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MPL 10x4x1.5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020113

GTIN/EAN: 5906301811190

5.00
Load capacity 0.88 kg / 8.65 N Magnetic Induction 274.96 mT / 2750 Gs
length
10 mm [±0,1 mm]
Width
4 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
0.45 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
see technical specifications »

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Technical - MPL 10x4x1.5 / N38 - lamellar magnet

Specification / characteristics - MPL 10x4x1.5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020113
GTIN/EAN 5906301811190
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 10 mm [±0,1 mm]
Width 4 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 0.45 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.88 kg / 8.65 N
Magnetic Induction ~ ? 274.96 mT / 2750 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 10x4x1.5 / 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 analysis of the assembly - data

The following data represent the result of a engineering calculation. Values are based on models for the class Nd2Fe14B. Operational performance may differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - power drop
MPL 10x4x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2747 Gs
274.7 mT
 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
 low risk
1 mm 1882 Gs
188.2 mT
 0.41 kg / 0.91 lbs
413.1 g / 4.1 N
 low risk
2 mm 1175 Gs
117.5 mT
 0.16 kg / 0.35 lbs
161.0 g / 1.6 N
 low risk
3 mm 746 Gs
74.6 mT
 0.06 kg / 0.14 lbs
64.9 g / 0.6 N
 low risk
5 mm 337 Gs
33.7 mT
 0.01 kg / 0.03 lbs
13.3 g / 0.1 N
 low risk
10 mm 77 Gs
7.7 mT
 0.00 kg / 0.00 lbs
0.7 g / 0.0 N
 low risk
15 mm 27 Gs
2.7 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 low risk
20 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
30 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
Grip strength weakens significantly with every mm of gap. Note that even a very thin break (e.g., contamination, paint, dust) noticeably reduces the pull force. Magnets operate most effectively during direct contact; air break kills the power. See how quickly the load capacity plummet, when the magnet does not adhere tightly to the steel surface. When planning the arrangement, eliminate additional spacers.

Table 2: Shear force (vertical surface)
MPL 10x4x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.18 kg / 0.39 lbs
176.0 g / 1.7 N
1 mm Stal (~0.2) 0.08 kg / 0.18 lbs
82.0 g / 0.8 N
2 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
3 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The table below shows the estimated weight limit sufficient to start the downward movement of the magnet vertically on a vertical steel wall (assuming typical friction coefficient). This parameter varies with the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 10x4x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.26 kg / 0.58 lbs
264.0 g / 2.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.18 kg / 0.39 lbs
176.0 g / 1.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.09 kg / 0.19 lbs
88.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
When mounting a holder on a vertical plane (e.g., a fridge), it will only hold only about 20%-30% of its nominal power. Gravity and a weak degree of grip mean that magnets slip faster than they detach. Planning a hanger? Consider that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a noticeably lighter weight. Using a rubber pad can drastically raise the stability.

