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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

Engineering analysis of the assembly - technical parameters

The following values represent the result of a mathematical analysis. Values rely on models for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Please consider these data as a reference point when designing systems.

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

Table 2: Slippage hold (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: Wall mounting (sliding) - behavior on slippery surfaces
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: Working in heat (stability) - power drop
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: Hazards (electronics) - 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
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

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

2. Steel thickness impact

*Thin steel (e.g. computer case) severely limits the holding force.

3. Power loss vs temp

*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) = 0.19

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
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: 020127-2026
Magnet Unit Converter
Magnet pull force

Field Strength

Other products

Component MPL 20x10x2 / N38 features a flat shape and professional pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 1.88 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 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 20x10x2 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, 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 20x10x2 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 1.88 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 20x10x2 / N38 model is magnetized axially (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. 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). The key parameter here is the lifting capacity amounting to approximately 1.88 kg (force ~18.44 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of rare earth magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose power, even over approximately ten years – the reduction in power is only ~1% (theoretically),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • In other words, due to the shiny surface of silver, the element gains a professional look,
  • Magnetic induction on the working part of the magnet turns out to be very high,
  • Neodymium magnets are characterized by very 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...
  • Possibility of custom shaping as well as adjusting to specific conditions,
  • Wide application in modern industrial fields – they are commonly used in data components, electric motors, medical devices, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in compact constructions

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their strength 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited ability of creating threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices can be problematic in diagnostics medical when they are in the body.
  • With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Detachment force of the magnet in optimal conditionswhat it depends on?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • using a sheet made of mild steel, acting as a ideal flux conductor
  • with a cross-section minimum 10 mm
  • with an ground touching surface
  • with total lack of distance (without impurities)
  • during pulling in a direction vertical to the mounting surface
  • at room temperature

Practical aspects of lifting capacity – factors

In real-world applications, the actual lifting capacity depends on several key aspects, ranked from most significant:
  • Gap (betwixt the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of nominal force).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Cast iron may attract less.
  • Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets
Allergic reactions

Studies show that nickel (the usual finish) is a common allergen. If you have an allergy, avoid direct skin contact and select versions in plastic housing.

Bodily injuries

Danger of trauma: The pulling power is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Magnet fragility

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets leads to them cracking into shards.

Pacemakers

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

GPS and phone interference

Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Conscious usage

Use magnets with awareness. Their powerful strength can shock even experienced users. Stay alert and respect their power.

Magnetic media

Intense magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Power loss in heat

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Do not drill into magnets

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Danger to the youngest

Only for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep out of reach of kids and pets.

Caution! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98