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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

bulk discounts:

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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 analysis of the assembly - report

The following information are the result of a engineering simulation. Values rely on models for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Please consider these calculations as a reference point for designers.

Table 1: Static force (pull vs distance) - 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 pounds
360.0 g / 3.5 N
safe
1 mm 2223 Gs
222.3 mT
0.08 kg / 0.18 pounds
79.9 g / 0.8 N
safe
2 mm 966 Gs
96.6 mT
0.02 kg / 0.03 pounds
15.1 g / 0.1 N
safe
3 mm 468 Gs
46.8 mT
0.00 kg / 0.01 pounds
3.5 g / 0.0 N
safe
5 mm 153 Gs
15.3 mT
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
safe
10 mm 26 Gs
2.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
15 mm 9 Gs
0.9 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
20 mm 4 Gs
0.4 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Vertical hold (wall)
MPL 3x3x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.07 kg / 0.16 pounds
72.0 g / 0.7 N
1 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
2 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 pounds
108.0 g / 1.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.07 kg / 0.16 pounds
72.0 g / 0.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.08 pounds
36.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.18 kg / 0.40 pounds
180.0 g / 1.8 N

Table 4: Material efficiency (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 pounds
36.0 g / 0.4 N
1 mm
25%
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
2 mm
50%
0.18 kg / 0.40 pounds
180.0 g / 1.8 N
3 mm
75%
0.27 kg / 0.60 pounds
270.0 g / 2.6 N
5 mm
100%
0.36 kg / 0.79 pounds
360.0 g / 3.5 N
10 mm
100%
0.36 kg / 0.79 pounds
360.0 g / 3.5 N
11 mm
100%
0.36 kg / 0.79 pounds
360.0 g / 3.5 N
12 mm
100%
0.36 kg / 0.79 pounds
360.0 g / 3.5 N

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

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

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 3x3x2 / N38

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

Table 7: Protective zones (electronics) - 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: Dynamics (kinetic energy) - 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: Corrosion resistance
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: 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)

*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Thermal stability

*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) = 0.66

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
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%
Ecology and recycling (GPSR)
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 Induction

Other products

Component MPL 3x3x2 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 0.36 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 3x3x2 / 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. 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 fasteners under tiles, wood, or glass. Customers often choose this model for hanging tools 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 two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. 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. 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 neodymium magnets.

Advantages

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even after approximately 10 years – the reduction in power is only ~1% (theoretically),
  • Magnets very well protect themselves against demagnetization caused by ambient magnetic noise,
  • By covering with a shiny coating of silver, the element presents an professional look,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in designing and the ability to customize to specific needs,
  • Universal use in future technologies – they serve a role in data components, brushless drives, medical devices, as well as multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets lose their power 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of making threads in the magnet and complicated shapes - preferred is casing - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key 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 expensive raw materials, their price exceeds standard values,

Lifting parameters

Maximum lifting capacity of the magnetwhat it depends on?

Information about lifting capacity is the result of a measurement for optimal configuration, including:
  • on a block made of structural steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with an polished contact surface
  • without any clearance between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • at temperature room level

Determinants of lifting force in real conditions

Bear in mind that the application force may be lower influenced by elements below, in order of importance:
  • Gap (between the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Direction of force – maximum parameter is available only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Heat sensitivity

Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Electronic devices

Do not bring magnets near a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Warning for heart patients

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Compass and GPS

An intense magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid breaking the sensors.

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

This is not a toy

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates urgent medical intervention.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction happens, cease handling magnets and use protective gear.

Pinching danger

Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

Powerful field

Handle with care. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can move away.

Protective goggles

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

Security! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98