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MPL 17x17x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020124

GTIN/EAN: 5906301811305

5.00

length

17 mm [±0,1 mm]

Width

17 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.5 g

Magnetization Direction

↑ axial

Load capacity

3.22 kg / 31.54 N

Magnetic Induction

187.48 mT / 1875 Gs

Coating

[NiCuNi] Nickel

4.71 with VAT / pcs + price for transport

3.83 ZŁ net + 23% VAT / pcs

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Weight as well as appearance of a neodymium magnet can be estimated with our magnetic calculator.

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Detailed specification - MPL 17x17x3 / N38 - lamellar magnet

Specification / characteristics - MPL 17x17x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020124
GTIN/EAN 5906301811305
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 17 mm [±0,1 mm]
Width 17 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 6.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.22 kg / 31.54 N
Magnetic Induction ~ ? 187.48 mT / 1875 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 17x17x3 / 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 magnet - report

The following values represent the outcome of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ. Treat these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs distance) - power drop
MPL 17x17x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1874 Gs
187.4 mT
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
warning
1 mm 1761 Gs
176.1 mT
2.84 kg / 6.27 lbs
2842.9 g / 27.9 N
warning
2 mm 1610 Gs
161.0 mT
2.38 kg / 5.24 lbs
2376.8 g / 23.3 N
warning
3 mm 1440 Gs
144.0 mT
1.90 kg / 4.19 lbs
1901.0 g / 18.6 N
weak grip
5 mm 1099 Gs
109.9 mT
1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
weak grip
10 mm 508 Gs
50.8 mT
0.24 kg / 0.52 lbs
236.4 g / 2.3 N
weak grip
15 mm 245 Gs
24.5 mT
0.06 kg / 0.12 lbs
55.2 g / 0.5 N
weak grip
20 mm 131 Gs
13.1 mT
0.02 kg / 0.03 lbs
15.7 g / 0.2 N
weak grip
30 mm 48 Gs
4.8 mT
0.00 kg / 0.00 lbs
2.1 g / 0.0 N
weak grip
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip

Table 2: Vertical force (vertical surface)
MPL 17x17x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.64 kg / 1.42 lbs
644.0 g / 6.3 N
1 mm Stal (~0.2) 0.57 kg / 1.25 lbs
568.0 g / 5.6 N
2 mm Stal (~0.2) 0.48 kg / 1.05 lbs
476.0 g / 4.7 N
3 mm Stal (~0.2) 0.38 kg / 0.84 lbs
380.0 g / 3.7 N
5 mm Stal (~0.2) 0.22 kg / 0.49 lbs
222.0 g / 2.2 N
10 mm Stal (~0.2) 0.05 kg / 0.11 lbs
48.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 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 17x17x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.64 kg / 1.42 lbs
644.0 g / 6.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 17x17x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
1 mm
25%
0.81 kg / 1.77 lbs
805.0 g / 7.9 N
2 mm
50%
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N
3 mm
75%
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
5 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
10 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
11 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
12 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N

Table 5: Thermal stability (stability) - thermal limit
MPL 17x17x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
OK
40 °C -2.2% 3.15 kg / 6.94 lbs
3149.2 g / 30.9 N
OK
60 °C -4.4% 3.08 kg / 6.79 lbs
3078.3 g / 30.2 N
80 °C -6.6% 3.01 kg / 6.63 lbs
3007.5 g / 29.5 N
100 °C -28.8% 2.29 kg / 5.05 lbs
2292.6 g / 22.5 N

Table 6: Two magnets (attraction) - forces in the system
MPL 17x17x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 6.26 kg / 13.80 lbs
3 313 Gs
0.94 kg / 2.07 lbs
939 g / 9.2 N
N/A
1 mm 5.93 kg / 13.07 lbs
3 648 Gs
0.89 kg / 1.96 lbs
889 g / 8.7 N
5.33 kg / 11.76 lbs
~0 Gs
2 mm 5.53 kg / 12.19 lbs
3 523 Gs
0.83 kg / 1.83 lbs
829 g / 8.1 N
4.97 kg / 10.97 lbs
~0 Gs
3 mm 5.08 kg / 11.21 lbs
3 379 Gs
0.76 kg / 1.68 lbs
763 g / 7.5 N
4.58 kg / 10.09 lbs
~0 Gs
5 mm 4.15 kg / 9.16 lbs
3 053 Gs
0.62 kg / 1.37 lbs
623 g / 6.1 N
3.74 kg / 8.24 lbs
~0 Gs
10 mm 2.15 kg / 4.75 lbs
2 199 Gs
0.32 kg / 0.71 lbs
323 g / 3.2 N
1.94 kg / 4.27 lbs
~0 Gs
20 mm 0.46 kg / 1.01 lbs
1 016 Gs
0.07 kg / 0.15 lbs
69 g / 0.7 N
0.41 kg / 0.91 lbs
~0 Gs
50 mm 0.01 kg / 0.02 lbs
153 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
96 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
64 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
44 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
32 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
24 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 17x17x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Timepiece 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - collision effects
MPL 17x17x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.45 km/h
(6.52 m/s)
0.14 J
30 mm 38.89 km/h
(10.80 m/s)
0.38 J
50 mm 50.19 km/h
(13.94 m/s)
0.63 J
100 mm 70.98 km/h
(19.72 m/s)
1.26 J

Table 9: Corrosion resistance
MPL 17x17x3 / 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 17x17x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 509 Mx 65.1 µWb
Pc Coefficient 0.23 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 17x17x3 / N38

Environment Effective steel pull Effect
Air (land) 3.22 kg Standard
Water (riverbed) 3.69 kg
(+0.47 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. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.23

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
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%
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: 020124-2026
Quick Unit Converter
Pulling force

Magnetic Induction

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 17x17x3 mm and a weight of 6.5 g, guarantees the highest quality connection. As a block magnet with high power (approx. 3.22 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.
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 17x17x3 / 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. 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 invisible mounts 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. 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).
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.
This model is characterized by dimensions 17x17x3 mm, which, at a weight of 6.5 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 3.22 kg (force ~31.54 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • Their power is maintained, and after approximately ten years it decreases only by ~1% (according to research),
  • They maintain their magnetic properties even under external field action,
  • Thanks to the smooth finish, the surface of nickel, gold-plated, or silver gives an clean appearance,
  • Neodymium magnets generate maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • 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...
  • Thanks to modularity in forming and the ability to customize to individual projects,
  • Huge importance in innovative solutions – they are utilized in magnetic memories, electromotive mechanisms, advanced medical instruments, as well as other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose 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 stability even at temperatures up to 230°C
  • They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complex forms in magnets, we propose using casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these products can complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, including:
  • using a plate made of high-permeability steel, acting as a magnetic yoke
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature room level

Magnet lifting force in use – key factors

Bear in mind that the magnet holding may be lower depending on the following factors, starting with the most relevant:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be lost into the air.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures lower magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the holding force.

Precautions when working with neodymium magnets
Danger to pacemakers

For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Conscious usage

Handle with care. Rare earth magnets attract from a long distance and connect with massive power, often faster than you can move away.

Magnets are brittle

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them breaking into small pieces.

GPS and phone interference

GPS units and smartphones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can ruin the sensors in your phone.

Adults only

Strictly keep magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are tragic.

Data carriers

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).

Crushing risk

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

Do not overheat magnets

Do not overheat. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Nickel allergy

Some people experience a sensitization to Ni, which is the common plating for neodymium magnets. Frequent touching can result in a rash. It is best to use safety gloves.

Dust explosion hazard

Dust created during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Security! Learn more about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98