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MPL 10x7x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020115

GTIN/EAN: 5906301811213

5.00

length

10 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.58 g

Magnetization Direction

↑ axial

Load capacity

2.02 kg / 19.82 N

Magnetic Induction

339.79 mT / 3398 Gs

Coating

[NiCuNi] Nickel

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0.849 ZŁ with VAT / pcs + price for transport

0.690 ZŁ net + 23% VAT / pcs

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Detailed specification - MPL 10x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 10x7x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020115
GTIN/EAN 5906301811213
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 7 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 1.58 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.02 kg / 19.82 N
Magnetic Induction ~ ? 339.79 mT / 3398 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 10x7x3 / 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 product - technical parameters

The following data represent the outcome of a engineering simulation. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions may differ. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - characteristics
MPL 10x7x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3396 Gs
339.6 mT
 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
 strong
1 mm 2727 Gs
272.7 mT
 1.30 kg / 2.87 pounds
1303.2 g / 12.8 N
 low risk
2 mm 2053 Gs
205.3 mT
 0.74 kg / 1.63 pounds
738.2 g / 7.2 N
 low risk
3 mm 1502 Gs
150.2 mT
 0.40 kg / 0.87 pounds
395.2 g / 3.9 N
 low risk
5 mm 803 Gs
80.3 mT
 0.11 kg / 0.25 pounds
113.0 g / 1.1 N
 low risk
10 mm 216 Gs
21.6 mT
 0.01 kg / 0.02 pounds
8.2 g / 0.1 N
 low risk
15 mm 82 Gs
8.2 mT
 0.00 kg / 0.00 pounds
1.2 g / 0.0 N
 low risk
20 mm 39 Gs
3.9 mT
 0.00 kg / 0.00 pounds
0.3 g / 0.0 N
 low risk
30 mm 13 Gs
1.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
Grip strength weakens significantly with every subsequent millimeter of spacing. Remember that even a very thin break (e.g., contamination, paint, dust) strongly reduces the pull force. Magnetic products operate most effectively in perfect adhesion; distance weakens the power. Notice how quickly the pull force plummet, when the product does not adhere flatly to the steel surface. When calculating the mounting, avoid unnecessary gaps.

Table 2: Sliding capacity (vertical surface)
MPL 10x7x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.40 kg / 0.89 pounds
404.0 g / 4.0 N
1 mm Stal (~0.2) 0.26 kg / 0.57 pounds
260.0 g / 2.6 N
2 mm Stal (~0.2) 0.15 kg / 0.33 pounds
148.0 g / 1.5 N
3 mm Stal (~0.2) 0.08 kg / 0.18 pounds
80.0 g / 0.8 N
5 mm Stal (~0.2) 0.02 kg / 0.05 pounds
22.0 g / 0.2 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
The table below shows the approximate force required to start the slippage of the magnet down on a upright steel plate (assuming standard friction coefficient). This value is a function of the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 10x7x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.61 kg / 1.34 pounds
606.0 g / 5.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.40 kg / 0.89 pounds
404.0 g / 4.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.20 kg / 0.45 pounds
202.0 g / 2.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.01 kg / 2.23 pounds
1010.0 g / 9.9 N
When hanging a element on a vertical surface (e.g., a fridge), it you can count on only approx. 20%-30% of its nominal power. Gravity as well as a low friction coefficient influence the fact that holders slip faster than they pop off the substrate. Planning a vertical fastening? Note that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the magnet will slip down under a noticeably lighter cargo. Utilizing a rubberized coating can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MPL 10x7x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.20 kg / 0.45 pounds
202.0 g / 2.0 N
1 mm
25%
 0.51 kg / 1.11 pounds
505.0 g / 5.0 N
2 mm
50%
 1.01 kg / 2.23 pounds
1010.0 g / 9.9 N
3 mm
75%
 1.52 kg / 3.34 pounds
1515.0 g / 14.9 N
5 mm
100%
 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
10 mm
100%
 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
11 mm
100%
 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
12 mm
100%
 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
A thin sheet is incapable of absorb the full magnetic flux, which squanders power of the magnet. If you install a neodymium to a thin surface, the flux will penetrate right through and the attraction force will be weaker. To utilize full efficiency of this neodymium's potential, you require a sufficiently solid element of metal. The saturation effect means that on sheet metal structures (e.g., thin profiles), the magnet holds weaker. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal stability (stability) - resistance threshold
MPL 10x7x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
 OK
40 °C -2.2% 1.98 kg / 4.36 pounds
1975.6 g / 19.4 N
 OK
60 °C -4.4% 1.93 kg / 4.26 pounds
1931.1 g / 18.9 N
80 °C -6.6% 1.89 kg / 4.16 pounds
1886.7 g / 18.5 N
100 °C -28.8% 1.44 kg / 3.17 pounds
1438.2 g / 14.1 N
Classic neodymiums lose power past the thermal threshold. Watch out for overheating – heat can permanently destroy this product. With every degree above norm, the neodymium's power momentarily drops. Avoid using 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 (low permeance coefficient) may lose charge permanently at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MPL 10x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.98 kg / 10.97 pounds
4 893 Gs
0.75 kg / 1.65 pounds
746 g / 7.3 N
 N/A
1 mm 4.09 kg / 9.01 pounds
6 155 Gs
0.61 kg / 1.35 pounds
613 g / 6.0 N
 3.68 kg / 8.11 pounds
~0 Gs
2 mm 3.21 kg / 7.08 pounds
5 455 Gs
0.48 kg / 1.06 pounds
482 g / 4.7 N
 2.89 kg / 6.37 pounds
~0 Gs
3 mm 2.44 kg / 5.39 pounds
4 758 Gs
0.37 kg / 0.81 pounds
366 g / 3.6 N
 2.20 kg / 4.85 pounds
~0 Gs
5 mm 1.34 kg / 2.94 pounds
3 518 Gs
0.20 kg / 0.44 pounds
200 g / 2.0 N
 1.20 kg / 2.65 pounds
~0 Gs
10 mm 0.28 kg / 0.61 pounds
1 606 Gs
0.04 kg / 0.09 pounds
42 g / 0.4 N
 0.25 kg / 0.55 pounds
~0 Gs
20 mm 0.02 kg / 0.04 pounds
433 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
 0.02 kg / 0.04 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
43 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
26 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
17 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
11 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
8 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
6 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnetic products attract each other from a significantly greater distance than a magnet and steel setup. Such a system of two magnets creates a more powerful interaction and a further horizon of performance. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the connection force, but still significant.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Estimates show friction force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 10x7x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Mobile device 40 Gs (4.0 mT) 2.0 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field poses a large risk to electronic devices and medical implants. These NdFeB products produce a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and plastic. Exceptional care must be exercised by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MPL 10x7x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 36.15 km/h
(10.04 m/s)
 0.08 J
30 mm 62.46 km/h
(17.35 m/s)
 0.24 J
50 mm 80.63 km/h
(22.40 m/s)
 0.40 J
100 mm 114.03 km/h
(31.68 m/s)
 0.79 J
NdFeB products are very brittle – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Striking energy can cause material chips or dangerous crushing to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the metal. A collision at high speed means shattering of the neodymium. Use safety goggles when working with powerful specimens.

