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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

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Technical details - 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

Physical simulation of the magnet - report

These data are the direct effect of a engineering analysis. Results rely on models for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - characteristics
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
strong
1 mm 3410 Gs
341.0 mT
1.70 kg / 3.74 pounds
1697.3 g / 16.7 N
safe
2 mm 2394 Gs
239.4 mT
0.84 kg / 1.84 pounds
836.5 g / 8.2 N
safe
3 mm 1701 Gs
170.1 mT
0.42 kg / 0.93 pounds
422.6 g / 4.1 N
safe
5 mm 928 Gs
92.8 mT
0.13 kg / 0.28 pounds
125.8 g / 1.2 N
safe
10 mm 286 Gs
28.6 mT
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
safe
15 mm 119 Gs
11.9 mT
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
safe
20 mm 59 Gs
5.9 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
safe
30 mm 21 Gs
2.1 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Shear 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: Vertical assembly (shearing) - vertical pull
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 (substrate influence) - 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: Thermal stability (material behavior) - 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: Two magnets (attraction) - forces in the system
MPL 15x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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: Hazards (implants) - warnings
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
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 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: Impact energy (cracking risk) - collision effects
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: Coating parameters (durability)
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: Electrical 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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically weakens the holding force.

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

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

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.

Engineering data and GPSR
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%
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
Force (pull)

Field Strength

See also products

This product is an extremely strong 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. As a magnetic bar with high power (approx. 3.20 kg), this product is available immediately from our warehouse in Poland. Furthermore, 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 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 15x5x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 3.20 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 15x5x5 / N38 model is magnetized through the thickness (dimension 5 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 15x5x5 mm, which, at a weight of 2.81 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 15x5x5 mm and a self-weight of 2.81 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Strengths

Besides their immense strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • They retain their magnetic properties even under strong external field,
  • A magnet with a smooth silver surface looks better,
  • Neodymium magnets ensure maximum magnetic induction on a their surface, which allows for strong attraction,
  • 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 flexibility in designing and the ability to adapt to client solutions,
  • Universal use in electronics industry – they are used in computer drives, brushless drives, medical devices, as well as multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 immune to moisture, in case of application outdoors
  • Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic mount.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Furthermore, small elements of these products can disrupt the diagnostic process medical when they are in the body.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

Holding force of 3.20 kg is a theoretical maximum value conducted under standard conditions:
  • on a plate made of mild steel, effectively closing the magnetic field
  • with a thickness of at least 10 mm
  • characterized by smoothness
  • with total lack of distance (no coatings)
  • during detachment in a direction perpendicular to the plane
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

It is worth knowing that the magnet holding will differ subject to the following factors, in order of importance:
  • Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Base massiveness – too thin sheet causes magnetic saturation, causing part of the power to be lost to the other side.
  • Steel type – mild steel gives the best results. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets
Maximum temperature

Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Phone sensors

Be aware: rare earth magnets generate a field that disrupts precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.

Electronic hazard

Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Fragile material

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.

Implant safety

Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Powerful field

Handle with care. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.

This is not a toy

Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.

Hand protection

Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Fire risk

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Allergic reactions

Some people have a sensitization to Ni, which is the typical protective layer for neodymium magnets. Extended handling can result in dermatitis. It is best to wear protective gloves.

Important! 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