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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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Product card - 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 simulation of the product - report

These data are the outcome of a physical simulation. Results rely on algorithms for the material Nd2Fe14B. Operational performance might slightly differ. Treat these calculations as a preliminary roadmap for designers.

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
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
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: Slippage 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: Vertical assembly (shearing) - 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 (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 resistance (material behavior) - 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: Two magnets (repulsion) - forces in the system
MPL 35x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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) (implants) - 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: Collisions (cracking risk) - 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 (Pc)
MPL 35x7x3 / N38

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

Table 11: Underwater work (magnet fishing)
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

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

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically 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) = 0.25

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
Material specification
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
Pulling force

Magnetic Induction

Other offers

Component MPL 35x7x3 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This magnetic block with a force of 60.89 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures 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. 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 wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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.
This model is characterized by dimensions 35x7x3 mm, which, at a weight of 5.51 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 6.21 kg (force ~60.89 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • They do not lose power, even after approximately ten years – the drop in power is only ~1% (theoretically),
  • Neodymium magnets are extremely resistant to demagnetization caused by external field sources,
  • A magnet with a metallic gold surface is more attractive,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
  • Possibility of individual shaping as well as optimizing to individual needs,
  • Universal use in electronics industry – they are commonly used in magnetic memories, brushless drives, medical devices, and modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Detachment force of the magnet in optimal conditionswhat affects it?

The lifting capacity listed is a measurement result performed under specific, ideal conditions:
  • using a base made of low-carbon steel, acting as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • with a plane cleaned and smooth
  • without any insulating layer between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • in temp. approx. 20°C

Practical aspects of lifting capacity – factors

In practice, the actual holding force depends on a number of factors, listed from the most important:
  • Distance (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Steel grade – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Warnings
Health Danger

Patients with a heart stimulator should maintain an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Allergic reactions

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, cease handling magnets and wear gloves.

Maximum temperature

Do not overheat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Pinching danger

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Phone sensors

A powerful magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a smartphone to avoid damaging the sensors.

Protective goggles

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Safe distance

Data protection: Neodymium magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Powerful field

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

Do not drill into magnets

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

Do not give to children

Product intended for adults. Small elements pose a choking risk, causing severe trauma. Store away from kids and pets.

Warning! Details about risks in the article: Magnet Safety Guide.