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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

bulk discounts:

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Detailed specification - 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

Technical analysis of the product - technical parameters

These data represent the direct effect of a mathematical simulation. Values are based on algorithms for the material Nd2Fe14B. Actual parameters may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull 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
medium risk
1 mm 2328 Gs
232.8 mT
4.12 kg / 9.09 lbs
4121.1 g / 40.4 N
medium risk
2 mm 1801 Gs
180.1 mT
2.47 kg / 5.44 lbs
2467.6 g / 24.2 N
medium risk
3 mm 1376 Gs
137.6 mT
1.44 kg / 3.18 lbs
1440.7 g / 14.1 N
safe
5 mm 832 Gs
83.2 mT
0.53 kg / 1.16 lbs
526.9 g / 5.2 N
safe
10 mm 318 Gs
31.8 mT
0.08 kg / 0.17 lbs
77.1 g / 0.8 N
safe
15 mm 158 Gs
15.8 mT
0.02 kg / 0.04 lbs
18.9 g / 0.2 N
safe
20 mm 89 Gs
8.9 mT
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
safe
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
safe
50 mm 10 Gs
1.0 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe

Table 2: Shear force (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: Wall mounting (shearing) - behavior on slippery surfaces
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: Material efficiency (substrate influence) - 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 stability (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 (attraction) - forces in the system
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: Protective zones (electronics) - precautionary measures
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
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Remote 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: Dynamics (kinetic energy) - collision effects
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: Coating parameters (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: Construction 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%
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

*Note: On a vertical surface, the magnet retains just a fraction of its nominal pull.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Power loss vs temp

*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) = 0.25

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 specification and ecology
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%
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
Measurement Calculator
Magnet pull force

Magnetic Induction

Check out also proposals

This product is an extremely strong magnet in the shape of a plate made of NdFeB material, which, with dimensions of 35x7x3 mm and a weight of 5.51 g, guarantees premium class connection. As a magnetic bar with high power (approx. 6.21 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. Watch your fingers! Magnets with a force of 6.21 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 generators and material handling systems. Thanks to the flat surface and high force (approx. 6.21 kg), they are ideal as closers 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. In practice, this means that this magnet has the greatest attraction force on its main planes (35x7 mm), which is ideal for flat mounting. 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). The key parameter here is the lifting capacity amounting to approximately 6.21 kg (force ~60.89 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their power is durable, and after approximately 10 years it decreases only by ~1% (according to research),
  • They show high resistance to demagnetization induced by external field influence,
  • Thanks to the shimmering finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the potential of flexible molding and customization to specialized projects, NdFeB magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
  • Significant place in future technologies – they find application in magnetic memories, electromotive mechanisms, medical equipment, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in small systems

Disadvantages

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing threads in the magnet and complex forms - preferred is cover - mounting mechanism.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what affects it?

The load parameter shown represents the maximum value, measured under ideal test conditions, namely:
  • using a sheet made of mild steel, acting as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • with a plane perfectly flat
  • under conditions of gap-free contact (metal-to-metal)
  • under axial force direction (90-degree angle)
  • at temperature room level

What influences lifting capacity in practice

During everyday use, the actual holding force depends on several key aspects, presented from crucial:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Pacemakers

Individuals with a pacemaker must keep an safe separation from magnets. The magnetism can interfere with the operation of the implant.

Beware of splinters

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Threat to electronics

Do not bring magnets near a purse, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Powerful field

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

Hand protection

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

Warning for allergy sufferers

Some people experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching can result in skin redness. We recommend use protective gloves.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

No play value

Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep out of reach of children and animals.

Compass and GPS

A powerful magnetic field interferes with the operation of compasses in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Heat sensitivity

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

Important! 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