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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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Specifications and structure of a magnet can be verified on our force calculator.

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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 / 20.74 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

Engineering analysis of the product - report

Presented values are the direct effect of a mathematical simulation. Results rely on models for the class Nd2Fe14B. Operational parameters may differ. Treat these data as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - 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 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 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 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: Material efficiency (substrate influence) - sheet metal selection
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) - 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 (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 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: Protective zones (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
Mobile device 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: 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 (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: Physics of underwater searching
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 grade, 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%
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: 020140-2025
Quick Unit Converter
Force (pull)

Magnetic Field

Other offers

Component MPL 30x15x2 / N38 features a low profile and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar 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 protects 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 extreme caution, 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 filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 30x15x2 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 30x15x2 mm, which, at a weight of 6.75 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 30x15x2 mm and a self-weight of 6.75 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of neodymium magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain full power for around 10 years – the loss is just ~1% (based on simulations),
  • They maintain their magnetic properties even under close interference source,
  • By using a shiny layer of nickel, the element has an proper look,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Possibility of detailed creating and adjusting to specific requirements,
  • Huge importance in advanced technology sectors – they find application in computer drives, motor assemblies, diagnostic systems, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • 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 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited ability of making threads in the magnet and complicated forms - preferred is cover - magnet mounting.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

The specified lifting capacity concerns the limit force, recorded under laboratory conditions, meaning:
  • on a block made of structural steel, optimally conducting the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • with an ground touching surface
  • under conditions of no distance (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, including (from most important):
  • Distance (betwixt the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

H&S for magnets
Safe distance

Do not bring magnets near a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease handling magnets and wear gloves.

Life threat

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.

Do not drill into magnets

Powder generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Do not give to children

Strictly keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are very dangerous.

GPS Danger

A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a device to avoid damaging the sensors.

Finger safety

Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Safe operation

Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.

Magnets are brittle

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Permanent damage

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

Attention! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98