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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Technical specification of the product - 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 simulation of the magnet - technical parameters
The following values represent the outcome of a mathematical analysis. Values rely on models for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Use these data as a supplementary guide when designing systems.
Table 1: Static force (pull vs distance) - characteristics
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
|
low risk |
| 1 mm |
2530 Gs
253.0 mT
|
0.08 kg / 75.4 g
0.7 N
|
low risk |
| 2 mm |
1127 Gs
112.7 mT
|
0.01 kg / 15.0 g
0.1 N
|
low risk |
| 3 mm |
562 Gs
56.2 mT
|
0.00 kg / 3.7 g
0.0 N
|
low risk |
| 5 mm |
192 Gs
19.2 mT
|
0.00 kg / 0.4 g
0.0 N
|
low risk |
| 10 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 15 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 20 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.0 g
0.0 N
|
low risk |
Table 2: Vertical 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) - vertical pull
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: Material efficiency (saturation) - 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 resistance (material behavior) - thermal limit
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: Two magnets (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: Safety (HSE) (implants) - warnings
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 |
| Timepiece | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 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: Collisions (cracking risk) - collision effects
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: Surface protection spec
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: Construction 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: Submerged application
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)
*Note: On a vertical surface, the magnet retains only a fraction of its max power.
2. Plate thickness effect
*Thin steel (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*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) = 0.84
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.
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 |
Check out also proposals
Pros and cons of rare earth magnets.
Advantages
- They do not lose magnetism, even over approximately ten years – the decrease in power is only ~1% (based on measurements),
- They are noted for resistance to demagnetization induced by external field influence,
- In other words, due to the smooth layer of nickel, the element looks attractive,
- Neodymium magnets ensure maximum magnetic induction on a their surface, which increases force concentration,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Thanks to freedom in shaping and the capacity to adapt to specific needs,
- Key role in future technologies – they serve a role in computer drives, brushless drives, medical equipment, and other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Limitations
- At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. 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 corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We suggest a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated forms.
- Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
- With budget limitations the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum magnetic pulling force – what contributes to it?
- on a block made of structural steel, optimally conducting the magnetic flux
- with a cross-section no less than 10 mm
- with a plane free of scratches
- without any clearance between the magnet and steel
- during pulling in a direction vertical to the plane
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Gap between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material type – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
- Surface condition – ground elements ensure maximum contact, which increases force. Rough surfaces weaken the grip.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the holding force.
Warnings
Fire risk
Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Beware of splinters
Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
Cards and drives
Intense magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.
Maximum temperature
Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Pinching danger
Big blocks can crush fingers in a fraction of a second. Never put your hand betwixt two strong magnets.
Swallowing risk
Adult use only. Tiny parts can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.
Nickel allergy
Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid touching magnets with bare hands and select encased magnets.
Precision electronics
A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Maintain magnets close to a device to avoid damaging the sensors.
Medical interference
People with a pacemaker should keep an safe separation from magnets. The magnetic field can interfere with the functioning of the life-saving device.
Handling rules
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.
