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MPL 5x5x1.5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020172

GTIN/EAN: 5906301811787

5.00
Load capacity 0.58 kg / 5.68 N Magnetic Induction 293.49 mT / 2935 Gs
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
Coating
[NiCuNi] Nickel
technical specifications »

0.1845 zł with VAT / pcs + price for transport

0.1500 zł net + 23% VAT / pcs

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Technical of the product - 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 magnet - technical parameters

The following values constitute the direct effect of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static pull force (force vs distance) - power drop
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 pounds
580.0 g / 5.7 N
 low risk
1 mm 2036 Gs
203.6 mT
 0.28 kg / 0.62 pounds
279.6 g / 2.7 N
 low risk
2 mm 1228 Gs
122.8 mT
 0.10 kg / 0.22 pounds
101.7 g / 1.0 N
 low risk
3 mm 727 Gs
72.7 mT
 0.04 kg / 0.08 pounds
35.7 g / 0.3 N
 low risk
5 mm 285 Gs
28.5 mT
 0.01 kg / 0.01 pounds
5.5 g / 0.1 N
 low risk
10 mm 54 Gs
5.4 mT
 0.00 kg / 0.00 pounds
0.2 g / 0.0 N
 low risk
15 mm 18 Gs
1.8 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
20 mm 8 Gs
0.8 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
30 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
Grip strength decreases drastically with every mm of spacing. Remember that even a very thin break (e.g., contamination, paint, rust) significantly reduces the pull force. Neodymiums work strongest at the point of direct contact; distance nullifies the power. Observe how rapidly the parameters fall, when the product does not touch tightly to the steel surface. When calculating the assembly, discard additional spacers.

Table 2: Vertical 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 pounds
116.0 g / 1.1 N
1 mm Stal (~0.2) 0.06 kg / 0.12 pounds
56.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 pounds
20.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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
The table below defines the approximate weight limit required to initiate the downward movement of the magnet down on a vertical steel plate (considering standard friction). This value varies with the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
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 pounds
174.0 g / 1.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.12 kg / 0.26 pounds
116.0 g / 1.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.06 kg / 0.13 pounds
58.0 g / 0.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.29 kg / 0.64 pounds
290.0 g / 2.8 N
When hanging a holder on a vertical surface (e.g., a fridge), it will only hold only about 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient cause that holders move down faster than they pull off. Designing a vertical fastening? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a smooth steel, the element will slip down under a much lighter load. Application of an anti-slip layer can drastically 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 pounds
58.0 g / 0.6 N
1 mm
25%
 0.15 kg / 0.32 pounds
145.0 g / 1.4 N
2 mm
50%
 0.29 kg / 0.64 pounds
290.0 g / 2.8 N
3 mm
75%
 0.43 kg / 0.96 pounds
435.0 g / 4.3 N
5 mm
100%
 0.58 kg / 1.28 pounds
580.0 g / 5.7 N
10 mm
100%
 0.58 kg / 1.28 pounds
580.0 g / 5.7 N
11 mm
100%
 0.58 kg / 1.28 pounds
580.0 g / 5.7 N
12 mm
100%
 0.58 kg / 1.28 pounds
580.0 g / 5.7 N
A too thin steel is incapable of focus the entire magnetic field, which wastes potential of the magnet. Should you install a neodymium to a thin surface, the flux will penetrate right through and the pull force will drop sharply. To utilize 100% of this magnet's potential, you need a suitably thick piece of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the magnet works worse. We advise picking the steel cross-section based on the following data.

