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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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Force as well as appearance of a neodymium magnet can be tested on our modular calculator.

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Technical - 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 analysis of the assembly - report

These values constitute the direct effect of a engineering calculation. Results are based on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - 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 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
strong
5 mm 2321 Gs
232.1 mT
5.31 kg / 11.71 lbs
5309.9 g / 52.1 N
strong
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: Sliding 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: Wall mounting (sliding) - 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: Steel thickness (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 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: 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 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: Two magnets (repulsion) - field collision
MPL 30x15x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Hazards (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
Mobile device 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 (kinetic energy) - 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: 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: 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: Underwater work (magnet fishing)
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Warning: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens 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.

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%
Environmental data
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
Magnet Unit Converter
Force (pull)

Magnetic Field

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This product is a very powerful 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. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 16.84 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. 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. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
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.
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 lifting capacity 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.

Pros as well as cons of neodymium magnets.

Benefits

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Neodymium magnets prove to be highly resistant to magnetic field loss caused by external field sources,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to modularity in constructing and the capacity to customize to client solutions,
  • Universal use in high-tech industry – they are used in computer drives, drive modules, diagnostic systems, also complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic holder.
  • Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat it depends on?

Holding force of 16.84 kg is a theoretical maximum value conducted under the following configuration:
  • with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
  • with a cross-section minimum 10 mm
  • with an ground touching surface
  • without the slightest insulating layer between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • in neutral thermal conditions

Lifting capacity in real conditions – factors

In practice, the actual holding force results from several key aspects, ranked from most significant:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface finish – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature influence – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Warnings
Life threat

For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Keep away from children

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep away from kids and pets.

Immense force

Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Electronic devices

Avoid bringing magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Bodily injuries

Mind your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing anything in their path. Be careful!

Skin irritation risks

Studies show that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact and opt for coated magnets.

Heat warning

Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Fragile material

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets will cause them cracking into small pieces.

Keep away from electronics

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Mechanical processing

Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.

Safety First! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98