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MPL 20x10x1 / N38 - lamellar magnet

lamellar magnet

Catalog no 020126

GTIN/EAN: 5906301811329

5.00
Load capacity 0.56 kg / 5.46 N Magnetic Induction 87.15 mT / 871 Gs
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
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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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 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 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

Engineering modeling of the magnet - data

The following data are the outcome of a physical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (pull 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 pounds
560.0 g / 5.5 N
low risk
1 mm 811 Gs
81.1 mT
0.49 kg / 1.07 pounds
485.7 g / 4.8 N
low risk
2 mm 713 Gs
71.3 mT
0.37 kg / 0.83 pounds
374.9 g / 3.7 N
low risk
3 mm 603 Gs
60.3 mT
0.27 kg / 0.59 pounds
267.9 g / 2.6 N
low risk
5 mm 409 Gs
40.9 mT
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
low risk
10 mm 157 Gs
15.7 mT
0.02 kg / 0.04 pounds
18.1 g / 0.2 N
low risk
15 mm 69 Gs
6.9 mT
0.00 kg / 0.01 pounds
3.5 g / 0.0 N
low risk
20 mm 35 Gs
3.5 mT
0.00 kg / 0.00 pounds
0.9 g / 0.0 N
low risk
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Slippage capacity (wall)
MPL 20x10x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.11 kg / 0.25 pounds
112.0 g / 1.1 N
1 mm Stal (~0.2) 0.10 kg / 0.22 pounds
98.0 g / 1.0 N
2 mm Stal (~0.2) 0.07 kg / 0.16 pounds
74.0 g / 0.7 N
3 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
5 mm Stal (~0.2) 0.02 kg / 0.05 pounds
24.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 (sliding) - behavior on slippery surfaces
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 pounds
168.0 g / 1.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.11 kg / 0.25 pounds
112.0 g / 1.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.06 kg / 0.12 pounds
56.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.28 kg / 0.62 pounds
280.0 g / 2.7 N

Table 4: Steel thickness (saturation) - power losses
MPL 20x10x1 / N38

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

Table 5: Thermal stability (stability) - power drop
MPL 20x10x1 / N38

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

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 20x10x1 / N38

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

Table 7: Hazards (electronics) - warnings
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
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 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 (kinetic energy) - collision effects
MPL 20x10x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.22 km/h
(5.06 m/s)
0.02 J
30 mm 18.47 km/h
(5.13 m/s)
0.02 J
50 mm 18.41 km/h
(5.11 m/s)
0.02 J
100 mm 18.49 km/h
(5.14 m/s)
0.02 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: Electrical data (Pc)
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

1. Shear force

*Caution: On a vertical surface, the magnet retains only ~20% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 0.10

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 specification and ecology

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
Measurement Calculator

Force (pull)


Magnetic Field

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This product is an extremely strong 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.
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 20x10x1 / 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.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 0.56 kg), they are ideal as hidden locks 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 20x10x1 / N38, we recommend utilizing 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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 20x10x1 / N38 model is magnetized through the thickness (dimension 1 mm), which means that the N and S poles are located on its largest, flat surfaces. 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 1 mm (thickness). The key parameter here is the holding force amounting to approximately 0.56 kg (force ~5.46 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Benefits

Besides their exceptional pulling force, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even after approximately ten years – the decrease in strength is only ~1% (according to tests),
  • Neodymium magnets prove to be remarkably resistant to magnetic field loss caused by external interference,
  • By applying a smooth coating of gold, the element acquires an nice look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of detailed creating and optimizing to specific conditions,
  • Fundamental importance in modern industrial fields – they are used in computer drives, brushless drives, precision medical tools, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in miniature devices

Weaknesses

What to avoid - cons of neodymium magnets and proposals for their use:
  • At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these products are able to disrupt the diagnostic process medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a theoretical maximum value performed under specific, ideal conditions:
  • using a sheet made of low-carbon steel, functioning as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • without any clearance between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • at room temperature

Determinants of practical lifting force of a magnet

Please note that the application force may be lower influenced by the following factors, starting with the most relevant:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Handling rules

Exercise caution. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can move away.

Nickel allergy

Some people experience a contact allergy to nickel, which is the common plating for neodymium magnets. Frequent touching might lead to an allergic reaction. We suggest wear safety gloves.

No play value

Always keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.

Crushing risk

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

Pacemakers

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

Dust explosion hazard

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Data carriers

Device Safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Magnet fragility

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Heat sensitivity

Monitor thermal conditions. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.

GPS and phone interference

Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Important! Learn more about risks in the article: Magnet Safety Guide.