Product available Ships tomorrow

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

bulk discounts:

Need more?

price from 1 pcs
1.250 ZŁ
1.538 ZŁ
price from 500 pcs
1.175 ZŁ
1.445 ZŁ
price from 2000 pcs
1.100 ZŁ
1.353 ZŁ

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.

Need advice?

Pick up the phone and ask +48 22 499 98 98 or contact us via form our website.
Lifting power along with structure of a magnet can be calculated on our power calculator.

Orders submitted before 14:00 will be dispatched today!

Technical parameters - 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

Technical analysis of the magnet - technical parameters

The following information constitute the direct effect of a mathematical analysis. Results rely on models for the material Nd2Fe14B. Operational performance may differ. Treat these calculations as a reference point during assembly planning.

Table 1: Static force (pull vs distance) - 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
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: Sliding hold (wall)
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: Material efficiency (substrate influence) - 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 (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 (repulsion) - 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: Protective zones (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
Timepiece 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: Impact energy (kinetic energy) - 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: 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: Construction 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: Physics of underwater searching
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: 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 max power.

2. Steel saturation

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

3. Thermal stability

*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 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%
Sustainability
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
Measurement Calculator
Magnet pull force

Magnetic Induction

Other proposals

Component MPL 20x10x2 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 18.44 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.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. 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.
They constitute a key element in the production of wind generators and material handling systems. They work great as invisible mounts under tiles, wood, or glass. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 20x10x2 / N38, we recommend utilizing two-component adhesives (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.
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. 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 high energy density. 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.

Pros as well as cons of rare earth magnets.

Pros

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • Magnets very well protect themselves against loss of magnetization caused by ambient magnetic noise,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of precise forming as well as modifying to complex conditions,
  • Wide application in future technologies – they are utilized in HDD drives, electromotive mechanisms, medical equipment, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Limitations

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complex forms - preferred is cover - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these products can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameterswhat it depends on?

The force parameter is a measurement result performed under standard conditions:
  • using a sheet made of low-carbon steel, acting as a ideal flux conductor
  • whose thickness is min. 10 mm
  • with a surface perfectly flat
  • under conditions of no distance (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Magnet lifting force in use – key factors

During everyday use, the real power depends on a number of factors, listed from most significant:
  • Clearance – the presence of any layer (rust, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Implant safety

Individuals with a pacemaker should keep an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Machining danger

Mechanical processing of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Pinching danger

Large magnets can smash fingers instantly. Do not place your hand between two attracting surfaces.

Magnetic interference

Note: neodymium magnets produce a field that disrupts sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

No play value

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Store away from children and animals.

Warning for allergy sufferers

Certain individuals experience a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact may cause a rash. We strongly advise wear protective gloves.

Do not overheat magnets

Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Magnet fragility

Despite the nickel coating, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Data carriers

Device Safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).

Do not underestimate power

Handle magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.

Caution! Learn more about hazards in the article: Magnet Safety Guide.