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MPL 10x10x4 / N38 - lamellar magnet

lamellar magnet

Catalog no 020112

GTIN/EAN: 5906301811183

5.00

length

10 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3 g

Magnetization Direction

↑ axial

Load capacity

3.10 kg / 30.39 N

Magnetic Induction

360.85 mT / 3608 Gs

Coating

[NiCuNi] Nickel

1.538 with VAT / pcs + price for transport

1.250 ZŁ net + 23% VAT / pcs

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Technical details - MPL 10x10x4 / N38 - lamellar magnet

Specification / characteristics - MPL 10x10x4 / N38 - lamellar magnet

properties
properties values
Cat. no. 020112
GTIN/EAN 5906301811183
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 10 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 3 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.10 kg / 30.39 N
Magnetic Induction ~ ? 360.85 mT / 3608 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 10x10x4 / 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

Engineering analysis of the product - data

These data represent the result of a engineering analysis. Values were calculated on algorithms for the class Nd2Fe14B. Actual conditions may differ. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MPL 10x10x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3606 Gs
360.6 mT
3.10 kg / 6.83 LBS
3100.0 g / 30.4 N
warning
1 mm 3035 Gs
303.5 mT
2.20 kg / 4.84 LBS
2195.5 g / 21.5 N
warning
2 mm 2436 Gs
243.6 mT
1.41 kg / 3.12 LBS
1413.8 g / 13.9 N
low risk
3 mm 1900 Gs
190.0 mT
0.86 kg / 1.90 LBS
860.8 g / 8.4 N
low risk
5 mm 1127 Gs
112.7 mT
0.30 kg / 0.67 LBS
302.7 g / 3.0 N
low risk
10 mm 347 Gs
34.7 mT
0.03 kg / 0.06 LBS
28.8 g / 0.3 N
low risk
15 mm 140 Gs
14.0 mT
0.00 kg / 0.01 LBS
4.6 g / 0.0 N
low risk
20 mm 68 Gs
6.8 mT
0.00 kg / 0.00 LBS
1.1 g / 0.0 N
low risk
30 mm 23 Gs
2.3 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
low risk
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk

Table 2: Shear capacity (wall)
MPL 10x10x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.62 kg / 1.37 LBS
620.0 g / 6.1 N
1 mm Stal (~0.2) 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
2 mm Stal (~0.2) 0.28 kg / 0.62 LBS
282.0 g / 2.8 N
3 mm Stal (~0.2) 0.17 kg / 0.38 LBS
172.0 g / 1.7 N
5 mm Stal (~0.2) 0.06 kg / 0.13 LBS
60.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 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

Table 3: Wall mounting (shearing) - vertical pull
MPL 10x10x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.93 kg / 2.05 LBS
930.0 g / 9.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.62 kg / 1.37 LBS
620.0 g / 6.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.31 kg / 0.68 LBS
310.0 g / 3.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.55 kg / 3.42 LBS
1550.0 g / 15.2 N

Table 4: Steel thickness (saturation) - power losses
MPL 10x10x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.31 kg / 0.68 LBS
310.0 g / 3.0 N
1 mm
25%
0.78 kg / 1.71 LBS
775.0 g / 7.6 N
2 mm
50%
1.55 kg / 3.42 LBS
1550.0 g / 15.2 N
3 mm
75%
2.33 kg / 5.13 LBS
2325.0 g / 22.8 N
5 mm
100%
3.10 kg / 6.83 LBS
3100.0 g / 30.4 N
10 mm
100%
3.10 kg / 6.83 LBS
3100.0 g / 30.4 N
11 mm
100%
3.10 kg / 6.83 LBS
3100.0 g / 30.4 N
12 mm
100%
3.10 kg / 6.83 LBS
3100.0 g / 30.4 N

