MPL 50x50x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020167
GTIN/EAN: 5906301811732
length
50 mm [±0,1 mm]
Width
50 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
187.5 g
Magnetization Direction
↑ axial
Load capacity
33.73 kg / 330.92 N
Magnetic Induction
209.75 mT / 2097 Gs
Coating
[NiCuNi] Nickel
42.88 ZŁ with VAT / pcs + price for transport
34.86 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 22 499 98 98
alternatively contact us using
form
through our site.
Parameters and appearance of neodymium magnets can be analyzed on our
magnetic calculator.
Orders submitted before 14:00 will be dispatched today!
Physical properties - MPL 50x50x10 / N38 - lamellar magnet
Specification / characteristics - MPL 50x50x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020167 |
| GTIN/EAN | 5906301811732 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 50 mm [±0,1 mm] |
| Width | 50 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 187.5 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 33.73 kg / 330.92 N |
| Magnetic Induction ~ ? | 209.75 mT / 2097 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 analysis of the assembly - report
Presented values represent the outcome of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Use these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - characteristics
MPL 50x50x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2097 Gs
209.7 mT
|
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
|
dangerous! |
| 1 mm |
2056 Gs
205.6 mT
|
32.43 kg / 71.50 LBS
32430.0 g / 318.1 N
|
dangerous! |
| 2 mm |
2009 Gs
200.9 mT
|
30.96 kg / 68.27 LBS
30964.6 g / 303.8 N
|
dangerous! |
| 3 mm |
1957 Gs
195.7 mT
|
29.38 kg / 64.77 LBS
29380.4 g / 288.2 N
|
dangerous! |
| 5 mm |
1841 Gs
184.1 mT
|
25.99 kg / 57.30 LBS
25992.3 g / 255.0 N
|
dangerous! |
| 10 mm |
1514 Gs
151.4 mT
|
17.58 kg / 38.75 LBS
17577.6 g / 172.4 N
|
dangerous! |
| 15 mm |
1194 Gs
119.4 mT
|
10.93 kg / 24.10 LBS
10931.8 g / 107.2 N
|
dangerous! |
| 20 mm |
922 Gs
92.2 mT
|
6.51 kg / 14.36 LBS
6512.2 g / 63.9 N
|
warning |
| 30 mm |
543 Gs
54.3 mT
|
2.26 kg / 4.98 LBS
2260.0 g / 22.2 N
|
warning |
| 50 mm |
209 Gs
20.9 mT
|
0.33 kg / 0.74 LBS
334.1 g / 3.3 N
|
safe |
Table 2: Shear force (wall)
MPL 50x50x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
6.75 kg / 14.87 LBS
6746.0 g / 66.2 N
|
| 1 mm | Stal (~0.2) |
6.49 kg / 14.30 LBS
6486.0 g / 63.6 N
|
| 2 mm | Stal (~0.2) |
6.19 kg / 13.65 LBS
6192.0 g / 60.7 N
|
| 3 mm | Stal (~0.2) |
5.88 kg / 12.95 LBS
5876.0 g / 57.6 N
|
| 5 mm | Stal (~0.2) |
5.20 kg / 11.46 LBS
5198.0 g / 51.0 N
|
| 10 mm | Stal (~0.2) |
3.52 kg / 7.75 LBS
3516.0 g / 34.5 N
|
| 15 mm | Stal (~0.2) |
2.19 kg / 4.82 LBS
2186.0 g / 21.4 N
|
| 20 mm | Stal (~0.2) |
1.30 kg / 2.87 LBS
1302.0 g / 12.8 N
|
| 30 mm | Stal (~0.2) |
0.45 kg / 1.00 LBS
452.0 g / 4.4 N
|
| 50 mm | Stal (~0.2) |
0.07 kg / 0.15 LBS
66.0 g / 0.6 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MPL 50x50x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
10.12 kg / 22.31 LBS
10119.0 g / 99.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.75 kg / 14.87 LBS
6746.0 g / 66.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.37 kg / 7.44 LBS
3373.0 g / 33.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
16.87 kg / 37.18 LBS
16865.0 g / 165.4 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 50x50x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.69 kg / 3.72 LBS
1686.5 g / 16.5 N
|
| 1 mm |
|
4.22 kg / 9.30 LBS
4216.3 g / 41.4 N
|
| 2 mm |
|
8.43 kg / 18.59 LBS
8432.5 g / 82.7 N
|
| 3 mm |
|
12.65 kg / 27.89 LBS
12648.8 g / 124.1 N
|
| 5 mm |
|
21.08 kg / 46.48 LBS
21081.2 g / 206.8 N
|
| 10 mm |
|
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
|
| 11 mm |
|
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
|
| 12 mm |
|
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 50x50x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
33.73 kg / 74.36 LBS
33730.0 g / 330.9 N
|
OK |
| 40 °C | -2.2% |
32.99 kg / 72.73 LBS
32987.9 g / 323.6 N
|
OK |
| 60 °C | -4.4% |
32.25 kg / 71.09 LBS
32245.9 g / 316.3 N
|
|
| 80 °C | -6.6% |
31.50 kg / 69.45 LBS
31503.8 g / 309.1 N
|
|
| 100 °C | -28.8% |
24.02 kg / 52.95 LBS
24015.8 g / 235.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 50x50x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
67.80 kg / 149.46 LBS
3 611 Gs
|
10.17 kg / 22.42 LBS
10169 g / 99.8 N
|
N/A |
| 1 mm |
66.54 kg / 146.70 LBS
4 156 Gs
|
9.98 kg / 22.01 LBS
9982 g / 97.9 N
|
59.89 kg / 132.03 LBS
~0 Gs
|
| 2 mm |
65.18 kg / 143.70 LBS
4 113 Gs
|
9.78 kg / 21.56 LBS
9777 g / 95.9 N
|
58.66 kg / 129.33 LBS
~0 Gs
|
| 3 mm |
63.74 kg / 140.53 LBS
4 067 Gs
|
9.56 kg / 21.08 LBS
9562 g / 93.8 N
|
57.37 kg / 126.48 LBS
~0 Gs
