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
bulk discounts:
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Technical details - 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 modeling of the assembly - report
The following data represent the result of a physical calculation. Results are based on models for the material Nd2Fe14B. Real-world conditions may differ. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static 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 LBS
8890.0 g / 87.2 N
|
warning |
| 1 mm |
2866 Gs
286.6 mT
|
6.73 kg / 14.84 LBS
6731.1 g / 66.0 N
|
warning |
| 2 mm |
2424 Gs
242.4 mT
|
4.82 kg / 10.62 LBS
4816.4 g / 47.2 N
|
warning |
| 3 mm |
2022 Gs
202.2 mT
|
3.35 kg / 7.38 LBS
3349.6 g / 32.9 N
|
warning |
| 5 mm |
1397 Gs
139.7 mT
|
1.60 kg / 3.53 LBS
1600.3 g / 15.7 N
|
low risk |
| 10 mm |
615 Gs
61.5 mT
|
0.31 kg / 0.68 LBS
309.8 g / 3.0 N
|
low risk |
| 15 mm |
314 Gs
31.4 mT
|
0.08 kg / 0.18 LBS
80.6 g / 0.8 N
|
low risk |
| 20 mm |
177 Gs
17.7 mT
|
0.03 kg / 0.06 LBS
25.8 g / 0.3 N
|
low risk |
| 30 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.01 LBS
4.1 g / 0.0 N
|
low risk |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
low risk |
Table 2: Slippage hold (wall)
MPL 30x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.78 kg / 3.92 LBS
1778.0 g / 17.4 N
|
| 1 mm | Stal (~0.2) |
1.35 kg / 2.97 LBS
1346.0 g / 13.2 N
|
| 2 mm | Stal (~0.2) |
0.96 kg / 2.13 LBS
964.0 g / 9.5 N
|
| 3 mm | Stal (~0.2) |
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
|
| 5 mm | Stal (~0.2) |
0.32 kg / 0.71 LBS
320.0 g / 3.1 N
|
| 10 mm | Stal (~0.2) |
0.06 kg / 0.14 LBS
62.0 g / 0.6 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
16.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 LBS
2667.0 g / 26.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.78 kg / 3.92 LBS
1778.0 g / 17.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.89 kg / 1.96 LBS
889.0 g / 8.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.45 kg / 9.80 LBS
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 LBS
889.0 g / 8.7 N
|
| 1 mm |
|
2.22 kg / 4.90 LBS
2222.5 g / 21.8 N
|
| 2 mm |
|
4.45 kg / 9.80 LBS
4445.0 g / 43.6 N
|
| 3 mm |
|
6.67 kg / 14.70 LBS
6667.5 g / 65.4 N
|
| 5 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 10 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 11 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 12 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 30x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
OK |
| 40 °C | -2.2% |
8.69 kg / 19.17 LBS
8694.4 g / 85.3 N
|
OK |
| 60 °C | -4.4% |
8.50 kg / 18.74 LBS
8498.8 g / 83.4 N
|
|
| 80 °C | -6.6% |
8.30 kg / 18.31 LBS
8303.3 g / 81.5 N
|
|
| 100 °C | -28.8% |
6.33 kg / 13.95 LBS
6329.7 g / 62.1 N
|
Table 6: Two magnets (repulsion) - field range
MPL 30x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
20.06 kg / 44.23 LBS
4 689 Gs
|
3.01 kg / 6.63 LBS
3010 g / 29.5 N
|
N/A |
| 1 mm |
17.63 kg / 38.86 LBS
6 174 Gs
|
2.64 kg / 5.83 LBS
2644 g / 25.9 N
|
15.86 kg / 34.98 LBS
~0 Gs
|
| 2 mm |
15.19 kg / 33.49 LBS
5 732 Gs
|
2.28 kg / 5.02 LBS
2279 g / 22.4 N
|
13.67 kg / 30.14 LBS
~0 Gs
|
| 3 mm |
12.92 kg / 28.47 LBS
5 285 Gs
|
1.94 kg / 4.27 LBS
1937 g / 19.0 N
|
11.62 kg / 25.63 LBS
~0 Gs
|
| 5 mm |
9.08 kg / 20.03 LBS
4 432 Gs
|
1.36 kg / 3.00 LBS
1363 g / 13.4 N
|
8.18 kg / 18.02 LBS
~0 Gs
|
| 10 mm |
3.61 kg / 7.96 LBS
2 795 Gs
|
0.54 kg / 1.19 LBS
542 g / 5.3 N
|
3.25 kg / 7.17 LBS
~0 Gs
|
| 20 mm |
0.70 kg / 1.54 LBS
1 230 Gs
|
0.10 kg / 0.23 LBS
105 g / 1.0 N
|
0.63 kg / 1.39 LBS
~0 Gs
|
| 50 mm |
0.02 kg / 0.05 LBS
217 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 LBS
141 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 LBS
96 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
68 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
50 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
38 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - 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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Car key | 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: Dynamics (cracking risk) - 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: Coating parameters (durability)
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: Construction 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: Underwater work (magnet fishing)
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. Wall mount (shear)
*Note: On a vertical wall, the magnet retains only a fraction of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Heat tolerance
*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) = 0.35
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.
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 |
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Advantages and disadvantages of rare earth magnets.
Benefits
- They retain full power for nearly 10 years – the loss is just ~1% (according to analyses),
- Neodymium magnets are highly resistant to loss of magnetic properties caused by magnetic disturbances,
- A magnet with a shiny silver surface has better aesthetics,
- The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Possibility of custom modeling and adapting to complex conditions,
- Wide application in advanced technology sectors – they are commonly used in mass storage devices, electric motors, medical equipment, also modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complex forms in magnets, we propose using casing - magnetic mount.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Pull force analysis
Highest magnetic holding force – what it depends on?
- with the use of a sheet made of low-carbon steel, ensuring maximum field concentration
- with a thickness minimum 10 mm
- with a surface cleaned and smooth
- under conditions of gap-free contact (surface-to-surface)
- under vertical force direction (90-degree angle)
- in temp. approx. 20°C
Practical aspects of lifting capacity – factors
- Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
- Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Thermal environment – heating the magnet results in weakening 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, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the load capacity.
Safe handling of NdFeB magnets
Life threat
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Permanent damage
Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Keep away from computers
Equipment safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).
Beware of splinters
Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.
Choking Hazard
Neodymium magnets are not intended for children. Swallowing several magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates immediate surgery.
Fire warning
Powder generated during grinding of magnets is flammable. Do not drill into magnets unless you are an expert.
Sensitization to coating
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease handling magnets and wear gloves.
Precision electronics
Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.
Crushing risk
Protect your hands. Two powerful magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!
Respect the power
Handle magnets with awareness. Their immense force can shock even experienced users. Plan your moves and respect their power.
