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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 - 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 - report

These information represent the result of a engineering analysis. Values are based on models for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - characteristics
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: Vertical capacity (wall)
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) - 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: 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 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: Two magnets (repulsion) - field range
MPL 35x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Hazards (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
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: Dynamics (cracking risk) - 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: Corrosion resistance
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 (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: Physics of underwater searching
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Plate thickness effect

*Thin steel (e.g. computer case) significantly reduces 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
Magnet Unit Converter
Magnet pull force

Magnetic Induction

Other products

This product is a very powerful 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. This rectangular block with a force of 60.89 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 35x7x3 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. 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. 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.
For mounting flat magnets MPL 35x7x3 / N38, we recommend utilizing strong epoxy glues (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 clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
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. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
  • Magnets very well protect themselves against demagnetization caused by ambient magnetic noise,
  • Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which increases force concentration,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of individual shaping and modifying to specific needs,
  • Huge importance in innovative solutions – they find application in magnetic memories, drive modules, diagnostic systems, and technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in realizing threads and complicated shapes in magnets, we propose using a housing - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Maximum magnetic pulling forcewhat contributes to it?

The specified lifting capacity represents the maximum value, recorded under laboratory conditions, specifically:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • with a thickness no less than 10 mm
  • with a surface cleaned and smooth
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction perpendicular to the mounting surface
  • in stable room temperature

Key elements affecting lifting force

It is worth knowing that the magnet holding may be lower subject to the following factors, starting with the most relevant:
  • Distance (between the magnet and the metal), as even a very small distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy steels lower magnetic permeability and lifting capacity.
  • Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was assessed by applying a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

H&S for magnets
Do not underestimate power

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Protect data

Avoid bringing magnets close to a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Pacemakers

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Phone sensors

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and GPS.

Dust explosion hazard

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Demagnetization risk

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

Magnets are brittle

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Keep away from children

Neodymium magnets are not toys. Swallowing several magnets can lead to them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

Sensitization to coating

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands or select encased magnets.

Serious injuries

Protect your hands. Two large magnets will snap together instantly with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Security! Want to know more? Check our post: Are neodymium magnets dangerous?