|
| 5 mm |
60.67 kg / 133.75 LBS
3 968 Gs
|
9.10 kg / 20.06 LBS
9101 g / 89.3 N
|
54.60 kg / 120.38 LBS
~0 Gs
|
| 10 mm |
52.24 kg / 115.18 LBS
3 682 Gs
|
7.84 kg / 17.28 LBS
7836 g / 76.9 N
|
47.02 kg / 103.66 LBS
~0 Gs
|
| 20 mm |
35.33 kg / 77.89 LBS
3 028 Gs
|
5.30 kg / 11.68 LBS
5299 g / 52.0 N
|
31.80 kg / 70.10 LBS
~0 Gs
|
| 50 mm |
7.69 kg / 16.96 LBS
1 413 Gs
|
1.15 kg / 2.54 LBS
1154 g / 11.3 N
|
6.92 kg / 15.26 LBS
~0 Gs
|
| 60 mm |
4.54 kg / 10.01 LBS
1 086 Gs
|
0.68 kg / 1.50 LBS
681 g / 6.7 N
|
4.09 kg / 9.01 LBS
~0 Gs
|
| 70 mm |
2.72 kg / 6.01 LBS
841 Gs
|
0.41 kg / 0.90 LBS
409 g / 4.0 N
|
2.45 kg / 5.41 LBS
~0 Gs
|
| 80 mm |
1.67 kg / 3.68 LBS
658 Gs
|
0.25 kg / 0.55 LBS
250 g / 2.5 N
|
1.50 kg / 3.31 LBS
~0 Gs
|
| 90 mm |
1.05 kg / 2.31 LBS
521 Gs
|
0.16 kg / 0.35 LBS
157 g / 1.5 N
|
0.94 kg / 2.08 LBS
~0 Gs
|
| 100 mm |
0.67 kg / 1.48 LBS
417 Gs
|
0.10 kg / 0.22 LBS
101 g / 1.0 N
|
0.60 kg / 1.33 LBS
~0 Gs
|
Table 7: Hazards (implants) - warnings
MPL 50x50x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 21.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 16.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 13.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 10.0 cm |
| Car key | 50 Gs (5.0 mT) | 9.5 cm |
| Payment card | 400 Gs (40.0 mT) | 4.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Dynamics (kinetic energy) - warning
MPL 50x50x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
17.38 km/h
(4.83 m/s)
|
2.19 J | |
| 30 mm |
24.39 km/h
(6.78 m/s)
|
4.30 J | |
| 50 mm |
30.43 km/h
(8.45 m/s)
|
6.70 J | |
| 100 mm |
42.78 km/h
(11.88 m/s)
|
13.24 J |
Table 9: Coating parameters (durability)
MPL 50x50x10 / 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 50x50x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 61 501 Mx | 615.0 µWb |
| Pc Coefficient | 0.26 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 50x50x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 33.73 kg | Standard |
| Water (riverbed) |
38.62 kg
(+4.89 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. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) severely reduces the holding force.
3. Power loss vs temp
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.26
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out more products
Strengths and weaknesses of Nd2Fe14B magnets.
Strengths
- They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
- Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external magnetic fields,
- A magnet with a smooth nickel surface has better aesthetics,
- The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Thanks to versatility in forming and the capacity to customize to client solutions,
- Fundamental importance in high-tech industry – they serve a role in mass storage devices, brushless drives, medical devices, also other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease 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
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of making threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products are able to complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a plate made of structural steel, perfectly concentrating the magnetic field
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- without any air gap between the magnet and steel
- under perpendicular force direction (90-degree angle)
- in temp. approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Air gap (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
- Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Plate material – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
- Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
- Thermal environment – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Lifting capacity was measured using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Adults only
Strictly store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are life-threatening.
Fire risk
Powder generated during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.
GPS Danger
Be aware: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, tablet, and GPS.
Protect data
Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Life threat
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Bodily injuries
Large magnets can break fingers in a fraction of a second. Never place your hand between two strong magnets.
Power loss in heat
Control the heat. Heating the magnet to high heat will destroy its properties and strength.
Conscious usage
Be careful. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can move away.
Avoid contact if allergic
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and wear gloves.
Eye protection
Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
