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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

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Technical of the product - 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 simulation of the product - technical parameters

These data represent the result of a mathematical simulation. Results were calculated on models for the material Nd2Fe14B. Real-world performance may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull 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
critical level
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
safe
15 mm 431 Gs
43.1 mT
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
safe
20 mm 248 Gs
24.8 mT
0.04 kg / 0.09 pounds
41.0 g / 0.4 N
safe
30 mm 101 Gs
10.1 mT
0.01 kg / 0.02 pounds
6.8 g / 0.1 N
safe
50 mm 28 Gs
2.8 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
safe

Table 2: Sliding 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 (shearing) - 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: Material efficiency (substrate influence) - 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: Working in heat (material behavior) - power drop
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: Two magnets (attraction) - forces in the system
MPL 30x10x8 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (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: Safety (HSE) (electronics) - warnings
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
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Car key 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: Dynamics (cracking risk) - 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: Coating parameters (durability)
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 (Pc)
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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly reduces 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
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%
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
Magnet Unit Converter
Pulling force

Field Strength

Other deals

Model MPL 30x10x8 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 119.04 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 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 care, 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 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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 30x10x8 / 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. 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. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. 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: 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 protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even during around 10 years – the decrease in power is only ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by external field influence,
  • By using a shiny layer of nickel, the element gains an elegant look,
  • Magnets possess huge magnetic induction on the outer side,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
  • Thanks to modularity in shaping and the ability to modify to unusual requirements,
  • Versatile presence in modern technologies – they are commonly used in HDD drives, motor assemblies, medical devices, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions

Disadvantages

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 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 magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of making nuts in the magnet and complex forms - preferred is a housing - mounting mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Lifting parameters

Maximum lifting capacity of the magnetwhat it depends on?

Holding force of 12.13 kg is a result of laboratory testing executed under specific, ideal conditions:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section of at least 10 mm
  • with a plane perfectly flat
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

Key elements affecting lifting force

Holding efficiency impacted by specific conditions, mainly (from priority):
  • Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel type – mild steel gives the best results. Higher carbon content lower magnetic permeability and holding force.
  • Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Safety rules for work with neodymium magnets
Flammability

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Physical harm

Big blocks can smash fingers instantly. Never put your hand betwixt two attracting surfaces.

Operating temperature

Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Threat to navigation

Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.

Cards and drives

Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Skin irritation risks

Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, prevent direct skin contact or opt for encased magnets.

Handling rules

Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can react.

Implant safety

Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

No play value

Product intended for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.

Eye protection

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Attention! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98