MPL 30x10x8 / N38 - lamellar magnet
lamellar magnet
Catalog no 020139
GTIN/EAN: 5906301811459
length
30 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
18 g
Magnetization Direction
↑ axial
Load capacity
12.13 kg / 119.04 N
Magnetic Induction
427.56 mT / 4276 Gs
Coating
[NiCuNi] Nickel
10.71 ZŁ with VAT / pcs + price for transport
8.71 ZŁ net + 23% VAT / pcs
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Technical of the product - MPL 30x10x8 / N38 - lamellar magnet
Specification / characteristics - MPL 30x10x8 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020139 |
| GTIN/EAN | 5906301811459 |
| 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 | 8 mm [±0,1 mm] |
| Weight | 18 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 12.13 kg / 119.04 N |
| Magnetic Induction ~ ? | 427.56 mT / 4276 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 simulation of the product - technical parameters
These data represent the result of a mathematical simulation. Results were calculated on models for the material Nd2Fe14B. Real-world performance may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs distance) - characteristics
MPL 30x10x8 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4273 Gs
427.3 mT
|
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
|
critical level |
| 1 mm |
3683 Gs
368.3 mT
|
9.01 kg / 19.86 pounds
9009.7 g / 88.4 N
|
strong |
| 2 mm |
3109 Gs
310.9 mT
|
6.42 kg / 14.15 pounds
6419.9 g / 63.0 N
|
strong |
| 3 mm |
2600 Gs
260.0 mT
|
4.49 kg / 9.90 pounds
4488.7 g / 44.0 N
|
strong |
| 5 mm |
1818 Gs
181.8 mT
|
2.20 kg / 4.84 pounds
2195.3 g / 21.5 N
|
strong |
| 10 mm |
825 Gs
82.5 mT
|
0.45 kg / 1.00 pounds
452.4 g / 4.4 N
|
safe |
| 15 mm |
431 Gs
43.1 mT
|
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
|
safe |
| 20 mm |
248 Gs
24.8 mT
|
0.04 kg / 0.09 pounds
41.0 g / 0.4 N
|
safe |
| 30 mm |
101 Gs
10.1 mT
|
0.01 kg / 0.02 pounds
6.8 g / 0.1 N
|
safe |
| 50 mm |
28 Gs
2.8 mT
|
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
|
safe |
Table 2: Sliding load (vertical surface)
MPL 30x10x8 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.43 kg / 5.35 pounds
2426.0 g / 23.8 N
|
| 1 mm | Stal (~0.2) |
1.80 kg / 3.97 pounds
1802.0 g / 17.7 N
|
| 2 mm | Stal (~0.2) |
1.28 kg / 2.83 pounds
1284.0 g / 12.6 N
|
| 3 mm | Stal (~0.2) |
0.90 kg / 1.98 pounds
898.0 g / 8.8 N
|
| 5 mm | Stal (~0.2) |
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 10 mm | Stal (~0.2) |
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
24.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
8.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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) - vertical pull
MPL 30x10x8 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
3.64 kg / 8.02 pounds
3639.0 g / 35.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.43 kg / 5.35 pounds
2426.0 g / 23.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.21 kg / 2.67 pounds
1213.0 g / 11.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
6.07 kg / 13.37 pounds
6065.0 g / 59.5 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 30x10x8 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.61 kg / 1.34 pounds
606.5 g / 5.9 N
|
| 1 mm |
|
1.52 kg / 3.34 pounds
1516.3 g / 14.9 N
|
| 2 mm |
|
3.03 kg / 6.69 pounds
3032.5 g / 29.7 N
|
| 3 mm |
|
4.55 kg / 10.03 pounds
4548.8 g / 44.6 N
|
| 5 mm |
|
7.58 kg / 16.71 pounds
7581.3 g / 74.4 N
|
| 10 mm |
|
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
|
| 11 mm |
|
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
|
| 12 mm |
|
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 30x10x8 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
12.13 kg / 26.74 pounds
12130.0 g / 119.0 N
|
OK |
| 40 °C | -2.2% |
11.86 kg / 26.15 pounds
11863.1 g / 116.4 N
|
OK |
| 60 °C | -4.4% |
11.60 kg / 25.57 pounds
11596.3 g / 113.8 N
|
|
| 80 °C | -6.6% |
11.33 kg / 24.98 pounds
11329.4 g / 111.1 N
|
|
| 100 °C | -28.8% |
8.64 kg / 19.04 pounds
8636.6 g / 84.7 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 30x10x8 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
33.78 kg / 74.46 pounds
5 382 Gs
|
5.07 kg / 11.17 pounds
5066 g / 49.7 N
|
N/A |
| 1 mm |
29.33 kg / 64.66 pounds
7 964 Gs
|
4.40 kg / 9.70 pounds
4399 g / 43.2 N
|
26.39 kg / 58.19 pounds
~0 Gs
|
| 2 mm |
25.09 kg / 55.31 pounds
7 366 Gs
|
3.76 kg / 8.30 pounds
3763 g / 36.9 N
|
22.58 kg / 49.78 pounds
~0 Gs
|
| 3 mm |
21.25 kg / 46.85 pounds
6 780 Gs
|
