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MPL 40x15x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020155

GTIN/EAN: 5906301811619

5.00

length

40 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

27 g

Magnetization Direction

↑ axial

Load capacity

14.21 kg / 139.45 N

Magnetic Induction

286.36 mT / 2864 Gs

Coating

[NiCuNi] Nickel

18.45 with VAT / pcs + price for transport

15.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Weight as well as appearance of a neodymium magnet can be checked with our modular calculator.

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Technical of the product - MPL 40x15x6 / N38 - lamellar magnet

Specification / characteristics - MPL 40x15x6 / N38 - lamellar magnet

properties
properties values
Cat. no. 020155
GTIN/EAN 5906301811619
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 40 mm [±0,1 mm]
Width 15 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 27 g
Magnetization Direction ↑ axial
Load capacity ~ ? 14.21 kg / 139.45 N
Magnetic Induction ~ ? 286.36 mT / 2864 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x15x6 / 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 modeling of the product - data

These values represent the outcome of a mathematical analysis. Values rely on algorithms for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MPL 40x15x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2863 Gs
286.3 mT
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
critical level
1 mm 2635 Gs
263.5 mT
12.04 kg / 26.55 LBS
12041.8 g / 118.1 N
critical level
2 mm 2385 Gs
238.5 mT
9.86 kg / 21.74 LBS
9859.1 g / 96.7 N
strong
3 mm 2132 Gs
213.2 mT
7.88 kg / 17.37 LBS
7880.1 g / 77.3 N
strong
5 mm 1670 Gs
167.0 mT
4.84 kg / 10.66 LBS
4837.1 g / 47.5 N
strong
10 mm 903 Gs
90.3 mT
1.41 kg / 3.11 LBS
1412.2 g / 13.9 N
safe
15 mm 520 Gs
52.0 mT
0.47 kg / 1.03 LBS
469.2 g / 4.6 N
safe
20 mm 320 Gs
32.0 mT
0.18 kg / 0.39 LBS
177.7 g / 1.7 N
safe
30 mm 141 Gs
14.1 mT
0.03 kg / 0.08 LBS
34.5 g / 0.3 N
safe
50 mm 41 Gs
4.1 mT
0.00 kg / 0.01 LBS
3.0 g / 0.0 N
safe

Table 2: Slippage load (wall)
MPL 40x15x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.84 kg / 6.27 LBS
2842.0 g / 27.9 N
1 mm Stal (~0.2) 2.41 kg / 5.31 LBS
2408.0 g / 23.6 N
2 mm Stal (~0.2) 1.97 kg / 4.35 LBS
1972.0 g / 19.3 N
3 mm Stal (~0.2) 1.58 kg / 3.47 LBS
1576.0 g / 15.5 N
5 mm Stal (~0.2) 0.97 kg / 2.13 LBS
968.0 g / 9.5 N
10 mm Stal (~0.2) 0.28 kg / 0.62 LBS
282.0 g / 2.8 N
15 mm Stal (~0.2) 0.09 kg / 0.21 LBS
94.0 g / 0.9 N
20 mm Stal (~0.2) 0.04 kg / 0.08 LBS
36.0 g / 0.4 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 (shearing) - vertical pull
MPL 40x15x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
4.26 kg / 9.40 LBS
4263.0 g / 41.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.84 kg / 6.27 LBS
2842.0 g / 27.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.42 kg / 3.13 LBS
1421.0 g / 13.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
7.11 kg / 15.66 LBS
7105.0 g / 69.7 N

Table 4: Material efficiency (saturation) - power losses
MPL 40x15x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.71 kg / 1.57 LBS
710.5 g / 7.0 N
1 mm
13%
1.78 kg / 3.92 LBS
1776.3 g / 17.4 N
2 mm
25%
3.55 kg / 7.83 LBS
3552.5 g / 34.9 N
3 mm
38%
5.33 kg / 11.75 LBS
5328.8 g / 52.3 N
5 mm
63%
8.88 kg / 19.58 LBS
8881.3 g / 87.1 N
10 mm
100%
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
11 mm
100%
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
12 mm
100%
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N

