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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Technical details - 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 |
Physical modeling of the product - technical parameters
These information represent the outcome of a mathematical analysis. Results were calculated on models for the material Nd2Fe14B. Operational conditions might slightly differ. Treat these data as a reference point during assembly planning.
Table 1: Static force (pull vs gap) - power drop
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 lbs
29990.0 g / 294.2 N
|
crushing |
| 1 mm |
3158 Gs
315.8 mT
|
26.32 kg / 58.03 lbs
26323.3 g / 258.2 N
|
crushing |
| 2 mm |
2932 Gs
293.2 mT
|
22.69 kg / 50.02 lbs
22687.6 g / 222.6 N
|
crushing |
| 3 mm |
2703 Gs
270.3 mT
|
19.29 kg / 42.52 lbs
19286.7 g / 189.2 N
|
crushing |
| 5 mm |
2266 Gs
226.6 mT
|
13.55 kg / 29.86 lbs
13546.3 g / 132.9 N
|
crushing |
| 10 mm |
1419 Gs
141.9 mT
|
5.31 kg / 11.71 lbs
5313.0 g / 52.1 N
|
warning |
| 15 mm |
908 Gs
90.8 mT
|
2.17 kg / 4.79 lbs
2174.5 g / 21.3 N
|
warning |
| 20 mm |
603 Gs
60.3 mT
|
0.96 kg / 2.12 lbs
961.0 g / 9.4 N
|
low risk |
| 30 mm |
296 Gs
29.6 mT
|
0.23 kg / 0.51 lbs
231.0 g / 2.3 N
|
low risk |
| 50 mm |
97 Gs
9.7 mT
|
0.02 kg / 0.05 lbs
24.8 g / 0.2 N
|
low risk |
Table 2: Shear 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 lbs
5998.0 g / 58.8 N
|
| 1 mm | Stal (~0.2) |
5.26 kg / 11.61 lbs
5264.0 g / 51.6 N
|
| 2 mm | Stal (~0.2) |
4.54 kg / 10.00 lbs
4538.0 g / 44.5 N
|
| 3 mm | Stal (~0.2) |
3.86 kg / 8.51 lbs
3858.0 g / 37.8 N
|
| 5 mm | Stal (~0.2) |
2.71 kg / 5.97 lbs
2710.0 g / 26.6 N
|
| 10 mm | Stal (~0.2) |
1.06 kg / 2.34 lbs
1062.0 g / 10.4 N
|
| 15 mm | Stal (~0.2) |
0.43 kg / 0.96 lbs
434.0 g / 4.3 N
|
| 20 mm | Stal (~0.2) |
0.19 kg / 0.42 lbs
192.0 g / 1.9 N
|
| 30 mm | Stal (~0.2) |
0.05 kg / 0.10 lbs
46.0 g / 0.5 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - 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 lbs
8997.0 g / 88.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.00 kg / 13.22 lbs
5998.0 g / 58.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.00 kg / 6.61 lbs
2999.0 g / 29.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
15.00 kg / 33.06 lbs
14995.0 g / 147.1 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 50x20x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.50 kg / 3.31 lbs
1499.5 g / 14.7 N
|
| 1 mm |
|
3.75 kg / 8.26 lbs
3748.8 g / 36.8 N
|
| 2 mm |
|
7.50 kg / 16.53 lbs
7497.5 g / 73.6 N
|
| 3 mm |
|
11.25 kg / 24.79 lbs
11246.3 g / 110.3 N
|
| 5 mm |
|
18.74 kg / 41.32 lbs
18743.8 g / 183.9 N
|
| 10 mm |
|
29.99 kg / 66.12 lbs
29990.0 g / 294.2 N
|
| 11 mm |
|
29.99 kg / 66.12 lbs
29990.0 g / 294.2 N
|
| 12 mm |
|
29.99 kg / 66.12 lbs
29990.0 g / 294.2 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 50x20x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
29.99 kg / 66.12 lbs
29990.0 g / 294.2 N
|
OK |
| 40 °C | -2.2% |
29.33 kg / 64.66 lbs
29330.2 g / 287.7 N
|
OK |
| 60 °C | -4.4% |
28.67 kg / 63.21 lbs
28670.4 g / 281.3 N
|
|
| 80 °C | -6.6% |
28.01 kg / 61.75 lbs
28010.7 g / 274.8 N
|
|
| 100 °C | -28.8% |
21.35 kg / 47.07 lbs
21352.9 g / 209.5 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 50x20x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
70.06 kg / 154.45 lbs
4 789 Gs
|
10.51 kg / 23.17 lbs
10509 g / 103.1 N
|
N/A |
| 1 mm |
65.83 kg / 145.13 lbs
6 535 Gs
|
9.87 kg / 21.77 lbs
9874 g / 96.9 N
|
59.25 kg / 130.61 lbs
~0 Gs
|
| 2 mm |
61.49 kg / 135.57 lbs
6 316 Gs
|
9.22 kg / 20.34 lbs
9224 g / 90.5 N
|
55.34 kg / 122.01 lbs
~0 Gs
|
| 3 mm |
57.20 kg / 126.10 lbs
6 092 Gs
|
8.58 kg / 18.92 lbs
8580 g / 84.2 N
|
51.48 kg / 113.49 lbs
~0 Gs
|
| 5 mm |
48.94 kg / 107.89 lbs
5 635 Gs
|
7.34 kg / 16.18 lbs
7341 g / 72.0 N
|
44.05 kg / 97.10 lbs
~0 Gs
|
