MPL 15x15x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020120
GTIN/EAN: 5906301811268
length
15 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
8.44 g
Magnetization Direction
↑ axial
Load capacity
5.87 kg / 57.62 N
Magnetic Induction
318.00 mT / 3180 Gs
Coating
[NiCuNi] Nickel
4.03 ZŁ with VAT / pcs + price for transport
3.28 ZŁ net + 23% VAT / pcs
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Technical of the product - MPL 15x15x5 / N38 - lamellar magnet
Specification / characteristics - MPL 15x15x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020120 |
| GTIN/EAN | 5906301811268 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 8.44 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 5.87 kg / 57.62 N |
| Magnetic Induction ~ ? | 318.00 mT / 3180 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 simulation of the magnet - data
Presented data represent the result of a physical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world performance might slightly differ. Treat these calculations as a reference point for designers.
Table 1: Static force (pull vs gap) - characteristics
MPL 15x15x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3179 Gs
317.9 mT
|
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
strong |
| 1 mm |
2873 Gs
287.3 mT
|
4.79 kg / 10.57 LBS
4794.1 g / 47.0 N
|
strong |
| 2 mm |
2528 Gs
252.8 mT
|
3.71 kg / 8.18 LBS
3712.5 g / 36.4 N
|
strong |
| 3 mm |
2181 Gs
218.1 mT
|
2.76 kg / 6.09 LBS
2763.0 g / 27.1 N
|
strong |
| 5 mm |
1565 Gs
156.5 mT
|
1.42 kg / 3.14 LBS
1422.0 g / 13.9 N
|
low risk |
| 10 mm |
659 Gs
65.9 mT
|
0.25 kg / 0.56 LBS
252.1 g / 2.5 N
|
low risk |
| 15 mm |
307 Gs
30.7 mT
|
0.05 kg / 0.12 LBS
54.7 g / 0.5 N
|
low risk |
| 20 mm |
162 Gs
16.2 mT
|
0.02 kg / 0.03 LBS
15.2 g / 0.1 N
|
low risk |
| 30 mm |
59 Gs
5.9 mT
|
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
low risk |
| 50 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (wall)
MPL 15x15x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.17 kg / 2.59 LBS
1174.0 g / 11.5 N
|
| 1 mm | Stal (~0.2) |
0.96 kg / 2.11 LBS
958.0 g / 9.4 N
|
| 2 mm | Stal (~0.2) |
0.74 kg / 1.64 LBS
742.0 g / 7.3 N
|
| 3 mm | Stal (~0.2) |
0.55 kg / 1.22 LBS
552.0 g / 5.4 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.63 LBS
284.0 g / 2.8 N
|
| 10 mm | Stal (~0.2) |
0.05 kg / 0.11 LBS
50.0 g / 0.5 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 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 15x15x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.76 kg / 3.88 LBS
1761.0 g / 17.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.17 kg / 2.59 LBS
1174.0 g / 11.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.59 kg / 1.29 LBS
587.0 g / 5.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.94 kg / 6.47 LBS
2935.0 g / 28.8 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 15x15x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.59 kg / 1.29 LBS
587.0 g / 5.8 N
|
| 1 mm |
|
1.47 kg / 3.24 LBS
1467.5 g / 14.4 N
|
| 2 mm |
|
2.94 kg / 6.47 LBS
2935.0 g / 28.8 N
|
| 3 mm |
|
4.40 kg / 9.71 LBS
4402.5 g / 43.2 N
|
| 5 mm |
|
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
| 10 mm |
|
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
| 11 mm |
|
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
| 12 mm |
|
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 15x15x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.87 kg / 12.94 LBS
5870.0 g / 57.6 N
|
OK |
| 40 °C | -2.2% |
5.74 kg / 12.66 LBS
5740.9 g / 56.3 N
|
OK |
| 60 °C | -4.4% |
5.61 kg / 12.37 LBS
5611.7 g / 55.1 N
|
|
| 80 °C | -6.6% |
5.48 kg / 12.09 LBS
5482.6 g / 53.8 N
|
|
| 100 °C | -28.8% |
4.18 kg / 9.21 LBS
4179.4 g / 41.0 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 15x15x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
14.02 kg / 30.90 LBS
4 741 Gs
|
2.10 kg / 4.64 LBS
2103 g / 20.6 N
|
N/A |
| 1 mm |
12.77 kg / 28.15 LBS
6 068 Gs
|
1.92 kg / 4.22 LBS
1916 g / 18.8 N
|
11.49 kg / 25.34 LBS
~0 Gs
|
| 2 mm |
11.45 kg / 25.24 LBS
5 746 Gs
|
1.72 kg / 3.79 LBS
1717 g / 16.8 N
|
10.30 kg / 22.72 LBS
~0 Gs
|
| 3 mm |
10.13 kg / 22.34 LBS
5 405 Gs
|
1.52 kg / 3.35 LBS
1520 g / 14.9 N
|
9.12 kg / 20.10 LBS
~0 Gs
|
| 5 mm |
7.68 kg / 16.93 LBS
4 706 Gs
|
1.15 kg / 2.54 LBS
1152 g / 11.3 N
|
6.91 kg / 15.24 LBS
~0 Gs
|
