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MPL 20x10x2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020127

GTIN/EAN: 5906301811336

5.00
Load capacity 1.88 kg / 18.44 N Magnetic Induction 168.24 mT / 1682 Gs
length
20 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
3 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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price from 1 pcs
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price from 500 pcs
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price from 2000 pcs
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Frequently asked questions

How much will a block magnet really hold?
The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.
What is the maximum working temperature?
Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.
What safety factor should I allow?
At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - MPL 20x10x2 / N38 - lamellar magnet

Specification / characteristics - MPL 20x10x2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020127
GTIN/EAN 5906301811336
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 2 mm [±0,1 mm]
Weight 3 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.88 kg / 18.44 N
Magnetic Induction ~ ? 168.24 mT / 1682 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x10x2 / N38 - lamellar magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 simulation of the assembly - data

Presented values represent the outcome of a mathematical calculation. Values were calculated on models for the material Nd2Fe14B. Actual performance may deviate from the simulation results. Please consider these data as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - characteristics
MPL 20x10x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1682 Gs
168.2 mT
1.88 kg / 4.14 pounds
1880.0 g / 18.4 N
safe
1 mm 1524 Gs
152.4 mT
1.54 kg / 3.40 pounds
1544.3 g / 15.1 N
safe
2 mm 1316 Gs
131.6 mT
1.15 kg / 2.54 pounds
1150.1 g / 11.3 N
safe
3 mm 1101 Gs
110.1 mT
0.81 kg / 1.78 pounds
806.0 g / 7.9 N
safe
5 mm 744 Gs
74.4 mT
0.37 kg / 0.81 pounds
367.6 g / 3.6 N
safe
10 mm 288 Gs
28.8 mT
0.06 kg / 0.12 pounds
55.1 g / 0.5 N
safe
15 mm 129 Gs
12.9 mT
0.01 kg / 0.02 pounds
11.1 g / 0.1 N
safe
20 mm 66 Gs
6.6 mT
0.00 kg / 0.01 pounds
2.9 g / 0.0 N
safe
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
safe
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Slippage force (wall)
MPL 20x10x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.38 kg / 0.83 pounds
376.0 g / 3.7 N
1 mm Stal (~0.2) 0.31 kg / 0.68 pounds
308.0 g / 3.0 N
2 mm Stal (~0.2) 0.23 kg / 0.51 pounds
230.0 g / 2.3 N
3 mm Stal (~0.2) 0.16 kg / 0.36 pounds
162.0 g / 1.6 N
5 mm Stal (~0.2) 0.07 kg / 0.16 pounds
74.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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) - vertical pull
MPL 20x10x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.56 kg / 1.24 pounds
564.0 g / 5.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.38 kg / 0.83 pounds
376.0 g / 3.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.41 pounds
188.0 g / 1.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.94 kg / 2.07 pounds
940.0 g / 9.2 N

Table 4: Material efficiency (saturation) - power losses
MPL 20x10x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.19 kg / 0.41 pounds
188.0 g / 1.8 N
1 mm
25%
0.47 kg / 1.04 pounds
470.0 g / 4.6 N
2 mm
50%
0.94 kg / 2.07 pounds
940.0 g / 9.2 N
3 mm
75%
1.41 kg / 3.11 pounds
1410.0 g / 13.8 N
5 mm
100%
1.88 kg / 4.14 pounds
1880.0 g / 18.4 N
10 mm
100%
1.88 kg / 4.14 pounds
1880.0 g / 18.4 N
11 mm
100%
1.88 kg / 4.14 pounds
1880.0 g / 18.4 N
12 mm
100%
1.88 kg / 4.14 pounds
1880.0 g / 18.4 N

