Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

MPL 20x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020128

GTIN/EAN: 5906301811343

5.00
Load capacity 6.15 kg / 60.31 N Magnetic Induction 349.47 mT / 3495 Gs
length
20 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
7.5 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

3.69net / pcs

4.54 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity
Net
Gross
price from 1 pcs
3.69 zł
4.54 zł
price from 200 pcs
3.47 zł
4.27 zł
price from 700 pcs
3.25 zł
3.99 zł

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.

Want to talk magnets?

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.

Order by 14:00 and we’ll ship today!

Product card - MPL 20x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 20x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020128
GTIN/EAN 5906301811343
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 5 mm [±0,1 mm]
Weight 7.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 6.15 kg / 60.31 N
Magnetic Induction ~ ? 349.47 mT / 3495 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x10x5 / N38 - lamellar magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 product - report

The following information are the result of a physical analysis. Values rely on models for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MPL 20x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3493 Gs
349.3 mT
6.15 kg / 13.56 pounds
6150.0 g / 60.3 N
warning
1 mm 3035 Gs
303.5 mT
4.64 kg / 10.23 pounds
4641.8 g / 45.5 N
warning
2 mm 2558 Gs
255.8 mT
3.30 kg / 7.27 pounds
3298.0 g / 32.4 N
warning
3 mm 2120 Gs
212.0 mT
2.26 kg / 4.99 pounds
2264.8 g / 22.2 N
warning
5 mm 1433 Gs
143.3 mT
1.03 kg / 2.28 pounds
1034.5 g / 10.1 N
weak grip
10 mm 574 Gs
57.4 mT
0.17 kg / 0.37 pounds
166.1 g / 1.6 N
weak grip
15 mm 267 Gs
26.7 mT
0.04 kg / 0.08 pounds
35.9 g / 0.4 N
weak grip
20 mm 141 Gs
14.1 mT
0.01 kg / 0.02 pounds
10.1 g / 0.1 N
weak grip
30 mm 52 Gs
5.2 mT
0.00 kg / 0.00 pounds
1.4 g / 0.0 N
weak grip
50 mm 13 Gs
1.3 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip

Table 2: Slippage capacity (wall)
MPL 20x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.23 kg / 2.71 pounds
1230.0 g / 12.1 N
1 mm Stal (~0.2) 0.93 kg / 2.05 pounds
928.0 g / 9.1 N
2 mm Stal (~0.2) 0.66 kg / 1.46 pounds
660.0 g / 6.5 N
3 mm Stal (~0.2) 0.45 kg / 1.00 pounds
452.0 g / 4.4 N
5 mm Stal (~0.2) 0.21 kg / 0.45 pounds
206.0 g / 2.0 N
10 mm Stal (~0.2) 0.03 kg / 0.07 pounds
34.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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 20x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.85 kg / 4.07 pounds
1845.0 g / 18.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.23 kg / 2.71 pounds
1230.0 g / 12.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.62 kg / 1.36 pounds
615.0 g / 6.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.08 kg / 6.78 pounds
3075.0 g / 30.2 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.62 kg / 1.36 pounds
615.0 g / 6.0 N
1 mm
25%
1.54 kg / 3.39 pounds
1537.5 g / 15.1 N
2 mm
50%
3.08 kg / 6.78 pounds
3075.0 g / 30.2 N
3 mm
75%
4.61 kg / 10.17 pounds
4612.5 g / 45.2 N
5 mm
100%
6.15 kg / 13.56 pounds
6150.0 g / 60.3 N
10 mm
100%
6.15 kg / 13.56 pounds
6150.0 g / 60.3 N
11 mm
100%
6.15 kg / 13.56 pounds
6150.0 g / 60.3 N
12 mm
100%
6.15 kg / 13.56 pounds
6150.0 g / 60.3 N

Table 5: Thermal stability (stability) - thermal limit
MPL 20x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 6.15 kg / 13.56 pounds
6150.0 g / 60.3 N
OK
40 °C -2.2% 6.01 kg / 13.26 pounds
6014.7 g / 59.0 N
OK
60 °C -4.4% 5.88 kg / 12.96 pounds
5879.4 g / 57.7 N
80 °C -6.6% 5.74 kg / 12.66 pounds
5744.1 g / 56.3 N
100 °C -28.8% 4.38 kg / 9.65 pounds
4378.8 g / 43.0 N

