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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 / 20.74 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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Detailed specification - 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 / 20.74 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 product - data

Presented information constitute the outcome of a engineering simulation. Values are based on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ. Use these calculations as a preliminary roadmap when designing systems.

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

Table 2: Slippage capacity (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) - behavior on slippery surfaces
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 (substrate influence) - 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) - thermal limit
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) - field range
MPL 30x15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (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 (implants) - warnings
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
Timepiece 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: Impact energy (kinetic energy) - 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: Coating parameters (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 (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%
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

*Warning: On a vertical wall, the magnet retains only a fraction of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Power loss vs temp

*For N38 grade, 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 and environmental data
Chemical composition
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

Field Strength

Other deals

Component MPL 30x15x2 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 2.11 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
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 hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 30x15x2 / 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. 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 through the thickness (dimension 2 mm), which means that the N and S poles are located on its largest, flat surfaces. 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), 15 mm (width), and 2 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 2.11 kg (force ~20.74 N), which, with such a compact shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Pros and cons of neodymium magnets.

Advantages

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets remain remarkably resistant to demagnetization caused by external interference,
  • Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver gives an professional appearance,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
  • Considering the possibility of precise molding and customization to unique needs, neodymium magnets can be modeled in a broad palette of shapes and sizes, which makes them more universal,
  • Fundamental importance in modern industrial fields – they are commonly used in data components, motor assemblies, advanced medical instruments, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Magnetic strength at its maximum – what it depends on?

The lifting capacity listed is a measurement result executed under the following configuration:
  • using a sheet made of high-permeability steel, serving as a ideal flux conductor
  • possessing a massiveness of min. 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction perpendicular to the mounting surface
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

In practice, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
  • Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets
Warning for heart patients

Individuals with a pacemaker must maintain an safe separation from magnets. The magnetic field can stop the functioning of the implant.

Demagnetization risk

Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Magnetic interference

An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.

Powerful field

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Dust is flammable

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Crushing risk

Big blocks can break fingers instantly. Under no circumstances put your hand betwixt two strong magnets.

Swallowing risk

Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep away from children and animals.

Allergic reactions

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent direct skin contact and choose versions in plastic housing.

Cards and drives

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

Magnet fragility

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

Caution! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98