MPL 30x15x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020140
GTIN/EAN: 5906301811466
length
30 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
6.75 g
Magnetization Direction
↑ axial
Load capacity
2.11 kg / 20.74 N
Magnetic Induction
115.11 mT / 1151 Gs
Coating
[NiCuNi] Nickel
3.89 ZŁ with VAT / pcs + price for transport
3.16 ZŁ net + 23% VAT / pcs
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Detailed specification - MPL 30x15x2 / N38 - lamellar magnet
Specification / characteristics - MPL 30x15x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020140 |
| GTIN/EAN | 5906301811466 |
| 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 | 2 mm [±0,1 mm] |
| Weight | 6.75 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.11 kg / 20.74 N |
| Magnetic Induction ~ ? | 115.11 mT / 1151 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 modeling of the product - data
Presented information constitute the outcome of a engineering simulation. Values are based on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ. Use these calculations as a preliminary roadmap when designing systems.
Table 1: Static force (force vs distance) - power drop
MPL 30x15x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1151 Gs
115.1 mT
|
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
medium risk |
| 1 mm |
1098 Gs
109.8 mT
|
1.92 kg / 4.23 pounds
1920.5 g / 18.8 N
|
weak grip |
| 2 mm |
1019 Gs
101.9 mT
|
1.65 kg / 3.65 pounds
1654.9 g / 16.2 N
|
weak grip |
| 3 mm |
926 Gs
92.6 mT
|
1.37 kg / 3.01 pounds
1365.9 g / 13.4 N
|
weak grip |
| 5 mm |
733 Gs
73.3 mT
|
0.86 kg / 1.89 pounds
855.2 g / 8.4 N
|
weak grip |
| 10 mm |
379 Gs
37.9 mT
|
0.23 kg / 0.50 pounds
228.8 g / 2.2 N
|
weak grip |
| 15 mm |
203 Gs
20.3 mT
|
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
|
weak grip |
| 20 mm |
116 Gs
11.6 mT
|
0.02 kg / 0.05 pounds
21.6 g / 0.2 N
|
weak grip |
| 30 mm |
46 Gs
4.6 mT
|
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
|
weak grip |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
weak grip |
Table 2: Slippage capacity (wall)
MPL 30x15x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.42 kg / 0.93 pounds
422.0 g / 4.1 N
|
| 1 mm | Stal (~0.2) |
0.38 kg / 0.85 pounds
384.0 g / 3.8 N
|
| 2 mm | Stal (~0.2) |
0.33 kg / 0.73 pounds
330.0 g / 3.2 N
|
| 3 mm | Stal (~0.2) |
0.27 kg / 0.60 pounds
274.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.17 kg / 0.38 pounds
172.0 g / 1.7 N
|
| 10 mm | Stal (~0.2) |
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 30x15x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.63 kg / 1.40 pounds
633.0 g / 6.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.42 kg / 0.93 pounds
422.0 g / 4.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.21 kg / 0.47 pounds
211.0 g / 2.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 30x15x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.21 kg / 0.47 pounds
211.0 g / 2.1 N
|
| 1 mm |
|
0.53 kg / 1.16 pounds
527.5 g / 5.2 N
|
| 2 mm |
|
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N
|
| 3 mm |
|
1.58 kg / 3.49 pounds
1582.5 g / 15.5 N
|
| 5 mm |
|
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
| 10 mm |
|
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
| 11 mm |
|
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
| 12 mm |
|
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 30x15x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
|
OK |
| 40 °C | -2.2% |
2.06 kg / 4.55 pounds
2063.6 g / 20.2 N
|
OK |
| 60 °C | -4.4% |
2.02 kg / 4.45 pounds
2017.2 g / 19.8 N
|
|
| 80 °C | -6.6% |
1.97 kg / 4.34 pounds
1970.7 g / 19.3 N
|
|
| 100 °C | -28.8% |
1.50 kg / 3.31 pounds
1502.3 g / 14.7 N
|
Table 6: Two magnets (attraction) - field range
MPL 30x15x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.67 kg / 8.10 pounds
2 169 Gs
|
0.55 kg / 1.22 pounds
551 g / 5.4 N
|
N/A |
| 1 mm |
3.53 kg / 7.79 pounds
2 257 Gs
|
0.53 kg / 1.17 pounds
530 g / 5.2 N
|
3.18 kg / 7.01 pounds
~0 Gs
|
| 2 mm |
3.34 kg / 7.37 pounds
2 196 Gs
|
0.50 kg / 1.11 pounds
502 g / 4.9 N
|
3.01 kg / 6.64 pounds
~0 Gs
