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MPL 25x2x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020509

length

25 mm [±0,1 mm]

Width

2 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

2.25 g

Magnetization Direction

↑ axial

Load capacity

2.33 kg / 22.82 N

Magnetic Induction

558.90 mT / 5589 Gs

Coating

[NiCuNi] Nickel

0.713 with VAT / pcs + price for transport

0.580 ZŁ net + 23% VAT / pcs

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Detailed specification - MPL 25x2x6 / N38 - lamellar magnet

Specification / characteristics - MPL 25x2x6 / N38 - lamellar magnet

properties
properties values
Cat. no. 020509
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 25 mm [±0,1 mm]
Width 2 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 2.25 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.33 kg / 22.82 N
Magnetic Induction ~ ? 558.90 mT / 5589 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 25x2x6 / 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

Presented values represent the outcome of a engineering calculation. Values rely on algorithms for the material Nd2Fe14B. Operational parameters might slightly differ. Please consider these data as a reference point when designing systems.

Table 1: Static force (pull vs distance) - characteristics
MPL 25x2x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5574 Gs
557.4 mT
2.33 kg / 5.14 LBS
2330.0 g / 22.9 N
warning
1 mm 2599 Gs
259.9 mT
0.51 kg / 1.12 LBS
506.6 g / 5.0 N
safe
2 mm 1392 Gs
139.2 mT
0.15 kg / 0.32 LBS
145.3 g / 1.4 N
safe
3 mm 879 Gs
87.9 mT
0.06 kg / 0.13 LBS
58.0 g / 0.6 N
safe
5 mm 454 Gs
45.4 mT
0.02 kg / 0.03 LBS
15.5 g / 0.2 N
safe
10 mm 155 Gs
15.5 mT
0.00 kg / 0.00 LBS
1.8 g / 0.0 N
safe
15 mm 72 Gs
7.2 mT
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
safe
20 mm 39 Gs
3.9 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
safe
30 mm 15 Gs
1.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
50 mm 4 Gs
0.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Slippage load (wall)
MPL 25x2x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.47 kg / 1.03 LBS
466.0 g / 4.6 N
1 mm Stal (~0.2) 0.10 kg / 0.22 LBS
102.0 g / 1.0 N
2 mm Stal (~0.2) 0.03 kg / 0.07 LBS
30.0 g / 0.3 N
3 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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 25x2x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.70 kg / 1.54 LBS
699.0 g / 6.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.47 kg / 1.03 LBS
466.0 g / 4.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.23 kg / 0.51 LBS
233.0 g / 2.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.17 kg / 2.57 LBS
1165.0 g / 11.4 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 25x2x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.23 kg / 0.51 LBS
233.0 g / 2.3 N
1 mm
25%
0.58 kg / 1.28 LBS
582.5 g / 5.7 N
2 mm
50%
1.17 kg / 2.57 LBS
1165.0 g / 11.4 N
3 mm
75%
1.75 kg / 3.85 LBS
1747.5 g / 17.1 N
5 mm
100%
2.33 kg / 5.14 LBS
2330.0 g / 22.9 N
10 mm
100%
2.33 kg / 5.14 LBS
2330.0 g / 22.9 N
11 mm
100%
2.33 kg / 5.14 LBS
2330.0 g / 22.9 N
12 mm
100%
2.33 kg / 5.14 LBS
2330.0 g / 22.9 N