Table 5: Thermal stability (material behavior) - thermal limit
MPL 10x10x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.10 kg / 6.83 LBS
3100.0 g / 30.4 N
OK
40 °C -2.2% 3.03 kg / 6.68 LBS
3031.8 g / 29.7 N
OK
60 °C -4.4% 2.96 kg / 6.53 LBS
2963.6 g / 29.1 N
80 °C -6.6% 2.90 kg / 6.38 LBS
2895.4 g / 28.4 N
100 °C -28.8% 2.21 kg / 4.87 LBS
2207.2 g / 21.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 10x10x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 8.02 kg / 17.68 LBS
5 067 Gs
1.20 kg / 2.65 LBS
1203 g / 11.8 N
N/A
1 mm 6.85 kg / 15.11 LBS
6 667 Gs
1.03 kg / 2.27 LBS
1028 g / 10.1 N
6.17 kg / 13.59 LBS
~0 Gs
2 mm 5.68 kg / 12.52 LBS
6 070 Gs
0.85 kg / 1.88 LBS
852 g / 8.4 N
5.11 kg / 11.27 LBS
~0 Gs
3 mm 4.60 kg / 10.14 LBS
5 463 Gs
0.69 kg / 1.52 LBS
690 g / 6.8 N
4.14 kg / 9.13 LBS
~0 Gs
5 mm 2.87 kg / 6.32 LBS
4 313 Gs
0.43 kg / 0.95 LBS
430 g / 4.2 N
2.58 kg / 5.69 LBS
~0 Gs
10 mm 0.78 kg / 1.73 LBS
2 254 Gs
0.12 kg / 0.26 LBS
117 g / 1.2 N
0.70 kg / 1.55 LBS
~0 Gs
20 mm 0.07 kg / 0.16 LBS
695 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
0.07 kg / 0.15 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
76 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
46 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
30 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
21 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
15 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
11 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 10x10x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Remote 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) - warning
MPL 10x10x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 32.61 km/h
(9.06 m/s)
0.12 J
30 mm 56.15 km/h
(15.60 m/s)
0.36 J
50 mm 72.49 km/h
(20.14 m/s)
0.61 J
100 mm 102.52 km/h
(28.48 m/s)
1.22 J

Table 9: Surface protection spec
MPL 10x10x4 / 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 (Flux)
MPL 10x10x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 760 Mx 37.6 µWb
Pc Coefficient 0.46 Low (Flat)

Table 11: Physics of underwater searching
MPL 10x10x4 / N38

Environment Effective steel pull Effect
Air (land) 3.10 kg Standard
Water (riverbed) 3.55 kg
(+0.45 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. Vertical hold

*Note: On a vertical wall, the magnet holds just approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Temperature resistance

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.46

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: 020112-2026
Magnet Unit Converter
Magnet pull force

Field Strength

Other proposals

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 10x10x4 mm and a weight of 3 g, guarantees premium class connection. This magnetic block with a force of 30.39 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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 3.10 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 10x10x4 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. 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. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 10x10x4 mm, which, at a weight of 3 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 3.10 kg (force ~30.39 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Benefits

Besides their high retention, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after around 10 years – the drop in power is only ~1% (theoretically),
  • They maintain their magnetic properties even under close interference source,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnetic induction on the working layer of the magnet turns out to be very high,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of accurate creating as well as adapting to specific conditions,
  • Versatile presence in advanced technology sectors – they are utilized in computer drives, drive modules, advanced medical instruments, as well as modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Due to limitations in producing nuts and complex shapes in magnets, we propose using cover - magnetic mount.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat it depends on?

Breakaway force was determined for ideal contact conditions, taking into account:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a thickness of at least 10 mm
  • characterized by even structure
  • with direct contact (no impurities)
  • during pulling in a direction vertical to the plane
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, mainly (from priority):
  • Clearance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Permanent damage

Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Fire warning

Powder created during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Medical implants

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

No play value

NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and necessitates urgent medical intervention.

Impact on smartphones

Note: rare earth magnets generate a field that confuses precision electronics. Keep a separation from your phone, device, and GPS.

Electronic hazard

Very strong magnetic fields can destroy records on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Powerful field

Handle with care. Rare earth magnets attract from a long distance and snap with massive power, often faster than you can move away.

Nickel coating and allergies

A percentage of the population suffer from a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling might lead to an allergic reaction. We recommend use safety gloves.

Bone fractures

Big blocks can smash fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Magnets are brittle

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

Important! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98