Table 5: Thermal stability (material behavior) - thermal limit
MPL 40x15x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
OK
40 °C -2.2% 13.90 kg / 30.64 LBS
13897.4 g / 136.3 N
OK
60 °C -4.4% 13.58 kg / 29.95 LBS
13584.8 g / 133.3 N
80 °C -6.6% 13.27 kg / 29.26 LBS
13272.1 g / 130.2 N
100 °C -28.8% 10.12 kg / 22.31 LBS
10117.5 g / 99.3 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 40x15x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 30.32 kg / 66.84 LBS
4 334 Gs
4.55 kg / 10.03 LBS
4547 g / 44.6 N
N/A
1 mm 28.06 kg / 61.86 LBS
5 508 Gs
4.21 kg / 9.28 LBS
4209 g / 41.3 N
25.25 kg / 55.67 LBS
~0 Gs
2 mm 25.69 kg / 56.64 LBS
5 271 Gs
3.85 kg / 8.50 LBS
3854 g / 37.8 N
23.12 kg / 50.97 LBS
~0 Gs
3 mm 23.33 kg / 51.43 LBS
5 023 Gs
3.50 kg / 7.71 LBS
3499 g / 34.3 N
21.00 kg / 46.29 LBS
~0 Gs
5 mm 18.85 kg / 41.56 LBS
4 515 Gs
2.83 kg / 6.23 LBS
2828 g / 27.7 N
16.97 kg / 37.40 LBS
~0 Gs
10 mm 10.32 kg / 22.75 LBS
3 341 Gs
1.55 kg / 3.41 LBS
1548 g / 15.2 N
9.29 kg / 20.48 LBS
~0 Gs
20 mm 3.01 kg / 6.64 LBS
1 805 Gs
0.45 kg / 1.00 LBS
452 g / 4.4 N
2.71 kg / 5.98 LBS
~0 Gs
50 mm 0.16 kg / 0.35 LBS
416 Gs
0.02 kg / 0.05 LBS
24 g / 0.2 N
0.14 kg / 0.32 LBS
~0 Gs
60 mm 0.07 kg / 0.16 LBS
282 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
0.07 kg / 0.15 LBS
~0 Gs
70 mm 0.04 kg / 0.08 LBS
199 Gs
0.01 kg / 0.01 LBS
5 g / 0.1 N
0.03 kg / 0.07 LBS
~0 Gs
80 mm 0.02 kg / 0.04 LBS
144 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 / 0.02 LBS
108 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 / 0.01 LBS
83 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MPL 40x15x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 11.0 cm
Hearing aid 10 Gs (1.0 mT) 8.5 cm
Timepiece 20 Gs (2.0 mT) 7.0 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) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (kinetic energy) - collision effects
MPL 40x15x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.53 km/h
(6.81 m/s)
0.63 J
30 mm 40.13 km/h
(11.15 m/s)
1.68 J
50 mm 51.74 km/h
(14.37 m/s)
2.79 J
100 mm 73.16 km/h
(20.32 m/s)
5.58 J

Table 9: Coating parameters (durability)
MPL 40x15x6 / 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 40x15x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 16 905 Mx 169.0 µWb
Pc Coefficient 0.31 Low (Flat)

Table 11: Submerged application
MPL 40x15x6 / N38

Environment Effective steel pull Effect
Air (land) 14.21 kg Standard
Water (riverbed) 16.27 kg
(+2.06 kg buoyancy gain)
+14.5%
Rust risk: 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 surface, the magnet holds only a fraction of its nominal pull.

2. Steel saturation

*Thin steel (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) = 0.31

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%
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: 020155-2026
Magnet Unit Converter
Pulling force

Magnetic Induction

Other proposals

Model MPL 40x15x6 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 14.21 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures 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. To separate the MPL 40x15x6 / 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 40x15x6 / 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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to roughen and wash 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. 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.
The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 15 mm (width), and 6 mm (thickness). The key parameter here is the holding force amounting to approximately 14.21 kg (force ~139.45 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Pros

Apart from their superior power, neodymium magnets have these key benefits:
  • Their strength remains stable, and after approximately ten years it drops only by ~1% (theoretically),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • In other words, due to the shiny finish of gold, the element becomes visually attractive,
  • The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Possibility of precise creating as well as adapting to precise applications,
  • Universal use in advanced technology sectors – they are utilized in computer drives, motor assemblies, advanced medical instruments, and complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in force. 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
  • They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
  • With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat it depends on?

The load parameter shown concerns the limit force, obtained under ideal test conditions, meaning:
  • with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • whose thickness reaches at least 10 mm
  • with an ideally smooth touching surface
  • without any air gap between the magnet and steel
  • during pulling in a direction vertical to the plane
  • in stable room temperature

Key elements affecting lifting force

Bear in mind that the working load will differ influenced by the following factors, starting with the most relevant:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin steel causes magnetic saturation, causing part of the power to be escaped into the air.
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content lower magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets
Keep away from electronics

A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.

Protective goggles

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets leads to them breaking into shards.

Serious injuries

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.

Flammability

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Adults only

Neodymium magnets are not toys. Accidental ingestion of a few magnets can lead to them attracting across intestines, which constitutes a critical condition and requires urgent medical intervention.

Safe distance

Device Safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).

Heat warning

Standard neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.

Handling guide

Handle magnets consciously. Their immense force can shock even professionals. Stay alert and do not underestimate their force.

Nickel coating and allergies

Some people suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause an allergic reaction. We suggest wear protective gloves.

Medical implants

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Important! 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