Table 9: Coating parameters (durability)
MPL 10x7x3 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MPL 10x7x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 480 Mx 24.8 µWb
Pc Coefficient 0.42 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data for generator designers as well as sensors. The Pc coefficient determines the working geometry.

Table 11: Physics of underwater searching
MPL 10x7x3 / N38

Environment Effective steel pull Effect
Air (land) 2.02 kg Standard
Water (riverbed) 2.31 kg
(+0.29 kg buoyancy gain)
+14.5%
Corrosion warning: 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. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Sliding resistance

*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42

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%
Sustainability
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: 020115-2026
Quick Unit Converter
Force (pull)
Field Strength
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This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 10x7x3 mm and a weight of 1.58 g, guarantees the highest quality connection. As a block magnet with high power (approx. 2.02 kg), this product is available immediately from our warehouse in Poland. 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. Watch your fingers! Magnets with a force of 2.02 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 10x7x3 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts 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. 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).
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 (10x7 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 10x7x3 mm, which, at a weight of 1.58 g, makes it an element with impressive energy density. The key parameter here is the lifting capacity amounting to approximately 2.02 kg (force ~19.82 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets prove to be remarkably resistant to demagnetization caused by external magnetic fields,
  • A magnet with a shiny silver surface is more attractive,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of detailed creating as well as adjusting to concrete needs,
  • Significant place in modern technologies – they are utilized in magnetic memories, drive modules, advanced medical instruments, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing nuts in the magnet and complicated forms - preferred is casing - magnetic holder.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Maximum magnetic pulling force – what affects it?

Magnet power was determined for the most favorable conditions, assuming:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • with a thickness no less than 10 mm
  • with a surface perfectly flat
  • without any clearance between the magnet and steel
  • under axial force direction (90-degree angle)
  • at temperature room level

Key elements affecting lifting force

It is worth knowing that the working load will differ depending on elements below, starting with the most relevant:
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is available only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was measured using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
Serious injuries

Risk of injury: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Do not overheat magnets

Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and strength.

Protect data

Device Safety: Strong magnets can ruin data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

Choking Hazard

Adult use only. Small elements can be swallowed, leading to severe trauma. Store away from children and animals.

Life threat

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Protective goggles

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Allergic reactions

Medical facts indicate that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid direct skin contact and select versions in plastic housing.

Caution required

Exercise caution. Neodymium magnets act from a distance and connect with massive power, often quicker than you can react.

Dust explosion hazard

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Threat to navigation

A strong magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Maintain magnets close to a device to prevent breaking the sensors.

Security! More info about hazards in the article: Magnet Safety Guide.