|
| 3 mm |
3.12 kg / 6.89 pounds
2 122 Gs
|
0.47 kg / 1.03 pounds
469 g / 4.6 N
|
2.81 kg / 6.20 pounds
~0 Gs
|
| 5 mm |
2.63 kg / 5.80 pounds
1 948 Gs
|
0.39 kg / 0.87 pounds
395 g / 3.9 N
|
2.37 kg / 5.22 pounds
~0 Gs
|
| 10 mm |
1.49 kg / 3.28 pounds
1 465 Gs
|
0.22 kg / 0.49 pounds
223 g / 2.2 N
|
1.34 kg / 2.96 pounds
~0 Gs
|
| 20 mm |
0.40 kg / 0.88 pounds
758 Gs
|
0.06 kg / 0.13 pounds
60 g / 0.6 N
|
0.36 kg / 0.79 pounds
~0 Gs
|
| 50 mm |
0.01 kg / 0.03 pounds
142 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.03 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 pounds
92 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
63 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
44 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
32 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
24 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 30x15x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MPL 30x15x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.00 km/h
(5.28 m/s)
|
0.09 J | |
| 30 mm |
30.91 km/h
(8.59 m/s)
|
0.25 J | |
| 50 mm |
39.87 km/h
(11.08 m/s)
|
0.41 J | |
| 100 mm |
56.39 km/h
(15.66 m/s)
|
0.83 J |
Table 9: Coating parameters (durability)
MPL 30x15x2 / 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 30x15x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 236 Mx | 62.4 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 30x15x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.11 kg | Standard |
| Water (riverbed) |
2.42 kg
(+0.31 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical wall, the magnet retains only a fraction of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Power loss vs temp
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Pros and cons of neodymium magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- Neodymium magnets remain remarkably resistant to demagnetization caused by external interference,
- Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver gives an professional appearance,
- They feature high magnetic induction at the operating surface, which increases their power,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
- Considering the possibility of precise molding and customization to unique needs, neodymium magnets can be modeled in a broad palette of shapes and sizes, which makes them more universal,
- Fundamental importance in modern industrial fields – they are commonly used in data components, motor assemblies, advanced medical instruments, and multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Magnetic strength at its maximum – what it depends on?
- using a sheet made of high-permeability steel, serving as a ideal flux conductor
- possessing a massiveness of min. 10 mm to avoid saturation
- characterized by lack of roughness
- under conditions of gap-free contact (metal-to-metal)
- during pulling in a direction perpendicular to the mounting surface
- at temperature approx. 20 degrees Celsius
What influences lifting capacity in practice
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
- Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.
Safe handling of NdFeB magnets
Warning for heart patients
Individuals with a pacemaker must maintain an safe separation from magnets. The magnetic field can stop the functioning of the implant.
Demagnetization risk
Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
Magnetic interference
An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.
Powerful field
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Dust is flammable
Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.
Crushing risk
Big blocks can break fingers instantly. Under no circumstances put your hand betwixt two strong magnets.
Swallowing risk
Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep away from children and animals.
Allergic reactions
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent direct skin contact and choose versions in plastic housing.
Cards and drives
Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Magnet fragility
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
