MPL 50x20x20 / N38 - lamellar magnet
lamellar magnet
Catalog no 020166
GTIN/EAN: 5906301811725
length
50 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
20 mm [±0,1 mm]
Weight
150 g
Magnetization Direction
↑ axial
Load capacity
42.18 kg / 413.81 N
Magnetic Induction
478.99 mT / 4790 Gs
Coating
[NiCuNi] Nickel
47.32 ZŁ with VAT / pcs + price for transport
38.47 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 888 99 98 98
alternatively let us know via
form
the contact page.
Strength and structure of magnets can be tested with our
magnetic mass calculator.
Order by 14:00 and we’ll ship today!
Physical properties - MPL 50x20x20 / N38 - lamellar magnet
Specification / characteristics - MPL 50x20x20 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020166 |
| GTIN/EAN | 5906301811725 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 50 mm [±0,1 mm] |
| Width | 20 mm [±0,1 mm] |
| Height | 20 mm [±0,1 mm] |
| Weight | 150 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 42.18 kg / 413.81 N |
| Magnetic Induction ~ ? | 478.99 mT / 4790 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 - technical parameters
These values constitute the direct effect of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Please consider these calculations as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - power drop
MPL 50x20x20 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4789 Gs
478.9 mT
|
42.18 kg / 92.99 LBS
42180.0 g / 413.8 N
|
critical level |
| 1 mm |
4452 Gs
445.2 mT
|
36.46 kg / 80.38 LBS
36461.5 g / 357.7 N
|
critical level |
| 2 mm |
4114 Gs
411.4 mT
|
31.13 kg / 68.62 LBS
31126.5 g / 305.4 N
|
critical level |
| 3 mm |
3784 Gs
378.4 mT
|
26.34 kg / 58.06 LBS
26336.3 g / 258.4 N
|
critical level |
| 5 mm |
3173 Gs
317.3 mT
|
18.52 kg / 40.84 LBS
18523.4 g / 181.7 N
|
critical level |
| 10 mm |
2022 Gs
202.2 mT
|
7.52 kg / 16.59 LBS
7522.9 g / 73.8 N
|
medium risk |
| 15 mm |
1324 Gs
132.4 mT
|
3.22 kg / 7.10 LBS
3222.6 g / 31.6 N
|
medium risk |
| 20 mm |
899 Gs
89.9 mT
|
1.49 kg / 3.28 LBS
1487.5 g / 14.6 N
|
low risk |
| 30 mm |
458 Gs
45.8 mT
|
0.39 kg / 0.85 LBS
385.8 g / 3.8 N
|
low risk |
| 50 mm |
159 Gs
15.9 mT
|
0.05 kg / 0.10 LBS
46.4 g / 0.5 N
|
low risk |
Table 2: Shear capacity (vertical surface)
MPL 50x20x20 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
8.44 kg / 18.60 LBS
8436.0 g / 82.8 N
|
| 1 mm | Stal (~0.2) |
7.29 kg / 16.08 LBS
7292.0 g / 71.5 N
|
| 2 mm | Stal (~0.2) |
6.23 kg / 13.73 LBS
6226.0 g / 61.1 N
|
| 3 mm | Stal (~0.2) |
5.27 kg / 11.61 LBS
5268.0 g / 51.7 N
|
| 5 mm | Stal (~0.2) |
3.70 kg / 8.17 LBS
3704.0 g / 36.3 N
|
| 10 mm | Stal (~0.2) |
1.50 kg / 3.32 LBS
1504.0 g / 14.8 N
|
| 15 mm | Stal (~0.2) |
0.64 kg / 1.42 LBS
644.0 g / 6.3 N
|
| 20 mm | Stal (~0.2) |
0.30 kg / 0.66 LBS
298.0 g / 2.9 N
|
| 30 mm | Stal (~0.2) |
0.08 kg / 0.17 LBS
78.0 g / 0.8 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 50x20x20 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
12.65 kg / 27.90 LBS
12654.0 g / 124.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
8.44 kg / 18.60 LBS
8436.0 g / 82.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.22 kg / 9.30 LBS
4218.0 g / 41.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
21.09 kg / 46.50 LBS
21090.0 g / 206.9 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 50x20x20 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.11 kg / 4.65 LBS
2109.0 g / 20.7 N
|
| 1 mm |
|
5.27 kg / 11.62 LBS
5272.5 g / 51.7 N
|
| 2 mm |
|
10.55 kg / 23.25 LBS
10545.0 g / 103.4 N
|
| 3 mm |
|
15.82 kg / 34.87 LBS
15817.5 g / 155.2 N
|
| 5 mm |
|
26.36 kg / 58.12 LBS
26362.5 g / 258.6 N
|
| 10 mm |
|
42.18 kg / 92.99 LBS
42180.0 g / 413.8 N
|
| 11 mm |
|
42.18 kg / 92.99 LBS
42180.0 g / 413.8 N
|
| 12 mm |
|
42.18 kg / 92.99 LBS
42180.0 g / 413.8 N
|
Table 5: Thermal resistance (stability) - power drop
MPL 50x20x20 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
42.18 kg / 92.99 LBS
42180.0 g / 413.8 N
|
OK |
| 40 °C | -2.2% |
41.25 kg / 90.95 LBS
41252.0 g / 404.7 N
|
OK |
| 60 °C | -4.4% |
40.32 kg / 88.90 LBS
40324.1 g / 395.6 N
|
OK |
| 80 °C | -6.6% |
39.40 kg / 86.85 LBS
39396.1 g / 386.5 N
|
|
| 100 °C | -28.8% |
30.03 kg / 66.21 LBS
30032.2 g / 294.6 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 50x20x20 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
141.37 kg / 311.66 LBS
5 687 Gs
|
21.21 kg / 46.75 LBS
21205 g / 208.0 N
|
N/A |
| 1 mm |
131.73 kg / 290.41 LBS
9 245 Gs
|
19.76 kg / 43.56 LBS
19759 g / 193.8 N
|
118.55 kg / 261.37 LBS
~0 Gs
|
| 2 mm |
122.20 kg / 269.41 LBS
8 904 Gs
|
18.33 kg / 40.41 LBS
18330 g / 179.8 N
|
109.98 kg / 242.47 LBS
~0 Gs
|
| 3 mm |
113.05 kg / 249.23 LBS
8 564 Gs
|
16.96 kg / 37.38 LBS
16957 g / 166.4 N
|
101.74 kg / 224.31 LBS
~0 Gs
|
| 5 mm |
96.05 kg / 211.76 LBS
7 894 Gs
|
