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MPL 5x5x1.5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020172

GTIN/EAN: 5906301811787

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.28 g

Magnetization Direction

↑ axial

Load capacity

0.58 kg / 5.68 N

Magnetic Induction

293.49 mT / 2935 Gs

Coating

[NiCuNi] Nickel

technical parameters »

0.1845 ZŁ with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Technical parameters - MPL 5x5x1.5 / N38 - lamellar magnet

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

properties
properties values
Cat. no. 020172
GTIN/EAN 5906301811787
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 1.5 mm [±0,1 mm]
Weight 0.28 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.58 kg / 5.68 N
Magnetic Induction ~ ? 293.49 mT / 2935 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.5 / 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 modeling of the product - technical parameters

The following data are the result of a mathematical simulation. Values rely on algorithms for the material Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap for designers.

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

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2932 Gs
293.2 mT
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
 safe
1 mm 2036 Gs
203.6 mT
 0.28 kg / 0.62 lbs
279.6 g / 2.7 N
 safe
2 mm 1228 Gs
122.8 mT
 0.10 kg / 0.22 lbs
101.7 g / 1.0 N
 safe
3 mm 727 Gs
72.7 mT
 0.04 kg / 0.08 lbs
35.7 g / 0.3 N
 safe
5 mm 285 Gs
28.5 mT
 0.01 kg / 0.01 lbs
5.5 g / 0.1 N
 safe
10 mm 54 Gs
5.4 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 safe
15 mm 18 Gs
1.8 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
20 mm 8 Gs
0.8 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
30 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Grip strength weakens significantly per each millimeter of gap. Remember that even a microscopic distance (e.g., dirt, varnish, veneer) significantly weakens the grip. Magnets hold strongest during direct contact; gap kills the force. See how rapidly the parameters fall, when the magnet does not touch flatly to the steel surface. When designing the assembly, avoid additional spacers.

Table 2: Sliding hold (vertical surface)
MPL 5x5x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.12 kg / 0.26 lbs
116.0 g / 1.1 N
1 mm Stal (~0.2) 0.06 kg / 0.12 lbs
56.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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
The following data defines the approximate force necessary to start the slippage of the magnet downwards along a upright metal surface (assuming typical friction). This parameter depends on the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MPL 5x5x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.12 kg / 0.26 lbs
116.0 g / 1.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.06 kg / 0.13 lbs
58.0 g / 0.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.29 kg / 0.64 lbs
290.0 g / 2.8 N
When mounting a magnet on a vertical surface (e.g., a fridge), it will maintain barely approx. 20%-30% of its nominal power. Gravity and a low friction coefficient influence the fact that magnets slip easier than they detach. Want to create a wall mount? Note that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the holder will slip down under a significantly smaller load. Utilizing a rubberized layer can effectively improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 5x5x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.06 kg / 0.13 lbs
58.0 g / 0.6 N
1 mm
25%
 0.15 kg / 0.32 lbs
145.0 g / 1.4 N
2 mm
50%
 0.29 kg / 0.64 lbs
290.0 g / 2.8 N
3 mm
75%
 0.43 kg / 0.96 lbs
435.0 g / 4.3 N
5 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
10 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
11 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
12 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
A thin metal plate cannot conduct the entire magnetic field, which wastes potential of the holder. Should you mount a strong magnet to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To squeeze the maximum of this magnet's power, you need a suitably thick backing of metal. The saturation effect causes that on thin elements (e.g., appliance housings), the holder shows lower pull force. We suggest choosing the steel cross-section according to the table below.

