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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

bulk discounts:

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Technical of the product - 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 simulation of the product - data

Presented information are the result of a mathematical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may deviate from the simulation results. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - 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 pounds
16840.0 g / 165.2 N
critical level
1 mm 3754 Gs
375.4 mT
13.89 kg / 30.62 pounds
13889.5 g / 136.3 N
critical level
2 mm 3365 Gs
336.5 mT
11.16 kg / 24.60 pounds
11159.2 g / 109.5 N
critical level
3 mm 2988 Gs
298.8 mT
8.80 kg / 19.41 pounds
8803.6 g / 86.4 N
warning
5 mm 2321 Gs
232.1 mT
5.31 kg / 11.71 pounds
5309.9 g / 52.1 N
warning
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: 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 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) - 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 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: Thermal resistance (stability) - power drop
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 Force (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: Safety (HSE) (implants) - precautionary measures
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
Timepiece 20 Gs (2.0 mT) 7.5 cm
Mobile device 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 (cracking risk) - 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: 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: Electrical 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: Physics of underwater searching
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

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

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Heat tolerance

*For N38 grade, 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 specification and ecology
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
Quick Unit Converter
Magnet pull force

Field Strength

Other deals

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 30x15x10 mm and a weight of 33.75 g, guarantees premium class connection. As a block magnet with high power (approx. 16.84 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is sliding 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 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, 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. 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. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 30x15x10 mm, which, at a weight of 33.75 g, makes it an element with impressive energy density. 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 protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their magnetic field is durable, and after around 10 years it drops only by ~1% (according to research),
  • Neodymium magnets are distinguished by extremely resistant to magnetic field loss caused by external interference,
  • Thanks to the shiny finish, the plating of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • Magnets are characterized by impressive magnetic induction on the outer side,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Possibility of detailed shaping and optimizing to individual conditions,
  • Universal use in future technologies – they serve a role in magnetic memories, motor assemblies, advanced medical instruments, also multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Limitations

Cons of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making threads in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum holding power of the magnet – what it depends on?

The lifting capacity listed is a result of laboratory testing conducted under the following configuration:
  • using a plate made of high-permeability steel, functioning as a magnetic yoke
  • with a cross-section minimum 10 mm
  • with an ground contact surface
  • without the slightest clearance between the magnet and steel
  • under vertical force direction (90-degree angle)
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual holding force results from several key aspects, presented from crucial:
  • Distance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

H&S for magnets
Keep away from children

Strictly store magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are life-threatening.

Power loss in heat

Watch the temperature. Heating the magnet to high heat will destroy its magnetic structure and strength.

Threat to electronics

Device Safety: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Keep away from electronics

A powerful magnetic field negatively affects the operation of compasses in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Flammability

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Fragile material

Despite the nickel coating, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Bone fractures

Big blocks can smash fingers instantly. Do not place your hand betwixt two attracting surfaces.

Health Danger

Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Respect the power

Handle with care. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.

Caution! Need more info? Check our post: Why are neodymium magnets dangerous?