MPL 20x10x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020127
GTIN/EAN: 5906301811336
length
20 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
3 g
Magnetization Direction
↑ axial
Load capacity
1.88 kg / 18.44 N
Magnetic Induction
168.24 mT / 1682 Gs
Coating
[NiCuNi] Nickel
1.538 ZŁ with VAT / pcs + price for transport
1.250 ZŁ net + 23% VAT / pcs
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Physical properties - MPL 20x10x2 / N38 - lamellar magnet
Specification / characteristics - MPL 20x10x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020127 |
| GTIN/EAN | 5906301811336 |
| 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 | 2 mm [±0,1 mm] |
| Weight | 3 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.88 kg / 18.44 N |
| Magnetic Induction ~ ? | 168.24 mT / 1682 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 assembly - data
Presented information are the outcome of a physical simulation. Results are based on models for the material Nd2Fe14B. Real-world parameters may deviate from the simulation results. Use these data as a supplementary guide when designing systems.
Table 1: Static force (force vs distance) - power drop
MPL 20x10x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1682 Gs
168.2 mT
|
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
low risk |
| 1 mm |
1524 Gs
152.4 mT
|
1.54 kg / 3.40 lbs
1544.3 g / 15.1 N
|
low risk |
| 2 mm |
1316 Gs
131.6 mT
|
1.15 kg / 2.54 lbs
1150.1 g / 11.3 N
|
low risk |
| 3 mm |
1101 Gs
110.1 mT
|
0.81 kg / 1.78 lbs
806.0 g / 7.9 N
|
low risk |
| 5 mm |
744 Gs
74.4 mT
|
0.37 kg / 0.81 lbs
367.6 g / 3.6 N
|
low risk |
| 10 mm |
288 Gs
28.8 mT
|
0.06 kg / 0.12 lbs
55.1 g / 0.5 N
|
low risk |
| 15 mm |
129 Gs
12.9 mT
|
0.01 kg / 0.02 lbs
11.1 g / 0.1 N
|
low risk |
| 20 mm |
66 Gs
6.6 mT
|
0.00 kg / 0.01 lbs
2.9 g / 0.0 N
|
low risk |
| 30 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
|
low risk |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Shear hold (wall)
MPL 20x10x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.38 kg / 0.83 lbs
376.0 g / 3.7 N
|
| 1 mm | Stal (~0.2) |
0.31 kg / 0.68 lbs
308.0 g / 3.0 N
|
| 2 mm | Stal (~0.2) |
0.23 kg / 0.51 lbs
230.0 g / 2.3 N
|
| 3 mm | Stal (~0.2) |
0.16 kg / 0.36 lbs
162.0 g / 1.6 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.16 lbs
74.0 g / 0.7 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
12.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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 20x10x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.56 kg / 1.24 lbs
564.0 g / 5.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.38 kg / 0.83 lbs
376.0 g / 3.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.19 kg / 0.41 lbs
188.0 g / 1.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.94 kg / 2.07 lbs
940.0 g / 9.2 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 20x10x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.19 kg / 0.41 lbs
188.0 g / 1.8 N
|
| 1 mm |
|
0.47 kg / 1.04 lbs
470.0 g / 4.6 N
|
| 2 mm |
|
0.94 kg / 2.07 lbs
940.0 g / 9.2 N
|
| 3 mm |
|
1.41 kg / 3.11 lbs
1410.0 g / 13.8 N
|
| 5 mm |
|
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
| 10 mm |
|
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
| 11 mm |
|
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
| 12 mm |
|
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
Table 5: Thermal stability (stability) - power drop
MPL 20x10x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.88 kg / 4.14 lbs
1880.0 g / 18.4 N
|
OK |
| 40 °C | -2.2% |
1.84 kg / 4.05 lbs
1838.6 g / 18.0 N
|
OK |
| 60 °C | -4.4% |
1.80 kg / 3.96 lbs
1797.3 g / 17.6 N
|
|
| 80 °C | -6.6% |
1.76 kg / 3.87 lbs
1755.9 g / 17.2 N
|
|
| 100 °C | -28.8% |
1.34 kg / 2.95 lbs
1338.6 g / 13.1 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 20x10x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.49 kg / 7.69 lbs
2 995 Gs
|
0.52 kg / 1.15 lbs
523 g / 5.1 N
|
N/A |
| 1 mm |
3.21 kg / 7.08 lbs
3 227 Gs
|
0.48 kg / 1.06 lbs
481 g / 4.7 N
|
2.89 kg / 6.37 lbs
~0 Gs
|
| 2 mm |
2.87 kg / 6.32 lbs
3 049 Gs
|
0.43 kg / 0.95 lbs
430 g / 4.2 N
|
2.58 kg / 5.69 lbs
~0 Gs
|
| 3 mm |
2.50 kg / 5.51 lbs
2 846 Gs
|
0.37 kg / 0.83 lbs
375 g / 3.7 N
|
2.25 kg / 4.95 lbs
~0 Gs
|
| 5 mm |
