MPL 3x3x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020147
GTIN/EAN: 5906301811534
- 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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
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Need more?Frequently asked questions
How much will a block magnet really hold?
What is the maximum working temperature?
What safety factor should I allow?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Detailed specification - MPL 3x3x2 / N38 - lamellar magnet
Specification / characteristics - MPL 3x3x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020147 |
| GTIN/EAN | 5906301811534 |
| 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 | 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
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 simulation of the magnet - report
These information constitute the direct effect of a engineering calculation. Results rely on algorithms for the class Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap 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: Shear 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 (sliding) - 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 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 (substrate influence) - power losses
MPL 3x3x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
|
| 1 mm |
|
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
| 2 mm |
|
0.18 kg / 0.40 LBS
180.0 g / 1.8 N
|
| 3 mm |
|
0.27 kg / 0.60 LBS
270.0 g / 2.6 N
|
| 5 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 10 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 11 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 12 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
Table 5: Working in heat (material behavior) - power drop
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 (attraction) - field collision
MPL 3x3x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Safety (HSE) (electronics) - warnings
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 |
| 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: Collisions (cracking risk) - warning
MPL 3x3x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.94 km/h
(6.09 m/s)
|
0.00 J | |
| 30 mm |
21.94 km/h
(6.09 m/s)
|
0.00 J | |
| 50 mm |
21.93 km/h
(6.09 m/s)
|
0.00 J | |
| 100 mm |
21.94 km/h
(6.10 m/s)
|
0.00 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: Electrical 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: Hydrostatics and buoyancy
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% |
1. Shear force
*Warning: On a vertical surface, the magnet holds just ~20% of its nominal pull.
2. Steel thickness impact
*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) = 0.66
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.
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 |
See also proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They do not lose strength, even during around 10 years – the decrease in power is only ~1% (theoretically),
- Neodymium magnets remain extremely resistant to magnetic field loss caused by magnetic disturbances,
- A magnet with a smooth gold surface looks better,
- Magnetic induction on the working layer of the magnet turns out to be very high,
- Neodymium magnets are characterized by extremely 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 flexible molding and adaptation to specialized needs, neodymium magnets can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
- Fundamental importance in innovative solutions – they serve a role in magnetic memories, electric drive systems, advanced medical instruments, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions
Cons
- At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets decrease their force 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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Limited ability of creating threads in the magnet and complicated shapes - recommended is a housing - magnet mounting.
- Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
- Due to neodymium price, their price is higher than average,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what it depends on?
- using a sheet made of high-permeability steel, functioning as a magnetic yoke
- with a thickness minimum 10 mm
- with a plane cleaned and smooth
- under conditions of ideal adhesion (surface-to-surface)
- under perpendicular force vector (90-degree angle)
- at room temperature
Practical lifting capacity: influencing factors
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
- Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the load capacity.
H&S for magnets
Combustion hazard
Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Material brittleness
Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Life threat
For implant holders: Powerful magnets affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Electronic hazard
Very strong magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Hand protection
Pinching hazard: The pulling power is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Skin irritation risks
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, cease handling magnets and wear gloves.
Swallowing risk
Adult use only. Small elements pose a choking risk, causing severe trauma. Keep out of reach of children and animals.
Demagnetization risk
Avoid heat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Handling rules
Use magnets consciously. Their huge power can shock even professionals. Be vigilant and do not underestimate their power.
Keep away from electronics
Be aware: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.