| 10 mm |
3.40 kg / 7.49 LBS
3 129 Gs
|
0.51 kg / 1.12 LBS
509 g / 5.0 N
|
3.06 kg / 6.74 LBS
~0 Gs
|
| 20 mm |
0.60 kg / 1.33 LBS
1 318 Gs
|
0.09 kg / 0.20 LBS
90 g / 0.9 N
|
0.54 kg / 1.19 LBS
~0 Gs
|
| 50 mm |
0.01 kg / 0.03 LBS
188 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.02 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 LBS
118 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 / 0.00 LBS
79 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
55 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
40 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
30 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MPL 15x15x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 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: Impact energy (kinetic energy) - warning
MPL 15x15x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
27.30 km/h
(7.58 m/s)
|
0.24 J | |
| 30 mm |
46.08 km/h
(12.80 m/s)
|
0.69 J | |
| 50 mm |
59.47 km/h
(16.52 m/s)
|
1.15 J | |
| 100 mm |
84.11 km/h
(23.36 m/s)
|
2.30 J |
Table 9: Coating parameters (durability)
MPL 15x15x5 / 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 15x15x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 7 651 Mx | 76.5 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Submerged application
MPL 15x15x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 5.87 kg | Standard |
| Water (riverbed) |
6.72 kg
(+0.85 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical surface, the magnet holds just a fraction of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.
3. Temperature resistance
*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) = 0.40
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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros and cons of neodymium magnets.
Advantages
- They retain magnetic properties for around 10 years – the loss is just ~1% (in theory),
- Neodymium magnets are characterized by exceptionally resistant to demagnetization caused by external magnetic fields,
- In other words, due to the smooth layer of gold, the element is aesthetically pleasing,
- Magnetic induction on the top side of the magnet turns out to be very high,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of exact shaping as well as optimizing to complex applications,
- Significant place in innovative solutions – they are utilized in hard drives, drive modules, medical devices, and complex engineering applications.
- 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 improves its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
- Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to complicate diagnosis medical when they are in the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum holding power of the magnet – what contributes to it?
- on a base made of structural steel, optimally conducting the magnetic flux
- whose thickness is min. 10 mm
- with a plane perfectly flat
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at room temperature
Practical lifting capacity: influencing factors
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) 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 smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Chemical composition of the base – low-carbon steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
- Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.
Safe handling of NdFeB magnets
Maximum temperature
Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.
Warning for heart patients
For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to handle the magnets.
Keep away from children
These products are not intended for children. Eating multiple magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.
Respect the power
Handle magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.
Magnetic media
Do not bring magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Flammability
Powder generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Risk of cracking
Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.
Hand protection
Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.
Nickel coating and allergies
Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands and choose coated magnets.
Keep away from electronics
Note: rare earth magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.