Table 5: Thermal resistance (stability) - thermal limit
MPL 20x10x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.88 kg / 4.14 pounds
1880.0 g / 18.4 N
OK
40 °C -2.2% 1.84 kg / 4.05 pounds
1838.6 g / 18.0 N
OK
60 °C -4.4% 1.80 kg / 3.96 pounds
1797.3 g / 17.6 N
80 °C -6.6% 1.76 kg / 3.87 pounds
1755.9 g / 17.2 N
100 °C -28.8% 1.34 kg / 2.95 pounds
1338.6 g / 13.1 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 20x10x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.49 kg / 7.69 pounds
2 995 Gs
0.52 kg / 1.15 pounds
523 g / 5.1 N
N/A
1 mm 3.21 kg / 7.08 pounds
3 227 Gs
0.48 kg / 1.06 pounds
481 g / 4.7 N
2.89 kg / 6.37 pounds
~0 Gs
2 mm 2.87 kg / 6.32 pounds
3 049 Gs
0.43 kg / 0.95 pounds
430 g / 4.2 N
2.58 kg / 5.69 pounds
~0 Gs
3 mm 2.50 kg / 5.51 pounds
2 846 Gs
0.37 kg / 0.83 pounds
375 g / 3.7 N
2.25 kg / 4.95 pounds
~0 Gs
5 mm 1.80 kg / 3.96 pounds
2 414 Gs
0.27 kg / 0.59 pounds
269 g / 2.6 N
1.62 kg / 3.56 pounds
~0 Gs
10 mm 0.68 kg / 1.50 pounds
1 487 Gs
0.10 kg / 0.23 pounds
102 g / 1.0 N
0.61 kg / 1.35 pounds
~0 Gs
20 mm 0.10 kg / 0.23 pounds
576 Gs
0.02 kg / 0.03 pounds
15 g / 0.2 N
0.09 kg / 0.20 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
76 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
47 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
31 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
21 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
15 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
11 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 20x10x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 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 (cracking risk) - warning
MPL 20x10x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.55 km/h
(6.26 m/s)
0.06 J
30 mm 22.87 km/h
(6.35 m/s)
0.06 J
50 mm 22.86 km/h
(6.35 m/s)
0.06 J
100 mm 22.88 km/h
(6.36 m/s)
0.06 J

Table 9: Coating parameters (durability)
MPL 20x10x2 / 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 20x10x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 825 Mx 38.2 µWb
Pc Coefficient 0.19 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 20x10x2 / N38

Environment Effective steel pull Effect
Air (land) 1.88 kg Standard
Water (riverbed) 2.15 kg
(+0.27 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

*Warning: On a vertical wall, the magnet retains merely ~20% of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Thermal stability

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.19

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

Elemental analysis

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: 020127-2026
Quick Unit Converter

Pulling force


Magnetic Induction

Other offers

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 20x10x2 mm and a weight of 3 g, guarantees premium class connection. As a block magnet with high power (approx. 1.88 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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 1.88 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 20x10x2 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 20x10x2 / N38, it is best to use two-component adhesives (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 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 (20x10 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 20 mm (length), 10 mm (width), and 2 mm (thickness). It is a magnetic block with dimensions 20x10x2 mm and a self-weight of 3 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of neodymium magnets.

Pros

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • They retain full power for around 10 years – the drop is just ~1% (based on simulations),
  • Neodymium magnets are distinguished by exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • A magnet with a smooth gold surface looks better,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to modularity in designing and the ability to adapt to specific needs,
  • Universal use in advanced technology sectors – they are commonly used in hard drives, motor assemblies, advanced medical instruments, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complex forms in magnets, we propose using a housing - magnetic mount.
  • Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

Maximum lifting capacity of the magnetwhat contributes to it?

Information about lifting capacity was determined for ideal contact conditions, assuming:
  • on a base made of mild steel, effectively closing the magnetic field
  • with a thickness of at least 10 mm
  • with an ground contact surface
  • without the slightest clearance between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

Please note that the magnet holding may be lower subject to elements below, starting with the most relevant:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Eye protection

Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Product not for children

Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Allergic reactions

It is widely known that the nickel plating (the usual finish) is a common allergen. If you have an allergy, prevent touching magnets with bare hands or choose versions in plastic housing.

Thermal limits

Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Bone fractures

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Handling rules

Use magnets with awareness. Their huge power can surprise even professionals. Stay alert and respect their force.

GPS and phone interference

A powerful magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Maintain magnets near a device to prevent breaking the sensors.

Threat to electronics

Data protection: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

Machining danger

Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Implant safety

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Warning! Looking for details? Check our post: Why are neodymium magnets dangerous?