MPL 5x5x1.2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020171
GTIN/EAN: 5906301811770
length
5 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
1.2 mm [±0,1 mm]
Weight
0.22 g
Magnetization Direction
↑ axial
Load capacity
0.44 kg / 4.28 N
Magnetic Induction
245.17 mT / 2452 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
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Technical data - MPL 5x5x1.2 / N38 - lamellar magnet
Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020171 |
| GTIN/EAN | 5906301811770 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 5 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 1.2 mm [±0,1 mm] |
| Weight | 0.22 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.44 kg / 4.28 N |
| Magnetic Induction ~ ? | 245.17 mT / 2452 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 modeling of the assembly - data
These information are the outcome of a engineering simulation. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Use these calculations as a reference point for designers.
Table 1: Static pull force (force vs gap) - characteristics
MPL 5x5x1.2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2450 Gs
245.0 mT
|
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
safe |
| 1 mm |
1739 Gs
173.9 mT
|
0.22 kg / 0.49 lbs
221.8 g / 2.2 N
|
safe |
| 2 mm |
1054 Gs
105.4 mT
|
0.08 kg / 0.18 lbs
81.4 g / 0.8 N
|
safe |
| 3 mm |
622 Gs
62.2 mT
|
0.03 kg / 0.06 lbs
28.4 g / 0.3 N
|
safe |
| 5 mm |
241 Gs
24.1 mT
|
0.00 kg / 0.01 lbs
4.3 g / 0.0 N
|
safe |
| 10 mm |
45 Gs
4.5 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
| 15 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 20 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Sliding force (vertical surface)
MPL 5x5x1.2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.09 kg / 0.19 lbs
88.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 lbs
16.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 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: Wall mounting (shearing) - vertical pull
MPL 5x5x1.2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.13 kg / 0.29 lbs
132.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.19 lbs
88.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.22 kg / 0.49 lbs
220.0 g / 2.2 N
|
Table 4: Material efficiency (saturation) - power losses
MPL 5x5x1.2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.24 lbs
110.0 g / 1.1 N
|
| 2 mm |
|
0.22 kg / 0.49 lbs
220.0 g / 2.2 N
|
| 3 mm |
|
0.33 kg / 0.73 lbs
330.0 g / 3.2 N
|
| 5 mm |
|
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
| 10 mm |
|
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
| 11 mm |
|
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
| 12 mm |
|
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
Table 5: Working in heat (stability) - resistance threshold
MPL 5x5x1.2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.44 kg / 0.97 lbs
440.0 g / 4.3 N
|
OK |
| 40 °C | -2.2% |
0.43 kg / 0.95 lbs
430.3 g / 4.2 N
|
OK |
| 60 °C | -4.4% |
0.42 kg / 0.93 lbs
420.6 g / 4.1 N
|
|
| 80 °C | -6.6% |
0.41 kg / 0.91 lbs
411.0 g / 4.0 N
|
|
| 100 °C | -28.8% |
0.31 kg / 0.69 lbs
313.3 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 5x5x1.2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.92 kg / 2.04 lbs
4 027 Gs
|
0.14 kg / 0.31 lbs
139 g / 1.4 N
|
N/A |
| 1 mm |
0.70 kg / 1.54 lbs
4 260 Gs
|
0.10 kg / 0.23 lbs
105 g / 1.0 N
|
0.63 kg / 1.39 lbs
~0 Gs
|
| 2 mm |
0.47 kg / 1.03 lbs
3 478 Gs
|
0.07 kg / 0.15 lbs
70 g / 0.7 N
|
0.42 kg / 0.93 lbs
~0 Gs
|
| 3 mm |
0.29 kg / 0.63 lbs
2 734 Gs
|
0.04 kg / 0.10 lbs
43 g / 0.4 N
|
0.26 kg / 0.57 lbs
~0 Gs
|
| 5 mm |
0.10 kg / 0.22 lbs
1 617 Gs
|
0.02 kg / 0.03 lbs
15 g / 0.1 N
|
0.09 kg / 0.20 lbs
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 lbs
482 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 lbs
90 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 50 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
|
| 60 mm |
0.00 kg / 0.00 lbs
4 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
3 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
2 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
1 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
1 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 5x5x1.2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Car key | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (cracking risk) - warning
MPL 5x5x1.2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
45.11 km/h
(12.53 m/s)
|
0.02 J | |
| 30 mm |
78.12 km/h
(21.70 m/s)
|
0.05 J | |
| 50 mm |
100.85 km/h
(28.01 m/s)
|
0.09 J | |
| 100 mm |
142.63 km/h
(39.62 m/s)
|
0.17 J |
Table 9: Corrosion resistance
MPL 5x5x1.2 / 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 5x5x1.2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 695 Mx | 7.0 µWb |
| Pc Coefficient | 0.30 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 5x5x1.2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.44 kg | Standard |
| Water (riverbed) |
0.50 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet holds only ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Thermal stability
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.30
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% |
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
Strengths as well as weaknesses of neodymium magnets.
Benefits
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- They maintain their magnetic properties even under strong external field,
- In other words, due to the glossy layer of gold, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in constructing and the ability to modify to individual projects,
- Huge importance in high-tech industry – they serve a role in computer drives, electric motors, advanced medical instruments, and technologically advanced constructions.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Limitations
- At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets decrease their strength 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 stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic mount.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small elements of these magnets are able to be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Lifting parameters
Maximum lifting capacity of the magnet – what affects it?
- using a plate made of mild steel, acting as a circuit closing element
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with a plane free of scratches
- without the slightest clearance between the magnet and steel
- under perpendicular force direction (90-degree angle)
- at room temperature
Key elements affecting lifting force
- Air gap (betwixt the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Load vector – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin plate does not accept the full field, causing part of the power to be escaped to the other side.
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
- Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Powerful field
Handle magnets consciously. Their immense force can surprise even professionals. Plan your moves and respect their force.
Operating temperature
Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Dust is flammable
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Compass and GPS
GPS units and mobile phones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Magnet fragility
NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets leads to them shattering into small pieces.
Protect data
Data protection: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).
Do not give to children
These products are not toys. Swallowing multiple magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.
Implant safety
Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can interfere with the operation of the implant.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop handling magnets and use protective gear.
Pinching danger
Big blocks can smash fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.
