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MPL 35x7x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020145

GTIN/EAN: 5906301811510

5.00

length

35 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

5.51 g

Magnetization Direction

↑ axial

Load capacity

6.21 kg / 60.89 N

Magnetic Induction

285.96 mT / 2860 Gs

Coating

[NiCuNi] Nickel

2.99 with VAT / pcs + price for transport

2.43 ZŁ net + 23% VAT / pcs

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Technical details - MPL 35x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 35x7x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020145
GTIN/EAN 5906301811510
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 35 mm [±0,1 mm]
Width 7 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 5.51 g
Magnetization Direction ↑ axial
Load capacity ~ ? 6.21 kg / 60.89 N
Magnetic Induction ~ ? 285.96 mT / 2860 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 35x7x3 / 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 analysis of the product - data

The following values are the result of a mathematical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MPL 35x7x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2858 Gs
285.8 mT
6.21 kg / 13.69 LBS
6210.0 g / 60.9 N
warning
1 mm 2328 Gs
232.8 mT
4.12 kg / 9.09 LBS
4121.1 g / 40.4 N
warning
2 mm 1801 Gs
180.1 mT
2.47 kg / 5.44 LBS
2467.6 g / 24.2 N
warning
3 mm 1376 Gs
137.6 mT
1.44 kg / 3.18 LBS
1440.7 g / 14.1 N
weak grip
5 mm 832 Gs
83.2 mT
0.53 kg / 1.16 LBS
526.9 g / 5.2 N
weak grip
10 mm 318 Gs
31.8 mT
0.08 kg / 0.17 LBS
77.1 g / 0.8 N
weak grip
15 mm 158 Gs
15.8 mT
0.02 kg / 0.04 LBS
18.9 g / 0.2 N
weak grip
20 mm 89 Gs
8.9 mT
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
weak grip
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 LBS
1.0 g / 0.0 N
weak grip
50 mm 10 Gs
1.0 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
weak grip

Table 2: Shear load (vertical surface)
MPL 35x7x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.24 kg / 2.74 LBS
1242.0 g / 12.2 N
1 mm Stal (~0.2) 0.82 kg / 1.82 LBS
824.0 g / 8.1 N
2 mm Stal (~0.2) 0.49 kg / 1.09 LBS
494.0 g / 4.8 N
3 mm Stal (~0.2) 0.29 kg / 0.63 LBS
288.0 g / 2.8 N
5 mm Stal (~0.2) 0.11 kg / 0.23 LBS
106.0 g / 1.0 N
10 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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: Vertical assembly (sliding) - vertical pull
MPL 35x7x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.86 kg / 4.11 LBS
1863.0 g / 18.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.24 kg / 2.74 LBS
1242.0 g / 12.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.62 kg / 1.37 LBS
621.0 g / 6.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.11 kg / 6.85 LBS
3105.0 g / 30.5 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 35x7x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.62 kg / 1.37 LBS
621.0 g / 6.1 N
1 mm
25%
1.55 kg / 3.42 LBS
1552.5 g / 15.2 N
2 mm
50%
3.11 kg / 6.85 LBS
3105.0 g / 30.5 N
3 mm
75%
4.66 kg / 10.27 LBS
4657.5 g / 45.7 N
5 mm
100%
6.21 kg / 13.69 LBS
6210.0 g / 60.9 N
10 mm
100%
6.21 kg / 13.69 LBS
6210.0 g / 60.9 N
11 mm
100%
6.21 kg / 13.69 LBS
6210.0 g / 60.9 N
12 mm
100%
6.21 kg / 13.69 LBS
6210.0 g / 60.9 N

