MPL 30x10x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020138
GTIN/EAN: 5906301811442
length
30 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.25 g
Magnetization Direction
↑ axial
Load capacity
8.89 kg / 87.23 N
Magnetic Induction
329.52 mT / 3295 Gs
Coating
[NiCuNi] Nickel
4.26 ZŁ with VAT / pcs + price for transport
3.46 ZŁ net + 23% VAT / pcs
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Technical of the product - MPL 30x10x5 / N38 - lamellar magnet
Specification / characteristics - MPL 30x10x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020138 |
| GTIN/EAN | 5906301811442 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 11.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 8.89 kg / 87.23 N |
| Magnetic Induction ~ ? | 329.52 mT / 3295 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 simulation of the magnet - technical parameters
Presented data represent the direct effect of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs distance) - characteristics
MPL 30x10x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3294 Gs
329.4 mT
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
warning |
| 1 mm |
2866 Gs
286.6 mT
|
6.73 kg / 14.84 pounds
6731.1 g / 66.0 N
|
warning |
| 2 mm |
2424 Gs
242.4 mT
|
4.82 kg / 10.62 pounds
4816.4 g / 47.2 N
|
warning |
| 3 mm |
2022 Gs
202.2 mT
|
3.35 kg / 7.38 pounds
3349.6 g / 32.9 N
|
warning |
| 5 mm |
1397 Gs
139.7 mT
|
1.60 kg / 3.53 pounds
1600.3 g / 15.7 N
|
safe |
| 10 mm |
615 Gs
61.5 mT
|
0.31 kg / 0.68 pounds
309.8 g / 3.0 N
|
safe |
| 15 mm |
314 Gs
31.4 mT
|
0.08 kg / 0.18 pounds
80.6 g / 0.8 N
|
safe |
| 20 mm |
177 Gs
17.7 mT
|
0.03 kg / 0.06 pounds
25.8 g / 0.3 N
|
safe |
| 30 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
safe |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
safe |
Table 2: Slippage load (wall)
MPL 30x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
|
| 1 mm | Stal (~0.2) |
1.35 kg / 2.97 pounds
1346.0 g / 13.2 N
|
| 2 mm | Stal (~0.2) |
0.96 kg / 2.13 pounds
964.0 g / 9.5 N
|
| 3 mm | Stal (~0.2) |
0.67 kg / 1.48 pounds
670.0 g / 6.6 N
|
| 5 mm | Stal (~0.2) |
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 10 mm | Stal (~0.2) |
0.06 kg / 0.14 pounds
62.0 g / 0.6 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
16.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MPL 30x10x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.67 kg / 5.88 pounds
2667.0 g / 26.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
|
Table 4: Steel thickness (saturation) - power losses
MPL 30x10x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
|
| 1 mm |
|
2.22 kg / 4.90 pounds
2222.5 g / 21.8 N
|
| 2 mm |
|
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
|
| 3 mm |
|
6.67 kg / 14.70 pounds
6667.5 g / 65.4 N
|
| 5 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 10 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 11 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 12 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
Table 5: Thermal resistance (stability) - thermal limit
MPL 30x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
OK |
| 40 °C | -2.2% |
8.69 kg / 19.17 pounds
8694.4 g / 85.3 N
|
OK |
| 60 °C | -4.4% |
8.50 kg / 18.74 pounds
8498.8 g / 83.4 N
|
|
| 80 °C | -6.6% |
8.30 kg / 18.31 pounds
8303.3 g / 81.5 N
|
|
| 100 °C | -28.8% |
6.33 kg / 13.95 pounds
6329.7 g / 62.1 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 30x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
20.06 kg / 44.23 pounds
4 689 Gs
|
3.01 kg / 6.63 pounds
3010 g / 29.5 N
|
N/A |
| 1 mm |
17.63 kg / 38.86 pounds
6 174 Gs
|
2.64 kg / 5.83 pounds
2644 g / 25.9 N
|
15.86 kg / 34.98 pounds
~0 Gs
|
| 2 mm |
15.19 kg / 33.49 pounds
5 732 Gs
|
2.28 kg / 5.02 pounds
2279 g / 22.4 N
|
13.67 kg / 30.14 pounds
~0 Gs
|
| 3 mm |
12.92 kg / 28.47 pounds
5 285 Gs
|
1.94 kg / 4.27 pounds
1937 g / 19.0 N
|
11.62 kg / 25.63 pounds
~0 Gs
|
| 5 mm |
9.08 kg / 20.03 pounds
4 432 Gs
|
1.36 kg / 3.00 pounds
1363 g / 13.4 N
|
8.18 kg / 18.02 pounds
~0 Gs
|
| 10 mm |
3.61 kg / 7.96 pounds
2 795 Gs
|
0.54 kg / 1.19 pounds
542 g / 5.3 N
|
3.25 kg / 7.17 pounds
~0 Gs
|
| 20 mm |
0.70 kg / 1.54 pounds
1 230 Gs
|
0.10 kg / 0.23 pounds
105 g / 1.0 N
|
0.63 kg / 1.39 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.05 pounds
217 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 pounds
141 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
96 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
68 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
50 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
38 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
MPL 30x10x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 5.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 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) | 1.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MPL 30x10x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.96 km/h
(8.04 m/s)
|
0.36 J | |
| 30 mm |
49.12 km/h
(13.64 m/s)
|
1.05 J | |
| 50 mm |
63.39 km/h
(17.61 m/s)
|
1.74 J | |
| 100 mm |
89.65 km/h
(24.90 m/s)
|
3.49 J |
Table 9: Corrosion resistance
MPL 30x10x5 / 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 30x10x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 9 370 Mx | 93.7 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Submerged application
MPL 30x10x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 8.89 kg | Standard |
| Water (riverbed) |
10.18 kg
(+1.29 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) significantly weakens the holding force.
3. Heat tolerance
*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) = 0.35
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.
Chemical composition
| 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 proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- Their magnetic field is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
- Neodymium magnets are highly resistant to magnetic field loss caused by magnetic disturbances,
- In other words, due to the smooth surface of silver, the element becomes visually attractive,
- Magnetic induction on the top side of the magnet remains strong,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to freedom in constructing and the ability to modify to complex applications,
- Huge importance in electronics industry – they serve a role in data components, brushless drives, advanced medical instruments, as well as complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems
Weaknesses
- At strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in producing threads and complex shapes in magnets, we propose using cover - magnetic mount.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these products can be problematic in diagnostics medical in case of swallowing.
- Due to expensive raw materials, their price is relatively high,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- using a sheet made of mild steel, acting as a magnetic yoke
- possessing a thickness of min. 10 mm to ensure full flux closure
- characterized by even structure
- without the slightest air gap between the magnet and steel
- under axial application of breakaway force (90-degree angle)
- in temp. approx. 20°C
Determinants of practical lifting force of a magnet
- Air gap (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Plate material – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
- Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.
Safety rules for work with neodymium magnets
Cards and drives
Device Safety: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).
Flammability
Machining of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Avoid contact if allergic
Some people experience a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to an allergic reaction. It is best to wear protective gloves.
Handling guide
Use magnets consciously. Their powerful strength can surprise even professionals. Stay alert and do not underestimate their power.
No play value
Strictly store magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.
Phone sensors
Note: rare earth magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, device, and navigation systems.
Crushing force
Protect your hands. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Heat sensitivity
Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.
Danger to pacemakers
Warning for patients: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.
Beware of splinters
Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
