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MPL 30x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020138

GTIN/EAN: 5906301811442

5.00

length

30 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.25 g

Magnetization Direction

↑ axial

Load capacity

8.89 kg / 87.23 N

Magnetic Induction

329.52 mT / 3295 Gs

Coating

[NiCuNi] Nickel

4.26 with VAT / pcs + price for transport

3.46 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical of the product - MPL 30x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 30x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020138
GTIN/EAN 5906301811442
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 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 11.25 g
Magnetization Direction ↑ axial
Load capacity ~ ? 8.89 kg / 87.23 N
Magnetic Induction ~ ? 329.52 mT / 3295 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x10x5 / 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

Physical simulation of the magnet - technical parameters

Presented data represent the direct effect of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MPL 30x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3294 Gs
329.4 mT
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
warning
1 mm 2866 Gs
286.6 mT
6.73 kg / 14.84 pounds
6731.1 g / 66.0 N
warning
2 mm 2424 Gs
242.4 mT
4.82 kg / 10.62 pounds
4816.4 g / 47.2 N
warning
3 mm 2022 Gs
202.2 mT
3.35 kg / 7.38 pounds
3349.6 g / 32.9 N
warning
5 mm 1397 Gs
139.7 mT
1.60 kg / 3.53 pounds
1600.3 g / 15.7 N
safe
10 mm 615 Gs
61.5 mT
0.31 kg / 0.68 pounds
309.8 g / 3.0 N
safe
15 mm 314 Gs
31.4 mT
0.08 kg / 0.18 pounds
80.6 g / 0.8 N
safe
20 mm 177 Gs
17.7 mT
0.03 kg / 0.06 pounds
25.8 g / 0.3 N
safe
30 mm 70 Gs
7.0 mT
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
safe
50 mm 19 Gs
1.9 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
safe

Table 2: Slippage load (wall)
MPL 30x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
1 mm Stal (~0.2) 1.35 kg / 2.97 pounds
1346.0 g / 13.2 N
2 mm Stal (~0.2) 0.96 kg / 2.13 pounds
964.0 g / 9.5 N
3 mm Stal (~0.2) 0.67 kg / 1.48 pounds
670.0 g / 6.6 N
5 mm Stal (~0.2) 0.32 kg / 0.71 pounds
320.0 g / 3.1 N
10 mm Stal (~0.2) 0.06 kg / 0.14 pounds
62.0 g / 0.6 N
15 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
20 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MPL 30x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.67 kg / 5.88 pounds
2667.0 g / 26.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N

Table 4: Steel thickness (saturation) - power losses
MPL 30x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
1 mm
25%
2.22 kg / 4.90 pounds
2222.5 g / 21.8 N
2 mm
50%
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
3 mm
75%
6.67 kg / 14.70 pounds
6667.5 g / 65.4 N
5 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
10 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
11 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
12 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N

Table 5: Thermal resistance (stability) - thermal limit
MPL 30x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
OK
40 °C -2.2% 8.69 kg / 19.17 pounds
8694.4 g / 85.3 N
OK
60 °C -4.4% 8.50 kg / 18.74 pounds
8498.8 g / 83.4 N
80 °C -6.6% 8.30 kg / 18.31 pounds
8303.3 g / 81.5 N
100 °C -28.8% 6.33 kg / 13.95 pounds
6329.7 g / 62.1 N

