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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

0.849 with VAT / pcs + price for transport

0.690 ZŁ net + 23% VAT / pcs

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Technical details - 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

Physical modeling of the product - technical parameters

These values constitute the result of a engineering simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world conditions might slightly differ. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - interaction chart
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
medium risk
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

Table 2: Sliding load (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

Table 3: Vertical assembly (shearing) - vertical pull
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

Table 4: Steel thickness (saturation) - sheet metal selection
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

Table 5: Working in heat (stability) - power drop
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

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 10x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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

Table 7: Hazards (electronics) - warnings
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
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 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

Table 8: Collisions (cracking risk) - collision effects
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

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)

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

Parameter Value SI Unit / Description
Magnetic Flux 2 480 Mx 24.8 µWb
Pc Coefficient 0.42 Low (Flat)

Table 11: Hydrostatics and buoyancy
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.
1. Shear force

*Caution: On a vertical wall, the magnet holds just ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. computer case) significantly weakens the holding force.

3. Thermal stability

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

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

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

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.

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%
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

Other products

Component MPL 10x7x3 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 19.82 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.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 10x7x3 / 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. 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 fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 10x7x3 / N38, it is best to use strong epoxy glues (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 10x7x3 / N38 model is magnetized axially (dimension 3 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 (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 high energy density. It is a magnetic block with dimensions 10x7x3 mm and a self-weight of 1.58 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Pros

Apart from their consistent power, neodymium magnets have these key benefits:
  • They retain attractive force for almost 10 years – the drop is just ~1% (according to analyses),
  • Neodymium magnets are distinguished by highly resistant to loss of magnetic properties caused by external interference,
  • The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets possess very high magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the ability of free molding and adaptation to custom requirements, neodymium magnets can be modeled in a variety of shapes and sizes, which increases their versatility,
  • Universal use in innovative solutions – they are commonly used in data components, electric motors, medical devices, also complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • 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 durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing threads in the magnet and complex shapes - recommended is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these devices can be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The load parameter shown represents the maximum value, obtained under optimal environment, namely:
  • using a base made of mild steel, serving as a circuit closing element
  • whose transverse dimension is min. 10 mm
  • characterized by even structure
  • without any clearance between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Bear in mind that the application force may be lower depending on elements below, starting with the most relevant:
  • Clearance – the presence of any layer (paint, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
  • Plate thickness – too thin steel does not close the flux, causing part of the power to be wasted to the other side.
  • Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Hand protection

Risk of injury: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Handling rules

Be careful. Neodymium magnets attract from a distance and snap with massive power, often faster than you can react.

Threat to electronics

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).

Swallowing risk

Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep away from kids and pets.

Power loss in heat

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Protective goggles

NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into shards.

Fire warning

Powder generated during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Avoid contact if allergic

Some people suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Frequent touching may cause a rash. We recommend wear safety gloves.

Health Danger

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

Compass and GPS

Remember: rare earth magnets generate a field that interferes with precision electronics. Maintain a safe distance from your phone, device, and GPS.

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