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MPL 15x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020123

GTIN/EAN: 5906301811299

5.00

length

15 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

2.81 g

Magnetization Direction

↑ axial

Load capacity

3.20 kg / 31.38 N

Magnetic Induction

468.69 mT / 4687 Gs

Coating

[NiCuNi] Nickel

1.390 with VAT / pcs + price for transport

1.130 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical data of the product - MPL 15x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 15x5x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020123
GTIN/EAN 5906301811299
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 15 mm [±0,1 mm]
Width 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 2.81 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.20 kg / 31.38 N
Magnetic Induction ~ ? 468.69 mT / 4687 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x5x5 / 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 product - technical parameters

These information are the result of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational performance may differ. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - interaction chart
MPL 15x5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4682 Gs
468.2 mT
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
warning
1 mm 3410 Gs
341.0 mT
1.70 kg / 3.74 pounds
1697.3 g / 16.7 N
low risk
2 mm 2394 Gs
239.4 mT
0.84 kg / 1.84 pounds
836.5 g / 8.2 N
low risk
3 mm 1701 Gs
170.1 mT
0.42 kg / 0.93 pounds
422.6 g / 4.1 N
low risk
5 mm 928 Gs
92.8 mT
0.13 kg / 0.28 pounds
125.8 g / 1.2 N
low risk
10 mm 286 Gs
28.6 mT
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
low risk
15 mm 119 Gs
11.9 mT
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
low risk
20 mm 59 Gs
5.9 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
low risk
30 mm 21 Gs
2.1 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Vertical capacity (wall)
MPL 15x5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.64 kg / 1.41 pounds
640.0 g / 6.3 N
1 mm Stal (~0.2) 0.34 kg / 0.75 pounds
340.0 g / 3.3 N
2 mm Stal (~0.2) 0.17 kg / 0.37 pounds
168.0 g / 1.6 N
3 mm Stal (~0.2) 0.08 kg / 0.19 pounds
84.0 g / 0.8 N
5 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 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) - behavior on slippery surfaces
MPL 15x5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 15x5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
1 mm
25%
0.80 kg / 1.76 pounds
800.0 g / 7.8 N
2 mm
50%
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
3 mm
75%
2.40 kg / 5.29 pounds
2400.0 g / 23.5 N
5 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
10 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
11 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
12 mm
100%
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N

Table 5: Working in heat (stability) - power drop
MPL 15x5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
OK
40 °C -2.2% 3.13 kg / 6.90 pounds
3129.6 g / 30.7 N
OK
60 °C -4.4% 3.06 kg / 6.74 pounds
3059.2 g / 30.0 N
80 °C -6.6% 2.99 kg / 6.59 pounds
2988.8 g / 29.3 N
100 °C -28.8% 2.28 kg / 5.02 pounds
2278.4 g / 22.4 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 15x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 10.14 kg / 22.35 pounds
5 608 Gs
1.52 kg / 3.35 pounds
1520 g / 14.9 N
N/A
1 mm 7.53 kg / 16.60 pounds
8 071 Gs
1.13 kg / 2.49 pounds
1129 g / 11.1 N
6.78 kg / 14.94 pounds
~0 Gs
2 mm 5.38 kg / 11.85 pounds
6 820 Gs
0.81 kg / 1.78 pounds
806 g / 7.9 N
4.84 kg / 10.67 pounds
~0 Gs
3 mm 3.78 kg / 8.33 pounds
5 716 Gs
0.57 kg / 1.25 pounds
567 g / 5.6 N
3.40 kg / 7.49 pounds
~0 Gs
5 mm 1.87 kg / 4.13 pounds
4 024 Gs
0.28 kg / 0.62 pounds
281 g / 2.8 N
1.68 kg / 3.71 pounds
~0 Gs
10 mm 0.40 kg / 0.88 pounds
1 857 Gs
0.06 kg / 0.13 pounds
60 g / 0.6 N
0.36 kg / 0.79 pounds
~0 Gs
20 mm 0.04 kg / 0.08 pounds
572 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.03 kg / 0.08 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
67 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
41 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
27 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
19 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
14 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
10 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 15x5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MPL 15x5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.11 km/h
(9.48 m/s)
0.13 J
30 mm 58.95 km/h
(16.37 m/s)
0.38 J
50 mm 76.10 km/h
(21.14 m/s)
0.63 J
100 mm 107.62 km/h
(29.90 m/s)
1.26 J

Table 9: Corrosion resistance
MPL 15x5x5 / 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 (Pc)
MPL 15x5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 366 Mx 33.7 µWb
Pc Coefficient 0.60 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 15x5x5 / N38

Environment Effective steel pull Effect
Air (land) 3.20 kg Standard
Water (riverbed) 3.66 kg
(+0.46 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.60

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
Material specification
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: 020123-2026
Measurement Calculator
Pulling force

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 15x5x5 mm and a weight of 2.81 g, guarantees premium class connection. This magnetic block with a force of 31.38 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.
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 15x5x5 / 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 15x5x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. 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 15x5x5 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 15x5x5 / N38 model is magnetized axially (dimension 5 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 (15x5 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: 15 mm (length), 5 mm (width), and 5 mm (thickness). The key parameter here is the holding force amounting to approximately 3.20 kg (force ~31.38 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of neodymium magnets.

Benefits

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets are distinguished by highly resistant to magnetic field loss caused by external field sources,
  • A magnet with a metallic gold surface looks better,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to the potential of accurate forming and customization to unique requirements, magnetic components can be produced in a broad palette of shapes and sizes, which amplifies use scope,
  • Universal use in modern technologies – they serve a role in hard drives, electric motors, medical devices, as well as industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making nuts in the magnet and complicated shapes - recommended is casing - mounting mechanism.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The force parameter is a result of laboratory testing executed under standard conditions:
  • on a block made of mild steel, perfectly concentrating the magnetic field
  • whose thickness reaches at least 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Lifting capacity in real conditions – factors

Real force is influenced by working environment parameters, such as (from most important):
  • Clearance – the presence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets
GPS and phone interference

Be aware: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your mobile, device, and GPS.

Metal Allergy

It is widely known that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or choose coated magnets.

Serious injuries

Big blocks can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Risk of cracking

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Heat sensitivity

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Do not underestimate power

Use magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and do not underestimate their power.

Combustion hazard

Powder produced during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Cards and drives

Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Implant safety

People with a ICD have to maintain an absolute distance from magnets. The magnetism can disrupt the operation of the implant.

Choking Hazard

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which poses a direct threat to life and requires immediate surgery.

Warning! More info about risks in the article: Magnet Safety Guide.