Table 5: Working in heat (stability) - resistance threshold
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 pounds
580.0 g / 5.7 N
 OK
40 °C -2.2% 0.57 kg / 1.25 pounds
567.2 g / 5.6 N
 OK
60 °C -4.4% 0.55 kg / 1.22 pounds
554.5 g / 5.4 N
80 °C -6.6% 0.54 kg / 1.19 pounds
541.7 g / 5.3 N
100 °C -28.8% 0.41 kg / 0.91 pounds
413.0 g / 4.1 N
Standard neodymium magnets lose strength above the temperature limit. Watch out for overheating – high temperature can permanently damage this magnet. With increasing heat, the neodymium's power briefly lowers. Do not use this magnet in hot environments exceeding its working range. Too high temperature will cause permanent loss of magnetic properties.
*Important note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. Red status in the table signals a risk of irreversible loss for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.33 kg / 2.92 pounds
4 518 Gs
0.20 kg / 0.44 pounds
199 g / 1.9 N
 N/A
1 mm 0.97 kg / 2.15 pounds
5 027 Gs
0.15 kg / 0.32 pounds
146 g / 1.4 N
 0.88 kg / 1.93 pounds
~0 Gs
2 mm 0.64 kg / 1.41 pounds
4 071 Gs
0.10 kg / 0.21 pounds
96 g / 0.9 N
 0.57 kg / 1.27 pounds
~0 Gs
3 mm 0.39 kg / 0.86 pounds
3 188 Gs
0.06 kg / 0.13 pounds
59 g / 0.6 N
 0.35 kg / 0.78 pounds
~0 Gs
5 mm 0.14 kg / 0.30 pounds
1 886 Gs
0.02 kg / 0.05 pounds
21 g / 0.2 N
 0.12 kg / 0.27 pounds
~0 Gs
10 mm 0.01 kg / 0.03 pounds
569 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
 0.01 kg / 0.02 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
108 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
9 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
5 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
2 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
Two magnetic products attract each other from a significantly greater distance than a magnet and steel combination. The connection of two magnets generates a stronger field and a wider radius of performance. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the collision energy is massive. The repulsion force is marginally weaker than the attraction, but still significant.
*Field value in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Attention: Calculations apply to sliding force of dual matching 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
Mechanical watch 20 Gs (2.0 mT) 1.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Remote 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 poses a real danger to IT equipment and pacemakers. These neodymiums generate a flux that destroys function of digital equipment. Remember: the unseen radiation acts through matter and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MPL 5x5x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.39 km/h
(7.05 m/s)
 0.01 J
30 mm 25.39 km/h
(7.05 m/s)
 0.01 J
50 mm 25.37 km/h
(7.05 m/s)
 0.01 J
100 mm 25.40 km/h
(7.05 m/s)
 0.01 J
NdFeB products are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or dangerous crushing to fingers. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when playing with powerful specimens.

Table 9: Coating parameters (durability)
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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

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)
Flux value emitted by the pole surface. Essential parameter in coil applications and motors. Pc value defines 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%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Note: On a vertical wall, the magnet holds merely approx. 20-30% of its nominal pull.

2. Steel saturation

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

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.36

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

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: 020172-2026
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Component MPL 5x5x1.5 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 0.58 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
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.
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 (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). It is a magnetic block with dimensions 5x5x1.5 mm and a self-weight of 0.28 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They do not lose their magnetic properties even under external field action,
  • In other words, due to the reflective layer of nickel, the element gains a professional look,
  • Magnetic induction on the top side of the magnet turns out to be exceptional,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to freedom in constructing and the capacity to modify to unusual requirements,
  • Significant place in electronics industry – they are used in HDD drives, electromotive mechanisms, advanced medical instruments, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in miniature devices

Cons

Drawbacks and weaknesses 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 shields the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Possible danger to health – tiny shards of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these magnets can complicate diagnosis medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Highest magnetic holding force – what contributes to it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • using a plate made of mild steel, functioning as a magnetic yoke
  • with a thickness of at least 10 mm
  • with a surface free of scratches
  • with direct contact (without impurities)
  • during detachment in a direction vertical to the plane
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Real force impacted by specific conditions, including (from priority):
  • Gap (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin steel does not accept the full field, causing part of the power to be escaped to the other side.
  • Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic permeability and holding force.
  • Surface finish – full contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the holding force.

Precautions when working with NdFeB magnets
Mechanical processing

Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

GPS and phone interference

Be aware: neodymium magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Power loss in heat

Keep cool. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Material brittleness

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Pinching danger

Pinching hazard: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

ICD Warning

Health Alert: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Product not for children

These products are not intended for children. Accidental ingestion of several magnets may result in them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Safe operation

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Nickel allergy

A percentage of the population have a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to dermatitis. We suggest use safety gloves.

Threat to electronics

Do not bring magnets near a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Security! Learn more about risks in the article: Safety of working with magnets.