MPL 20x10x1 / N38 - lamellar magnet
lamellar magnet
Catalog no 020126
GTIN/EAN: 5906301811329
length
20 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
1.5 g
Magnetization Direction
↑ axial
Load capacity
0.56 kg / 5.46 N
Magnetic Induction
87.15 mT / 871 Gs
Coating
[NiCuNi] Nickel
0.996 ZŁ with VAT / pcs + price for transport
0.810 ZŁ net + 23% VAT / pcs
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Technical data - MPL 20x10x1 / N38 - lamellar magnet
Specification / characteristics - MPL 20x10x1 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020126 |
| GTIN/EAN | 5906301811329 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 20 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 1.5 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.56 kg / 5.46 N |
| Magnetic Induction ~ ? | 87.15 mT / 871 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 analysis of the assembly - technical parameters
These values represent the direct effect of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.
Table 1: Static force (force vs distance) - characteristics
MPL 20x10x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
871 Gs
87.1 mT
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
safe |
| 1 mm |
811 Gs
81.1 mT
|
0.49 kg / 1.07 LBS
485.7 g / 4.8 N
|
safe |
| 2 mm |
713 Gs
71.3 mT
|
0.37 kg / 0.83 LBS
374.9 g / 3.7 N
|
safe |
| 3 mm |
603 Gs
60.3 mT
|
0.27 kg / 0.59 LBS
267.9 g / 2.6 N
|
safe |
| 5 mm |
409 Gs
40.9 mT
|
0.12 kg / 0.27 LBS
123.4 g / 1.2 N
|
safe |
| 10 mm |
157 Gs
15.7 mT
|
0.02 kg / 0.04 LBS
18.1 g / 0.2 N
|
safe |
| 15 mm |
69 Gs
6.9 mT
|
0.00 kg / 0.01 LBS
3.5 g / 0.0 N
|
safe |
| 20 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
|
safe |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Sliding load (wall)
MPL 20x10x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.11 kg / 0.25 LBS
112.0 g / 1.1 N
|
| 1 mm | Stal (~0.2) |
0.10 kg / 0.22 LBS
98.0 g / 1.0 N
|
| 2 mm | Stal (~0.2) |
0.07 kg / 0.16 LBS
74.0 g / 0.7 N
|
| 3 mm | Stal (~0.2) |
0.05 kg / 0.12 LBS
54.0 g / 0.5 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
24.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 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) - behavior on slippery surfaces
MPL 20x10x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.17 kg / 0.37 LBS
168.0 g / 1.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.11 kg / 0.25 LBS
112.0 g / 1.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.06 kg / 0.12 LBS
56.0 g / 0.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 20x10x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.06 kg / 0.12 LBS
56.0 g / 0.5 N
|
| 1 mm |
|
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
|
| 2 mm |
|
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
|
| 3 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
| 5 mm |
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| 10 mm |
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| 11 mm |
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| 12 mm |
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 20x10x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
OK |
| 40 °C | -2.2% |
0.55 kg / 1.21 LBS
547.7 g / 5.4 N
|
OK |
| 60 °C | -4.4% |
0.54 kg / 1.18 LBS
535.4 g / 5.3 N
|
|
| 80 °C | -6.6% |
0.52 kg / 1.15 LBS
523.0 g / 5.1 N
|
|
| 100 °C | -28.8% |
0.40 kg / 0.88 LBS
398.7 g / 3.9 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 20x10x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.94 kg / 2.06 LBS
1 682 Gs
|
0.14 kg / 0.31 LBS
140 g / 1.4 N
|
N/A |
| 1 mm |
0.89 kg / 1.96 LBS
1 696 Gs
|
0.13 kg / 0.29 LBS
133 g / 1.3 N
|
0.80 kg / 1.76 LBS
~0 Gs
|
| 2 mm |
0.81 kg / 1.79 LBS
1 623 Gs
|
0.12 kg / 0.27 LBS
122 g / 1.2 N
|
0.73 kg / 1.61 LBS
~0 Gs
|
| 3 mm |
0.72 kg / 1.59 LBS
1 530 Gs
|
0.11 kg / 0.24 LBS
108 g / 1.1 N
|
0.65 kg / 1.43 LBS
~0 Gs
|
| 5 mm |
0.53 kg / 1.18 LBS
1 316 Gs
|
0.08 kg / 0.18 LBS
80 g / 0.8 N
|
0.48 kg / 1.06 LBS
~0 Gs
|
| 10 mm |
0.21 kg / 0.45 LBS
818 Gs
|
0.03 kg / 0.07 LBS
31 g / 0.3 N
|
0.19 kg / 0.41 LBS
~0 Gs
|
| 20 mm |
0.03 kg / 0.07 LBS
313 Gs
|
0.00 kg / 0.01 LBS
5 g / 0.0 N
|
0.03 kg / 0.06 LBS
~0 Gs
|
| 50 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
|
| 60 mm |
0.00 kg / 0.00 LBS
25 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
16 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
11 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
8 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
6 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MPL 20x10x1 / 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 |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 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) | 0.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MPL 20x10x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.88 km/h
(5.52 m/s)
|
0.02 J | |
| 30 mm |
33.76 km/h
(9.38 m/s)
|
0.07 J | |
| 50 mm |
43.57 km/h
(12.10 m/s)
|
0.11 J | |
| 100 mm |
61.62 km/h
(17.12 m/s)
|
0.22 J |
Table 9: Corrosion resistance
MPL 20x10x1 / 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: Electrical data (Pc)
MPL 20x10x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 173 Mx | 21.7 µWb |
| Pc Coefficient | 0.10 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 20x10x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.56 kg | Standard |
| Water (riverbed) |
0.64 kg
(+0.08 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*For N38 grade, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.10
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% |
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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Pros as well as cons of rare earth magnets.
Strengths
- They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
- They feature excellent resistance to magnetic field loss as a result of external magnetic sources,
- In other words, due to the aesthetic finish of nickel, the element becomes visually attractive,
- Magnets are distinguished by excellent magnetic induction on the outer layer,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- Possibility of individual forming and optimizing to atypical applications,
- Key role in advanced technology sectors – they find application in hard drives, electric drive systems, medical devices, and modern systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- We recommend casing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small elements of these devices are able to complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Best holding force of the magnet in ideal parameters – what it depends on?
- with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
- with a cross-section of at least 10 mm
- characterized by lack of roughness
- without any air gap between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
Key elements affecting lifting force
- Air gap (between the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or dirt).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
- Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the holding force.
Safety rules for work with neodymium magnets
No play value
Always keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are very dangerous.
Machining danger
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.
Thermal limits
Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.
Magnetic media
Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can destroy these devices and wipe information from cards.
Fragile material
NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into small pieces.
Bone fractures
Large magnets can crush fingers instantly. Do not put your hand between two strong magnets.
Allergy Warning
Certain individuals suffer from a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Prolonged contact can result in an allergic reaction. We recommend use protective gloves.
Medical implants
People with a ICD must keep an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.
Handling guide
Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Keep away from electronics
A strong magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.
