MPL 10x10x4 / N38 - lamellar magnet
lamellar magnet
Catalog no 020112
GTIN/EAN: 5906301811183
length
10 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
3 g
Magnetization Direction
↑ axial
Load capacity
3.10 kg / 30.39 N
Magnetic Induction
360.85 mT / 3608 Gs
Coating
[NiCuNi] Nickel
1.538 ZŁ with VAT / pcs + price for transport
1.250 ZŁ net + 23% VAT / pcs
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Technical data - MPL 10x10x4 / N38 - lamellar magnet
Specification / characteristics - MPL 10x10x4 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020112 |
| GTIN/EAN | 5906301811183 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 10 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 3 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.10 kg / 30.39 N |
| Magnetic Induction ~ ? | 360.85 mT / 3608 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 product - data
Presented values are the direct effect of a physical calculation. Values are based on models for the material Nd2Fe14B. Actual parameters may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MPL 10x10x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3606 Gs
360.6 mT
|
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
strong |
| 1 mm |
3035 Gs
303.5 mT
|
2.20 kg / 4.84 pounds
2195.5 g / 21.5 N
|
strong |
| 2 mm |
2436 Gs
243.6 mT
|
1.41 kg / 3.12 pounds
1413.8 g / 13.9 N
|
safe |
| 3 mm |
1900 Gs
190.0 mT
|
0.86 kg / 1.90 pounds
860.8 g / 8.4 N
|
safe |
| 5 mm |
1127 Gs
112.7 mT
|
0.30 kg / 0.67 pounds
302.7 g / 3.0 N
|
safe |
| 10 mm |
347 Gs
34.7 mT
|
0.03 kg / 0.06 pounds
28.8 g / 0.3 N
|
safe |
| 15 mm |
140 Gs
14.0 mT
|
0.00 kg / 0.01 pounds
4.6 g / 0.0 N
|
safe |
| 20 mm |
68 Gs
6.8 mT
|
0.00 kg / 0.00 pounds
1.1 g / 0.0 N
|
safe |
| 30 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Slippage force (vertical surface)
MPL 10x10x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.62 kg / 1.37 pounds
620.0 g / 6.1 N
|
| 1 mm | Stal (~0.2) |
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 2 mm | Stal (~0.2) |
0.28 kg / 0.62 pounds
282.0 g / 2.8 N
|
| 3 mm | Stal (~0.2) |
0.17 kg / 0.38 pounds
172.0 g / 1.7 N
|
| 5 mm | Stal (~0.2) |
0.06 kg / 0.13 pounds
60.0 g / 0.6 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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) - behavior on slippery surfaces
MPL 10x10x4 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.93 kg / 2.05 pounds
930.0 g / 9.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.62 kg / 1.37 pounds
620.0 g / 6.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.31 kg / 0.68 pounds
310.0 g / 3.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.55 kg / 3.42 pounds
1550.0 g / 15.2 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 10x10x4 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.31 kg / 0.68 pounds
310.0 g / 3.0 N
|
| 1 mm |
|
0.78 kg / 1.71 pounds
775.0 g / 7.6 N
|
| 2 mm |
|
1.55 kg / 3.42 pounds
1550.0 g / 15.2 N
|
| 3 mm |
|
2.33 kg / 5.13 pounds
2325.0 g / 22.8 N
|
| 5 mm |
|
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
| 10 mm |
|
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
| 11 mm |
|
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
| 12 mm |
|
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 10x10x4 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.10 kg / 6.83 pounds
3100.0 g / 30.4 N
|
OK |
| 40 °C | -2.2% |
3.03 kg / 6.68 pounds
3031.8 g / 29.7 N
|
OK |
| 60 °C | -4.4% |
2.96 kg / 6.53 pounds
2963.6 g / 29.1 N
|
|
| 80 °C | -6.6% |
2.90 kg / 6.38 pounds
2895.4 g / 28.4 N
|
|
| 100 °C | -28.8% |
2.21 kg / 4.87 pounds
2207.2 g / 21.7 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 10x10x4 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.02 kg / 17.68 pounds
5 067 Gs
|
1.20 kg / 2.65 pounds
1203 g / 11.8 N
|
N/A |
| 1 mm |
6.85 kg / 15.11 pounds
6 667 Gs
|
1.03 kg / 2.27 pounds
1028 g / 10.1 N
|
6.17 kg / 13.59 pounds
~0 Gs
|
| 2 mm |
5.68 kg / 12.52 pounds
6 070 Gs
|
0.85 kg / 1.88 pounds
852 g / 8.4 N
|
5.11 kg / 11.27 pounds
~0 Gs
|
| 3 mm |
4.60 kg / 10.14 pounds
5 463 Gs
|
0.69 kg / 1.52 pounds
690 g / 6.8 N
|
4.14 kg / 9.13 pounds
~0 Gs
|
| 5 mm |
2.87 kg / 6.32 pounds
