MPL 50x20x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020165
GTIN/EAN: 5906301811718
length
50 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
75 g
Magnetization Direction
↑ axial
Load capacity
29.99 kg / 294.15 N
Magnetic Induction
337.18 mT / 3372 Gs
Coating
[NiCuNi] Nickel
43.05 ZŁ with VAT / pcs + price for transport
35.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Detailed specification - MPL 50x20x10 / N38 - lamellar magnet
Specification / characteristics - MPL 50x20x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020165 |
| GTIN/EAN | 5906301811718 |
| 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 | 10 mm [±0,1 mm] |
| Weight | 75 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 29.99 kg / 294.15 N |
| Magnetic Induction ~ ? | 337.18 mT / 3372 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 simulation of the magnet - technical parameters
These data are the result of a physical calculation. Values were calculated on models for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs distance) - interaction chart
MPL 50x20x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3371 Gs
337.1 mT
|
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
|
dangerous! |
| 1 mm |
3158 Gs
315.8 mT
|
26.32 kg / 58.03 pounds
26323.3 g / 258.2 N
|
dangerous! |
| 2 mm |
2932 Gs
293.2 mT
|
22.69 kg / 50.02 pounds
22687.6 g / 222.6 N
|
dangerous! |
| 3 mm |
2703 Gs
270.3 mT
|
19.29 kg / 42.52 pounds
19286.7 g / 189.2 N
|
dangerous! |
| 5 mm |
2266 Gs
226.6 mT
|
13.55 kg / 29.86 pounds
13546.3 g / 132.9 N
|
dangerous! |
| 10 mm |
1419 Gs
141.9 mT
|
5.31 kg / 11.71 pounds
5313.0 g / 52.1 N
|
warning |
| 15 mm |
908 Gs
90.8 mT
|
2.17 kg / 4.79 pounds
2174.5 g / 21.3 N
|
warning |
| 20 mm |
603 Gs
60.3 mT
|
0.96 kg / 2.12 pounds
961.0 g / 9.4 N
|
weak grip |
| 30 mm |
296 Gs
29.6 mT
|
0.23 kg / 0.51 pounds
231.0 g / 2.3 N
|
weak grip |
| 50 mm |
97 Gs
9.7 mT
|
0.02 kg / 0.05 pounds
24.8 g / 0.2 N
|
weak grip |
Table 2: Slippage load (wall)
MPL 50x20x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
|
| 1 mm | Stal (~0.2) |
5.26 kg / 11.61 pounds
5264.0 g / 51.6 N
|
| 2 mm | Stal (~0.2) |
4.54 kg / 10.00 pounds
4538.0 g / 44.5 N
|
| 3 mm | Stal (~0.2) |
3.86 kg / 8.51 pounds
3858.0 g / 37.8 N
|
| 5 mm | Stal (~0.2) |
2.71 kg / 5.97 pounds
2710.0 g / 26.6 N
|
| 10 mm | Stal (~0.2) |
1.06 kg / 2.34 pounds
1062.0 g / 10.4 N
|
| 15 mm | Stal (~0.2) |
0.43 kg / 0.96 pounds
434.0 g / 4.3 N
|
| 20 mm | Stal (~0.2) |
0.19 kg / 0.42 pounds
192.0 g / 1.9 N
|
| 30 mm | Stal (~0.2) |
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MPL 50x20x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
9.00 kg / 19.83 pounds
8997.0 g / 88.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.00 kg / 6.61 pounds
2999.0 g / 29.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
15.00 kg / 33.06 pounds
14995.0 g / 147.1 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 50x20x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.50 kg / 3.31 pounds
1499.5 g / 14.7 N
|
| 1 mm |
|
3.75 kg / 8.26 pounds
3748.8 g / 36.8 N
|
| 2 mm |
|
7.50 kg / 16.53 pounds
7497.5 g / 73.6 N
|
| 3 mm |
|
11.25 kg / 24.79 pounds
11246.3 g / 110.3 N
|
| 5 mm |
|
18.74 kg / 41.32 pounds
18743.8 g / 183.9 N
|
| 10 mm |
|
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
|
| 11 mm |
|
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
|
| 12 mm |
|
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 50x20x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
|
OK |
| 40 °C | -2.2% |
29.33 kg / 64.66 pounds
29330.2 g / 287.7 N
|
OK |
| 60 °C | -4.4% |
28.67 kg / 63.21 pounds
28670.4 g / 281.3 N
|
|
| 80 °C | -6.6% |
28.01 kg / 61.75 pounds
28010.7 g / 274.8 N
|
|
| 100 °C | -28.8% |
21.35 kg / 47.07 pounds
21352.9 g / 209.5 N
|
Table 6: Two magnets (attraction) - field range
MPL 50x20x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
70.06 kg / 154.45 pounds
4 789 Gs
|
10.51 kg / 23.17 pounds
10509 g / 103.1 N
|
N/A |
| 1 mm |
65.83 kg / 145.13 pounds
6 535 Gs
|
9.87 kg / 21.77 pounds
9874 g / 96.9 N
|
59.25 kg / 130.61 pounds
~0 Gs
|
| 2 mm |
61.49 kg / 135.57 pounds
6 316 Gs
|
9.22 kg / 20.34 pounds
9224 g / 90.5 N
|
55.34 kg / 122.01 pounds
~0 Gs
|
| 3 mm |
57.20 kg / 126.10 pounds
6 092 Gs
|
8.58 kg / 18.92 pounds
8580 g / 84.2 N
|
51.48 kg / 113.49 pounds
~0 Gs
|
| 5 mm |
48.94 kg / 107.89 pounds
5 635 Gs
|
7.34 kg / 16.18 pounds
7341 g / 72.0 N
|
44.05 kg / 97.10 pounds
~0 Gs
|
| 10 mm |
31.64 kg / 69.76 pounds
4 531 Gs
|
4.75 kg / 10.46 pounds
4747 g / 46.6 N
|
28.48 kg / 62.79 pounds
~0 Gs
|
| 20 mm |
12.41 kg / 27.36 pounds
2 838 Gs
|
1.86 kg / 4.10 pounds
1862 g / 18.3 N
|
11.17 kg / 24.63 pounds
