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MPL 20x10x2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020127

GTIN/EAN: 5906301811336

5.00

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

1.538 with VAT / pcs + price for transport

1.250 ZŁ net + 23% VAT / pcs

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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
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 modeling of the magnet - report

Presented values constitute the outcome of a physical analysis. Values rely on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static 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 LBS
1880.0 g / 18.4 N
low risk
1 mm 1524 Gs
152.4 mT
1.54 kg / 3.40 LBS
1544.3 g / 15.1 N
low risk
2 mm 1316 Gs
131.6 mT
1.15 kg / 2.54 LBS
1150.1 g / 11.3 N
low risk
3 mm 1101 Gs
110.1 mT
0.81 kg / 1.78 LBS
806.0 g / 7.9 N
low risk
5 mm 744 Gs
74.4 mT
0.37 kg / 0.81 LBS
367.6 g / 3.6 N
low risk
10 mm 288 Gs
28.8 mT
0.06 kg / 0.12 LBS
55.1 g / 0.5 N
low risk
15 mm 129 Gs
12.9 mT
0.01 kg / 0.02 LBS
11.1 g / 0.1 N
low risk
20 mm 66 Gs
6.6 mT
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
low risk
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
low risk
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk

Table 2: Shear capacity (vertical surface)
MPL 20x10x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.38 kg / 0.83 LBS
376.0 g / 3.7 N
1 mm Stal (~0.2) 0.31 kg / 0.68 LBS
308.0 g / 3.0 N
2 mm Stal (~0.2) 0.23 kg / 0.51 LBS
230.0 g / 2.3 N
3 mm Stal (~0.2) 0.16 kg / 0.36 LBS
162.0 g / 1.6 N
5 mm Stal (~0.2) 0.07 kg / 0.16 LBS
74.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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 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 LBS
564.0 g / 5.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.38 kg / 0.83 LBS
376.0 g / 3.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.41 LBS
188.0 g / 1.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.94 kg / 2.07 LBS
940.0 g / 9.2 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x10x2 / N38

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

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 20x10x2 / N38

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

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

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

Table 7: Safety (HSE) (implants) - warnings
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
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) - collision effects
MPL 20x10x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.70 km/h
(7.14 m/s)
0.08 J
30 mm 43.73 km/h
(12.15 m/s)
0.22 J
50 mm 56.45 km/h
(15.68 m/s)
0.37 J
100 mm 79.84 km/h
(22.18 m/s)
0.74 J

Table 9: Corrosion resistance
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: Construction data (Pc)
MPL 20x10x2 / N38

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

Table 11: Submerged application
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%
Corrosion 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 just a fraction of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*For N38 material, the safety limit is 80°C.

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

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

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
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%
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: 020127-2026
Quick Unit Converter
Magnet pull force

Magnetic Field

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 magnetic bar with high power (approx. 1.88 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating protects 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 1.88 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 20x10x2 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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.
Standardly, the MPL 20x10x2 / N38 model is magnetized through the thickness (dimension 2 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. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 20x10x2 mm, which, at a weight of 3 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 1.88 kg (force ~18.44 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even over nearly ten years – the reduction in power is only ~1% (theoretically),
  • Magnets very well defend themselves against loss of magnetization caused by foreign field sources,
  • A magnet with a metallic gold surface has better aesthetics,
  • Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to versatility in constructing and the capacity to adapt to individual projects,
  • Universal use in electronics industry – they are utilized in hard drives, electric drive systems, precision medical tools, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: application proposals
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating threads in the magnet and complicated shapes - recommended is cover - mounting mechanism.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat it depends on?

Magnet power was determined for ideal contact conditions, assuming:
  • using a sheet made of mild steel, functioning as a circuit closing element
  • with a thickness of at least 10 mm
  • characterized by even structure
  • under conditions of no distance (surface-to-surface)
  • under axial application of breakaway force (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

Holding efficiency impacted by specific conditions, such as (from priority):
  • Air gap (between the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Direction of force – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Chemical composition of the base – low-carbon steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings
Physical harm

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Dust is flammable

Powder created during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Magnetic media

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Precision electronics

Note: neodymium magnets produce a field that disrupts precision electronics. Maintain a separation from your phone, tablet, and GPS.

Magnet fragility

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Immense force

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Avoid contact if allergic

Medical facts indicate that nickel (the usual finish) is a potent allergen. For allergy sufferers, refrain from direct skin contact or opt for versions in plastic housing.

Heat sensitivity

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

Life threat

Patients with a heart stimulator should keep an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

This is not a toy

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates urgent medical intervention.

Safety First! 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