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Reliable solutions for mounting non-invasive. Threaded mounts (external or internal) guarantee quick improvement of work on warehouses. They are indispensable mounting lamps, sensors and banners.

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MPL 30x10x8 / N38 - lamellar magnet

lamellar magnet

Catalog no 020139

GTIN/EAN: 5906301811459

5.00

length

30 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

18 g

Magnetization Direction

↑ axial

Load capacity

12.13 kg / 119.04 N

Magnetic Induction

427.56 mT / 4276 Gs

Coating

[NiCuNi] Nickel

10.71 with VAT / pcs + price for transport

8.71 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical details - MPL 30x10x8 / N38 - lamellar magnet

Specification / characteristics - MPL 30x10x8 / N38 - lamellar magnet

properties
properties values
Cat. no. 020139
GTIN/EAN 5906301811459
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 30 mm [±0,1 mm]
Width 10 mm [±0,1 mm]
Height 8 mm [±0,1 mm]
Weight 18 g
Magnetization Direction ↑ axial
Load capacity ~ ? 12.13 kg / 119.04 N
Magnetic Induction ~ ? 427.56 mT / 4276 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x10x8 / 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 values represent the outcome of a physical calculation. Values rely on algorithms for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MPL 30x10x8 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4273 Gs
427.3 mT
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
crushing
1 mm 3683 Gs
368.3 mT
9.01 kg / 19.86 pounds
9009.7 g / 88.4 N
strong
2 mm 3109 Gs
310.9 mT
6.42 kg / 14.15 pounds
6419.9 g / 63.0 N
strong
3 mm 2600 Gs
260.0 mT
4.49 kg / 9.90 pounds
4488.7 g / 44.0 N
strong
5 mm 1818 Gs
181.8 mT
2.20 kg / 4.84 pounds
2195.3 g / 21.5 N
strong
10 mm 825 Gs
82.5 mT
0.45 kg / 1.00 pounds
452.4 g / 4.4 N
weak grip
15 mm 431 Gs
43.1 mT
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
weak grip
20 mm 248 Gs
24.8 mT
0.04 kg / 0.09 pounds
41.0 g / 0.4 N
weak grip
30 mm 101 Gs
10.1 mT
0.01 kg / 0.02 pounds
6.8 g / 0.1 N
weak grip
50 mm 28 Gs
2.8 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
weak grip

Table 2: Slippage load (vertical surface)
MPL 30x10x8 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.43 kg / 5.35 pounds
2426.0 g / 23.8 N
1 mm Stal (~0.2) 1.80 kg / 3.97 pounds
1802.0 g / 17.7 N
2 mm Stal (~0.2) 1.28 kg / 2.83 pounds
1284.0 g / 12.6 N
3 mm Stal (~0.2) 0.90 kg / 1.98 pounds
898.0 g / 8.8 N
5 mm Stal (~0.2) 0.44 kg / 0.97 pounds
440.0 g / 4.3 N
10 mm Stal (~0.2) 0.09 kg / 0.20 pounds
90.0 g / 0.9 N
15 mm Stal (~0.2) 0.02 kg / 0.05 pounds
24.0 g / 0.2 N
20 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x10x8 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.64 kg / 8.02 pounds
3639.0 g / 35.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.43 kg / 5.35 pounds
2426.0 g / 23.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.21 kg / 2.67 pounds
1213.0 g / 11.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.07 kg / 13.37 pounds
6065.0 g / 59.5 N

Table 4: Steel thickness (saturation) - power losses
MPL 30x10x8 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.61 kg / 1.34 pounds
606.5 g / 5.9 N
1 mm
13%
1.52 kg / 3.34 pounds
1516.3 g / 14.9 N
2 mm
25%
3.03 kg / 6.69 pounds
3032.5 g / 29.7 N
3 mm
38%
4.55 kg / 10.03 pounds
4548.8 g / 44.6 N
5 mm
63%
7.58 kg / 16.71 pounds
7581.3 g / 74.4 N
10 mm
100%
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
11 mm
100%
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
12 mm
100%
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N

