MPL 3x3x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020148
GTIN/EAN: 5906301811541
length
3 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
0.2 g
Magnetization Direction
↑ axial
Load capacity
0.34 kg / 3.37 N
Magnetic Induction
538.48 mT / 5385 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MPL 3x3x3 / N38 - lamellar magnet
Specification / characteristics - MPL 3x3x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020148 |
| GTIN/EAN | 5906301811541 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 3 mm [±0,1 mm] |
| Width | 3 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 0.2 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.34 kg / 3.37 N |
| Magnetic Induction ~ ? | 538.48 mT / 5385 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| 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
| 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 |
Engineering analysis of the product - technical parameters
Presented information represent the result of a mathematical simulation. Results rely on models for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.
Table 1: Static pull force (pull vs gap) - interaction chart
MPL 3x3x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg) | Risk Status |
|---|---|---|---|
| 0 mm |
5372 Gs
537.2 mT
|
0.34 kg / 340.0 g
3.3 N
|
weak grip |
| 1 mm |
2530 Gs
253.0 mT
|
0.08 kg / 75.4 g
0.7 N
|
weak grip |
| 2 mm |
1127 Gs
112.7 mT
|
0.01 kg / 15.0 g
0.1 N
|
weak grip |
| 3 mm |
562 Gs
56.2 mT
|
0.00 kg / 3.7 g
0.0 N
|
weak grip |
| 5 mm |
192 Gs
19.2 mT
|
0.00 kg / 0.4 g
0.0 N
|
weak grip |
| 10 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.0 g
0.0 N
|
weak grip |
| 15 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
weak grip |
| 20 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.0 g
0.0 N
|
weak grip |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
weak grip |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.0 g
0.0 N
|
weak grip |
Table 2: Slippage capacity (wall)
MPL 3x3x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.07 kg / 68.0 g
0.7 N
|
| 1 mm | Stal (~0.2) |
0.02 kg / 16.0 g
0.2 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 2.0 g
0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 3x3x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.10 kg / 102.0 g
1.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.07 kg / 68.0 g
0.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.03 kg / 34.0 g
0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.17 kg / 170.0 g
1.7 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 3x3x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 34.0 g
0.3 N
|
| 1 mm |
|
0.09 kg / 85.0 g
0.8 N
|
| 2 mm |
|
0.17 kg / 170.0 g
1.7 N
|
| 5 mm |
|
0.34 kg / 340.0 g
3.3 N
|
| 10 mm |
|
0.34 kg / 340.0 g
3.3 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 3x3x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.34 kg / 340.0 g
3.3 N
|
OK |
| 40 °C | -2.2% |
0.33 kg / 332.5 g
3.3 N
|
OK |
| 60 °C | -4.4% |
0.33 kg / 325.0 g
3.2 N
|
OK |
| 80 °C | -6.6% |
0.32 kg / 317.6 g
3.1 N
|
|
| 100 °C | -28.8% |
0.24 kg / 242.1 g
2.4 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 3x3x3 / N38
| Gap (mm) | Attraction (kg) (N-S) | Repulsion (kg) (N-N) |
|---|---|---|
| 0 mm |
1.60 kg / 1601 g
15.7 N
5 931 Gs
|
N/A |
| 1 mm |
0.80 kg / 803 g
7.9 N
7 610 Gs
|
0.72 kg / 723 g
7.1 N
~0 Gs
|
| 2 mm |
0.36 kg / 355 g
3.5 N
5 061 Gs
|
0.32 kg / 320 g
3.1 N
~0 Gs
|
| 3 mm |
0.15 kg / 155 g
1.5 N
3 343 Gs
|
0.14 kg / 139 g
1.4 N
~0 Gs
|
| 5 mm |
0.03 kg / 34 g
0.3 N
1 568 Gs
|
0.03 kg / 31 g
0.3 N
~0 Gs
|
| 10 mm |
0.00 kg / 2 g
0.0 N
384 Gs
|
0.00 kg / 0 g
0.0 N
~0 Gs
|
| 20 mm |
0.00 kg / 0 g
0.0 N
70 Gs
|
0.00 kg / 0 g
0.0 N
~0 Gs
|
| 50 mm |
0.00 kg / 0 g
0.0 N
6 Gs
|
0.00 kg / 0 g
0.0 N
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 3x3x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.0 cm |
| Remote | 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 (cracking risk) - warning
MPL 3x3x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
41.58 km/h
(11.55 m/s)
|
0.01 J | |
| 30 mm |
72.02 km/h
(20.01 m/s)
|
0.04 J | |
| 50 mm |
92.98 km/h
(25.83 m/s)
|
0.07 J | |
| 100 mm |
131.49 km/h
(36.53 m/s)
|
0.13 J |
Table 9: Corrosion resistance
MPL 3x3x3 / 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 3x3x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 495 Mx | 5.0 µWb |
| Pc Coefficient | 0.84 | High (Stable) |
Table 11: Physics of underwater searching
MPL 3x3x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.34 kg | Standard |
| Water (riverbed) |
0.39 kg
(+0.05 kg Buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds only ~20% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Power loss vs temp
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.84
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of Nd2Fe14B magnets.
Pros
- They retain magnetic properties for almost 10 years – the loss is just ~1% (in theory),
- Neodymium magnets are distinguished by highly resistant to demagnetization caused by external magnetic fields,
- Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an elegant appearance,
- The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
- Thanks to versatility in shaping and the ability to modify to client solutions,
- Versatile presence in future technologies – they find application in magnetic memories, motor assemblies, precision medical tools, also technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Cons
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these devices can be problematic in diagnostics medical after entering the body.
- Due to expensive raw materials, their price exceeds standard values,
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what it depends on?
- using a base made of mild steel, functioning as a circuit closing element
- whose transverse dimension is min. 10 mm
- with an ideally smooth touching surface
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction perpendicular to the mounting surface
- at room temperature
Magnet lifting force in use – key factors
- Gap (betwixt the magnet and the plate), because even a very small distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.
Warnings
Keep away from children
NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates immediate surgery.
Warning for allergy sufferers
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop handling magnets and use protective gear.
GPS Danger
An intense magnetic field disrupts the operation of magnetometers in smartphones and navigation systems. Keep magnets near a smartphone to avoid damaging the sensors.
Magnetic media
Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.
Dust is flammable
Powder created during machining of magnets is combustible. Do not drill into magnets unless you are an expert.
Fragile material
NdFeB magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them shattering into small pieces.
Heat sensitivity
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.
Crushing force
Big blocks can crush fingers instantly. Never place your hand between two attracting surfaces.
Health Danger
People with a ICD should maintain an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.
Powerful field
Be careful. Rare earth magnets act from a distance and connect with massive power, often faster than you can react.
