MPL 20x10x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020128
GTIN/EAN: 5906301811343
length
20 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
7.5 g
Magnetization Direction
↑ axial
Load capacity
6.15 kg / 60.31 N
Magnetic Induction
349.47 mT / 3495 Gs
Coating
[NiCuNi] Nickel
4.54 ZŁ with VAT / pcs + price for transport
3.69 ZŁ net + 23% VAT / pcs
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Physical properties - MPL 20x10x5 / N38 - lamellar magnet
Specification / characteristics - MPL 20x10x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020128 |
| GTIN/EAN | 5906301811343 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 20 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 7.5 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 6.15 kg / 60.31 N |
| Magnetic Induction ~ ? | 349.47 mT / 3495 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 |
Technical analysis of the assembly - report
The following data represent the direct effect of a mathematical simulation. Results are based on algorithms for the material Nd2Fe14B. Actual performance may differ from theoretical values. Use these data as a supplementary guide when designing systems.
Table 1: Static force (pull vs gap) - interaction chart
MPL 20x10x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3493 Gs
349.3 mT
|
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
warning |
| 1 mm |
3035 Gs
303.5 mT
|
4.64 kg / 10.23 lbs
4641.8 g / 45.5 N
|
warning |
| 2 mm |
2558 Gs
255.8 mT
|
3.30 kg / 7.27 lbs
3298.0 g / 32.4 N
|
warning |
| 3 mm |
2120 Gs
212.0 mT
|
2.26 kg / 4.99 lbs
2264.8 g / 22.2 N
|
warning |
| 5 mm |
1433 Gs
143.3 mT
|
1.03 kg / 2.28 lbs
1034.5 g / 10.1 N
|
low risk |
| 10 mm |
574 Gs
57.4 mT
|
0.17 kg / 0.37 lbs
166.1 g / 1.6 N
|
low risk |
| 15 mm |
267 Gs
26.7 mT
|
0.04 kg / 0.08 lbs
35.9 g / 0.4 N
|
low risk |
| 20 mm |
141 Gs
14.1 mT
|
0.01 kg / 0.02 lbs
10.1 g / 0.1 N
|
low risk |
| 30 mm |
52 Gs
5.2 mT
|
0.00 kg / 0.00 lbs
1.4 g / 0.0 N
|
low risk |
| 50 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
low risk |
Table 2: Shear force (vertical surface)
MPL 20x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.23 kg / 2.71 lbs
1230.0 g / 12.1 N
|
| 1 mm | Stal (~0.2) |
0.93 kg / 2.05 lbs
928.0 g / 9.1 N
|
| 2 mm | Stal (~0.2) |
0.66 kg / 1.46 lbs
660.0 g / 6.5 N
|
| 3 mm | Stal (~0.2) |
0.45 kg / 1.00 lbs
452.0 g / 4.4 N
|
| 5 mm | Stal (~0.2) |
0.21 kg / 0.45 lbs
206.0 g / 2.0 N
|
| 10 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
34.0 g / 0.3 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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 (shearing) - behavior on slippery surfaces
MPL 20x10x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.85 kg / 4.07 lbs
1845.0 g / 18.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.23 kg / 2.71 lbs
1230.0 g / 12.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.62 kg / 1.36 lbs
615.0 g / 6.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.08 kg / 6.78 lbs
3075.0 g / 30.2 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 20x10x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.62 kg / 1.36 lbs
615.0 g / 6.0 N
|
| 1 mm |
|
1.54 kg / 3.39 lbs
1537.5 g / 15.1 N
|
| 2 mm |
|
3.08 kg / 6.78 lbs
3075.0 g / 30.2 N
|
| 3 mm |
|
4.61 kg / 10.17 lbs
4612.5 g / 45.2 N
|
| 5 mm |
|
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
| 10 mm |
|
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
| 11 mm |
|
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
| 12 mm |
|
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
Table 5: Working in heat (material behavior) - thermal limit
MPL 20x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
6.15 kg / 13.56 lbs
6150.0 g / 60.3 N
|
OK |
| 40 °C | -2.2% |
6.01 kg / 13.26 lbs
6014.7 g / 59.0 N
|
OK |
| 60 °C | -4.4% |
5.88 kg / 12.96 lbs
5879.4 g / 57.7 N
|
|
| 80 °C | -6.6% |
5.74 kg / 12.66 lbs
5744.1 g / 56.3 N
|
|
| 100 °C | -28.8% |
4.38 kg / 9.65 lbs
4378.8 g / 43.0 N
|
Table 6: Two magnets (attraction) - field range
MPL 20x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
15.04 kg / 33.17 lbs
4 923 Gs
|
2.26 kg / 4.98 lbs
2257 g / 22.1 N
|
N/A |
| 1 mm |
13.20 kg / 29.11 lbs
6 544 Gs
|
1.98 kg / 4.37 lbs
1980 g / 19.4 N
|
11.88 kg / 26.19 lbs
~0 Gs
|
| 2 mm |
11.36 kg / 25.03 lbs
