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 details - 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 |
Physical modeling of the assembly - data
These information constitute the direct effect of a engineering calculation. Results are based on models for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Please consider these calculations as a preliminary roadmap for designers.
Table 1: Static pull force (pull 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 pounds
560.0 g / 5.5 N
|
weak grip |
| 1 mm |
811 Gs
81.1 mT
|
0.49 kg / 1.07 pounds
485.7 g / 4.8 N
|
weak grip |
| 2 mm |
713 Gs
71.3 mT
|
0.37 kg / 0.83 pounds
374.9 g / 3.7 N
|
weak grip |
| 3 mm |
603 Gs
60.3 mT
|
0.27 kg / 0.59 pounds
267.9 g / 2.6 N
|
weak grip |
| 5 mm |
409 Gs
40.9 mT
|
0.12 kg / 0.27 pounds
123.4 g / 1.2 N
|
weak grip |
| 10 mm |
157 Gs
15.7 mT
|
0.02 kg / 0.04 pounds
18.1 g / 0.2 N
|
weak grip |
| 15 mm |
69 Gs
6.9 mT
|
0.00 kg / 0.01 pounds
3.5 g / 0.0 N
|
weak grip |
| 20 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 pounds
0.9 g / 0.0 N
|
weak grip |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical force (wall)
MPL 20x10x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.11 kg / 0.25 pounds
112.0 g / 1.1 N
|
| 1 mm | Stal (~0.2) |
0.10 kg / 0.22 pounds
98.0 g / 1.0 N
|
| 2 mm | Stal (~0.2) |
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
|
| 3 mm | Stal (~0.2) |
0.05 kg / 0.12 pounds
54.0 g / 0.5 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
24.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 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: 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 pounds
168.0 g / 1.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.11 kg / 0.25 pounds
112.0 g / 1.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.06 kg / 0.12 pounds
56.0 g / 0.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.28 kg / 0.62 pounds
280.0 g / 2.7 N
|
Table 4: Material efficiency (substrate influence) - 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 pounds
56.0 g / 0.5 N
|
| 1 mm |
|
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| 2 mm |
|
0.28 kg / 0.62 pounds
280.0 g / 2.7 N
|
| 3 mm |
|
0.42 kg / 0.93 pounds
420.0 g / 4.1 N
|
| 5 mm |
|
0.56 kg / 1.23 pounds
560.0 g / 5.5 N
|
| 10 mm |
|
0.56 kg / 1.23 pounds
560.0 g / 5.5 N
|
| 11 mm |
|
0.56 kg / 1.23 pounds
560.0 g / 5.5 N
|
| 12 mm |
|
0.56 kg / 1.23 pounds
560.0 g / 5.5 N
|
Table 5: Thermal resistance (material behavior) - 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 pounds
560.0 g / 5.5 N
|
OK |
| 40 °C | -2.2% |
0.55 kg / 1.21 pounds
547.7 g / 5.4 N
|
OK |
| 60 °C | -4.4% |
0.54 kg / 1.18 pounds
535.4 g / 5.3 N
|
|
| 80 °C | -6.6% |
0.52 kg / 1.15 pounds
523.0 g / 5.1 N
|
|
| 100 °C | -28.8% |
0.40 kg / 0.88 pounds
398.7 g / 3.9 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 20x10x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.94 kg / 2.06 pounds
1 682 Gs
|
0.14 kg / 0.31 pounds
140 g / 1.4 N
|
N/A |
| 1 mm |
0.89 kg / 1.96 pounds
1 696 Gs
|
0.13 kg / 0.29 pounds
133 g / 1.3 N
|
0.80 kg / 1.76 pounds
~0 Gs
|
| 2 mm |
0.81 kg / 1.79 pounds
1 623 Gs
|
0.12 kg / 0.27 pounds
122 g / 1.2 N
|
0.73 kg / 1.61 pounds
~0 Gs
|
| 3 mm |
0.72 kg / 1.59 pounds
1 530 Gs
|
0.11 kg / 0.24 pounds
108 g / 1.1 N
|
0.65 kg / 1.43 pounds
~0 Gs
|
| 5 mm |
0.53 kg / 1.18 pounds
1 316 Gs
|
0.08 kg / 0.18 pounds
80 g / 0.8 N
|
0.48 kg / 1.06 pounds
~0 Gs
|
| 10 mm |
0.21 kg / 0.45 pounds
818 Gs
|
0.03 kg / 0.07 pounds
31 g / 0.3 N
|
0.19 kg / 0.41 pounds
~0 Gs
|
| 20 mm |
0.03 kg / 0.07 pounds
313 Gs
|
0.00 kg / 0.01 pounds
5 g / 0.0 N
|
0.03 kg / 0.06 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
40 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
25 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
16 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
11 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
8 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
6 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.0 cm |
| Car key | 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 (cracking risk) - 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: Surface protection spec
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: Construction 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: Submerged application
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
*Note: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Heat tolerance
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.10
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also offers
Strengths and weaknesses of rare earth magnets.
Strengths
- They retain attractive force for nearly 10 years – the loss is just ~1% (according to analyses),
- Magnets effectively resist against demagnetization caused by external fields,
- By covering with a decorative coating of silver, the element has an modern look,
- They are known for high magnetic induction at the operating surface, which improves attraction properties,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Possibility of exact shaping as well as modifying to precise needs,
- Significant place in electronics industry – they are utilized in computer drives, drive modules, diagnostic systems, as well as technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions
Disadvantages
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing 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 advise our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of making threads in the magnet and complicated forms - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these products can disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic field
- possessing a massiveness of at least 10 mm to ensure full flux closure
- with an ideally smooth contact surface
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at temperature room level
Impact of factors on magnetic holding capacity in practice
- Air gap (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
- Material type – the best choice is high-permeability steel. Hardened steels may attract less.
- Surface quality – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
- Heat – 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 tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.
Safety rules for work with NdFeB magnets
Mechanical processing
Machining of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
GPS Danger
Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Pinching danger
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing everything in their path. Be careful!
Avoid contact if allergic
Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose coated magnets.
Magnet fragility
Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets leads to them shattering into shards.
Handling guide
Before starting, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Maximum temperature
Avoid heat. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Health Danger
Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.
Swallowing risk
Only for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of children and animals.
Electronic hazard
Intense magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.
