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MPL 3x3x2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020147

GTIN/EAN: 5906301811534

5.00

length

3 mm [±0,1 mm]

Width

3 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

0.13 g

Magnetization Direction

↑ axial

Load capacity

0.36 kg / 3.49 N

Magnetic Induction

472.94 mT / 4729 Gs

Coating

[NiCuNi] Nickel

0.1722 with VAT / pcs + price for transport

0.1400 ZŁ net + 23% VAT / pcs

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Technical of the product - MPL 3x3x2 / N38 - lamellar magnet

Specification / characteristics - MPL 3x3x2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020147
GTIN/EAN 5906301811534
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 3 mm [±0,1 mm]
Width 3 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 0.13 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.36 kg / 3.49 N
Magnetic Induction ~ ? 472.94 mT / 4729 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 3x3x2 / 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 modeling of the assembly - data

These information are the direct effect of a engineering analysis. Values are based on algorithms for the material Nd2Fe14B. Real-world performance may differ. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MPL 3x3x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4719 Gs
471.9 mT
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
weak grip
1 mm 2223 Gs
222.3 mT
0.08 kg / 0.18 LBS
79.9 g / 0.8 N
weak grip
2 mm 966 Gs
96.6 mT
0.02 kg / 0.03 LBS
15.1 g / 0.1 N
weak grip
3 mm 468 Gs
46.8 mT
0.00 kg / 0.01 LBS
3.5 g / 0.0 N
weak grip
5 mm 153 Gs
15.3 mT
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
weak grip
10 mm 26 Gs
2.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
15 mm 9 Gs
0.9 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
20 mm 4 Gs
0.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Slippage load (wall)
MPL 3x3x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.07 kg / 0.16 LBS
72.0 g / 0.7 N
1 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
2 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 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) - vertical pull
MPL 3x3x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.11 kg / 0.24 LBS
108.0 g / 1.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.07 kg / 0.16 LBS
72.0 g / 0.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.18 kg / 0.40 LBS
180.0 g / 1.8 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 3x3x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
1 mm
25%
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
2 mm
50%
0.18 kg / 0.40 LBS
180.0 g / 1.8 N
3 mm
75%
0.27 kg / 0.60 LBS
270.0 g / 2.6 N
5 mm
100%
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
10 mm
100%
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
11 mm
100%
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
12 mm
100%
0.36 kg / 0.79 LBS
360.0 g / 3.5 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 3x3x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.36 kg / 0.79 LBS
360.0 g / 3.5 N
OK
40 °C -2.2% 0.35 kg / 0.78 LBS
352.1 g / 3.5 N
OK
60 °C -4.4% 0.34 kg / 0.76 LBS
344.2 g / 3.4 N
OK
80 °C -6.6% 0.34 kg / 0.74 LBS
336.2 g / 3.3 N
100 °C -28.8% 0.26 kg / 0.57 LBS
256.3 g / 2.5 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 3x3x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.24 kg / 2.72 LBS
5 677 Gs
0.19 kg / 0.41 LBS
185 g / 1.8 N
N/A
1 mm 0.63 kg / 1.38 LBS
6 725 Gs
0.09 kg / 0.21 LBS
94 g / 0.9 N
0.56 kg / 1.24 LBS
~0 Gs
2 mm 0.27 kg / 0.60 LBS
4 447 Gs
0.04 kg / 0.09 LBS
41 g / 0.4 N
0.25 kg / 0.54 LBS
~0 Gs
3 mm 0.12 kg / 0.26 LBS
2 903 Gs
0.02 kg / 0.04 LBS
18 g / 0.2 N
0.11 kg / 0.23 LBS
~0 Gs
5 mm 0.02 kg / 0.05 LBS
1 324 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
0.02 kg / 0.05 LBS
~0 Gs
10 mm 0.00 kg / 0.00 LBS
306 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
52 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
4 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
2 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
2 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
1 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
1 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
1 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MPL 3x3x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.0 cm
Hearing aid 10 Gs (1.0 mT) 1.5 cm
Timepiece 20 Gs (2.0 mT) 1.5 cm
Mobile device 40 Gs (4.0 mT) 1.0 cm
Car key 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Collisions (cracking risk) - collision effects
MPL 3x3x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 53.07 km/h
(14.74 m/s)
0.01 J
30 mm 91.92 km/h
(25.53 m/s)
0.04 J
50 mm 118.67 km/h
(32.96 m/s)
0.07 J
100 mm 167.83 km/h
(46.62 m/s)
0.14 J

Table 9: Surface protection spec
MPL 3x3x2 / 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 3x3x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 429 Mx 4.3 µWb
Pc Coefficient 0.66 High (Stable)

Table 11: Submerged application
MPL 3x3x2 / N38

Environment Effective steel pull Effect
Air (land) 0.36 kg Standard
Water (riverbed) 0.41 kg
(+0.05 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. Wall mount (shear)

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

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) drastically limits 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) = 0.66

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
Elemental analysis
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: 020147-2026
Measurement Calculator
Force (pull)

Magnetic Field

Check out more products

This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 3x3x2 mm and a weight of 0.13 g, guarantees premium class connection. As a block magnet with high power (approx. 0.36 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is sliding 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. Watch your fingers! Magnets with a force of 0.36 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.
Plate magnets MPL 3x3x2 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 0.36 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 3x3x2 / N38, it is best to use 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.
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 (3x3 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 3x3x2 mm, which, at a weight of 0.13 g, makes it an element with high energy density. It is a magnetic block with dimensions 3x3x2 mm and a self-weight of 0.13 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.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They have constant strength, and over nearly ten years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets are characterized by extremely resistant to loss of magnetic properties caused by external field sources,
  • Thanks to the reflective finish, the surface of nickel, gold, or silver-plated gives an clean appearance,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to flexibility in shaping and the ability to customize to unusual requirements,
  • Huge importance in high-tech industry – they are commonly used in hard drives, electric motors, medical equipment, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can disrupt the diagnostic process medical after entering the body.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

Maximum lifting capacity of the magnetwhat it depends on?

The load parameter shown concerns the limit force, measured under ideal test conditions, specifically:
  • on a plate made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with an ideally smooth touching surface
  • with zero gap (no coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

In real-world applications, the actual holding force is determined by a number of factors, presented from the most important:
  • Distance (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with NdFeB magnets
Operating temperature

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Implant safety

For implant holders: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Keep away from electronics

A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Keep magnets close to a device to avoid breaking the sensors.

Magnets are brittle

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Electronic hazard

Powerful magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

No play value

These products are not suitable for play. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a potent allergen. For allergy sufferers, refrain from direct skin contact or opt for encased magnets.

Caution required

Handle magnets consciously. Their immense force can shock even professionals. Be vigilant and respect their power.

Combustion hazard

Powder produced during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Hand protection

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?