| 10 mm |
31.64 kg / 69.76 lbs
4 531 Gs
|
4.75 kg / 10.46 lbs
4747 g / 46.6 N
|
28.48 kg / 62.79 lbs
~0 Gs
|
| 20 mm |
12.41 kg / 27.36 lbs
2 838 Gs
|
1.86 kg / 4.10 lbs
1862 g / 18.3 N
|
11.17 kg / 24.63 lbs
~0 Gs
|
| 50 mm |
1.07 kg / 2.35 lbs
832 Gs
|
0.16 kg / 0.35 lbs
160 g / 1.6 N
|
0.96 kg / 2.12 lbs
~0 Gs
|
| 60 mm |
0.54 kg / 1.19 lbs
592 Gs
|
0.08 kg / 0.18 lbs
81 g / 0.8 N
|
0.49 kg / 1.07 lbs
~0 Gs
|
| 70 mm |
0.29 kg / 0.64 lbs
433 Gs
|
0.04 kg / 0.10 lbs
43 g / 0.4 N
|
0.26 kg / 0.57 lbs
~0 Gs
|
| 80 mm |
0.16 kg / 0.36 lbs
324 Gs
|
0.02 kg / 0.05 lbs
24 g / 0.2 N
|
0.15 kg / 0.32 lbs
~0 Gs
|
| 90 mm |
0.10 kg / 0.21 lbs
248 Gs
|
0.01 kg / 0.03 lbs
14 g / 0.1 N
|
0.09 kg / 0.19 lbs
~0 Gs
|
| 100 mm |
0.06 kg / 0.13 lbs
194 Gs
|
0.01 kg / 0.02 lbs
9 g / 0.1 N
|
0.05 kg / 0.11 lbs
~0 Gs
|
Table 7: Protective zones (implants) - warnings
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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 7.5 cm |
| Car key | 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: Collisions (kinetic energy) - warning
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)
*Note: On a vertical wall, the magnet holds only approx. 20-30% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Power loss vs temp
*For standard magnets, the critical 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of Nd2Fe14B magnets.
Pros
- They do not lose power, even over around 10 years – the drop in strength is only ~1% (based on measurements),
- They are resistant to demagnetization induced by external field influence,
- Thanks to the shiny finish, the plating of Ni-Cu-Ni, gold, or silver gives an modern appearance,
- Neodymium magnets achieve maximum magnetic induction on a their surface, which ensures high operational effectiveness,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
- Thanks to modularity in forming and the capacity to adapt to client solutions,
- Versatile presence in future technologies – they are used in magnetic memories, electric motors, precision medical tools, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in small systems
Limitations
- At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these products are able to be problematic in diagnostics medical when they are in the body.
- Due to neodymium price, their price is relatively high,
Pull force analysis
Maximum holding power of the magnet – what affects it?
- using a sheet made of mild steel, acting as a magnetic yoke
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- characterized by smoothness
- without the slightest clearance between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- at conditions approx. 20°C
What influences lifting capacity in practice
- Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Base massiveness – insufficiently thick steel does not close the flux, causing part of the flux to be escaped into the air.
- Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the holding force.
H&S for magnets
No play value
Strictly store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are life-threatening.
Crushing risk
Large magnets can smash fingers instantly. Under no circumstances place your hand between two attracting surfaces.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.
Magnetic interference
A strong magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.
Power loss in heat
Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.
Shattering risk
Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Fire risk
Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
Powerful field
Handle magnets with awareness. Their powerful strength can shock even professionals. Be vigilant and do not underestimate their power.
Implant safety
For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.
Safe distance
Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.