3.19 kg / 7.03 pounds
3188 g / 31.3 N
|
19.13 kg / 42.17 pounds
~0 Gs
|
| 5 mm |
14.97 kg / 32.99 pounds
5 689 Gs
|
2.24 kg / 4.95 pounds
2245 g / 22.0 N
|
13.47 kg / 29.70 pounds
~0 Gs
|
| 10 mm |
6.11 kg / 13.48 pounds
3 636 Gs
|
0.92 kg / 2.02 pounds
917 g / 9.0 N
|
5.50 kg / 12.13 pounds
~0 Gs
|
| 20 mm |
1.26 kg / 2.78 pounds
1 651 Gs
|
0.19 kg / 0.42 pounds
189 g / 1.9 N
|
1.13 kg / 2.50 pounds
~0 Gs
|
| 50 mm |
0.04 kg / 0.10 pounds
308 Gs
|
0.01 kg / 0.01 pounds
7 g / 0.1 N
|
0.04 kg / 0.09 pounds
~0 Gs
|
| 60 mm |
0.02 kg / 0.04 pounds
203 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 70 mm |
0.01 kg / 0.02 pounds
140 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 / 0.01 pounds
100 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 pounds
74 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
56 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MPL 30x10x8 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 6.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Car key | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (cracking risk) - warning
MPL 30x10x8 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.78 km/h
(7.44 m/s)
|
0.50 J | |
| 30 mm |
45.36 km/h
(12.60 m/s)
|
1.43 J | |
| 50 mm |
58.54 km/h
(16.26 m/s)
|
2.38 J | |
| 100 mm |
82.79 km/h
(23.00 m/s)
|
4.76 J |
Table 9: Coating parameters (durability)
MPL 30x10x8 / 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 30x10x8 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 12 138 Mx | 121.4 µWb |
| Pc Coefficient | 0.51 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 30x10x8 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 12.13 kg | Standard |
| Water (riverbed) |
13.89 kg
(+1.76 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Heat tolerance
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.51
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.
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 |
Other deals
Pros as well as cons of neodymium magnets.
Strengths
- They do not lose magnetism, even during around 10 years – the decrease in power is only ~1% (theoretically),
- They are extremely resistant to demagnetization induced by external field influence,
- By using a shiny layer of nickel, the element gains an elegant look,
- Magnets possess huge magnetic induction on the outer side,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
- Thanks to modularity in shaping and the ability to modify to unusual requirements,
- Versatile presence in modern technologies – they are commonly used in HDD drives, motor assemblies, medical devices, as well as technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions
Disadvantages
- At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets lose their power 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
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- Limited possibility of making nuts in the magnet and complex forms - preferred is a housing - mounting mechanism.
- Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
- with a cross-section of at least 10 mm
- with a plane perfectly flat
- without the slightest insulating layer between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- in temp. approx. 20°C
Key elements affecting lifting force
- Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Angle of force application – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped into the air.
- Steel type – mild steel gives the best results. Higher carbon content lower magnetic permeability and holding force.
- Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Safety rules for work with neodymium magnets
Flammability
Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.
Physical harm
Big blocks can smash fingers instantly. Never put your hand betwixt two attracting surfaces.
Operating temperature
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
Threat to navigation
Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.
Cards and drives
Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Skin irritation risks
Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, prevent direct skin contact or opt for encased magnets.
Handling rules
Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can react.
Implant safety
Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.
No play value
Product intended for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.
Eye protection
Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
