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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

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Technical parameters - 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

Physical simulation of the assembly - data

Presented values constitute the direct effect of a mathematical analysis. Results were calculated on models for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Please consider these calculations as a reference point when designing systems.

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

Table 2: Vertical hold (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: Wall mounting (sliding) - 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 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: 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 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: Working in heat (stability) - power drop
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) - forces in the system
MPL 30x15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (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: Hazards (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
Timepiece 20 Gs (2.0 mT) 4.5 cm
Mobile device 40 Gs (4.0 mT) 3.5 cm
Car key 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: Collisions (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: 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: Electrical 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: Submerged application
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Steel thickness impact

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

3. Power loss vs temp

*For standard magnets, the critical 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
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%
Ecology and recycling (GPSR)
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
Force (pull)

Field Strength

Check out also offers

Model MPL 30x15x2 / N38 features a flat shape and professional pulling force, making it a perfect 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. 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. 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 hanging tools 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease 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. 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), 15 mm (width), and 2 mm (thickness). The key parameter here is the holding force amounting to approximately 2.11 kg (force ~20.74 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose power, even after around 10 years – the decrease in power is only ~1% (based on measurements),
  • Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
  • In other words, due to the shiny layer of gold, the element is aesthetically pleasing,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of custom shaping and adapting to individual needs,
  • Wide application in modern industrial fields – they are utilized in hard drives, electric motors, precision medical tools, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose strength 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
  • When exposed to humidity, magnets usually 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 threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these devices can disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

The force parameter is a theoretical maximum value performed under the following configuration:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • with an polished touching surface
  • with direct contact (without impurities)
  • during pulling in a direction vertical to the mounting surface
  • in stable room temperature

What influences lifting capacity in practice

In real-world applications, the actual lifting capacity depends on a number of factors, ranked from most significant:
  • Distance (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets
Heat warning

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

Data carriers

Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop handling magnets and use protective gear.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets leads to them cracking into shards.

Life threat

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

GPS and phone interference

A powerful magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Hand protection

Large magnets can break fingers instantly. Do not place your hand betwixt two strong magnets.

This is not a toy

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of kids and pets.

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Handling guide

Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can move away.

Caution! Learn more 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