MPL 20x8x6 / N38 - lamellar magnet
lamellar magnet
Catalog no 020134
GTIN/EAN: 5906301811404
length
20 mm [±0,1 mm]
Width
8 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
7.2 g
Magnetization Direction
↑ axial
Load capacity
6.27 kg / 61.50 N
Magnetic Induction
423.90 mT / 4239 Gs
Coating
[NiCuNi] Nickel
5.17 ZŁ with VAT / pcs + price for transport
4.20 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
otherwise let us know via
request form
the contact section.
Force along with shape of a magnet can be verified with our
modular calculator.
Orders submitted before 14:00 will be dispatched today!
Product card - MPL 20x8x6 / N38 - lamellar magnet
Specification / characteristics - MPL 20x8x6 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020134 |
| GTIN/EAN | 5906301811404 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 20 mm [±0,1 mm] |
| Width | 8 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 7.2 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 6.27 kg / 61.50 N |
| Magnetic Induction ~ ? | 423.90 mT / 4239 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 simulation of the magnet - data
The following information are the result of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world parameters may differ. Please consider these data as a supplementary guide during assembly planning.
Table 1: Static pull force (pull vs gap) - interaction chart
MPL 20x8x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4236 Gs
423.6 mT
|
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
medium risk |
| 1 mm |
3505 Gs
350.5 mT
|
4.29 kg / 9.47 pounds
4293.5 g / 42.1 N
|
medium risk |
| 2 mm |
2814 Gs
281.4 mT
|
2.77 kg / 6.10 pounds
2766.9 g / 27.1 N
|
medium risk |
| 3 mm |
2235 Gs
223.5 mT
|
1.75 kg / 3.85 pounds
1745.9 g / 17.1 N
|
safe |
| 5 mm |
1425 Gs
142.5 mT
|
0.71 kg / 1.56 pounds
709.0 g / 7.0 N
|
safe |
| 10 mm |
540 Gs
54.0 mT
|
0.10 kg / 0.22 pounds
101.9 g / 1.0 N
|
safe |
| 15 mm |
248 Gs
24.8 mT
|
0.02 kg / 0.05 pounds
21.5 g / 0.2 N
|
safe |
| 20 mm |
131 Gs
13.1 mT
|
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
safe |
| 30 mm |
48 Gs
4.8 mT
|
0.00 kg / 0.00 pounds
0.8 g / 0.0 N
|
safe |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
Table 2: Slippage capacity (vertical surface)
MPL 20x8x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.25 kg / 2.76 pounds
1254.0 g / 12.3 N
|
| 1 mm | Stal (~0.2) |
0.86 kg / 1.89 pounds
858.0 g / 8.4 N
|
| 2 mm | Stal (~0.2) |
0.55 kg / 1.22 pounds
554.0 g / 5.4 N
|
| 3 mm | Stal (~0.2) |
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
| 5 mm | Stal (~0.2) |
0.14 kg / 0.31 pounds
142.0 g / 1.4 N
|
| 10 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
20.0 g / 0.2 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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) - vertical pull
MPL 20x8x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.88 kg / 4.15 pounds
1881.0 g / 18.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.25 kg / 2.76 pounds
1254.0 g / 12.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.63 kg / 1.38 pounds
627.0 g / 6.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.14 kg / 6.91 pounds
3135.0 g / 30.8 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 20x8x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.63 kg / 1.38 pounds
627.0 g / 6.2 N
|
| 1 mm |
|
1.57 kg / 3.46 pounds
1567.5 g / 15.4 N
|
| 2 mm |
|
3.14 kg / 6.91 pounds
3135.0 g / 30.8 N
|
| 3 mm |
|
4.70 kg / 10.37 pounds
4702.5 g / 46.1 N
|
| 5 mm |
|
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
| 10 mm |
|
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
| 11 mm |
|
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
| 12 mm |
|
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 20x8x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
6.27 kg / 13.82 pounds
6270.0 g / 61.5 N
|
OK |
| 40 °C | -2.2% |
6.13 kg / 13.52 pounds
6132.1 g / 60.2 N
|
OK |
| 60 °C | -4.4% |
5.99 kg / 13.21 pounds
5994.1 g / 58.8 N
|
|
| 80 °C | -6.6% |
5.86 kg / 12.91 pounds
5856.2 g / 57.4 N
|
|
| 100 °C | -28.8% |
4.46 kg / 9.84 pounds
4464.2 g / 43.8 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 20x8x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.70 kg / 39.02 pounds
5 386 Gs
|
2.66 kg / 5.85 pounds
2655 g / 26.0 N
|
N/A |
| 1 mm |
14.82 kg / 32.66 pounds
7 751 Gs
|
2.22 kg / 4.90 pounds
2222 g / 21.8 N
|
13.33 kg / 29.40 pounds