Table 6: Two magnets (attraction) - forces in the system
MPL 20x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 15.04 kg / 33.17 pounds
4 923 Gs
2.26 kg / 4.98 pounds
2257 g / 22.1 N
N/A
1 mm 13.20 kg / 29.11 pounds
6 544 Gs
1.98 kg / 4.37 pounds
1980 g / 19.4 N
11.88 kg / 26.19 pounds
~0 Gs
2 mm 11.36 kg / 25.03 pounds
6 069 Gs
1.70 kg / 3.76 pounds
1703 g / 16.7 N
10.22 kg / 22.53 pounds
~0 Gs
3 mm 9.63 kg / 21.22 pounds
5 588 Gs
1.44 kg / 3.18 pounds
1444 g / 14.2 N
8.66 kg / 19.10 pounds
~0 Gs
5 mm 6.71 kg / 14.78 pounds
4 664 Gs
1.01 kg / 2.22 pounds
1006 g / 9.9 N
6.03 kg / 13.30 pounds
~0 Gs
10 mm 2.53 kg / 5.58 pounds
2 865 Gs
0.38 kg / 0.84 pounds
380 g / 3.7 N
2.28 kg / 5.02 pounds
~0 Gs
20 mm 0.41 kg / 0.90 pounds
1 148 Gs
0.06 kg / 0.13 pounds
61 g / 0.6 N
0.37 kg / 0.81 pounds
~0 Gs
50 mm 0.01 kg / 0.02 pounds
165 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.01 pounds
104 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
69 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
48 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
35 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
26 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 20x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.5 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Car key 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - warning
MPL 20x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.41 km/h
(6.78 m/s)
0.17 J
30 mm 24.80 km/h
(6.89 m/s)
0.18 J
50 mm 24.80 km/h
(6.89 m/s)
0.18 J
100 mm 24.80 km/h
(6.89 m/s)
0.18 J

Table 9: Anti-corrosion coating durability
MPL 20x10x5 / 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 20x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 7 031 Mx 70.3 µWb
Pc Coefficient 0.42 Low (Flat)

Table 11: Physics of underwater searching
MPL 20x10x5 / N38

Environment Effective steel pull Effect
Air (land) 6.15 kg Standard
Water (riverbed) 7.04 kg
(+0.89 kg buoyancy gain)
+14.5%
Warning: 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

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Steel saturation

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

3. Power loss vs temp

*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) = 0.42

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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%

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: 020128-2026
Measurement Calculator

Magnet pull force


Magnetic Induction

Check out more offers

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 20x10x5 mm and a weight of 7.5 g, guarantees premium class connection. This rectangular block with a force of 60.31 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures 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. To separate the MPL 20x10x5 / 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 20x10x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 20x10x5 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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. 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 20x10x5 mm, which, at a weight of 7.5 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 6.15 kg (force ~60.31 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
  • They are resistant to demagnetization induced by presence of other magnetic fields,
  • A magnet with a metallic nickel surface has an effective appearance,
  • Magnets are distinguished by excellent magnetic induction on the working surface,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Considering the potential of flexible shaping and adaptation to unique solutions, neodymium magnets can be produced in a broad palette of forms and dimensions, which expands the range of possible applications,
  • Wide application in high-tech industry – they are utilized in magnetic memories, electric drive systems, medical equipment, and technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • 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.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum magnetic pulling forcewhat it depends on?

Breakaway force is the result of a measurement for ideal contact conditions, including:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • with a plane cleaned and smooth
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding may be lower influenced by elements below, starting with the most relevant:
  • Distance (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Material type – the best choice is high-permeability steel. Cast iron may attract less.
  • Surface structure – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
Powerful field

Be careful. Neodymium magnets act from a distance and snap with huge force, often quicker than you can move away.

Electronic hazard

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Combustion hazard

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

Swallowing risk

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.

Precision electronics

Note: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.

Shattering risk

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Allergic reactions

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.

Do not overheat magnets

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Pinching danger

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Caution! Need more info? Read our article: Are neodymium magnets dangerous?