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
bulk discounts:
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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 |
Engineering analysis of the product - data
The following data constitute the direct effect of a engineering analysis. Results rely on algorithms for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Please consider these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - interaction chart
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
|
dangerous! |
| 1 mm |
3754 Gs
375.4 mT
|
13.89 kg / 30.62 LBS
13889.5 g / 136.3 N
|
dangerous! |
| 2 mm |
3365 Gs
336.5 mT
|
11.16 kg / 24.60 LBS
11159.2 g / 109.5 N
|
dangerous! |
| 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
|
weak grip |
| 15 mm |
684 Gs
68.4 mT
|
0.46 kg / 1.02 LBS
461.6 g / 4.5 N
|
weak grip |
| 20 mm |
409 Gs
40.9 mT
|
0.16 kg / 0.36 LBS
164.8 g / 1.6 N
|
weak grip |
| 30 mm |
173 Gs
17.3 mT
|
0.03 kg / 0.07 LBS
29.6 g / 0.3 N
|
weak grip |
| 50 mm |
50 Gs
5.0 mT
|
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
|
weak grip |
Table 2: Shear hold (vertical surface)
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: Vertical assembly (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 (saturation) - 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: Thermal resistance (material behavior) - power drop
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: Magnet-Magnet interaction (attraction) - forces in the system
MPL 30x15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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 (implants) - precautionary measures
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 (cracking risk) - warning
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: Corrosion resistance
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 (Pc)
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. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains merely a fraction of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) severely 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) = 0.52
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also products
Pros as well as cons of rare earth magnets.
Advantages
- They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
- Neodymium magnets are remarkably resistant to magnetic field loss caused by magnetic disturbances,
- A magnet with a metallic silver surface is more attractive,
- Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
- In view of the possibility of precise molding and customization to custom requirements, magnetic components can be created in a wide range of forms and dimensions, which expands the range of possible applications,
- Versatile presence in high-tech industry – they are utilized in hard drives, brushless drives, diagnostic systems, also multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- At very strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complex forms in magnets, we propose using cover - magnetic mechanism.
- Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these devices are able to disrupt the diagnostic process 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
Lifting parameters
Magnetic strength at its maximum – what affects it?
- using a base made of mild steel, serving as a magnetic yoke
- with a cross-section minimum 10 mm
- with a surface cleaned and smooth
- under conditions of gap-free contact (surface-to-surface)
- during detachment in a direction perpendicular to the plane
- at ambient temperature room level
Lifting capacity in real conditions – factors
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
- Plate material – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
- Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate lowers the holding force.
Safety rules for work with NdFeB magnets
Finger safety
Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Maximum temperature
Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.
Magnetic interference
Note: rare earth magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.
Sensitization to coating
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation appears, immediately stop handling magnets and wear gloves.
Protective goggles
Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.
Handling guide
Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Danger to pacemakers
Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Product not for children
Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep away from kids and pets.
Magnetic media
Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, timepieces).
Mechanical processing
Dust produced during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.
