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MPL 30x15x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020389

GTIN/EAN: 5906301811886

5.00

length

30 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

33.75 g

Magnetization Direction

↑ axial

Load capacity

16.84 kg / 165.22 N

Magnetic Induction

413.45 mT / 4135 Gs

Coating

[NiCuNi] Nickel

24.48 with VAT / pcs + price for transport

19.90 ZŁ net + 23% VAT / pcs

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Product card - MPL 30x15x10 / N38 - lamellar magnet

Specification / characteristics - MPL 30x15x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020389
GTIN/EAN 5906301811886
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 10 mm [±0,1 mm]
Weight 33.75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 16.84 kg / 165.22 N
Magnetic Induction ~ ? 413.45 mT / 4135 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x15x10 / 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 modeling of the assembly - data

The following values are the direct effect of a mathematical simulation. Results are based on models for the class Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MPL 30x15x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4133 Gs
413.3 mT
16.84 kg / 37.13 pounds
16840.0 g / 165.2 N
crushing
1 mm 3754 Gs
375.4 mT
13.89 kg / 30.62 pounds
13889.5 g / 136.3 N
crushing
2 mm 3365 Gs
336.5 mT
11.16 kg / 24.60 pounds
11159.2 g / 109.5 N
crushing
3 mm 2988 Gs
298.8 mT
8.80 kg / 19.41 pounds
8803.6 g / 86.4 N
medium risk
5 mm 2321 Gs
232.1 mT
5.31 kg / 11.71 pounds
5309.9 g / 52.1 N
medium risk
10 mm 1225 Gs
122.5 mT
1.48 kg / 3.26 pounds
1480.1 g / 14.5 N
safe
15 mm 684 Gs
68.4 mT
0.46 kg / 1.02 pounds
461.6 g / 4.5 N
safe
20 mm 409 Gs
40.9 mT
0.16 kg / 0.36 pounds
164.8 g / 1.6 N
safe
30 mm 173 Gs
17.3 mT
0.03 kg / 0.07 pounds
29.6 g / 0.3 N
safe
50 mm 50 Gs
5.0 mT
0.00 kg / 0.01 pounds
2.4 g / 0.0 N
safe

Table 2: Slippage force (wall)
MPL 30x15x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.37 kg / 7.43 pounds
3368.0 g / 33.0 N
1 mm Stal (~0.2) 2.78 kg / 6.12 pounds
2778.0 g / 27.3 N
2 mm Stal (~0.2) 2.23 kg / 4.92 pounds
2232.0 g / 21.9 N
3 mm Stal (~0.2) 1.76 kg / 3.88 pounds
1760.0 g / 17.3 N
5 mm Stal (~0.2) 1.06 kg / 2.34 pounds
1062.0 g / 10.4 N
10 mm Stal (~0.2) 0.30 kg / 0.65 pounds
296.0 g / 2.9 N
15 mm Stal (~0.2) 0.09 kg / 0.20 pounds
92.0 g / 0.9 N
20 mm Stal (~0.2) 0.03 kg / 0.07 pounds
32.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 30x15x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.05 kg / 11.14 pounds
5052.0 g / 49.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.37 kg / 7.43 pounds
3368.0 g / 33.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.68 kg / 3.71 pounds
1684.0 g / 16.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
8.42 kg / 18.56 pounds
8420.0 g / 82.6 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 30x15x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.84 kg / 1.86 pounds
842.0 g / 8.3 N
1 mm
13%
2.11 kg / 4.64 pounds
2105.0 g / 20.7 N
2 mm
25%
4.21 kg / 9.28 pounds
4210.0 g / 41.3 N
3 mm
38%
6.31 kg / 13.92 pounds
6315.0 g / 62.0 N
5 mm
63%
10.53 kg / 23.20 pounds
10525.0 g / 103.3 N
10 mm
100%
16.84 kg / 37.13 pounds
16840.0 g / 165.2 N
11 mm
100%
16.84 kg / 37.13 pounds
16840.0 g / 165.2 N
12 mm
100%
16.84 kg / 37.13 pounds
16840.0 g / 165.2 N

