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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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Physical properties - 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

Engineering analysis of the assembly - technical parameters

These data constitute the result of a engineering simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these calculations as a reference point for designers.

Table 1: Static pull force (pull vs gap) - power drop
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
low risk
5 mm 832 Gs
83.2 mT
0.53 kg / 1.16 lbs
526.9 g / 5.2 N
low risk
10 mm 318 Gs
31.8 mT
0.08 kg / 0.17 lbs
77.1 g / 0.8 N
low risk
15 mm 158 Gs
15.8 mT
0.02 kg / 0.04 lbs
18.9 g / 0.2 N
low risk
20 mm 89 Gs
8.9 mT
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
low risk
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
low risk
50 mm 10 Gs
1.0 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk

Table 2: Sliding capacity (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 (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) - power losses
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 (material behavior) - power drop
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: Two magnets (repulsion) - field range
MPL 35x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 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: Dynamics (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: Surface protection spec
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: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains only a fraction of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*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) = 0.25

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 and environmental data
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%
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: 020145-2026
Measurement Calculator
Magnet pull force

Magnetic Induction

Other offers

Component MPL 35x7x3 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 60.89 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating strong flat 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. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of wind generators and material handling systems. They work great as invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 35x7x3 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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). 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 power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of Nd2Fe14B magnets.

Advantages

Besides their immense strength, neodymium magnets offer the following advantages:
  • They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
  • Magnets effectively defend themselves against loss of magnetization caused by external fields,
  • Thanks to the shiny finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an aesthetic appearance,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Considering the potential of accurate forming and customization to custom needs, neodymium magnets can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
  • Versatile presence in modern technologies – they find application in HDD drives, electric drive systems, advanced medical instruments, also industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited possibility of making nuts in the magnet and complex forms - recommended is cover - magnetic holder.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Furthermore, small elements of these products can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat affects it?

The force parameter is a result of laboratory testing executed under specific, ideal conditions:
  • with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with a surface cleaned and smooth
  • with direct contact (no impurities)
  • during pulling in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Bear in mind that the application force may be lower influenced by elements below, in order of importance:
  • Distance – existence of foreign body (rust, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Chemical composition of the base – mild steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.

H&S for magnets
No play value

NdFeB magnets are not intended for children. Swallowing several magnets may result in them attracting across intestines, which poses a severe health hazard and necessitates immediate surgery.

Implant safety

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

Allergic reactions

A percentage of the population suffer from a sensitization to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause dermatitis. It is best to wear safety gloves.

Respect the power

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

Crushing force

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!

GPS Danger

Note: rare earth magnets generate a field that confuses sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

Do not drill into magnets

Combustion risk: Neodymium dust is explosive. Avoid machining magnets in home conditions as this risks ignition.

Beware of splinters

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Protect data

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).

Demagnetization risk

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

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