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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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Physical properties - 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

Technical modeling of the assembly - report

These information are the outcome of a engineering analysis. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - characteristics
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 LBS
16840.0 g / 165.2 N
critical level
1 mm 3754 Gs
375.4 mT
13.89 kg / 30.62 LBS
13889.5 g / 136.3 N
critical level
2 mm 3365 Gs
336.5 mT
11.16 kg / 24.60 LBS
11159.2 g / 109.5 N
critical level
3 mm 2988 Gs
298.8 mT
8.80 kg / 19.41 LBS
8803.6 g / 86.4 N
warning
5 mm 2321 Gs
232.1 mT
5.31 kg / 11.71 LBS
5309.9 g / 52.1 N
warning
10 mm 1225 Gs
122.5 mT
1.48 kg / 3.26 LBS
1480.1 g / 14.5 N
low risk
15 mm 684 Gs
68.4 mT
0.46 kg / 1.02 LBS
461.6 g / 4.5 N
low risk
20 mm 409 Gs
40.9 mT
0.16 kg / 0.36 LBS
164.8 g / 1.6 N
low risk
30 mm 173 Gs
17.3 mT
0.03 kg / 0.07 LBS
29.6 g / 0.3 N
low risk
50 mm 50 Gs
5.0 mT
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
low risk

Table 2: Shear capacity (wall)
MPL 30x15x10 / N38

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

Table 3: Vertical assembly (shearing) - vertical pull
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 LBS
5052.0 g / 49.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.37 kg / 7.43 LBS
3368.0 g / 33.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.68 kg / 3.71 LBS
1684.0 g / 16.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
8.42 kg / 18.56 LBS
8420.0 g / 82.6 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x15x10 / N38

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

Table 5: Thermal stability (stability) - 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 LBS
16840.0 g / 165.2 N
OK
40 °C -2.2% 16.47 kg / 36.31 LBS
16469.5 g / 161.6 N
OK
60 °C -4.4% 16.10 kg / 35.49 LBS
16099.0 g / 157.9 N
80 °C -6.6% 15.73 kg / 34.68 LBS
15728.6 g / 154.3 N
100 °C -28.8% 11.99 kg / 26.43 LBS
11990.1 g / 117.6 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 30x15x10 / N38

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

Table 7: Safety (HSE) (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
Remote 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: Impact energy (kinetic energy) - warning
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: Coating parameters (durability)
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: Electrical data (Pc)
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%
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. Shear force

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

2. Steel saturation

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

3. Thermal stability

*For N38 material, the safety limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.52

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.

Engineering data and GPSR
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
Pulling force

Magnetic Field

Other deals

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 30x15x10 mm and a weight of 33.75 g, guarantees premium class connection. This rectangular block with a force of 165.22 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. To separate the MPL 30x15x10 / 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 30x15x10 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 16.84 kg), they are ideal as closers 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, we recommend utilizing 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 clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 30x15x10 / N38 model is magnetized axially (dimension 10 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. 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 10 mm (thickness). It is a magnetic block with dimensions 30x15x10 mm and a self-weight of 33.75 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • Their magnetic field remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss when exposed to external fields,
  • Thanks to the shimmering finish, the surface of nickel, gold-plated, or silver gives an professional appearance,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in constructing and the capacity to modify to client solutions,
  • Wide application in future technologies – they serve a role in mass storage devices, motor assemblies, precision medical tools, as well as multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: application proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
  • NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 extremely resistant to heat
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complex shapes in magnets, we propose using cover - magnetic mount.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these magnets can be problematic in diagnostics 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

Maximum lifting force for a neodymium magnet – what affects it?

Holding force of 16.84 kg is a result of laboratory testing executed under specific, ideal conditions:
  • on a block made of mild steel, optimally conducting the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • characterized by smoothness
  • under conditions of ideal adhesion (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Bear in mind that the working load may be lower influenced by elements below, starting with the most relevant:
  • Distance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with neodymium magnets
Risk of cracking

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Life threat

Health Alert: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Protect data

Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Powerful field

Use magnets with awareness. Their huge power can shock even experienced users. Plan your moves and do not underestimate their force.

Bodily injuries

Danger of trauma: The attraction force is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Fire warning

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Swallowing risk

Adult use only. Tiny parts can be swallowed, causing severe trauma. Keep away from children and animals.

Thermal limits

Keep cool. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Threat to navigation

A strong magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Allergy Warning

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease working with magnets and use protective gear.

Safety First! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98