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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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Technical parameters of the product - 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

Technical analysis of the assembly - data

The following values are the outcome of a physical analysis. Values rely on models for the class Nd2Fe14B. Operational performance might slightly differ. Use these calculations as a supplementary guide when designing systems.

Table 1: Static 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 lbs
320.0 g / 3.1 N
safe
1 mm 1559 Gs
155.9 mT
0.14 kg / 0.32 lbs
143.7 g / 1.4 N
safe
2 mm 876 Gs
87.6 mT
0.05 kg / 0.10 lbs
45.3 g / 0.4 N
safe
3 mm 488 Gs
48.8 mT
0.01 kg / 0.03 lbs
14.1 g / 0.1 N
safe
5 mm 177 Gs
17.7 mT
0.00 kg / 0.00 lbs
1.9 g / 0.0 N
safe
10 mm 31 Gs
3.1 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe
15 mm 10 Gs
1.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
20 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Sliding hold (wall)
MPL 5x4x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.06 kg / 0.14 lbs
64.0 g / 0.6 N
1 mm Stal (~0.2) 0.03 kg / 0.06 lbs
28.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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

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 lbs
96.0 g / 0.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.06 kg / 0.14 lbs
64.0 g / 0.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.16 kg / 0.35 lbs
160.0 g / 1.6 N

Table 4: Steel thickness (substrate influence) - power losses
MPL 5x4x1 / N38

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

Table 5: Working in heat (material behavior) - resistance threshold
MPL 5x4x1 / N38

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

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 5x4x1 / N38

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

Table 7: Protective zones (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
Timepiece 20 Gs (2.0 mT) 1.5 cm
Mobile device 40 Gs (4.0 mT) 1.0 cm
Remote 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: Dynamics (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: Construction data (Flux)
MPL 5x4x1 / N38

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

Table 11: Submerged application
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical surface, the magnet retains just ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 0.29

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 and environmental data
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%
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: 020169-2026
Measurement Calculator
Pulling force

Field Strength

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Model MPL 5x4x1 / N38 features a low profile and industrial pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 0.32 kg), this product is available off-the-shelf from our warehouse in Poland. 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 5x4x1 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, 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.
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 closers in furniture making and mounting elements in automation. 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. 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. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 5x4x1 mm, which, at a weight of 0.15 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 5x4x1 mm and a self-weight of 0.15 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros as well as cons of neodymium magnets.

Pros

Apart from their superior magnetic energy, neodymium magnets have these key benefits:
  • Their power is durable, and after approximately 10 years it drops only by ~1% (theoretically),
  • Magnets perfectly defend themselves against demagnetization caused by external fields,
  • By applying a reflective layer of nickel, the element gains an modern look,
  • Magnets have excellent magnetic induction on the outer side,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Considering the possibility of free molding and adaptation to custom solutions, neodymium magnets can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Universal use in modern technologies – they are commonly used in hard drives, brushless drives, advanced medical instruments, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 immune to moisture, when using outdoors
  • Due to limitations in producing nuts and complicated forms in magnets, we recommend using a housing - magnetic holder.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can disrupt the diagnostic process medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Lifting parameters

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

Information about lifting capacity was defined for ideal contact conditions, assuming:
  • using a base made of low-carbon steel, functioning as a ideal flux conductor
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • without any clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Practical lifting capacity: influencing factors

Holding efficiency is affected by working environment parameters, mainly (from priority):
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – insufficiently thick steel causes magnetic saturation, causing part of the power to be escaped into the air.
  • Material composition – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the holding force.

Warnings
GPS Danger

A powerful magnetic field interferes with the operation of magnetometers in phones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.

Conscious usage

Exercise caution. Rare earth magnets act from a distance and connect with huge force, often faster than you can move away.

Fragile material

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.

Maximum temperature

Do not overheat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Warning for heart patients

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Keep away from computers

Avoid bringing magnets near a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.

Allergy Warning

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease handling magnets and wear gloves.

Do not drill into magnets

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Keep away from children

Adult use only. Small elements can be swallowed, leading to severe trauma. Store out of reach of kids and pets.

Physical harm

Large magnets can smash fingers instantly. Under no circumstances place your hand between two strong magnets.

Security! Details about risks in the article: Magnet Safety Guide.