Table 5: Thermal resistance (stability) - resistance threshold
MPL 35x7x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 6.21 kg / 13.69 LBS
6210.0 g / 60.9 N
OK
40 °C -2.2% 6.07 kg / 13.39 LBS
6073.4 g / 59.6 N
OK
60 °C -4.4% 5.94 kg / 13.09 LBS
5936.8 g / 58.2 N
80 °C -6.6% 5.80 kg / 12.79 LBS
5800.1 g / 56.9 N
100 °C -28.8% 4.42 kg / 9.75 LBS
4421.5 g / 43.4 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 35x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 12.34 kg / 27.19 LBS
4 231 Gs
1.85 kg / 4.08 LBS
1850 g / 18.2 N
N/A
1 mm 10.25 kg / 22.59 LBS
5 209 Gs
1.54 kg / 3.39 LBS
1537 g / 15.1 N
9.22 kg / 20.33 LBS
~0 Gs
2 mm 8.19 kg / 18.05 LBS
4 656 Gs
1.23 kg / 2.71 LBS
1228 g / 12.0 N
7.37 kg / 16.24 LBS
~0 Gs
3 mm 6.38 kg / 14.07 LBS
4 110 Gs
0.96 kg / 2.11 LBS
957 g / 9.4 N
5.74 kg / 12.66 LBS
~0 Gs
5 mm 3.74 kg / 8.25 LBS
3 149 Gs
0.56 kg / 1.24 LBS
562 g / 5.5 N
3.37 kg / 7.43 LBS
~0 Gs
10 mm 1.05 kg / 2.31 LBS
1 665 Gs
0.16 kg / 0.35 LBS
157 g / 1.5 N
0.94 kg / 2.08 LBS
~0 Gs
20 mm 0.15 kg / 0.34 LBS
637 Gs
0.02 kg / 0.05 LBS
23 g / 0.2 N
0.14 kg / 0.30 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
109 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
71 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
48 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
34 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
25 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
19 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MPL 35x7x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Impact energy (kinetic energy) - warning
MPL 35x7x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.12 km/h
(9.48 m/s)
0.25 J
30 mm 58.65 km/h
(16.29 m/s)
0.73 J
50 mm 75.71 km/h
(21.03 m/s)
1.22 J
100 mm 107.07 km/h
(29.74 m/s)
2.44 J

Table 9: Anti-corrosion coating durability
MPL 35x7x3 / 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 (Flux)
MPL 35x7x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 851 Mx 58.5 µWb
Pc Coefficient 0.25 Low (Flat)

Table 11: Submerged application
MPL 35x7x3 / N38

Environment Effective steel pull Effect
Air (land) 6.21 kg Standard
Water (riverbed) 7.11 kg
(+0.90 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Note: On a vertical wall, the magnet holds only ~20% of its max power.

2. Steel saturation

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

3. Power loss vs temp

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.25

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%
Sustainability
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: 020145-2026
Quick Unit Converter
Force (pull)

Magnetic Induction

See also offers

Component MPL 35x7x3 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 6.21 kg), this product is available off-the-shelf 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 strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 35x7x3 / 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.
They constitute a key element in the production of generators and material handling systems. Thanks to the flat surface and high force (approx. 6.21 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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 35x7x3 / N38 model is magnetized through the thickness (dimension 3 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: 35 mm (length), 7 mm (width), and 3 mm (thickness). It is a magnetic block with dimensions 35x7x3 mm and a self-weight of 5.51 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of neodymium magnets.

Strengths

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They do not lose strength, even after nearly ten years – the reduction in strength is only ~1% (based on measurements),
  • They maintain their magnetic properties even under strong external field,
  • A magnet with a metallic silver surface has better aesthetics,
  • Magnets possess impressive magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the potential of precise forming and adaptation to unique needs, NdFeB magnets can be created in a variety of geometric configurations, which increases their versatility,
  • Fundamental importance in future technologies – they are used in data components, motor assemblies, medical equipment, as well as industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend casing - magnetic holder, due to difficulties in producing threads inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The declared magnet strength represents the maximum value, measured under ideal test conditions, namely:
  • using a base made of high-permeability steel, functioning as a ideal flux conductor
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by lack of roughness
  • without any air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

Practical lifting capacity: influencing factors

Real force is influenced by specific conditions, such as (from most important):
  • Clearance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin sheet does not accept the full field, causing part of the power to be lost to the other side.
  • Plate material – low-carbon steel attracts best. Alloy admixtures lower magnetic permeability and lifting capacity.
  • Plate texture – ground elements ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings
Bone fractures

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Implant safety

Individuals with a pacemaker should keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.

Product not for children

Strictly keep magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Do not drill into magnets

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Keep away from computers

Data protection: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Handling rules

Use magnets with awareness. Their powerful strength can surprise even professionals. Plan your moves and respect their force.

Operating temperature

Watch the temperature. Heating the magnet to high heat will ruin its properties and strength.

Allergic reactions

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

Impact on smartphones

Note: neodymium magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, device, and navigation systems.

Beware of splinters

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

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