1.80 kg / 3.96 lbs
2 414 Gs
|
0.27 kg / 0.59 lbs
269 g / 2.6 N
|
1.62 kg / 3.56 lbs
~0 Gs
|
| 10 mm |
0.68 kg / 1.50 lbs
1 487 Gs
|
0.10 kg / 0.23 lbs
102 g / 1.0 N
|
0.61 kg / 1.35 lbs
~0 Gs
|
| 20 mm |
0.10 kg / 0.23 lbs
576 Gs
|
0.02 kg / 0.03 lbs
15 g / 0.2 N
|
0.09 kg / 0.20 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
76 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
47 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
31 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
21 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
15 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
11 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MPL 20x10x2 / 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: Impact energy (cracking risk) - warning
MPL 20x10x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.70 km/h
(7.14 m/s)
|
0.08 J | |
| 30 mm |
43.73 km/h
(12.15 m/s)
|
0.22 J | |
| 50 mm |
56.45 km/h
(15.68 m/s)
|
0.37 J | |
| 100 mm |
79.84 km/h
(22.18 m/s)
|
0.74 J |
Table 9: Corrosion resistance
MPL 20x10x2 / 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 20x10x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 825 Mx | 38.2 µWb |
| Pc Coefficient | 0.19 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 20x10x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.88 kg | Standard |
| Water (riverbed) |
2.15 kg
(+0.27 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet holds just a fraction of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Thermal stability
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.19
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 products
Pros as well as cons of neodymium magnets.
Pros
- They retain attractive force for around 10 years – the loss is just ~1% (according to analyses),
- Magnets effectively resist against demagnetization caused by ambient magnetic noise,
- By using a shiny layer of nickel, the element acquires an elegant look,
- The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
- Due to the ability of precise shaping and customization to specialized projects, neodymium magnets can be modeled in a broad palette of forms and dimensions, which expands the range of possible applications,
- Wide application in future technologies – they are used in HDD drives, electric motors, medical equipment, as well as complex engineering applications.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
- Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets are able to 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
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what affects it?
- using a base made of low-carbon steel, acting as a ideal flux conductor
- possessing a thickness of at least 10 mm to avoid saturation
- characterized by lack of roughness
- under conditions of ideal adhesion (metal-to-metal)
- during pulling in a direction perpendicular to the plane
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Air gap (between the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
- Angle of force application – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick plate does not accept the full field, causing part of the power to be wasted to the other side.
- Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
- Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Warnings
Adults only
Absolutely keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.
Health Danger
For implant holders: Powerful magnets disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Keep away from electronics
Be aware: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and GPS.
Bodily injuries
Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Safe operation
Use magnets consciously. Their immense force can shock even professionals. Stay alert and respect their power.
Nickel coating and allergies
Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, avoid direct skin contact and choose versions in plastic housing.
Do not drill into magnets
Mechanical processing of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Shattering risk
Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Heat sensitivity
Keep cool. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).
Cards and drives
Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