Table 5: Thermal stability (material behavior) - resistance threshold
MPL 30x10x8 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
OK
40 °C -2.2% 11.86 kg / 26.15 pounds
11863.1 g / 116.4 N
OK
60 °C -4.4% 11.60 kg / 25.57 pounds
11596.3 g / 113.8 N
80 °C -6.6% 11.33 kg / 24.98 pounds
11329.4 g / 111.1 N
100 °C -28.8% 8.64 kg / 19.04 pounds
8636.6 g / 84.7 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 30x10x8 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 33.78 kg / 74.46 pounds
5 382 Gs
5.07 kg / 11.17 pounds
5066 g / 49.7 N
N/A
1 mm 29.33 kg / 64.66 pounds
7 964 Gs
4.40 kg / 9.70 pounds
4399 g / 43.2 N
26.39 kg / 58.19 pounds
~0 Gs
2 mm 25.09 kg / 55.31 pounds
7 366 Gs
3.76 kg / 8.30 pounds
3763 g / 36.9 N
22.58 kg / 49.78 pounds
~0 Gs
3 mm 21.25 kg / 46.85 pounds
6 780 Gs
3.19 kg / 7.03 pounds
3188 g / 31.3 N
19.13 kg / 42.17 pounds
~0 Gs
5 mm 14.97 kg / 32.99 pounds
5 689 Gs
2.24 kg / 4.95 pounds
2245 g / 22.0 N
13.47 kg / 29.70 pounds
~0 Gs
10 mm 6.11 kg / 13.48 pounds
3 636 Gs
0.92 kg / 2.02 pounds
917 g / 9.0 N
5.50 kg / 12.13 pounds
~0 Gs
20 mm 1.26 kg / 2.78 pounds
1 651 Gs
0.19 kg / 0.42 pounds
189 g / 1.9 N
1.13 kg / 2.50 pounds
~0 Gs
50 mm 0.04 kg / 0.10 pounds
308 Gs
0.01 kg / 0.01 pounds
7 g / 0.1 N
0.04 kg / 0.09 pounds
~0 Gs
60 mm 0.02 kg / 0.04 pounds
203 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs
70 mm 0.01 kg / 0.02 pounds
140 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.01 pounds
100 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.01 pounds
74 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
56 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 30x10x8 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 9.5 cm
Hearing aid 10 Gs (1.0 mT) 7.5 cm
Timepiece 20 Gs (2.0 mT) 6.0 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Remote 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Impact energy (kinetic energy) - warning
MPL 30x10x8 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 26.78 km/h
(7.44 m/s)
0.50 J
30 mm 45.36 km/h
(12.60 m/s)
1.43 J
50 mm 58.54 km/h
(16.26 m/s)
2.38 J
100 mm 82.79 km/h
(23.00 m/s)
4.76 J

Table 9: Surface protection spec
MPL 30x10x8 / 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 30x10x8 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 138 Mx 121.4 µWb
Pc Coefficient 0.51 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 30x10x8 / N38

Environment Effective steel pull Effect
Air (land) 12.13 kg Standard
Water (riverbed) 13.89 kg
(+1.76 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Note: On a vertical surface, the magnet holds merely approx. 20-30% of its max power.

2. Steel saturation

*Thin steel (e.g. computer case) severely 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) = 0.51

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
Elemental analysis
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%
Environmental data
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: 020139-2026
Measurement Calculator
Magnet pull force

Magnetic Field

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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 30x10x8 mm and a weight of 18 g, guarantees the highest quality connection. As a block magnet with high power (approx. 12.13 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 shifting 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 30x10x8 / 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.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 12.13 kg), they are ideal as hidden locks 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.
For mounting flat magnets MPL 30x10x8 / N38, we recommend utilizing strong epoxy glues (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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
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 (30x10 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 30 mm (length), 10 mm (width), and 8 mm (thickness). It is a magnetic block with dimensions 30x10x8 mm and a self-weight of 18 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • Their strength remains stable, and after approximately 10 years it drops only by ~1% (according to research),
  • They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
  • Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an visually attractive appearance,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of individual machining as well as optimizing to specific applications,
  • Versatile presence in modern technologies – they are utilized in hard drives, electromotive mechanisms, medical devices, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in small systems

Cons

Characteristics of disadvantages of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of producing nuts in the magnet and complex shapes - preferred is casing - 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, tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum magnetic pulling forcewhat it depends on?

The force parameter is a measurement result conducted under specific, ideal conditions:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with an polished touching surface
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • in temp. approx. 20°C

What influences lifting capacity in practice

In practice, the actual holding force results from a number of factors, listed from crucial:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate reduces the holding force.

Warnings
Bone fractures

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Demagnetization risk

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Keep away from children

These products are not suitable for play. Swallowing several magnets can lead to them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.

Data carriers

Avoid bringing magnets near a wallet, laptop, or screen. The magnetism can destroy these devices and erase data from cards.

Fire risk

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Immense force

Handle with care. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can react.

Protective goggles

Neodymium magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them cracking into small pieces.

Compass and GPS

GPS units and mobile phones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.

Avoid contact if allergic

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness occurs, immediately stop handling magnets and use protective gear.

Life threat

People with a pacemaker must keep an safe separation from magnets. The magnetic field can interfere with the functioning of the implant.

Security! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98