Product available Ships today (order by 14:00)

MPL 25x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020135

GTIN/EAN: 5906301811411

5.00

length

25 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

9.38 g

Magnetization Direction

↑ axial

Load capacity

7.49 kg / 73.45 N

Magnetic Induction

337.05 mT / 3371 Gs

Coating

[NiCuNi] Nickel

4.66 with VAT / pcs + price for transport

3.79 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
3.79 ZŁ
4.66 ZŁ
price from 200 pcs
3.56 ZŁ
4.38 ZŁ
price from 700 pcs
3.34 ZŁ
4.10 ZŁ
Looking for a better price?

Give us a call +48 22 499 98 98 alternatively let us know using our online form the contact page.
Weight as well as shape of magnetic components can be checked using our modular calculator.

Orders submitted before 14:00 will be dispatched today!

Technical data of the product - MPL 25x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 25x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020135
GTIN/EAN 5906301811411
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 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 9.38 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.49 kg / 73.45 N
Magnetic Induction ~ ? 337.05 mT / 3371 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 25x10x5 / 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 product - report

These information represent the direct effect of a physical analysis. Values rely on models for the material Nd2Fe14B. Operational performance may differ from theoretical values. Treat these data as a reference point for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MPL 25x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3369 Gs
336.9 mT
7.49 kg / 16.51 LBS
7490.0 g / 73.5 N
strong
1 mm 2932 Gs
293.2 mT
5.67 kg / 12.51 LBS
5673.2 g / 55.7 N
strong
2 mm 2479 Gs
247.9 mT
4.06 kg / 8.94 LBS
4056.9 g / 39.8 N
strong
3 mm 2065 Gs
206.5 mT
2.81 kg / 6.21 LBS
2814.7 g / 27.6 N
strong
5 mm 1419 Gs
141.9 mT
1.33 kg / 2.93 LBS
1328.6 g / 13.0 N
safe
10 mm 603 Gs
60.3 mT
0.24 kg / 0.53 LBS
240.3 g / 2.4 N
safe
15 mm 296 Gs
29.6 mT
0.06 kg / 0.13 LBS
57.8 g / 0.6 N
safe
20 mm 162 Gs
16.2 mT
0.02 kg / 0.04 LBS
17.4 g / 0.2 N
safe
30 mm 62 Gs
6.2 mT
0.00 kg / 0.01 LBS
2.5 g / 0.0 N
safe
50 mm 16 Gs
1.6 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
safe

Table 2: Slippage force (vertical surface)
MPL 25x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.50 kg / 3.30 LBS
1498.0 g / 14.7 N
1 mm Stal (~0.2) 1.13 kg / 2.50 LBS
1134.0 g / 11.1 N
2 mm Stal (~0.2) 0.81 kg / 1.79 LBS
812.0 g / 8.0 N
3 mm Stal (~0.2) 0.56 kg / 1.24 LBS
562.0 g / 5.5 N
5 mm Stal (~0.2) 0.27 kg / 0.59 LBS
266.0 g / 2.6 N
10 mm Stal (~0.2) 0.05 kg / 0.11 LBS
48.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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) - vertical pull
MPL 25x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.25 kg / 4.95 LBS
2247.0 g / 22.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.50 kg / 3.30 LBS
1498.0 g / 14.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.75 kg / 1.65 LBS
749.0 g / 7.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.75 kg / 8.26 LBS
3745.0 g / 36.7 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 25x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.75 kg / 1.65 LBS
749.0 g / 7.3 N
1 mm
25%
1.87 kg / 4.13 LBS
1872.5 g / 18.4 N
2 mm
50%
3.75 kg / 8.26 LBS
3745.0 g / 36.7 N
3 mm
75%
5.62 kg / 12.38 LBS
5617.5 g / 55.1 N
5 mm
100%
7.49 kg / 16.51 LBS
7490.0 g / 73.5 N
10 mm
100%
7.49 kg / 16.51 LBS
7490.0 g / 73.5 N
11 mm
100%
7.49 kg / 16.51 LBS
7490.0 g / 73.5 N
12 mm
100%
7.49 kg / 16.51 LBS
7490.0 g / 73.5 N

Table 5: Working in heat (stability) - power drop
MPL 25x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.49 kg / 16.51 LBS
7490.0 g / 73.5 N
OK
40 °C -2.2% 7.33 kg / 16.15 LBS
7325.2 g / 71.9 N
OK
60 °C -4.4% 7.16 kg / 15.79 LBS
7160.4 g / 70.2 N
80 °C -6.6% 7.00 kg / 15.42 LBS
6995.7 g / 68.6 N
100 °C -28.8% 5.33 kg / 11.76 LBS
5332.9 g / 52.3 N

