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MPL 3x3x1 / N38 - lamellar magnet

lamellar magnet

Catalog no 020146

GTIN/EAN: 5906301811527

5.00

length

3 mm [±0,1 mm]

Width

3 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.07 g

Magnetization Direction

↑ axial

Load capacity

0.23 kg / 2.29 N

Magnetic Induction

317.31 mT / 3173 Gs

Coating

[NiCuNi] Nickel

0.1845 with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical data of the product - MPL 3x3x1 / N38 - lamellar magnet

Specification / characteristics - MPL 3x3x1 / N38 - lamellar magnet

properties
properties values
Cat. no. 020146
GTIN/EAN 5906301811527
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 1 mm [±0,1 mm]
Weight 0.07 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.23 kg / 2.29 N
Magnetic Induction ~ ? 317.31 mT / 3173 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 3x3x1 / 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 - data

The following data are the outcome of a engineering analysis. Values are based on models for the material Nd2Fe14B. Real-world conditions might slightly differ. Treat these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - interaction chart
MPL 3x3x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3168 Gs
316.8 mT
0.23 kg / 0.51 lbs
230.0 g / 2.3 N
low risk
1 mm 1565 Gs
156.5 mT
0.06 kg / 0.12 lbs
56.1 g / 0.6 N
low risk
2 mm 659 Gs
65.9 mT
0.01 kg / 0.02 lbs
9.9 g / 0.1 N
low risk
3 mm 307 Gs
30.7 mT
0.00 kg / 0.00 lbs
2.2 g / 0.0 N
low risk
5 mm 94 Gs
9.4 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
low risk
10 mm 15 Gs
1.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
15 mm 5 Gs
0.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
20 mm 2 Gs
0.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Shear load (wall)
MPL 3x3x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.05 kg / 0.10 lbs
46.0 g / 0.5 N
1 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 3x3x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.07 kg / 0.15 lbs
69.0 g / 0.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.05 kg / 0.10 lbs
46.0 g / 0.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.02 kg / 0.05 lbs
23.0 g / 0.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.12 kg / 0.25 lbs
115.0 g / 1.1 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 3x3x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.02 kg / 0.05 lbs
23.0 g / 0.2 N
1 mm
25%
0.06 kg / 0.13 lbs
57.5 g / 0.6 N
2 mm
50%
0.12 kg / 0.25 lbs
115.0 g / 1.1 N
3 mm
75%
0.17 kg / 0.38 lbs
172.5 g / 1.7 N
5 mm
100%
0.23 kg / 0.51 lbs
230.0 g / 2.3 N
10 mm
100%
0.23 kg / 0.51 lbs
230.0 g / 2.3 N
11 mm
100%
0.23 kg / 0.51 lbs
230.0 g / 2.3 N
12 mm
100%
0.23 kg / 0.51 lbs
230.0 g / 2.3 N

Table 5: Thermal stability (stability) - thermal limit
MPL 3x3x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.23 kg / 0.51 lbs
230.0 g / 2.3 N
OK
40 °C -2.2% 0.22 kg / 0.50 lbs
224.9 g / 2.2 N
OK
60 °C -4.4% 0.22 kg / 0.48 lbs
219.9 g / 2.2 N
80 °C -6.6% 0.21 kg / 0.47 lbs
214.8 g / 2.1 N
100 °C -28.8% 0.16 kg / 0.36 lbs
163.8 g / 1.6 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 3x3x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.56 kg / 1.23 lbs
4 719 Gs
0.08 kg / 0.18 lbs
84 g / 0.8 N
N/A
1 mm 0.31 kg / 0.68 lbs
4 706 Gs
0.05 kg / 0.10 lbs
46 g / 0.5 N
0.28 kg / 0.61 lbs
~0 Gs
2 mm 0.14 kg / 0.30 lbs
3 129 Gs
0.02 kg / 0.04 lbs
20 g / 0.2 N
0.12 kg / 0.27 lbs
~0 Gs
3 mm 0.06 kg / 0.12 lbs
2 019 Gs
0.01 kg / 0.02 lbs
8 g / 0.1 N
0.05 kg / 0.11 lbs
~0 Gs
5 mm 0.01 kg / 0.02 lbs
885 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
10 mm 0.00 kg / 0.00 lbs
188 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
30 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
2 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
1 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
1 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
0 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
0 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 3x3x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 1.5 cm
Hearing aid 10 Gs (1.0 mT) 1.5 cm
Timepiece 20 Gs (2.0 mT) 1.0 cm
Phone / Smartphone 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) - warning
MPL 3x3x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 57.81 km/h
(16.06 m/s)
0.01 J
30 mm 100.13 km/h
(27.81 m/s)
0.03 J
50 mm 129.27 km/h
(35.91 m/s)
0.05 J
100 mm 182.81 km/h
(50.78 m/s)
0.09 J

Table 9: Corrosion resistance
MPL 3x3x1 / 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 (Flux)
MPL 3x3x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 306 Mx 3.1 µWb
Pc Coefficient 0.40 Low (Flat)

Table 11: Physics of underwater searching
MPL 3x3x1 / N38

Environment Effective steel pull Effect
Air (land) 0.23 kg Standard
Water (riverbed) 0.26 kg
(+0.03 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) severely 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) = 0.40

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
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: 020146-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other offers

Component MPL 3x3x1 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 2.29 N is ready for shipment in 24h, allowing for rapid realization of your project. 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 3x3x1 / 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 generators and material handling systems. Thanks to the flat surface and high force (approx. 0.23 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 3x3x1 / N38, we recommend utilizing two-component adhesives (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. 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 (3x3 mm), which is ideal for flat mounting. 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: 3 mm (length), 3 mm (width), and 1 mm (thickness). The key parameter here is the holding force amounting to approximately 0.23 kg (force ~2.29 N), which, with such a compact shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • Their magnetic field is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
  • They maintain their magnetic properties even under strong external field,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets are distinguished by maximum magnetic induction on the active area,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Considering the potential of precise molding and adaptation to specialized projects, magnetic components can be created in a broad palette of shapes and sizes, which amplifies use scope,
  • Universal use in advanced technology sectors – they are commonly used in data components, motor assemblies, diagnostic systems, also industrial machines.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Cons

Characteristics of disadvantages of neodymium magnets and ways of using them
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, taking into account:
  • on a block made of mild steel, perfectly concentrating the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by even structure
  • with zero gap (no impurities)
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

Key elements affecting lifting force

Please note that the working load may be lower influenced by the following factors, in order of importance:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – too thin steel does not close the flux, causing part of the power to be escaped into the air.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy steels lower magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces weaken the grip.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.

Safe handling of neodymium magnets
Material brittleness

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets will cause them shattering into shards.

Physical harm

Watch your fingers. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Keep away from electronics

Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Protect data

Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Flammability

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Conscious usage

Be careful. Rare earth magnets attract from a long distance and snap with massive power, often faster than you can react.

Keep away from children

Absolutely store magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are tragic.

Medical implants

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

Nickel coating and allergies

A percentage of the population suffer from a sensitization to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in an allergic reaction. We recommend use protective gloves.

Demagnetization risk

Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.

Security! More info about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98