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

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
 OK
40 °C -2.2% 0.57 kg / 1.25 lbs
567.2 g / 5.6 N
 OK
60 °C -4.4% 0.55 kg / 1.22 lbs
554.5 g / 5.4 N
80 °C -6.6% 0.54 kg / 1.19 lbs
541.7 g / 5.3 N
100 °C -28.8% 0.41 kg / 0.91 lbs
413.0 g / 4.1 N
Ordinary NdFeB products irreversibly lose strength after exceeding the maximum temperature. Protect against heat – heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's force briefly drops. Refrain from using this magnet in hot environments exceeding its safe range. Exceeding the critical threshold will result in irreversible degradation of magnetism.
*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (pancake types) may lose charge permanently under lower heat stress compared to rod magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 5x5x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.33 kg / 2.92 lbs
4 518 Gs
0.20 kg / 0.44 lbs
199 g / 1.9 N
 N/A
1 mm 0.97 kg / 2.15 lbs
5 027 Gs
0.15 kg / 0.32 lbs
146 g / 1.4 N
 0.88 kg / 1.93 lbs
~0 Gs
2 mm 0.64 kg / 1.41 lbs
4 071 Gs
0.10 kg / 0.21 lbs
96 g / 0.9 N
 0.57 kg / 1.27 lbs
~0 Gs
3 mm 0.39 kg / 0.86 lbs
3 188 Gs
0.06 kg / 0.13 lbs
59 g / 0.6 N
 0.35 kg / 0.78 lbs
~0 Gs
5 mm 0.14 kg / 0.30 lbs
1 886 Gs
0.02 kg / 0.05 lbs
21 g / 0.2 N
 0.12 kg / 0.27 lbs
~0 Gs
10 mm 0.01 kg / 0.03 lbs
569 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
108 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
9 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
5 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
3 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
2 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
2 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
Two magnetic products interact from a much further distance than a neodymium and metal combination. The setup of magnet-to-magnet produces a massive flux and a wider radius of action. Designing a strong closure? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the impact force is extreme. The repulsion force is slightly lower than the connection force, but still significant.
*The magnetic induction between like poles is approximately ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
* Calculations demonstrate sliding force of dual same magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - warnings
MPL 5x5x1.5 / 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
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation is a serious hazard to electronics and pacemakers. These NdFeB products generate a flux that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field acts through matter and plastic. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, remotes, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MPL 5x5x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 45.91 km/h
(12.75 m/s)
 0.02 J
30 mm 79.50 km/h
(22.08 m/s)
 0.07 J
50 mm 102.64 km/h
(28.51 m/s)
 0.11 J
100 mm 145.15 km/h
(40.32 m/s)
 0.23 J
Neodymium magnets are prone to chipping – a collision with steel causes immediate chipping. Watch the impact speed – a magnet released freely becomes dangerous. Impact energy can cause material chips or injury to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Surface protection spec
MPL 5x5x1.5 / 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)
The following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MPL 5x5x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 799 Mx 8.0 µWb
Pc Coefficient 0.36 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data when building generators and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 5x5x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.58 kg Standard
Water (riverbed) 0.66 kg
(+0.08 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.
1. Shear force

*Warning: On a vertical wall, the magnet retains merely a fraction of its max power.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.

3. Power loss vs temp

*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) = 0.36

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: 020172-2026
Magnet Unit Converter
Pulling force
Magnetic Induction
Input your figure into any field, to see all other values convert on the fly.

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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 5x5x1.5 mm and a weight of 0.28 g, guarantees the highest quality connection. This rectangular block with a force of 5.68 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 strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 0.58 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 wind generators and material handling systems. Thanks to the flat surface and high force (approx. 0.58 kg), they are ideal as hidden locks 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. Remember to clean and degrease 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. In practice, this means that this magnet has the greatest attraction force on its main planes (5x5 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.
The presented product is a neodymium magnet with precisely defined parameters: 5 mm (length), 5 mm (width), and 1.5 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 0.58 kg (force ~5.68 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

Besides their exceptional pulling force, neodymium magnets offer the following advantages:
  • They do not lose power, even over nearly 10 years – the reduction in power is only ~1% (based on measurements),
  • Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
  • The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of accurate forming and modifying to precise requirements,
  • Wide application in modern technologies – they are utilized in HDD drives, drive modules, precision medical tools, as well as other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets and ways of using them
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose their power 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, assuming:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by even structure
  • with total lack of distance (no impurities)
  • for force acting at a right angle (in the magnet axis)
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the magnet holding will differ influenced by the following factors, starting with the most relevant:
  • Gap (between the magnet and the metal), because even a very small clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material type – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

H&S for magnets
Keep away from children

NdFeB magnets are not intended for children. Eating multiple magnets may result in them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.

Maximum temperature

Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and pulling force.

Respect the power

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Mechanical processing

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

Cards and drives

Do not bring magnets close to a purse, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

ICD Warning

For implant holders: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Protective goggles

NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them breaking into shards.

Magnetic interference

A powerful magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a device to avoid breaking the sensors.

Hand protection

Big blocks can smash fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.

Metal Allergy

A percentage of the population experience a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling can result in an allergic reaction. We recommend use protective gloves.

Danger! Need more info? Check our post: Are neodymium magnets dangerous?