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MPL 5x5x1.2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020171

GTIN/EAN: 5906301811770

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.2 mm [±0,1 mm]

Weight

0.22 g

Magnetization Direction

↑ axial

Load capacity

0.44 kg / 4.28 N

Magnetic Induction

245.17 mT / 2452 Gs

Coating

[NiCuNi] Nickel

0.1845 with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - MPL 5x5x1.2 / N38 - lamellar magnet

Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020171
GTIN/EAN 5906301811770
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 5 mm [±0,1 mm]
Height 1.2 mm [±0,1 mm]
Weight 0.22 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.44 kg / 4.28 N
Magnetic Induction ~ ? 245.17 mT / 2452 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.2 / 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 simulation of the assembly - technical parameters

These information are the result of a mathematical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs gap) - interaction chart
MPL 5x5x1.2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2450 Gs
245.0 mT
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
safe
1 mm 1739 Gs
173.9 mT
0.22 kg / 0.49 pounds
221.8 g / 2.2 N
safe
2 mm 1054 Gs
105.4 mT
0.08 kg / 0.18 pounds
81.4 g / 0.8 N
safe
3 mm 622 Gs
62.2 mT
0.03 kg / 0.06 pounds
28.4 g / 0.3 N
safe
5 mm 241 Gs
24.1 mT
0.00 kg / 0.01 pounds
4.3 g / 0.0 N
safe
10 mm 45 Gs
4.5 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
15 mm 15 Gs
1.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
20 mm 7 Gs
0.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
30 mm 2 Gs
0.2 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 5x5x1.2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.19 pounds
88.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.10 pounds
44.0 g / 0.4 N
2 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 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: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 5x5x1.2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.29 pounds
132.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.19 pounds
88.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.22 kg / 0.49 pounds
220.0 g / 2.2 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 5x5x1.2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.24 pounds
110.0 g / 1.1 N
2 mm
50%
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
3 mm
75%
0.33 kg / 0.73 pounds
330.0 g / 3.2 N
5 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
10 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
11 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
12 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N

Table 5: Thermal resistance (material behavior) - power drop
MPL 5x5x1.2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.44 kg / 0.97 pounds
440.0 g / 4.3 N
OK
40 °C -2.2% 0.43 kg / 0.95 pounds
430.3 g / 4.2 N
OK
60 °C -4.4% 0.42 kg / 0.93 pounds
420.6 g / 4.1 N
80 °C -6.6% 0.41 kg / 0.91 pounds
411.0 g / 4.0 N
100 °C -28.8% 0.31 kg / 0.69 pounds
313.3 g / 3.1 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 5x5x1.2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.92 kg / 2.04 pounds
4 027 Gs
0.14 kg / 0.31 pounds
139 g / 1.4 N
N/A
1 mm 0.70 kg / 1.54 pounds
4 260 Gs
0.10 kg / 0.23 pounds
105 g / 1.0 N
0.63 kg / 1.39 pounds
~0 Gs
2 mm 0.47 kg / 1.03 pounds
3 478 Gs
0.07 kg / 0.15 pounds
70 g / 0.7 N
0.42 kg / 0.93 pounds
~0 Gs
3 mm 0.29 kg / 0.63 pounds
2 734 Gs
0.04 kg / 0.10 pounds
43 g / 0.4 N
0.26 kg / 0.57 pounds
~0 Gs
5 mm 0.10 kg / 0.22 pounds
1 617 Gs
0.02 kg / 0.03 pounds
15 g / 0.1 N
0.09 kg / 0.20 pounds
~0 Gs
10 mm 0.01 kg / 0.02 pounds
482 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
90 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
7 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
4 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
3 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
2 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: Safety (HSE) (electronics) - warnings
MPL 5x5x1.2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.5 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) 1.5 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 (kinetic energy) - warning
MPL 5x5x1.2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 45.11 km/h
(12.53 m/s)
0.02 J
30 mm 78.12 km/h
(21.70 m/s)
0.05 J
50 mm 100.85 km/h
(28.01 m/s)
0.09 J
100 mm 142.63 km/h
(39.62 m/s)
0.17 J

Table 9: Corrosion resistance
MPL 5x5x1.2 / 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 5x5x1.2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 695 Mx 7.0 µWb
Pc Coefficient 0.30 Low (Flat)

Table 11: Physics of underwater searching
MPL 5x5x1.2 / N38

Environment Effective steel pull Effect
Air (land) 0.44 kg Standard
Water (riverbed) 0.50 kg
(+0.06 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. Sliding resistance

*Note: On a vertical surface, the magnet retains only a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Power loss vs temp

*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) = 0.30

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%
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: 020171-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other deals

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 5x5x1.2 mm and a weight of 0.22 g, guarantees the highest quality connection. This rectangular block with a force of 4.28 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 shifting 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. To separate the MPL 5x5x1.2 / 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. 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. Thanks to the flat surface and high force (approx. 0.44 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. 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).
Standardly, the MPL 5x5x1.2 / N38 model is magnetized through the thickness (dimension 1.2 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 5x5x1.2 mm, which, at a weight of 0.22 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 5x5x1.2 mm and a self-weight of 0.22 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of Nd2Fe14B magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (based on calculations),
  • They have excellent resistance to magnetism drop when exposed to external fields,
  • A magnet with a shiny nickel surface has an effective appearance,
  • Magnetic induction on the working part of the magnet remains very high,
  • 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...
  • Possibility of precise forming as well as adapting to specific conditions,
  • Wide application in innovative solutions – they serve a role in magnetic memories, brushless drives, precision medical tools, also technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. 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
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of making threads in the magnet and complicated shapes - preferred is cover - magnetic holder.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The declared magnet strength refers to the peak performance, measured under ideal test conditions, namely:
  • with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose thickness equals approx. 10 mm
  • characterized by lack of roughness
  • without any clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

It is worth knowing that the application force will differ subject to elements below, starting with the most relevant:
  • Distance – existence of foreign body (paint, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Protect data

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Pacemakers

For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Respect the power

Exercise caution. Neodymium magnets act from a long distance and snap with massive power, often faster than you can move away.

This is not a toy

NdFeB magnets are not toys. Eating multiple magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates urgent medical intervention.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop handling magnets and wear gloves.

Demagnetization risk

Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.

Crushing risk

Risk of injury: The attraction force is so great that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Flammability

Mechanical processing of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Keep away from electronics

A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Maintain magnets near a device to prevent damaging the sensors.

Beware of splinters

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Danger! Learn more about hazards in the article: Magnet Safety Guide.