Table 4: Material efficiency (saturation) - power losses
MPL 10x4x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.09 kg / 0.19 lbs
88.0 g / 0.9 N
1 mm
25%
 0.22 kg / 0.49 lbs
220.0 g / 2.2 N
2 mm
50%
 0.44 kg / 0.97 lbs
440.0 g / 4.3 N
3 mm
75%
 0.66 kg / 1.46 lbs
660.0 g / 6.5 N
5 mm
100%
 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
10 mm
100%
 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
11 mm
100%
 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
12 mm
100%
 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
A thin metal plate is unable to take in the full magnetic flux, which weakens actual performance of the magnet. If you install a neodymium to a too thin substrate, the field will pass right through and the pull force will drop sharply. To utilize full efficiency of this magnet's power, you require a sufficiently solid element of metal. The saturation effect means that on delicate walls (e.g., thin profiles), the product holds weaker. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 10x4x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.88 kg / 1.94 lbs
880.0 g / 8.6 N
 OK
40 °C -2.2% 0.86 kg / 1.90 lbs
860.6 g / 8.4 N
 OK
60 °C -4.4% 0.84 kg / 1.85 lbs
841.3 g / 8.3 N
80 °C -6.6% 0.82 kg / 1.81 lbs
821.9 g / 8.1 N
100 °C -28.8% 0.63 kg / 1.38 lbs
626.6 g / 6.1 N
Standard neodymium magnets irreversibly lose strength after exceeding the maximum temperature. Avoid high temperatures – high temperature can irreversibly destroy this magnet. With every degree above norm, the neodymium's power briefly drops. Do not use this product close to ovens exceeding its safe range. Too high temperature will lead to permanent loss of magnetism.
*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) may lose charge permanently under lower heat stress compared to rod magnets. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 10x4x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.86 kg / 4.10 lbs
4 229 Gs
0.28 kg / 0.62 lbs
279 g / 2.7 N
 N/A
1 mm 1.34 kg / 2.95 lbs
4 661 Gs
0.20 kg / 0.44 lbs
201 g / 2.0 N
 1.21 kg / 2.66 lbs
~0 Gs
2 mm 0.87 kg / 1.93 lbs
3 764 Gs
0.13 kg / 0.29 lbs
131 g / 1.3 N
 0.79 kg / 1.73 lbs
~0 Gs
3 mm 0.55 kg / 1.21 lbs
2 978 Gs
0.08 kg / 0.18 lbs
82 g / 0.8 N
 0.49 kg / 1.09 lbs
~0 Gs
5 mm 0.21 kg / 0.47 lbs
1 864 Gs
0.03 kg / 0.07 lbs
32 g / 0.3 N
 0.19 kg / 0.43 lbs
~0 Gs
10 mm 0.03 kg / 0.06 lbs
675 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
 0.03 kg / 0.06 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
154 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
13 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
8 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
5 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
3 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
2 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
2 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnets interact from a much further distance than a magnet and steel combination. Such a system of two magnets generates a stronger field and a larger range of performance. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the collision energy is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Field value between like poles is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
Note: Estimates demonstrate friction force of a pair of same magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MPL 10x4x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Mobile device 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation is a large risk to IT equipment as well as medical implants. These neodymiums produce a flux that disrupts operation of digital equipment. Notice: the invisible magnetic field acts through matter and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, speakers, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MPL 10x4x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.93 km/h
(6.93 m/s)
 0.01 J
30 mm 24.94 km/h
(6.93 m/s)
 0.01 J
50 mm 24.93 km/h
(6.92 m/s)
 0.01 J
100 mm 24.95 km/h
(6.93 m/s)
 0.01 J
Neodymium magnets are delicate – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely becomes dangerous. Impact energy can cause material chips or painful pinches to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
MPL 10x4x1.5 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Pc)
MPL 10x4x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 104 Mx 11.0 µWb
Pc Coefficient 0.30 Low (Flat)
Flux value passing through the pole surface. Key data for generator designers and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 10x4x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.88 kg Standard
Water (riverbed) 1.01 kg
(+0.13 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Sliding resistance

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

2. Steel thickness impact

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

3. Thermal stability

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.30

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.

Engineering data and GPSR

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: 020113-2026
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Model MPL 10x4x1.5 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 8.65 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
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 10x4x1.5 / 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.
They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 10x4x1.5 / 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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 10x4x1.5 / N38 model is magnetized axially (dimension 1.5 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 (10x4 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: 10 mm (length), 4 mm (width), and 1.5 mm (thickness). It is a magnetic block with dimensions 10x4x1.5 mm and a self-weight of 0.45 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of rare earth magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • A magnet with a metallic silver surface is more attractive,
  • Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of individual modeling and adapting to concrete requirements,
  • Significant place in advanced technology sectors – they serve a role in HDD drives, electromotive mechanisms, medical devices, as well as technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Holding force of 0.88 kg is a result of laboratory testing conducted under standard conditions:
  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • characterized by even structure
  • with direct contact (no paint)
  • under perpendicular application of breakaway force (90-degree angle)
  • in neutral thermal conditions

Lifting capacity in practice – influencing factors

Effective lifting capacity is influenced by working environment parameters, including (from priority):
  • Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Steel grade – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
  • Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Demagnetization risk

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Powerful field

Use magnets with awareness. Their immense force can shock even professionals. Stay alert and respect their force.

Electronic hazard

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

Beware of splinters

Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Implant safety

People with a heart stimulator have to keep an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.

Choking Hazard

NdFeB magnets are not suitable for play. Eating multiple magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires immediate surgery.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop working with magnets and wear gloves.

Precision electronics

Remember: neodymium magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, device, and navigation systems.

Pinching danger

Protect your hands. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Fire risk

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Safety First! Learn more about risks in the article: Safety of working with magnets.