Table 6: Two magnets (repulsion) - field range
MPL 25x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 17.49 kg / 38.57 LBS
4 785 Gs
2.62 kg / 5.78 LBS
2624 g / 25.7 N
N/A
1 mm 15.37 kg / 33.89 LBS
6 316 Gs
2.31 kg / 5.08 LBS
2306 g / 22.6 N
13.84 kg / 30.50 LBS
~0 Gs
2 mm 13.25 kg / 29.21 LBS
5 864 Gs
1.99 kg / 4.38 LBS
1987 g / 19.5 N
11.92 kg / 26.29 LBS
~0 Gs
3 mm 11.26 kg / 24.83 LBS
5 407 Gs
1.69 kg / 3.72 LBS
1690 g / 16.6 N
10.14 kg / 22.35 LBS
~0 Gs
5 mm 7.91 kg / 17.44 LBS
4 531 Gs
1.19 kg / 2.62 LBS
1187 g / 11.6 N
7.12 kg / 15.70 LBS
~0 Gs
10 mm 3.10 kg / 6.84 LBS
2 838 Gs
0.47 kg / 1.03 LBS
465 g / 4.6 N
2.79 kg / 6.16 LBS
~0 Gs
20 mm 0.56 kg / 1.24 LBS
1 207 Gs
0.08 kg / 0.19 LBS
84 g / 0.8 N
0.51 kg / 1.11 LBS
~0 Gs
50 mm 0.01 kg / 0.03 LBS
194 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
0.01 kg / 0.03 LBS
~0 Gs
60 mm 0.01 kg / 0.01 LBS
124 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.01 LBS
84 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
59 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
43 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
32 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 25x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.0 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Timepiece 20 Gs (2.0 mT) 5.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.0 cm
Car key 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (kinetic energy) - warning
MPL 25x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 29.06 km/h
(8.07 m/s)
0.31 J
30 mm 49.37 km/h
(13.71 m/s)
0.88 J
50 mm 63.73 km/h
(17.70 m/s)
1.47 J
100 mm 90.12 km/h
(25.03 m/s)
2.94 J

Table 9: Corrosion resistance
MPL 25x10x5 / 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 25x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 8 245 Mx 82.5 µWb
Pc Coefficient 0.38 Low (Flat)

Table 11: Physics of underwater searching
MPL 25x10x5 / N38

Environment Effective steel pull Effect
Air (land) 7.49 kg Standard
Water (riverbed) 8.58 kg
(+1.09 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Warning: On a vertical surface, the magnet holds just a fraction of its perpendicular strength.

2. Steel thickness impact

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

3. Heat tolerance

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.38

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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
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: 020135-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other offers

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 25x10x5 mm and a weight of 9.38 g, guarantees the highest quality connection. As a block magnet with high power (approx. 7.49 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 25x10x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, 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.
Plate magnets MPL 25x10x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as invisible mounts 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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 25x10x5 / N38 model is magnetized through the thickness (dimension 5 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. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 25 mm (length), 10 mm (width), and 5 mm (thickness). It is a magnetic block with dimensions 25x10x5 mm and a self-weight of 9.38 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • Thanks to the elegant finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an professional appearance,
  • Magnets have excellent magnetic induction on the outer layer,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
  • Thanks to versatility in forming and the capacity to modify to specific needs,
  • Universal use in modern industrial fields – they serve a role in mass storage devices, electromotive mechanisms, diagnostic systems, as well as technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Lifting parameters

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

Breakaway force was determined for the most favorable conditions, taking into account:
  • using a sheet made of low-carbon steel, functioning as a circuit closing element
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • without any clearance between the magnet and steel
  • under vertical force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Holding efficiency impacted by specific conditions, such as (from most important):
  • Air gap (betwixt the magnet and the metal), because even a very small distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. High carbon content weaken the attraction effect.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Warnings
Shattering risk

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease working with magnets and use protective gear.

Implant safety

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Data carriers

Do not bring magnets near a wallet, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Magnetic interference

Navigation devices and mobile phones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Bodily injuries

Risk of injury: The pulling power is so immense that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Machining danger

Powder produced during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Power loss in heat

Control the heat. Exposing the magnet to high heat will ruin its properties and strength.

Respect the power

Handle magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and do not underestimate their force.

Keep away from children

Always keep magnets away from children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are very dangerous.

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?