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
bulk discounts:
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Product card - 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 |
Technical simulation of the product - technical parameters
Presented data constitute the direct effect of a physical calculation. Values are based on models for the material Nd2Fe14B. Actual performance may differ. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static force (pull 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
|
weak grip |
| 1 mm |
1524 Gs
152.4 mT
|
1.54 kg / 3.40 LBS
1544.3 g / 15.1 N
|
weak grip |
| 2 mm |
1316 Gs
131.6 mT
|
1.15 kg / 2.54 LBS
1150.1 g / 11.3 N
|
weak grip |
| 3 mm |
1101 Gs
110.1 mT
|
0.81 kg / 1.78 LBS
806.0 g / 7.9 N
|
weak grip |
| 5 mm |
744 Gs
74.4 mT
|
0.37 kg / 0.81 LBS
367.6 g / 3.6 N
|
weak grip |
| 10 mm |
288 Gs
28.8 mT
|
0.06 kg / 0.12 LBS
55.1 g / 0.5 N
|
weak grip |
| 15 mm |
129 Gs
12.9 mT
|
0.01 kg / 0.02 LBS
11.1 g / 0.1 N
|
weak grip |
| 20 mm |
66 Gs
6.6 mT
|
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
|
weak grip |
| 30 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
|
weak grip |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical load (vertical surface)
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 (sliding) - behavior on slippery surfaces
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 (substrate influence) - 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 resistance (material behavior) - resistance threshold
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) | Lateral Force (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 (electronics) - warnings
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 |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 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: Dynamics (cracking risk) - collision effects
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: Surface protection spec
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: Electrical data (Flux)
MPL 20x10x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 825 Mx | 38.2 µWb |
| Pc Coefficient | 0.19 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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. Vertical hold
*Caution: On a vertical wall, the magnet holds only a fraction of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely reduces the holding force.
3. Heat tolerance
*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% |
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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Advantages and disadvantages of Nd2Fe14B magnets.
Pros
- They retain full power for nearly ten years – the drop is just ~1% (based on simulations),
- Magnets effectively defend themselves against demagnetization caused by external fields,
- By covering with a reflective coating of gold, the element has an proper look,
- Magnetic induction on the working part of the magnet turns out to be maximum,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
- Thanks to the ability of accurate shaping and adaptation to unique needs, neodymium magnets can be modeled in a broad palette of shapes and sizes, which makes them more universal,
- Huge importance in advanced technology sectors – they are used in hard drives, electric drive systems, medical devices, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend casing - magnetic mount, due to difficulties in producing threads inside the magnet and complex forms.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these products are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Highest magnetic holding force – what affects it?
- on a plate made of mild steel, perfectly concentrating the magnetic field
- whose transverse dimension reaches at least 10 mm
- with a surface cleaned and smooth
- with direct contact (no coatings)
- for force applied at a right angle (pull-off, not shear)
- at standard ambient temperature
Determinants of practical lifting force of a magnet
- Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin plate does not accept the full field, causing part of the flux to be lost to the other side.
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate reduces the load capacity.
H&S for magnets
Threat to electronics
Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.
Crushing force
Pinching hazard: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.
Shattering risk
Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Powerful field
Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Implant safety
People with a pacemaker must keep an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.
Heat warning
Watch the temperature. Exposing the magnet to high heat will ruin its properties and strength.
Flammability
Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.
Warning for allergy sufferers
Studies show that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands and opt for coated magnets.
Keep away from children
These products are not toys. Eating a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires immediate surgery.
GPS Danger
Navigation devices and smartphones are extremely susceptible to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.
