hazard

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Crushing force

Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Keep away from children

Absolutely store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are life-threatening.

Phone sensors

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

Implant safety

Patients with a pacemaker must keep an safe separation from magnets. The magnetism can disrupt the operation of the life-saving device.

Heat sensitivity

Watch the temperature. Exposing the magnet to high heat will ruin its properties and pulling force.

Immense force

Be careful. Rare earth magnets act from a distance and snap with huge force, often quicker than you can move away.

Security! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98