6 069 Gs
|
1.70 kg / 3.76 lbs
1703 g / 16.7 N
|
10.22 kg / 22.53 lbs
~0 Gs
|
| 3 mm |
9.63 kg / 21.22 lbs
5 588 Gs
|
1.44 kg / 3.18 lbs
1444 g / 14.2 N
|
8.66 kg / 19.10 lbs
~0 Gs
|
| 5 mm |
6.71 kg / 14.78 lbs
4 664 Gs
|
1.01 kg / 2.22 lbs
1006 g / 9.9 N
|
6.03 kg / 13.30 lbs
~0 Gs
|
| 10 mm |
2.53 kg / 5.58 lbs
2 865 Gs
|
0.38 kg / 0.84 lbs
380 g / 3.7 N
|
2.28 kg / 5.02 lbs
~0 Gs
|
| 20 mm |
0.41 kg / 0.90 lbs
1 148 Gs
|
0.06 kg / 0.13 lbs
61 g / 0.6 N
|
0.37 kg / 0.81 lbs
~0 Gs
|
| 50 mm |
0.01 kg / 0.02 lbs
165 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 lbs
104 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
69 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
48 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
35 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
26 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) - precautionary measures
MPL 20x10x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.5 cm |
| Car key | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MPL 20x10x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
29.36 km/h
(8.16 m/s)
|
0.25 J | |
| 30 mm |
50.03 km/h
(13.90 m/s)
|
0.72 J | |
| 50 mm |
64.58 km/h
(17.94 m/s)
|
1.21 J | |
| 100 mm |
91.32 km/h
(25.37 m/s)
|
2.41 J |
Table 9: Coating parameters (durability)
MPL 20x10x5 / 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 20x10x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 7 031 Mx | 70.3 µWb |
| Pc Coefficient | 0.42 | Low (Flat) |
Table 11: Submerged application
MPL 20x10x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 6.15 kg | Standard |
| Water (riverbed) |
7.04 kg
(+0.89 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Thermal stability
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also deals
Strengths and weaknesses of Nd2Fe14B magnets.
Advantages
- Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
- Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external magnetic fields,
- By applying a shiny layer of nickel, the element gains an modern look,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
- Possibility of precise modeling as well as adapting to individual applications,
- Key role in innovative solutions – they serve a role in data components, motor assemblies, precision medical tools, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices
Weaknesses
- To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets lose their power 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 start to 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.
- We suggest cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
- Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what it depends on?
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by even structure
- with direct contact (without coatings)
- during pulling in a direction vertical to the plane
- in neutral thermal conditions
Determinants of practical lifting force of a magnet
- Gap (betwixt the magnet and the plate), since 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, rust or dirt).
- Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and holding force.
- Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with neodymium magnets
Crushing risk
Watch your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!
Do not give to children
Absolutely store magnets away from children. Ingestion danger is high, and the effects of magnets clamping inside the body are tragic.
Allergy Warning
Medical facts indicate that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact and select encased magnets.
Impact on smartphones
Note: rare earth magnets produce a field that interferes with precision electronics. Maintain a safe distance from your phone, device, and navigation systems.
Beware of splinters
Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.
Safe distance
Powerful magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.
Operating temperature
Watch the temperature. Heating the magnet to high heat will permanently weaken its properties and pulling force.
Flammability
Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Medical implants
Patients with a ICD must maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.
Respect the power
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.