Table 6: Two magnets (attraction) - forces in the system
MPL 30x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 20.06 kg / 44.23 pounds
4 689 Gs
3.01 kg / 6.63 pounds
3010 g / 29.5 N
N/A
1 mm 17.63 kg / 38.86 pounds
6 174 Gs
2.64 kg / 5.83 pounds
2644 g / 25.9 N
15.86 kg / 34.98 pounds
~0 Gs
2 mm 15.19 kg / 33.49 pounds
5 732 Gs
2.28 kg / 5.02 pounds
2279 g / 22.4 N
13.67 kg / 30.14 pounds
~0 Gs
3 mm 12.92 kg / 28.47 pounds
5 285 Gs
1.94 kg / 4.27 pounds
1937 g / 19.0 N
11.62 kg / 25.63 pounds
~0 Gs
5 mm 9.08 kg / 20.03 pounds
4 432 Gs
1.36 kg / 3.00 pounds
1363 g / 13.4 N
8.18 kg / 18.02 pounds
~0 Gs
10 mm 3.61 kg / 7.96 pounds
2 795 Gs
0.54 kg / 1.19 pounds
542 g / 5.3 N
3.25 kg / 7.17 pounds
~0 Gs
20 mm 0.70 kg / 1.54 pounds
1 230 Gs
0.10 kg / 0.23 pounds
105 g / 1.0 N
0.63 kg / 1.39 pounds
~0 Gs
50 mm 0.02 kg / 0.05 pounds
217 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs
60 mm 0.01 kg / 0.02 pounds
141 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
96 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
68 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
50 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
38 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (implants) - warnings
MPL 30x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Mechanical watch 20 Gs (2.0 mT) 5.0 cm
Mobile device 40 Gs (4.0 mT) 4.0 cm
Remote 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Impact energy (kinetic energy) - collision effects
MPL 30x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.96 km/h
(8.04 m/s)
0.36 J
30 mm 49.12 km/h
(13.64 m/s)
1.05 J
50 mm 63.39 km/h
(17.61 m/s)
1.74 J
100 mm 89.65 km/h
(24.90 m/s)
3.49 J

Table 9: Corrosion resistance
MPL 30x10x5 / 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 (Flux)
MPL 30x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 9 370 Mx 93.7 µWb
Pc Coefficient 0.35 Low (Flat)

Table 11: Submerged application
MPL 30x10x5 / N38

Environment Effective steel pull Effect
Air (land) 8.89 kg Standard
Water (riverbed) 10.18 kg
(+1.29 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35

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 specification and ecology
Chemical composition
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: 020138-2026
Measurement Calculator
Force (pull)

Field Strength

Other proposals

This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 30x10x5 mm and a weight of 11.25 g, guarantees premium class connection. This rectangular block with a force of 87.23 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 block 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 8.89 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. 8.89 kg), they are ideal as closers 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 30x10x5 / N38, it is best to use 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. In practice, this means that this magnet has the greatest attraction force on its main planes (30x10 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 30x10x5 mm, which, at a weight of 11.25 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 8.89 kg (force ~87.23 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • Their magnetic field is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
  • Neodymium magnets are highly resistant to magnetic field loss caused by magnetic disturbances,
  • In other words, due to the smooth surface of silver, the element becomes visually attractive,
  • Magnetic induction on the top side of the magnet remains strong,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in constructing and the ability to modify to complex applications,
  • Huge importance in electronics industry – they serve a role in data components, brushless drives, advanced medical instruments, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Due to limitations in producing threads and complex shapes in magnets, we propose using cover - magnetic mount.
  • Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these products can be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat affects it?

Information about lifting capacity was determined for the most favorable conditions, including:
  • using a sheet made of mild steel, acting as a magnetic yoke
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • characterized by even structure
  • without the slightest air gap between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

Bear in mind that the application force will differ subject to the following factors, starting with the most relevant:
  • Air gap (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Cards and drives

Device Safety: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Flammability

Machining of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Avoid contact if allergic

Some people experience a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to an allergic reaction. It is best to wear protective gloves.

Handling guide

Use magnets consciously. Their powerful strength can surprise even professionals. Stay alert and do not underestimate their power.

No play value

Strictly store magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.

Phone sensors

Note: rare earth magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, device, and navigation systems.

Crushing force

Protect your hands. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Heat sensitivity

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Danger to pacemakers

Warning for patients: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Beware of splinters

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Attention! 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