Table 5: Thermal stability (material behavior) - power drop
MPL 25x2x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.33 kg / 5.14 LBS
2330.0 g / 22.9 N
OK
40 °C -2.2% 2.28 kg / 5.02 LBS
2278.7 g / 22.4 N
OK
60 °C -4.4% 2.23 kg / 4.91 LBS
2227.5 g / 21.9 N
OK
80 °C -6.6% 2.18 kg / 4.80 LBS
2176.2 g / 21.3 N
100 °C -28.8% 1.66 kg / 3.66 LBS
1659.0 g / 16.3 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 25x2x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 9.58 kg / 21.12 LBS
5 924 Gs
1.44 kg / 3.17 LBS
1437 g / 14.1 N
N/A
1 mm 4.52 kg / 9.97 LBS
7 659 Gs
0.68 kg / 1.49 LBS
678 g / 6.7 N
4.07 kg / 8.97 LBS
~0 Gs
2 mm 2.08 kg / 4.59 LBS
5 198 Gs
0.31 kg / 0.69 LBS
312 g / 3.1 N
1.87 kg / 4.13 LBS
~0 Gs
3 mm 1.06 kg / 2.34 LBS
3 708 Gs
0.16 kg / 0.35 LBS
159 g / 1.6 N
0.95 kg / 2.10 LBS
~0 Gs
5 mm 0.37 kg / 0.81 LBS
2 179 Gs
0.05 kg / 0.12 LBS
55 g / 0.5 N
0.33 kg / 0.73 LBS
~0 Gs
10 mm 0.06 kg / 0.14 LBS
909 Gs
0.01 kg / 0.02 LBS
10 g / 0.1 N
0.06 kg / 0.13 LBS
~0 Gs
20 mm 0.01 kg / 0.02 LBS
311 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
46 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
29 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
20 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
14 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
10 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
8 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Hazards (implants) - warnings
MPL 25x2x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.0 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MPL 25x2x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 32.47 km/h
(9.02 m/s)
0.09 J
30 mm 56.21 km/h
(15.61 m/s)
0.27 J
50 mm 72.57 km/h
(20.16 m/s)
0.46 J
100 mm 102.63 km/h
(28.51 m/s)
0.91 J

Table 9: Surface protection spec
MPL 25x2x6 / 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 25x2x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 608 Mx 26.1 µWb
Pc Coefficient 0.76 High (Stable)

Table 11: Hydrostatics and buoyancy
MPL 25x2x6 / N38

Environment Effective steel pull Effect
Air (land) 2.33 kg Standard
Water (riverbed) 2.67 kg
(+0.34 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.
1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 0.76

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
Elemental analysis
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: 020509-2026
Measurement Calculator
Force (pull)

Magnetic Field

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Component MPL 25x2x6 / N38 features a low profile and industrial pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 2.33 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures 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 2.33 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 25x2x6 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
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.
Standardly, the MPL 25x2x6 / N38 model is magnetized axially (dimension 6 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 25x2x6 mm, which, at a weight of 2.25 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 2.33 kg (force ~22.82 N), which, with such a flat shape, proves the high power of the material. 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 stable power, and over around ten years their performance decreases symbolically – ~1% (in testing),
  • Magnets perfectly resist against loss of magnetization caused by foreign field sources,
  • By covering with a reflective layer of nickel, the element presents an aesthetic look,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • In view of the ability of flexible forming and adaptation to specialized requirements, NdFeB magnets can be modeled in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in future technologies – they are commonly used in magnetic memories, electric motors, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects 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 power 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 rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Lifting parameters

Detachment force of the magnet in optimal conditionswhat contributes to it?

The load parameter shown represents the peak performance, measured under laboratory conditions, specifically:
  • with the application of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose thickness reaches at least 10 mm
  • with a surface free of scratches
  • without the slightest air gap between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at room temperature

Practical lifting capacity: influencing factors

It is worth knowing that the magnet holding will differ subject to elements below, starting with the most relevant:
  • Gap (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Warnings
Beware of splinters

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them cracking into shards.

Physical harm

Big blocks can crush fingers instantly. Never put your hand between two attracting surfaces.

Safe operation

Handle magnets consciously. Their huge power can surprise even professionals. Plan your moves and respect their force.

Phone sensors

Note: rare earth magnets generate a field that interferes with sensitive sensors. Maintain a separation from your phone, device, and GPS.

Warning for allergy sufferers

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact and choose encased magnets.

Fire warning

Powder produced during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Do not give to children

Only for adults. Small elements pose a choking risk, leading to intestinal necrosis. Store away from children and animals.

Warning for heart patients

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Electronic hazard

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Do not overheat magnets

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Safety First! More info about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98