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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

Technical modeling of the magnet - data

The following values represent the direct effect of a mathematical calculation. Results rely on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
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 pounds
2110.0 g / 20.7 N
warning
1 mm 1098 Gs
109.8 mT
1.92 kg / 4.23 pounds
1920.5 g / 18.8 N
safe
2 mm 1019 Gs
101.9 mT
1.65 kg / 3.65 pounds
1654.9 g / 16.2 N
safe
3 mm 926 Gs
92.6 mT
1.37 kg / 3.01 pounds
1365.9 g / 13.4 N
safe
5 mm 733 Gs
73.3 mT
0.86 kg / 1.89 pounds
855.2 g / 8.4 N
safe
10 mm 379 Gs
37.9 mT
0.23 kg / 0.50 pounds
228.8 g / 2.2 N
safe
15 mm 203 Gs
20.3 mT
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
safe
20 mm 116 Gs
11.6 mT
0.02 kg / 0.05 pounds
21.6 g / 0.2 N
safe
30 mm 46 Gs
4.6 mT
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
safe
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
safe

Table 2: Vertical load (wall)
MPL 30x15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.42 kg / 0.93 pounds
422.0 g / 4.1 N
1 mm Stal (~0.2) 0.38 kg / 0.85 pounds
384.0 g / 3.8 N
2 mm Stal (~0.2) 0.33 kg / 0.73 pounds
330.0 g / 3.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 pounds
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.17 kg / 0.38 pounds
172.0 g / 1.7 N
10 mm Stal (~0.2) 0.05 kg / 0.10 pounds
46.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 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: Vertical assembly (shearing) - 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 pounds
633.0 g / 6.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.42 kg / 0.93 pounds
422.0 g / 4.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.21 kg / 0.47 pounds
211.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N

Table 4: Steel thickness (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 pounds
211.0 g / 2.1 N
1 mm
25%
0.53 kg / 1.16 pounds
527.5 g / 5.2 N
2 mm
50%
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N
3 mm
75%
1.58 kg / 3.49 pounds
1582.5 g / 15.5 N
5 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
10 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
11 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
12 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N

Table 5: Working in heat (stability) - 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 pounds
2110.0 g / 20.7 N
OK
40 °C -2.2% 2.06 kg / 4.55 pounds
2063.6 g / 20.2 N
OK
60 °C -4.4% 2.02 kg / 4.45 pounds
2017.2 g / 19.8 N
80 °C -6.6% 1.97 kg / 4.34 pounds
1970.7 g / 19.3 N
100 °C -28.8% 1.50 kg / 3.31 pounds
1502.3 g / 14.7 N

Table 6: Two magnets (attraction) - forces in the system
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 pounds
2 169 Gs
0.55 kg / 1.22 pounds
551 g / 5.4 N
N/A
1 mm 3.53 kg / 7.79 pounds
2 257 Gs
0.53 kg / 1.17 pounds
530 g / 5.2 N
3.18 kg / 7.01 pounds
~0 Gs
2 mm 3.34 kg / 7.37 pounds
2 196 Gs
0.50 kg / 1.11 pounds
502 g / 4.9 N
3.01 kg / 6.64 pounds
~0 Gs
3 mm 3.12 kg / 6.89 pounds
2 122 Gs
0.47 kg / 1.03 pounds
469 g / 4.6 N
2.81 kg / 6.20 pounds
~0 Gs
5 mm 2.63 kg / 5.80 pounds
1 948 Gs
0.39 kg / 0.87 pounds
395 g / 3.9 N
2.37 kg / 5.22 pounds
~0 Gs
10 mm 1.49 kg / 3.28 pounds
1 465 Gs
0.22 kg / 0.49 pounds
223 g / 2.2 N
1.34 kg / 2.96 pounds
~0 Gs
20 mm 0.40 kg / 0.88 pounds
758 Gs
0.06 kg / 0.13 pounds
60 g / 0.6 N
0.36 kg / 0.79 pounds
~0 Gs
50 mm 0.01 kg / 0.03 pounds
142 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs
60 mm 0.01 kg / 0.01 pounds
92 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
63 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
44 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
32 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
24 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (electronics) - 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 (kinetic energy) - warning
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: Corrosion resistance
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 (Pc)
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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

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

2. Steel saturation

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

3. Heat tolerance

*For N38 material, the safety limit is 80°C.

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

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

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
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%
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
Quick Unit Converter
Pulling force

Magnetic Field

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Component MPL 30x15x2 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 20.69 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 sliding 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. Watch your fingers! Magnets with a force of 2.11 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 30x15x2 / 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. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
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. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 30x15x2 / N38 model is magnetized axially (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 lifting capacity amounting to approximately 2.11 kg (force ~20.69 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of neodymium magnets.

Pros

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They retain their magnetic properties even under strong external field,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • The surface of neodymium magnets generates a unique 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...
  • In view of the option of flexible forming and adaptation to custom needs, magnetic components can be modeled in a variety of shapes and sizes, which expands the range of possible applications,
  • Versatile presence in future technologies – they serve a role in hard drives, electromotive mechanisms, medical equipment, also modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: application proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • 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 as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, tiny parts of these devices can complicate diagnosis medical after entering the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

Best holding force of the magnet in ideal parameterswhat contributes to it?

The specified lifting capacity concerns the peak performance, measured under laboratory conditions, namely:
  • using a sheet made of high-permeability steel, functioning as a circuit closing element
  • with a thickness minimum 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • under perpendicular force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force results from several key aspects, presented from the most important:
  • Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be lost into the air.
  • Plate material – mild steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.

H&S for magnets
Magnets are brittle

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Maximum temperature

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

Electronic hazard

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Do not underestimate power

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

This is not a toy

NdFeB magnets are not intended for children. Swallowing a few magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.

Keep away from electronics

Navigation devices and mobile phones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Crushing risk

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.

Machining danger

Drilling and cutting of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Health Danger

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Nickel coating and allergies

A percentage of the population have a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in a rash. We strongly advise use protective gloves.

Caution! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98