4 313 Gs
|
0.43 kg / 0.95 pounds
430 g / 4.2 N
|
2.58 kg / 5.69 pounds
~0 Gs
|
| 10 mm |
0.78 kg / 1.73 pounds
2 254 Gs
|
0.12 kg / 0.26 pounds
117 g / 1.2 N
|
0.70 kg / 1.55 pounds
~0 Gs
|
| 20 mm |
0.07 kg / 0.16 pounds
695 Gs
|
0.01 kg / 0.02 pounds
11 g / 0.1 N
|
0.07 kg / 0.15 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
76 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
46 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
30 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
21 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
15 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
11 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (electronics) - warnings
MPL 10x10x4 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MPL 10x10x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
32.61 km/h
(9.06 m/s)
|
0.12 J | |
| 30 mm |
56.15 km/h
(15.60 m/s)
|
0.36 J | |
| 50 mm |
72.49 km/h
(20.14 m/s)
|
0.61 J | |
| 100 mm |
102.52 km/h
(28.48 m/s)
|
1.22 J |
Table 9: Surface protection spec
MPL 10x10x4 / 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 10x10x4 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 760 Mx | 37.6 µWb |
| Pc Coefficient | 0.46 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 10x10x4 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.10 kg | Standard |
| Water (riverbed) |
3.55 kg
(+0.45 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) severely limits the holding force.
3. Thermal stability
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.46
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% |
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 Nd2Fe14B magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
- They possess excellent resistance to magnetic field loss as a result of external fields,
- A magnet with a metallic silver surface has an effective appearance,
- The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- In view of the potential of accurate forming and adaptation to unique requirements, NdFeB magnets can be modeled in a wide range of geometric configurations, which makes them more universal,
- Wide application in advanced technology sectors – they serve a role in computer drives, drive modules, diagnostic systems, and complex engineering applications.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these products can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Detachment force of the magnet in optimal conditions – what it depends on?
- on a base made of structural steel, perfectly concentrating the magnetic flux
- with a cross-section of at least 10 mm
- with a surface free of scratches
- with zero gap (without paint)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Determinants of practical lifting force of a magnet
- Gap (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Plate thickness – too thin plate causes magnetic saturation, causing part of the power to be wasted to the other side.
- Plate material – mild steel gives the best results. Higher carbon content lower magnetic properties and holding force.
- Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, 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 lowers the holding force.
Safety rules for work with neodymium magnets
Heat warning
Do not overheat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Beware of splinters
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
Sensitization to coating
Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop handling magnets and wear gloves.
Respect the power
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.
Fire warning
Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Finger safety
Risk of injury: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Warning for heart patients
Individuals with a ICD have to keep an large gap from magnets. The magnetic field can interfere with the functioning of the implant.
No play value
Adult use only. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.
Threat to navigation
Navigation devices and mobile phones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.
Protect data
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.
