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MPL 40x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020152

GTIN/EAN: 5906301811589

5.00

length

40 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

15 g

Magnetization Direction

↑ axial

Load capacity

11.85 kg / 116.27 N

Magnetic Induction

321.37 mT / 3214 Gs

Coating

[NiCuNi] Nickel

6.03 with VAT / pcs + price for transport

4.90 ZŁ net + 23% VAT / pcs

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Technical data - MPL 40x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 40x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020152
GTIN/EAN 5906301811589
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 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 15 g
Magnetization Direction ↑ axial
Load capacity ~ ? 11.85 kg / 116.27 N
Magnetic Induction ~ ? 321.37 mT / 3214 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x10x5 / 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 modeling of the product - report

These information are the outcome of a mathematical simulation. Values are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - power drop
MPL 40x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3212 Gs
321.2 mT
11.85 kg / 26.12 lbs
11850.0 g / 116.2 N
dangerous!
1 mm 2791 Gs
279.1 mT
8.95 kg / 19.73 lbs
8947.7 g / 87.8 N
medium risk
2 mm 2358 Gs
235.8 mT
6.38 kg / 14.08 lbs
6384.9 g / 62.6 N
medium risk
3 mm 1965 Gs
196.5 mT
4.43 kg / 9.77 lbs
4432.4 g / 43.5 N
medium risk
5 mm 1360 Gs
136.0 mT
2.12 kg / 4.68 lbs
2122.9 g / 20.8 N
medium risk
10 mm 615 Gs
61.5 mT
0.43 kg / 0.96 lbs
434.1 g / 4.3 N
low risk
15 mm 329 Gs
32.9 mT
0.12 kg / 0.27 lbs
124.5 g / 1.2 N
low risk
20 mm 195 Gs
19.5 mT
0.04 kg / 0.10 lbs
43.9 g / 0.4 N
low risk
30 mm 83 Gs
8.3 mT
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
low risk
50 mm 24 Gs
2.4 mT
0.00 kg / 0.00 lbs
0.6 g / 0.0 N
low risk

Table 2: Vertical force (vertical surface)
MPL 40x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.37 kg / 5.22 lbs
2370.0 g / 23.2 N
1 mm Stal (~0.2) 1.79 kg / 3.95 lbs
1790.0 g / 17.6 N
2 mm Stal (~0.2) 1.28 kg / 2.81 lbs
1276.0 g / 12.5 N
3 mm Stal (~0.2) 0.89 kg / 1.95 lbs
886.0 g / 8.7 N
5 mm Stal (~0.2) 0.42 kg / 0.93 lbs
424.0 g / 4.2 N
10 mm Stal (~0.2) 0.09 kg / 0.19 lbs
86.0 g / 0.8 N
15 mm Stal (~0.2) 0.02 kg / 0.05 lbs
24.0 g / 0.2 N
20 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.55 kg / 7.84 lbs
3555.0 g / 34.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.37 kg / 5.22 lbs
2370.0 g / 23.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.19 kg / 2.61 lbs
1185.0 g / 11.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.93 kg / 13.06 lbs
5925.0 g / 58.1 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.59 kg / 1.31 lbs
592.5 g / 5.8 N
1 mm
13%
1.48 kg / 3.27 lbs
1481.3 g / 14.5 N
2 mm
25%
2.96 kg / 6.53 lbs
2962.5 g / 29.1 N
3 mm
38%
4.44 kg / 9.80 lbs
4443.8 g / 43.6 N
5 mm
63%
7.41 kg / 16.33 lbs
7406.3 g / 72.7 N
10 mm
100%
11.85 kg / 26.12 lbs
11850.0 g / 116.2 N
11 mm
100%
11.85 kg / 26.12 lbs
11850.0 g / 116.2 N
12 mm
100%
11.85 kg / 26.12 lbs
11850.0 g / 116.2 N