~0 Gs
|
| 2 mm |
12.12 kg / 26.72 pounds
7 011 Gs
|
1.82 kg / 4.01 pounds
1818 g / 17.8 N
|
10.91 kg / 24.05 pounds
~0 Gs
|
| 3 mm |
9.78 kg / 21.55 pounds
6 296 Gs
|
1.47 kg / 3.23 pounds
1466 g / 14.4 N
|
8.80 kg / 19.40 pounds
~0 Gs
|
| 5 mm |
6.21 kg / 13.69 pounds
5 018 Gs
|
0.93 kg / 2.05 pounds
932 g / 9.1 N
|
5.59 kg / 12.32 pounds
~0 Gs
|
| 10 mm |
2.00 kg / 4.41 pounds
2 849 Gs
|
0.30 kg / 0.66 pounds
300 g / 2.9 N
|
1.80 kg / 3.97 pounds
~0 Gs
|
| 20 mm |
0.29 kg / 0.63 pounds
1 080 Gs
|
0.04 kg / 0.10 pounds
43 g / 0.4 N
|
0.26 kg / 0.57 pounds
~0 Gs
|
| 50 mm |
0.01 kg / 0.01 pounds
153 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 pounds
97 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
65 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
45 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
33 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
25 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 20x8x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (cracking risk) - collision effects
MPL 20x8x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
30.06 km/h
(8.35 m/s)
|
0.25 J | |
| 30 mm |
51.55 km/h
(14.32 m/s)
|
0.74 J | |
| 50 mm |
66.55 km/h
(18.49 m/s)
|
1.23 J | |
| 100 mm |
94.11 km/h
(26.14 m/s)
|
2.46 J |
Table 9: Surface protection spec
MPL 20x8x6 / 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 (Flux)
MPL 20x8x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 558 Mx | 65.6 µWb |
| Pc Coefficient | 0.52 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 20x8x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 6.27 kg | Standard |
| Water (riverbed) |
7.18 kg
(+0.91 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet retains only approx. 20-30% of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) severely limits the holding force.
3. Power loss vs temp
*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) = 0.52
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out more deals
Advantages and disadvantages of neodymium magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They retain their magnetic properties even under strong external field,
- A magnet with a shiny silver surface looks better,
- They feature high magnetic induction at the operating surface, which improves attraction properties,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to freedom in designing and the ability to customize to unusual requirements,
- Versatile presence in high-tech industry – they are used in computer drives, motor assemblies, medical devices, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems
Limitations
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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 usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- We recommend cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complex shapes.
- Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Best holding force of the magnet in ideal parameters – what affects it?
- with the contact of a sheet made of special test steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with an ground contact surface
- with direct contact (no paint)
- during pulling in a direction perpendicular to the plane
- at room temperature
Key elements affecting lifting force
- Clearance – the presence of foreign body (rust, tape, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Metal type – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Dust is flammable
Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Threat to electronics
Powerful magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.
Powerful field
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Skin irritation risks
Some people have a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact may cause dermatitis. We strongly advise wear protective gloves.
Choking Hazard
Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Store out of reach of kids and pets.
Life threat
Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.
Protective goggles
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
Impact on smartphones
An intense magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a device to prevent breaking the sensors.
Crushing risk
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying anything in their path. Be careful!
Power loss in heat
Do not overheat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
