MPL 30x15x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020389
GTIN/EAN: 5906301811886
length
30 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
33.75 g
Magnetization Direction
↑ axial
Load capacity
16.84 kg / 165.22 N
Magnetic Induction
413.45 mT / 4135 Gs
Coating
[NiCuNi] Nickel
24.48 ZŁ with VAT / pcs + price for transport
19.90 ZŁ net + 23% VAT / pcs
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Technical - MPL 30x15x10 / N38 - lamellar magnet
Specification / characteristics - MPL 30x15x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020389 |
| GTIN/EAN | 5906301811886 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 33.75 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 16.84 kg / 165.22 N |
| Magnetic Induction ~ ? | 413.45 mT / 4135 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 - report
These values constitute the direct effect of a engineering calculation. Results are based on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these data as a supplementary guide when designing systems.
Table 1: Static force (pull vs distance) - power drop
MPL 30x15x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4133 Gs
413.3 mT
|
16.84 kg / 37.13 lbs
16840.0 g / 165.2 N
|
critical level |
| 1 mm |
3754 Gs
375.4 mT
|
13.89 kg / 30.62 lbs
13889.5 g / 136.3 N
|
critical level |
| 2 mm |
3365 Gs
336.5 mT
|
11.16 kg / 24.60 lbs
11159.2 g / 109.5 N
|
critical level |
| 3 mm |
2988 Gs
298.8 mT
|
8.80 kg / 19.41 lbs
8803.6 g / 86.4 N
|
strong |
| 5 mm |
2321 Gs
232.1 mT
|
5.31 kg / 11.71 lbs
5309.9 g / 52.1 N
|
strong |
| 10 mm |
1225 Gs
122.5 mT
|
1.48 kg / 3.26 lbs
1480.1 g / 14.5 N
|
low risk |
| 15 mm |
684 Gs
68.4 mT
|
0.46 kg / 1.02 lbs
461.6 g / 4.5 N
|
low risk |
| 20 mm |
409 Gs
40.9 mT
|
0.16 kg / 0.36 lbs
164.8 g / 1.6 N
|
low risk |
| 30 mm |
173 Gs
17.3 mT
|
0.03 kg / 0.07 lbs
29.6 g / 0.3 N
|
low risk |
| 50 mm |
50 Gs
5.0 mT
|
0.00 kg / 0.01 lbs
2.4 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (wall)
MPL 30x15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
3.37 kg / 7.43 lbs
3368.0 g / 33.0 N
|
| 1 mm | Stal (~0.2) |
2.78 kg / 6.12 lbs
2778.0 g / 27.3 N
|
| 2 mm | Stal (~0.2) |
2.23 kg / 4.92 lbs
2232.0 g / 21.9 N
|
| 3 mm | Stal (~0.2) |
1.76 kg / 3.88 lbs
1760.0 g / 17.3 N
|
| 5 mm | Stal (~0.2) |
1.06 kg / 2.34 lbs
1062.0 g / 10.4 N
|
| 10 mm | Stal (~0.2) |
0.30 kg / 0.65 lbs
296.0 g / 2.9 N
|
| 15 mm | Stal (~0.2) |
0.09 kg / 0.20 lbs
92.0 g / 0.9 N
|
| 20 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
|
| 30 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MPL 30x15x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
5.05 kg / 11.14 lbs
5052.0 g / 49.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
3.37 kg / 7.43 lbs
3368.0 g / 33.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.68 kg / 3.71 lbs
1684.0 g / 16.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
8.42 kg / 18.56 lbs
8420.0 g / 82.6 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 30x15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.84 kg / 1.86 lbs
842.0 g / 8.3 N
|
| 1 mm |
|
2.11 kg / 4.64 lbs
2105.0 g / 20.7 N
|
| 2 mm |
|
4.21 kg / 9.28 lbs
4210.0 g / 41.3 N
|
| 3 mm |
|
6.31 kg / 13.92 lbs
6315.0 g / 62.0 N
|
| 5 mm |
|
10.53 kg / 23.20 lbs
10525.0 g / 103.3 N
|
| 10 mm |
|
16.84 kg / 37.13 lbs
16840.0 g / 165.2 N
|
| 11 mm |
|
16.84 kg / 37.13 lbs
16840.0 g / 165.2 N
|
| 12 mm |
|
16.84 kg / 37.13 lbs
16840.0 g / 165.2 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MPL 30x15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
16.84 kg / 37.13 lbs
16840.0 g / 165.2 N
|
OK |
| 40 °C | -2.2% |
16.47 kg / 36.31 lbs
16469.5 g / 161.6 N
|
OK |
| 60 °C | -4.4% |
16.10 kg / 35.49 lbs
16099.0 g / 157.9 N
|
|
| 80 °C | -6.6% |
15.73 kg / 34.68 lbs
15728.6 g / 154.3 N
|
|
| 100 °C | -28.8% |
11.99 kg / 26.43 lbs
11990.1 g / 117.6 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 30x15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
47.39 kg / 104.48 lbs
5 357 Gs
|
7.11 kg / 15.67 lbs
7109 g / 69.7 N
|
N/A |
| 1 mm |
43.23 kg / 95.30 lbs
7 895 Gs
|
6.48 kg / 14.29 lbs
6484 g / 63.6 N
|
38.90 kg / 85.77 lbs
~0 Gs
|
| 2 mm |
39.09 kg / 86.17 lbs
7 507 Gs
|
5.86 kg / 12.93 lbs
5863 g / 57.5 N
|
35.18 kg / 77.56 lbs
~0 Gs
|
| 3 mm |
35.13 kg / 77.45 lbs
7 117 Gs
|
5.27 kg / 11.62 lbs
5270 g / 51.7 N
|
31.62 kg / 69.70 lbs
~0 Gs
|
| 5 mm |
27.95 kg / 61.61 lbs
