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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

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Parameters as well as structure of a neodymium magnet can be analyzed using our force 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 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 assembly - data

These information constitute the direct effect of a engineering calculation. Results are based on models for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Please consider 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
weak grip
1 mm 811 Gs
81.1 mT
0.49 kg / 1.07 pounds
485.7 g / 4.8 N
weak grip
2 mm 713 Gs
71.3 mT
0.37 kg / 0.83 pounds
374.9 g / 3.7 N
weak grip
3 mm 603 Gs
60.3 mT
0.27 kg / 0.59 pounds
267.9 g / 2.6 N
weak grip
5 mm 409 Gs
40.9 mT
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
weak grip
10 mm 157 Gs
15.7 mT
0.02 kg / 0.04 pounds
18.1 g / 0.2 N
weak grip
15 mm 69 Gs
6.9 mT
0.00 kg / 0.01 pounds
3.5 g / 0.0 N
weak grip
20 mm 35 Gs
3.5 mT
0.00 kg / 0.00 pounds
0.9 g / 0.0 N
weak grip
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Vertical force (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 (shearing) - 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: Material efficiency (substrate influence) - 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 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 resistance (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 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 range
MPL 20x10x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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: Safety (HSE) (implants) - 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 (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: Surface protection spec
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 (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: Submerged application
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

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

2. Efficiency vs thickness

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

3. Heat tolerance

*For standard magnets, the safety limit 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
Chemical composition
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
Quick Unit Converter
Magnet pull force

Field Strength

See also offers

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 20x10x1 mm and a weight of 1.5 g, guarantees the highest quality connection. As a block magnet with high power (approx. 0.56 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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 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.
They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 20x10x1 / 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 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. 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 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 product meets the standards for N38 grade magnets.

Strengths and weaknesses of rare earth magnets.

Strengths

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They retain attractive force for nearly 10 years – the loss is just ~1% (according to analyses),
  • Magnets effectively resist against demagnetization caused by external fields,
  • By covering with a decorative coating of silver, the element has an modern look,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of exact shaping as well as modifying to precise needs,
  • Significant place in electronics industry – they are utilized in computer drives, drive modules, diagnostic systems, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Disadvantages

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of making threads in the magnet and complicated forms - recommended is cover - magnet mounting.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these products can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum magnetic pulling forcewhat it depends on?

The declared magnet strength represents the peak performance, recorded under laboratory conditions, meaning:
  • on a block made of structural steel, perfectly concentrating the magnetic field
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • under conditions of ideal adhesion (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Real force is affected by specific conditions, including (from most important):
  • Air gap (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface quality – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with NdFeB magnets
Mechanical processing

Machining of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

GPS Danger

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Pinching danger

Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing everything in their path. Be careful!

Avoid contact if allergic

Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose coated magnets.

Magnet fragility

Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets leads to them shattering into shards.

Handling guide

Before starting, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Maximum temperature

Avoid heat. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Health Danger

Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Swallowing risk

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of children and animals.

Electronic hazard

Intense magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?