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MPL 30x15x2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020140

GTIN/EAN: 5906301811466

5.00

length

30 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

6.75 g

Magnetization Direction

↑ axial

Load capacity

2.11 kg / 20.69 N

Magnetic Induction

115.11 mT / 1151 Gs

Coating

[NiCuNi] Nickel

3.89 with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

bulk discounts:

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Physical properties - MPL 30x15x2 / N38 - lamellar magnet

Specification / characteristics - MPL 30x15x2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020140
GTIN/EAN 5906301811466
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 15 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 6.75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.11 kg / 20.69 N
Magnetic Induction ~ ? 115.11 mT / 1151 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x15x2 / 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 simulation of the magnet - technical parameters

The following values constitute the outcome of a mathematical analysis. Values are based on algorithms for the class Nd2Fe14B. Actual conditions may differ. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - power drop
MPL 30x15x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1151 Gs
115.1 mT
2.11 kg / 4.65 lbs
2110.0 g / 20.7 N
warning
1 mm 1098 Gs
109.8 mT
1.92 kg / 4.23 lbs
1920.5 g / 18.8 N
low risk
2 mm 1019 Gs
101.9 mT
1.65 kg / 3.65 lbs
1654.9 g / 16.2 N
low risk
3 mm 926 Gs
92.6 mT
1.37 kg / 3.01 lbs
1365.9 g / 13.4 N
low risk
5 mm 733 Gs
73.3 mT
0.86 kg / 1.89 lbs
855.2 g / 8.4 N
low risk
10 mm 379 Gs
37.9 mT
0.23 kg / 0.50 lbs
228.8 g / 2.2 N
low risk
15 mm 203 Gs
20.3 mT
0.07 kg / 0.14 lbs
65.6 g / 0.6 N
low risk
20 mm 116 Gs
11.6 mT
0.02 kg / 0.05 lbs
21.6 g / 0.2 N
low risk
30 mm 46 Gs
4.6 mT
0.00 kg / 0.01 lbs
3.4 g / 0.0 N
low risk
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
low risk

Table 2: Shear force (vertical surface)
MPL 30x15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.42 kg / 0.93 lbs
422.0 g / 4.1 N
1 mm Stal (~0.2) 0.38 kg / 0.85 lbs
384.0 g / 3.8 N
2 mm Stal (~0.2) 0.33 kg / 0.73 lbs
330.0 g / 3.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 lbs
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.17 kg / 0.38 lbs
172.0 g / 1.7 N
10 mm Stal (~0.2) 0.05 kg / 0.10 lbs
46.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 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 (sliding) - vertical pull
MPL 30x15x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.63 kg / 1.40 lbs
633.0 g / 6.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.42 kg / 0.93 lbs
422.0 g / 4.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.21 kg / 0.47 lbs
211.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.06 kg / 2.33 lbs
1055.0 g / 10.3 N

Table 4: Material efficiency (saturation) - power losses
MPL 30x15x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.21 kg / 0.47 lbs
211.0 g / 2.1 N
1 mm
25%
0.53 kg / 1.16 lbs
527.5 g / 5.2 N
2 mm
50%
1.06 kg / 2.33 lbs
1055.0 g / 10.3 N
3 mm
75%
1.58 kg / 3.49 lbs
1582.5 g / 15.5 N
5 mm
100%
2.11 kg / 4.65 lbs
2110.0 g / 20.7 N
10 mm
100%
2.11 kg / 4.65 lbs
2110.0 g / 20.7 N
11 mm
100%
2.11 kg / 4.65 lbs
2110.0 g / 20.7 N
12 mm
100%
2.11 kg / 4.65 lbs
2110.0 g / 20.7 N