Table 5: Working in heat (material behavior) - thermal limit
MPL 40x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 11.85 kg / 26.12 lbs
11850.0 g / 116.2 N
OK
40 °C -2.2% 11.59 kg / 25.55 lbs
11589.3 g / 113.7 N
OK
60 °C -4.4% 11.33 kg / 24.98 lbs
11328.6 g / 111.1 N
80 °C -6.6% 11.07 kg / 24.40 lbs
11067.9 g / 108.6 N
100 °C -28.8% 8.44 kg / 18.60 lbs
8437.2 g / 82.8 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 40x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 25.44 kg / 56.10 lbs
4 569 Gs
3.82 kg / 8.41 lbs
3817 g / 37.4 N
N/A
1 mm 22.33 kg / 49.22 lbs
6 018 Gs
3.35 kg / 7.38 lbs
3349 g / 32.9 N
20.09 kg / 44.30 lbs
~0 Gs
2 mm 19.21 kg / 42.36 lbs
5 582 Gs
2.88 kg / 6.35 lbs
2882 g / 28.3 N
17.29 kg / 38.12 lbs
~0 Gs
3 mm 16.31 kg / 35.96 lbs
5 144 Gs
2.45 kg / 5.39 lbs
2447 g / 24.0 N
14.68 kg / 32.36 lbs
~0 Gs
5 mm 11.45 kg / 25.23 lbs
4 309 Gs
1.72 kg / 3.78 lbs
1717 g / 16.8 N
10.30 kg / 22.71 lbs
~0 Gs
10 mm 4.56 kg / 10.05 lbs
2 719 Gs
0.68 kg / 1.51 lbs
684 g / 6.7 N
4.10 kg / 9.04 lbs
~0 Gs
20 mm 0.93 kg / 2.05 lbs
1 230 Gs
0.14 kg / 0.31 lbs
140 g / 1.4 N
0.84 kg / 1.85 lbs
~0 Gs
50 mm 0.04 kg / 0.08 lbs
249 Gs
0.01 kg / 0.01 lbs
6 g / 0.1 N
0.03 kg / 0.08 lbs
~0 Gs
60 mm 0.02 kg / 0.04 lbs
167 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.03 lbs
~0 Gs
70 mm 0.01 kg / 0.02 lbs
116 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.01 lbs
84 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.01 lbs
62 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
48 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 9.0 cm
Hearing aid 10 Gs (1.0 mT) 7.0 cm
Mechanical watch 20 Gs (2.0 mT) 5.5 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Car key 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (kinetic energy) - warning
MPL 40x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.99 km/h
(8.05 m/s)
0.49 J
30 mm 49.12 km/h
(13.64 m/s)
1.40 J
50 mm 63.39 km/h
(17.61 m/s)
2.33 J
100 mm 89.64 km/h
(24.90 m/s)
4.65 J

Table 9: Anti-corrosion coating durability
MPL 40x10x5 / 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 40x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 11 419 Mx 114.2 µWb
Pc Coefficient 0.31 Low (Flat)

Table 11: Physics of underwater searching
MPL 40x10x5 / N38

Environment Effective steel pull Effect
Air (land) 11.85 kg Standard
Water (riverbed) 13.57 kg
(+1.72 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. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains just ~20% of its nominal pull.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Power loss vs temp

*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) = 0.31

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
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: 020152-2026
Magnet Unit Converter
Magnet pull force

Field Strength

See also proposals

Component MPL 40x10x5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. This magnetic block with a force of 116.27 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating secures 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. To separate the MPL 40x10x5 / 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.
They constitute a key element in the production of wind generators and material handling systems. They work great as invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 40x10x5 / 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.
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 (40x10 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.
This model is characterized by dimensions 40x10x5 mm, which, at a weight of 15 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 11.85 kg (force ~116.27 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of neodymium magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even during nearly ten years – the reduction in power is only ~1% (according to tests),
  • They maintain their magnetic properties even under close interference source,
  • By using a decorative layer of nickel, the element gains an nice look,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • In view of the potential of precise forming and customization to specialized solutions, neodymium magnets can be created in a broad palette of geometric configurations, which increases their versatility,
  • Wide application in modern industrial fields – they find application in hard drives, brushless drives, medical devices, and modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that small components of these products are able to complicate diagnosis medical after entering the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Breakaway force was defined for optimal configuration, including:
  • on a block made of structural steel, perfectly concentrating the magnetic flux
  • whose transverse dimension is min. 10 mm
  • with an ground touching surface
  • under conditions of gap-free contact (surface-to-surface)
  • under vertical force direction (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In practice, the real power depends on a number of factors, ranked from crucial:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Caution required

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Fragile material

Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Adults only

Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.

Bodily injuries

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Danger to pacemakers

For implant holders: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Protect data

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Precision electronics

GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Flammability

Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Operating temperature

Do not overheat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Nickel allergy

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.

Safety First! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98