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MPL 5x4x1 / N38 - lamellar magnet

lamellar magnet

Catalog no 020169

GTIN/EAN: 5906301811756

5.00

length

5 mm [±0,1 mm]

Width

4 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.15 g

Magnetization Direction

↑ axial

Load capacity

0.32 kg / 3.16 N

Magnetic Induction

232.88 mT / 2329 Gs

Coating

[NiCuNi] Nickel

0.1845 with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

bulk discounts:

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Give us a call +48 888 99 98 98 or send us a note using inquiry form through our site.
Weight along with shape of a magnet can be verified with our force calculator.

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Detailed specification - MPL 5x4x1 / N38 - lamellar magnet

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

properties
properties values
Cat. no. 020169
GTIN/EAN 5906301811756
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 5 mm [±0,1 mm]
Width 4 mm [±0,1 mm]
Height 1 mm [±0,1 mm]
Weight 0.15 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.32 kg / 3.16 N
Magnetic Induction ~ ? 232.88 mT / 2329 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x4x1 / 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 simulation of the assembly - report

These data are the result of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
MPL 5x4x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2327 Gs
232.7 mT
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
safe
1 mm 1559 Gs
155.9 mT
0.14 kg / 0.32 pounds
143.7 g / 1.4 N
safe
2 mm 876 Gs
87.6 mT
0.05 kg / 0.10 pounds
45.3 g / 0.4 N
safe
3 mm 488 Gs
48.8 mT
0.01 kg / 0.03 pounds
14.1 g / 0.1 N
safe
5 mm 177 Gs
17.7 mT
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
safe
10 mm 31 Gs
3.1 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
15 mm 10 Gs
1.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
20 mm 4 Gs
0.4 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Shear capacity (vertical surface)
MPL 5x4x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.06 kg / 0.14 pounds
64.0 g / 0.6 N
1 mm Stal (~0.2) 0.03 kg / 0.06 pounds
28.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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: Wall mounting (sliding) - behavior on slippery surfaces
MPL 5x4x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.10 kg / 0.21 pounds
96.0 g / 0.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.06 kg / 0.14 pounds
64.0 g / 0.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.16 kg / 0.35 pounds
160.0 g / 1.6 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 5x4x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
1 mm
25%
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
2 mm
50%
0.16 kg / 0.35 pounds
160.0 g / 1.6 N
3 mm
75%
0.24 kg / 0.53 pounds
240.0 g / 2.4 N
5 mm
100%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
10 mm
100%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
11 mm
100%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
12 mm
100%
0.32 kg / 0.71 pounds
320.0 g / 3.1 N

Table 5: Working in heat (stability) - power drop
MPL 5x4x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.32 kg / 0.71 pounds
320.0 g / 3.1 N
OK
40 °C -2.2% 0.31 kg / 0.69 pounds
313.0 g / 3.1 N
OK
60 °C -4.4% 0.31 kg / 0.67 pounds
305.9 g / 3.0 N
80 °C -6.6% 0.30 kg / 0.66 pounds
298.9 g / 2.9 N
100 °C -28.8% 0.23 kg / 0.50 pounds
227.8 g / 2.2 N

Table 6: Two magnets (attraction) - field collision
MPL 5x4x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.67 kg / 1.47 pounds
3 878 Gs
0.10 kg / 0.22 pounds
100 g / 1.0 N
N/A
1 mm 0.48 kg / 1.06 pounds
3 959 Gs
0.07 kg / 0.16 pounds
72 g / 0.7 N
0.43 kg / 0.96 pounds
~0 Gs
2 mm 0.30 kg / 0.66 pounds
3 118 Gs
0.04 kg / 0.10 pounds
45 g / 0.4 N
0.27 kg / 0.59 pounds
~0 Gs
3 mm 0.17 kg / 0.38 pounds
2 356 Gs
0.03 kg / 0.06 pounds
26 g / 0.3 N
0.15 kg / 0.34 pounds
~0 Gs
5 mm 0.05 kg / 0.12 pounds
1 302 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
0.05 kg / 0.10 pounds
~0 Gs
10 mm 0.00 kg / 0.01 pounds
355 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
63 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
5 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
3 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
2 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
1 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
1 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
1 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MPL 5x4x1 / N38

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

Table 8: Impact energy (cracking risk) - collision effects
MPL 5x4x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 46.59 km/h
(12.94 m/s)
0.01 J
30 mm 80.68 km/h
(22.41 m/s)
0.04 J
50 mm 104.16 km/h
(28.93 m/s)
0.06 J
100 mm 147.30 km/h
(40.92 m/s)
0.13 J

Table 9: Coating parameters (durability)
MPL 5x4x1 / 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 5x4x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 531 Mx 5.3 µWb
Pc Coefficient 0.29 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 5x4x1 / N38

Environment Effective steel pull Effect
Air (land) 0.32 kg Standard
Water (riverbed) 0.37 kg
(+0.05 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.
1. Shear force

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

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Heat tolerance

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.29

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%
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: 020169-2026
Measurement Calculator
Pulling force

Magnetic Field

See also proposals

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 5x4x1 mm and a weight of 0.15 g, guarantees the highest quality connection. This magnetic block with a force of 3.16 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, 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 0.32 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 5x4x1 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 0.32 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 5x4x1 / 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).
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 (5x4 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 5x4x1 mm, which, at a weight of 0.15 g, makes it an element with impressive energy density. The key parameter here is the lifting capacity amounting to approximately 0.32 kg (force ~3.16 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • Their magnetic field remains stable, and after around 10 years it decreases only by ~1% (theoretically),
  • Magnets very well defend themselves against demagnetization caused by foreign field sources,
  • The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnets are distinguished by maximum magnetic induction on the outer side,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in designing and the capacity to adapt to specific needs,
  • Significant place in modern industrial fields – they are used in data components, motor assemblies, precision medical tools, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Problematic aspects 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.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat affects it?

Information about lifting capacity was defined for optimal configuration, assuming:
  • on a block made of structural steel, effectively closing the magnetic flux
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no impurities)
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Lifting capacity in real conditions – factors

Effective lifting capacity is influenced by specific conditions, mainly (from priority):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.

Warnings
Risk of cracking

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Power loss in heat

Keep cool. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Dust is flammable

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

GPS Danger

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Adults only

Neodymium magnets are not suitable for play. Swallowing a few magnets may result in them attracting across intestines, which poses a severe health hazard and requires immediate surgery.

Bone fractures

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

Warning for allergy sufferers

Certain individuals suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling might lead to an allergic reaction. We strongly advise use safety gloves.

Electronic devices

Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

ICD Warning

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

Respect the power

Before use, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

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