Table 5: Thermal stability (material behavior) - resistance threshold
MPL 30x15x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.11 kg / 4.65 lbs
2110.0 g / 20.7 N
OK
40 °C -2.2% 2.06 kg / 4.55 lbs
2063.6 g / 20.2 N
OK
60 °C -4.4% 2.02 kg / 4.45 lbs
2017.2 g / 19.8 N
80 °C -6.6% 1.97 kg / 4.34 lbs
1970.7 g / 19.3 N
100 °C -28.8% 1.50 kg / 3.31 lbs
1502.3 g / 14.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 30x15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.67 kg / 8.10 lbs
2 169 Gs
0.55 kg / 1.22 lbs
551 g / 5.4 N
N/A
1 mm 3.53 kg / 7.79 lbs
2 257 Gs
0.53 kg / 1.17 lbs
530 g / 5.2 N
3.18 kg / 7.01 lbs
~0 Gs
2 mm 3.34 kg / 7.37 lbs
2 196 Gs
0.50 kg / 1.11 lbs
502 g / 4.9 N
3.01 kg / 6.64 lbs
~0 Gs
3 mm 3.12 kg / 6.89 lbs
2 122 Gs
0.47 kg / 1.03 lbs
469 g / 4.6 N
2.81 kg / 6.20 lbs
~0 Gs
5 mm 2.63 kg / 5.80 lbs
1 948 Gs
0.39 kg / 0.87 lbs
395 g / 3.9 N
2.37 kg / 5.22 lbs
~0 Gs
10 mm 1.49 kg / 3.28 lbs
1 465 Gs
0.22 kg / 0.49 lbs
223 g / 2.2 N
1.34 kg / 2.96 lbs
~0 Gs
20 mm 0.40 kg / 0.88 lbs
758 Gs
0.06 kg / 0.13 lbs
60 g / 0.6 N
0.36 kg / 0.79 lbs
~0 Gs
50 mm 0.01 kg / 0.03 lbs
142 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs
60 mm 0.01 kg / 0.01 lbs
92 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.01 lbs
63 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
44 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
32 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
24 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 30x15x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MPL 30x15x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.00 km/h
(5.28 m/s)
0.09 J
30 mm 30.91 km/h
(8.59 m/s)
0.25 J
50 mm 39.87 km/h
(11.08 m/s)
0.41 J
100 mm 56.39 km/h
(15.66 m/s)
0.83 J

Table 9: Anti-corrosion coating durability
MPL 30x15x2 / 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 30x15x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 236 Mx 62.4 µWb
Pc Coefficient 0.13 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 30x15x2 / N38

Environment Effective steel pull Effect
Air (land) 2.11 kg Standard
Water (riverbed) 2.42 kg
(+0.31 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. Shear force

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Temperature resistance

*For standard magnets, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13

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.

Engineering data and GPSR
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: 020140-2026
Magnet Unit Converter
Pulling force

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Check out also offers

Model MPL 30x15x2 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 20.74 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 30x15x2 / 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 generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. 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).
Standardly, the MPL 30x15x2 / N38 model is magnetized through the thickness (dimension 2 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (30x15 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 30x15x2 mm, which, at a weight of 6.75 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 2.11 kg (force ~20.74 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • Their power is durable, and after around 10 years it drops only by ~1% (theoretically),
  • Neodymium magnets are distinguished by remarkably resistant to magnetic field loss caused by external magnetic fields,
  • Thanks to the shiny finish, the coating of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
  • Magnets are characterized by very high magnetic induction on the working surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • In view of the possibility of precise forming and customization to individualized needs, neodymium magnets can be manufactured in a broad palette of geometric configurations, which makes them more universal,
  • Significant place in modern industrial fields – they are utilized in computer drives, electric motors, medical devices, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Cons of neodymium magnets: tips and applications.
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited possibility of creating nuts in the magnet and complicated shapes - preferred is cover - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum lifting capacity of the magnetwhat affects it?

Information about lifting capacity was defined for ideal contact conditions, including:
  • using a plate made of low-carbon steel, acting as a ideal flux conductor
  • with a cross-section minimum 10 mm
  • with an polished contact surface
  • under conditions of no distance (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • in stable room temperature

Practical aspects of lifting capacity – factors

Holding efficiency impacted by specific conditions, mainly (from most important):
  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Plate material – mild steel attracts best. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.

Safe handling of NdFeB magnets
Life threat

People with a ICD have to keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands and choose encased magnets.

Operating temperature

Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

This is not a toy

Product intended for adults. Small elements can be swallowed, leading to serious injuries. Keep away from children and animals.

Fragile material

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into shards.

Physical harm

Big blocks can crush fingers instantly. Do not put your hand between two attracting surfaces.

Magnetic interference

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Machining danger

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Handling rules

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Protect data

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Attention! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98