Table 5: Working in heat (material behavior) - resistance threshold
MPL 30x15x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 16.84 kg / 37.13 pounds
16840.0 g / 165.2 N
OK
40 °C -2.2% 16.47 kg / 36.31 pounds
16469.5 g / 161.6 N
OK
60 °C -4.4% 16.10 kg / 35.49 pounds
16099.0 g / 157.9 N
80 °C -6.6% 15.73 kg / 34.68 pounds
15728.6 g / 154.3 N
100 °C -28.8% 11.99 kg / 26.43 pounds
11990.1 g / 117.6 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 30x15x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 47.39 kg / 104.48 pounds
5 357 Gs
7.11 kg / 15.67 pounds
7109 g / 69.7 N
N/A
1 mm 43.23 kg / 95.30 pounds
7 895 Gs
6.48 kg / 14.29 pounds
6484 g / 63.6 N
38.90 kg / 85.77 pounds
~0 Gs
2 mm 39.09 kg / 86.17 pounds
7 507 Gs
5.86 kg / 12.93 pounds
5863 g / 57.5 N
35.18 kg / 77.56 pounds
~0 Gs
3 mm 35.13 kg / 77.45 pounds
7 117 Gs
5.27 kg / 11.62 pounds
5270 g / 51.7 N
31.62 kg / 69.70 pounds
~0 Gs
5 mm 27.95 kg / 61.61 pounds
6 348 Gs
4.19 kg / 9.24 pounds
4192 g / 41.1 N
25.15 kg / 55.45 pounds
~0 Gs
10 mm 14.94 kg / 32.94 pounds
4 642 Gs
2.24 kg / 4.94 pounds
2242 g / 22.0 N
13.45 kg / 29.65 pounds
~0 Gs
20 mm 4.17 kg / 9.18 pounds
2 451 Gs
0.62 kg / 1.38 pounds
625 g / 6.1 N
3.75 kg / 8.26 pounds
~0 Gs
50 mm 0.19 kg / 0.41 pounds
519 Gs
0.03 kg / 0.06 pounds
28 g / 0.3 N
0.17 kg / 0.37 pounds
~0 Gs
60 mm 0.08 kg / 0.18 pounds
347 Gs
0.01 kg / 0.03 pounds
13 g / 0.1 N
0.08 kg / 0.17 pounds
~0 Gs
70 mm 0.04 kg / 0.09 pounds
242 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.04 kg / 0.08 pounds
~0 Gs
80 mm 0.02 kg / 0.05 pounds
175 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs
90 mm 0.01 kg / 0.03 pounds
130 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.02 pounds
~0 Gs
100 mm 0.01 kg / 0.02 pounds
99 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - warnings
MPL 30x15x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 12.0 cm
Hearing aid 10 Gs (1.0 mT) 9.5 cm
Mechanical watch 20 Gs (2.0 mT) 7.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.5 cm
Car key 50 Gs (5.0 mT) 5.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm

Table 8: Dynamics (cracking risk) - collision effects
MPL 30x15x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.73 km/h
(6.59 m/s)
0.73 J
30 mm 39.06 km/h
(10.85 m/s)
1.99 J
50 mm 50.38 km/h
(13.99 m/s)
3.30 J
100 mm 71.24 km/h
(19.79 m/s)
6.61 J

Table 9: Corrosion resistance
MPL 30x15x10 / 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 30x15x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 18 390 Mx 183.9 µWb
Pc Coefficient 0.52 Low (Flat)

Table 11: Submerged application
MPL 30x15x10 / N38

Environment Effective steel pull Effect
Air (land) 16.84 kg Standard
Water (riverbed) 19.28 kg
(+2.44 kg buoyancy gain)
+14.5%
Rust risk: 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 surface, the magnet retains only a fraction of its max power.

2. Steel thickness impact

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

3. Heat tolerance

*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) = 0.52

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.

Technical and environmental data
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: 020389-2026
Measurement Calculator
Magnet pull force

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Component MPL 30x15x10 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 16.84 kg), this product is available immediately from our warehouse in Poland. 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. To separate the MPL 30x15x10 / 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. 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 wind generators and material handling systems. Thanks to the flat surface and high force (approx. 16.84 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 30x15x10 / N38, it is best to use strong epoxy glues (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. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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 10 mm (thickness). The key parameter here is the holding force amounting to approximately 16.84 kg (force ~165.22 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Besides their high retention, neodymium magnets are valued for these benefits:
  • They do not lose power, even after nearly 10 years – the reduction in strength is only ~1% (according to tests),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external interference,
  • The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in designing and the capacity to modify to client solutions,
  • Significant place in modern technologies – they find application in mass storage devices, brushless drives, advanced medical instruments, as well as industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Limitations

Problematic aspects of neodymium magnets: application proposals
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating nuts and complicated shapes in magnets, we propose using a housing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat contributes to it?

The lifting capacity listed is a result of laboratory testing conducted under standard conditions:
  • with the use of a sheet made of special test steel, ensuring maximum field concentration
  • whose thickness reaches at least 10 mm
  • with an ideally smooth touching surface
  • without the slightest insulating layer between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Bear in mind that the application force may be lower subject to the following factors, starting with the most relevant:
  • Air gap (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin sheet does not accept the full field, causing part of the flux to be escaped into the air.
  • Material composition – not every steel attracts identically. Alloy additives weaken the attraction effect.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Impact on smartphones

A powerful magnetic field interferes with the operation of compasses in phones and GPS navigation. Keep magnets near a smartphone to prevent breaking the sensors.

Physical harm

Danger of trauma: The attraction force is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Thermal limits

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

Implant safety

Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to handle the magnets.

Respect the power

Use magnets consciously. Their powerful strength can shock even professionals. Plan your moves and do not underestimate their force.

Magnets are brittle

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

Fire risk

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Keep away from computers

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Nickel coating and allergies

A percentage of the population suffer from a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling might lead to skin redness. We suggest wear protective gloves.

Choking Hazard

Absolutely store magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are life-threatening.

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98