~0 Gs
|
| 50 mm |
1.07 kg / 2.35 pounds
832 Gs
|
0.16 kg / 0.35 pounds
160 g / 1.6 N
|
0.96 kg / 2.12 pounds
~0 Gs
|
| 60 mm |
0.54 kg / 1.19 pounds
592 Gs
|
0.08 kg / 0.18 pounds
81 g / 0.8 N
|
0.49 kg / 1.07 pounds
~0 Gs
|
| 70 mm |
0.29 kg / 0.64 pounds
433 Gs
|
0.04 kg / 0.10 pounds
43 g / 0.4 N
|
0.26 kg / 0.57 pounds
~0 Gs
|
| 80 mm |
0.16 kg / 0.36 pounds
324 Gs
|
0.02 kg / 0.05 pounds
24 g / 0.2 N
|
0.15 kg / 0.32 pounds
~0 Gs
|
| 90 mm |
0.10 kg / 0.21 pounds
248 Gs
|
0.01 kg / 0.03 pounds
14 g / 0.1 N
|
0.09 kg / 0.19 pounds
~0 Gs
|
| 100 mm |
0.06 kg / 0.13 pounds
194 Gs
|
0.01 kg / 0.02 pounds
9 g / 0.1 N
|
0.05 kg / 0.11 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
MPL 50x20x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 15.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 12.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 9.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 7.5 cm |
| Remote | 50 Gs (5.0 mT) | 7.0 cm |
| Payment card | 400 Gs (40.0 mT) | 3.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MPL 50x20x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.29 km/h
(6.19 m/s)
|
1.44 J | |
| 30 mm |
35.10 km/h
(9.75 m/s)
|
3.56 J | |
| 50 mm |
45.12 km/h
(12.53 m/s)
|
5.89 J | |
| 100 mm |
63.77 km/h
(17.72 m/s)
|
11.77 J |
Table 9: Anti-corrosion coating durability
MPL 50x20x10 / 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 (Flux)
MPL 50x20x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 32 980 Mx | 329.8 µWb |
| Pc Coefficient | 0.38 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 50x20x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 29.99 kg | Standard |
| Water (riverbed) |
34.34 kg
(+4.35 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet retains merely a fraction of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Temperature resistance
*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) = 0.38
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also offers
Pros and cons of neodymium magnets.
Advantages
- They do not lose power, even over around 10 years – the decrease in lifting capacity is only ~1% (according to tests),
- Neodymium magnets are characterized by highly resistant to magnetic field loss caused by external field sources,
- A magnet with a shiny gold surface has better aesthetics,
- The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to versatility in shaping and the capacity to adapt to individual projects,
- Significant place in high-tech industry – they serve a role in hard drives, brushless drives, diagnostic systems, and other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in realizing threads and complex forms in magnets, we recommend using casing - magnetic mechanism.
- Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets can complicate diagnosis medical when they are in the body.
- Due to complex production process, their price is relatively high,
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what affects it?
- on a base made of structural steel, optimally conducting the magnetic field
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by even structure
- without the slightest air gap between the magnet and steel
- under perpendicular force direction (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Lifting capacity in real conditions – factors
- Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Plate thickness – too thin plate does not close the flux, causing part of the power to be lost to the other side.
- Material type – the best choice is high-permeability steel. Stainless steels may attract less.
- Surface structure – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.
Safety rules for work with NdFeB magnets
Operating temperature
Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Dust is flammable
Powder generated during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
Electronic devices
Equipment safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, timepieces).
Nickel coating and allergies
It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands or opt for encased magnets.
Threat to navigation
A strong magnetic field disrupts the operation of compasses in phones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.
Medical interference
Warning for patients: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.
This is not a toy
Always keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.
Protective goggles
NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them breaking into shards.
Crushing risk
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Handling guide
Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