6 348 Gs
|
4.19 kg / 9.24 lbs
4192 g / 41.1 N
|
25.15 kg / 55.45 lbs
~0 Gs
|
| 10 mm |
14.94 kg / 32.94 lbs
4 642 Gs
|
2.24 kg / 4.94 lbs
2242 g / 22.0 N
|
13.45 kg / 29.65 lbs
~0 Gs
|
| 20 mm |
4.17 kg / 9.18 lbs
2 451 Gs
|
0.62 kg / 1.38 lbs
625 g / 6.1 N
|
3.75 kg / 8.26 lbs
~0 Gs
|
| 50 mm |
0.19 kg / 0.41 lbs
519 Gs
|
0.03 kg / 0.06 lbs
28 g / 0.3 N
|
0.17 kg / 0.37 lbs
~0 Gs
|
| 60 mm |
0.08 kg / 0.18 lbs
347 Gs
|
0.01 kg / 0.03 lbs
13 g / 0.1 N
|
0.08 kg / 0.17 lbs
~0 Gs
|
| 70 mm |
0.04 kg / 0.09 lbs
242 Gs
|
0.01 kg / 0.01 lbs
6 g / 0.1 N
|
0.04 kg / 0.08 lbs
~0 Gs
|
| 80 mm |
0.02 kg / 0.05 lbs
175 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.04 lbs
~0 Gs
|
| 90 mm |
0.01 kg / 0.03 lbs
130 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.02 lbs
~0 Gs
|
| 100 mm |
0.01 kg / 0.02 lbs
99 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (electronics) - warnings
MPL 30x15x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 12.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Car key | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x15x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.73 km/h
(6.59 m/s)
|
0.73 J | |
| 30 mm |
39.06 km/h
(10.85 m/s)
|
1.99 J | |
| 50 mm |
50.38 km/h
(13.99 m/s)
|
3.30 J | |
| 100 mm |
71.24 km/h
(19.79 m/s)
|
6.61 J |
Table 9: Coating parameters (durability)
MPL 30x15x10 / 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 30x15x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 18 390 Mx | 183.9 µWb |
| Pc Coefficient | 0.52 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 30x15x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 16.84 kg | Standard |
| Water (riverbed) |
19.28 kg
(+2.44 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical surface, the magnet holds merely a fraction of its max power.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Thermal stability
*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) = 0.52
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.
Elemental analysis
| 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 |
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Pros as well as cons of neodymium magnets.
Benefits
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
- Neodymium magnets prove to be highly resistant to magnetic field loss caused by external field sources,
- The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
- The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to modularity in constructing and the capacity to customize to client solutions,
- Universal use in high-tech industry – they are used in computer drives, drive modules, diagnostic systems, also complex engineering applications.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose their force 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 durability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic holder.
- Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
- with a cross-section minimum 10 mm
- with an ground touching surface
- without the slightest insulating layer between the magnet and steel
- under perpendicular application of breakaway force (90-degree angle)
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Direction of force – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface finish – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
- Temperature influence – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.
Warnings
Life threat
For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Keep away from children
Adult use only. Small elements pose a choking risk, causing serious injuries. Keep away from kids and pets.
Immense force
Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Electronic devices
Avoid bringing magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.
Bodily injuries
Mind your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing anything in their path. Be careful!
Skin irritation risks
Studies show that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact and opt for coated magnets.
Heat warning
Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Fragile material
Neodymium magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets will cause them cracking into small pieces.
Keep away from electronics
GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.
Mechanical processing
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.
