MPL 15x3x6 / N38 - lamellar magnet
lamellar magnet
Catalog no 020122
GTIN/EAN: 5906301811282
length
15 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
2.03 g
Magnetization Direction
↑ axial
Load capacity
1.90 kg / 18.68 N
Magnetic Induction
543.23 mT / 5432 Gs
Coating
[NiCuNi] Nickel
0.726 ZŁ with VAT / pcs + price for transport
0.590 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 15x3x6 / N38 - lamellar magnet
Specification / characteristics - MPL 15x3x6 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020122 |
| GTIN/EAN | 5906301811282 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 3 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 2.03 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.90 kg / 18.68 N |
| Magnetic Induction ~ ? | 543.23 mT / 5432 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 |
Physical analysis of the magnet - report
The following data constitute the result of a physical analysis. Results rely on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these data as a supplementary guide during assembly planning.
Table 1: Static force (force vs gap) - characteristics
MPL 15x3x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5423 Gs
542.3 mT
|
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
low risk |
| 1 mm |
3221 Gs
322.1 mT
|
0.67 kg / 1.48 lbs
670.2 g / 6.6 N
|
low risk |
| 2 mm |
1942 Gs
194.2 mT
|
0.24 kg / 0.54 lbs
243.7 g / 2.4 N
|
low risk |
| 3 mm |
1274 Gs
127.4 mT
|
0.10 kg / 0.23 lbs
104.9 g / 1.0 N
|
low risk |
| 5 mm |
652 Gs
65.2 mT
|
0.03 kg / 0.06 lbs
27.5 g / 0.3 N
|
low risk |
| 10 mm |
195 Gs
19.5 mT
|
0.00 kg / 0.01 lbs
2.5 g / 0.0 N
|
low risk |
| 15 mm |
81 Gs
8.1 mT
|
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
|
low risk |
| 20 mm |
41 Gs
4.1 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
low risk |
| 30 mm |
14 Gs
1.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 50 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (vertical surface)
MPL 15x3x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.38 kg / 0.84 lbs
380.0 g / 3.7 N
|
| 1 mm | Stal (~0.2) |
0.13 kg / 0.30 lbs
134.0 g / 1.3 N
|
| 2 mm | Stal (~0.2) |
0.05 kg / 0.11 lbs
48.0 g / 0.5 N
|
| 3 mm | Stal (~0.2) |
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
|
| 5 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 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: Vertical assembly (shearing) - vertical pull
MPL 15x3x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.57 kg / 1.26 lbs
570.0 g / 5.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.38 kg / 0.84 lbs
380.0 g / 3.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 15x3x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
|
| 1 mm |
|
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
|
| 2 mm |
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
| 3 mm |
|
1.42 kg / 3.14 lbs
1425.0 g / 14.0 N
|
| 5 mm |
|
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
| 10 mm |
|
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
| 11 mm |
|
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
| 12 mm |
|
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
Table 5: Thermal resistance (material behavior) - thermal limit
MPL 15x3x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
|
OK |
| 40 °C | -2.2% |
1.86 kg / 4.10 lbs
1858.2 g / 18.2 N
|
OK |
| 60 °C | -4.4% |
1.82 kg / 4.00 lbs
1816.4 g / 17.8 N
|
OK |
| 80 °C | -6.6% |
1.77 kg / 3.91 lbs
1774.6 g / 17.4 N
|
|
| 100 °C | -28.8% |
1.35 kg / 2.98 lbs
1352.8 g / 13.3 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 15x3x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.16 kg / 17.99 lbs
5 914 Gs
|
1.22 kg / 2.70 lbs
1224 g / 12.0 N
|
N/A |
| 1 mm |
4.96 kg / 10.94 lbs
8 460 Gs
|
0.74 kg / 1.64 lbs
745 g / 7.3 N
|
4.47 kg / 9.85 lbs
~0 Gs
|
| 2 mm |
2.88 kg / 6.34 lbs
6 441 Gs
|
0.43 kg / 0.95 lbs
432 g / 4.2 N
|
2.59 kg / 5.71 lbs
~0 Gs
|
| 3 mm |
1.70 kg / 3.75 lbs
4 950 Gs
|
0.25 kg / 0.56 lbs
255 g / 2.5 N
|
1.53 kg / 3.37 lbs
~0 Gs
|
| 5 mm |
0.67 kg / 1.48 lbs
3 116 Gs
|
0.10 kg / 0.22 lbs
101 g / 1.0 N
|
0.61 kg / 1.34 lbs
~0 Gs
|
| 10 mm |
0.12 kg / 0.26 lbs
1 304 Gs
|
0.02 kg / 0.04 lbs
18 g / 0.2 N
|
0.11 kg / 0.23 lbs
~0 Gs
|
| 20 mm |
0.01 kg / 0.02 lbs
391 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.02 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
46 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 lbs
29 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 lbs
19 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
13 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
9 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
7 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) - precautionary measures
MPL 15x3x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (cracking risk) - warning
MPL 15x3x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
30.88 km/h
(8.58 m/s)
|
0.07 J | |
| 30 mm |
53.44 km/h
(14.84 m/s)
|
0.22 J | |
| 50 mm |
68.99 km/h
(19.16 m/s)
|
0.37 J | |
| 100 mm |
97.57 km/h
(27.10 m/s)
|
0.75 J |
Table 9: Surface protection spec
MPL 15x3x6 / 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 15x3x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 390 Mx | 23.9 µWb |
| Pc Coefficient | 0.79 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MPL 15x3x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.90 kg | Standard |
| Water (riverbed) |
2.18 kg
(+0.28 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet holds just a fraction of its nominal pull.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Heat tolerance
*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) = 0.79
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages and disadvantages of neodymium magnets.
Pros
- They do not lose strength, even after nearly ten years – the drop in lifting capacity is only ~1% (theoretically),
- Magnets effectively protect themselves against demagnetization caused by external fields,
- In other words, due to the glossy surface of silver, the element is aesthetically pleasing,
- They show high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Thanks to versatility in designing and the capacity to modify to complex applications,
- Huge importance in electronics industry – they are utilized in mass storage devices, electromotive mechanisms, medical devices, as well as multitasking production systems.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complex shapes in magnets, we recommend using cover - magnetic holder.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Lifting parameters
Magnetic strength at its maximum – what affects it?
- using a plate made of high-permeability steel, functioning as a magnetic yoke
- with a cross-section no less than 10 mm
- with an ideally smooth touching surface
- without the slightest clearance between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Practical lifting capacity: influencing factors
- Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
- Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.
Warnings
Danger to pacemakers
Patients with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.
Permanent damage
Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Sensitization to coating
Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for coated magnets.
Protective goggles
Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them shattering into small pieces.
Phone sensors
GPS units and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Pinching danger
Big blocks can break fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.
Keep away from computers
Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Flammability
Powder created during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
No play value
Neodymium magnets are not toys. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.
Safe operation
Exercise caution. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can react.
