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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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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

Technical simulation of the magnet - report

Presented values represent the direct effect of a physical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Actual performance might slightly differ. Use these data as a reference point when designing systems.

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

Table 2: Sliding 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 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) - 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: Thermal stability (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 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 range
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 (electronics) - 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: 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: Electrical 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: 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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

*Note: On a vertical wall, the magnet holds only approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 material, 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

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
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
Magnet pull force

Magnetic Induction

Other deals

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 30x15x2 mm and a weight of 6.75 g, guarantees the highest quality connection. As a magnetic bar with high power (approx. 2.11 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, 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. 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.
They constitute a key element in the production of generators and material handling systems. They work great as invisible mounts 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. 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 high 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 and disadvantages of Nd2Fe14B magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • They are noted for resistance to demagnetization induced by external field influence,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the surface of the magnet remains very high,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of individual machining as well as adjusting to individual requirements,
  • Universal use in innovative solutions – they serve a role in magnetic memories, motor assemblies, medical devices, and modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating nuts in the magnet and complex forms - recommended is a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what affects it?

Breakaway force is the result of a measurement for the most favorable conditions, including:
  • with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • whose transverse dimension equals approx. 10 mm
  • with an ground contact surface
  • without any air gap between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Magnet lifting force in use – key factors

Bear in mind that the application force will differ subject to elements below, in order of importance:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost to the other side.
  • Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.

Warnings
Finger safety

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

Beware of splinters

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Handling guide

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

Threat to navigation

A powerful magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.

Warning for heart patients

Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Choking Hazard

These products are not suitable for play. Accidental ingestion of several magnets can lead to them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.

Flammability

Powder created during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Cards and drives

Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Avoid contact if allergic

It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, avoid touching magnets with bare hands or opt for versions in plastic housing.

Heat sensitivity

Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Warning! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98