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 / 20.69 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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Physical properties - 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 / 20.69 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 magnet - data
The following values represent the direct effect of a mathematical calculation. Results rely on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs distance) - interaction chart
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
|
warning |
| 1 mm |
1098 Gs
109.8 mT
|
1.92 kg / 4.23 pounds
1920.5 g / 18.8 N
|
safe |
| 2 mm |
1019 Gs
101.9 mT
|
1.65 kg / 3.65 pounds
1654.9 g / 16.2 N
|
safe |
| 3 mm |
926 Gs
92.6 mT
|
1.37 kg / 3.01 pounds
1365.9 g / 13.4 N
|
safe |
| 5 mm |
733 Gs
73.3 mT
|
0.86 kg / 1.89 pounds
855.2 g / 8.4 N
|
safe |
| 10 mm |
379 Gs
37.9 mT
|
0.23 kg / 0.50 pounds
228.8 g / 2.2 N
|
safe |
| 15 mm |
203 Gs
20.3 mT
|
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
|
safe |
| 20 mm |
116 Gs
11.6 mT
|
0.02 kg / 0.05 pounds
21.6 g / 0.2 N
|
safe |
| 30 mm |
46 Gs
4.6 mT
|
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
|
safe |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
safe |
Table 2: Vertical load (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) - vertical pull
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 (saturation) - 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) - resistance threshold
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) - forces in the system
MPL 30x15x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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 (electronics) - precautionary measures
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 |
| Mechanical watch | 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: Dynamics (kinetic energy) - warning
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: Corrosion resistance
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. Wall mount (shear)
*Caution: On a vertical surface, the magnet retains only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*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) = 0.13
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.
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 |
View also products
Strengths and weaknesses of neodymium magnets.
Pros
- They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
- They retain their magnetic properties even under strong external field,
- The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- In view of the option of flexible forming and adaptation to custom needs, magnetic components can be modeled in a variety of shapes and sizes, which expands the range of possible applications,
- Versatile presence in future technologies – they serve a role in hard drives, electromotive mechanisms, medical equipment, also modern systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Weaknesses
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, tiny parts of these devices can complicate diagnosis medical after entering the body.
- With budget limitations the cost of neodymium magnets is a challenge,
Lifting parameters
Best holding force of the magnet in ideal parameters – what contributes to it?
- using a sheet made of high-permeability steel, functioning as a circuit closing element
- with a thickness minimum 10 mm
- with an polished touching surface
- under conditions of ideal adhesion (metal-to-metal)
- under perpendicular force vector (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical aspects of lifting capacity – factors
- Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be lost into the air.
- Plate material – mild steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
- Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.
H&S for magnets
Magnets are brittle
Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Maximum temperature
Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Electronic hazard
Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).
Do not underestimate power
Handle with care. Neodymium magnets attract from a long distance and snap with huge force, often quicker than you can react.
This is not a toy
NdFeB magnets are not intended for children. Swallowing a few magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.
Keep away from electronics
Navigation devices and mobile phones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Crushing risk
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.
Machining danger
Drilling and cutting of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Health Danger
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Nickel coating and allergies
A percentage of the population have a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in a rash. We strongly advise use protective gloves.