14.41 kg / 31.76 LBS
14408 g / 141.3 N
|
86.45 kg / 190.58 LBS
~0 Gs
|
| 10 mm |
62.08 kg / 136.87 LBS
6 347 Gs
|
9.31 kg / 20.53 LBS
9312 g / 91.4 N
|
55.87 kg / 123.18 LBS
~0 Gs
|
| 20 mm |
25.21 kg / 55.59 LBS
4 045 Gs
|
3.78 kg / 8.34 LBS
3782 g / 37.1 N
|
22.69 kg / 50.03 LBS
~0 Gs
|
| 50 mm |
2.46 kg / 5.43 LBS
1 264 Gs
|
0.37 kg / 0.81 LBS
370 g / 3.6 N
|
2.22 kg / 4.89 LBS
~0 Gs
|
| 60 mm |
1.29 kg / 2.85 LBS
916 Gs
|
0.19 kg / 0.43 LBS
194 g / 1.9 N
|
1.16 kg / 2.57 LBS
~0 Gs
|
| 70 mm |
0.71 kg / 1.58 LBS
681 Gs
|
0.11 kg / 0.24 LBS
107 g / 1.1 N
|
0.64 kg / 1.42 LBS
~0 Gs
|
| 80 mm |
0.41 kg / 0.91 LBS
518 Gs
|
0.06 kg / 0.14 LBS
62 g / 0.6 N
|
0.37 kg / 0.82 LBS
~0 Gs
|
| 90 mm |
0.25 kg / 0.55 LBS
402 Gs
|
0.04 kg / 0.08 LBS
37 g / 0.4 N
|
0.22 kg / 0.49 LBS
~0 Gs
|
| 100 mm |
0.16 kg / 0.34 LBS
318 Gs
|
0.02 kg / 0.05 LBS
23 g / 0.2 N
|
0.14 kg / 0.31 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 50x20x20 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 19.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 15.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 11.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 9.0 cm |
| Remote | 50 Gs (5.0 mT) | 8.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Collisions (kinetic energy) - warning
MPL 50x20x20 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
18.70 km/h
(5.20 m/s)
|
2.02 J | |
| 30 mm |
29.46 km/h
(8.18 m/s)
|
5.02 J | |
| 50 mm |
37.84 km/h
(10.51 m/s)
|
8.29 J | |
| 100 mm |
53.48 km/h
(14.86 m/s)
|
16.55 J |
Table 9: Coating parameters (durability)
MPL 50x20x20 / 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 50x20x20 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 46 654 Mx | 466.5 µWb |
| Pc Coefficient | 0.63 | High (Stable) |
Table 11: Submerged application
MPL 50x20x20 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 42.18 kg | Standard |
| Water (riverbed) |
48.30 kg
(+6.12 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds merely ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Heat tolerance
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.63
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.
Material specification
| 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 |
Check out more deals
Pros as well as cons of neodymium magnets.
Advantages
- Their magnetic field remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
- Neodymium magnets are extremely resistant to magnetic field loss caused by external magnetic fields,
- In other words, due to the aesthetic surface of gold, the element gains visual value,
- They feature high magnetic induction at the operating surface, making them more effective,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to freedom in constructing and the ability to modify to specific needs,
- Universal use in advanced technology sectors – they find application in hard drives, electromotive mechanisms, precision medical tools, as well as technologically advanced constructions.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of producing nuts in the magnet and complicated shapes - recommended is casing - magnetic holder.
- Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Detachment force of the magnet in optimal conditions – what contributes to it?
- using a sheet made of high-permeability steel, serving as a ideal flux conductor
- with a cross-section minimum 10 mm
- with an polished contact surface
- with direct contact (no impurities)
- under axial force direction (90-degree angle)
- at room temperature
Determinants of practical lifting force of a magnet
- Clearance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
- Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.
Safety rules for work with NdFeB magnets
Conscious usage
Handle with care. Neodymium magnets act from a distance and snap with huge force, often faster than you can react.
Health Danger
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Permanent damage
Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.
Crushing risk
Pinching hazard: The pulling power is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.
No play value
These products are not suitable for play. Accidental ingestion of multiple magnets may result in them attracting across intestines, which poses a severe health hazard and requires urgent medical intervention.
Keep away from electronics
A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.
Data carriers
Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.
Material brittleness
NdFeB magnets are ceramic materials, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.
Machining danger
Machining of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Allergic reactions
Studies show that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select versions in plastic housing.
