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
bulk discounts:
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Detailed specification - 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 |
Technical simulation of the product - data
The following values represent the result of a mathematical calculation. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs distance) - power drop
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: Vertical 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 (sliding) - vertical pull
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 (saturation) - power losses
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: Working in heat (material behavior) - power drop
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 collision
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: Safety (HSE) (electronics) - precautionary measures
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 |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 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: Collisions (cracking risk) - warning
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: Corrosion resistance
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 (Flux)
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. Wall mount (shear)
*Caution: On a vertical wall, the magnet retains just ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Temperature resistance
*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 neodymium magnets.
Advantages
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- Neodymium magnets are remarkably resistant to magnetic field loss caused by external magnetic fields,
- The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
- They show high magnetic induction at the operating surface, making them more effective,
- 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 flexibility in shaping and the capacity to adapt to individual projects,
- Key role in modern industrial fields – they find application in magnetic memories, electric drive systems, medical equipment, also technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- Limited ability of making nuts in the magnet and complex shapes - preferred is cover - magnetic holder.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- with the application of a yoke made of special test steel, ensuring maximum field concentration
- possessing a thickness of minimum 10 mm to avoid saturation
- with a surface perfectly flat
- with direct contact (no impurities)
- under vertical force direction (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Distance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
- Steel thickness – too thin plate does not close the flux, causing part of the power to be escaped into the air.
- Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
- Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.
Warnings
Electronic hazard
Do not bring magnets close to a purse, computer, or TV. The magnetism can destroy these devices and erase data from cards.
Conscious usage
Handle magnets with awareness. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their power.
Medical interference
Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.
GPS Danger
Note: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your mobile, tablet, and navigation systems.
Pinching danger
Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!
Keep away from children
Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep away from children and animals.
Do not drill into magnets
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease handling magnets and use protective gear.
Magnets are brittle
Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.
Demagnetization risk
Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.
