MPL 10x7x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020115
GTIN/EAN: 5906301811213
length
10 mm [±0,1 mm]
Width
7 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.58 g
Magnetization Direction
↑ axial
Load capacity
2.02 kg / 19.82 N
Magnetic Induction
339.79 mT / 3398 Gs
Coating
[NiCuNi] Nickel
0.849 ZŁ with VAT / pcs + price for transport
0.690 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 10x7x3 / N38 - lamellar magnet
Specification / characteristics - MPL 10x7x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020115 |
| GTIN/EAN | 5906301811213 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 10 mm [±0,1 mm] |
| Width | 7 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.58 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.02 kg / 19.82 N |
| Magnetic Induction ~ ? | 339.79 mT / 3398 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 product - technical parameters
Presented information constitute the result of a physical analysis. Results were calculated on models for the material Nd2Fe14B. Operational performance may deviate from the simulation results. Please consider these data as a reference point during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MPL 10x7x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3396 Gs
339.6 mT
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
warning |
| 1 mm |
2727 Gs
272.7 mT
|
1.30 kg / 2.87 LBS
1303.2 g / 12.8 N
|
safe |
| 2 mm |
2053 Gs
205.3 mT
|
0.74 kg / 1.63 LBS
738.2 g / 7.2 N
|
safe |
| 3 mm |
1502 Gs
150.2 mT
|
0.40 kg / 0.87 LBS
395.2 g / 3.9 N
|
safe |
| 5 mm |
803 Gs
80.3 mT
|
0.11 kg / 0.25 LBS
113.0 g / 1.1 N
|
safe |
| 10 mm |
216 Gs
21.6 mT
|
0.01 kg / 0.02 LBS
8.2 g / 0.1 N
|
safe |
| 15 mm |
82 Gs
8.2 mT
|
0.00 kg / 0.00 LBS
1.2 g / 0.0 N
|
safe |
| 20 mm |
39 Gs
3.9 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
safe |
| 30 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 LBS
0.0 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: Slippage capacity (wall)
MPL 10x7x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.40 kg / 0.89 LBS
404.0 g / 4.0 N
|
| 1 mm | Stal (~0.2) |
0.26 kg / 0.57 LBS
260.0 g / 2.6 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 LBS
148.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.18 LBS
80.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
22.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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: Vertical assembly (sliding) - vertical pull
MPL 10x7x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.61 kg / 1.34 LBS
606.0 g / 5.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.40 kg / 0.89 LBS
404.0 g / 4.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.20 kg / 0.45 LBS
202.0 g / 2.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.01 kg / 2.23 LBS
1010.0 g / 9.9 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 10x7x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.20 kg / 0.45 LBS
202.0 g / 2.0 N
|
| 1 mm |
|
0.51 kg / 1.11 LBS
505.0 g / 5.0 N
|
| 2 mm |
|
1.01 kg / 2.23 LBS
1010.0 g / 9.9 N
|
| 3 mm |
|
1.52 kg / 3.34 LBS
1515.0 g / 14.9 N
|
| 5 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 10 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 11 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 12 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
Table 5: Working in heat (stability) - power drop
MPL 10x7x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
OK |
| 40 °C | -2.2% |
1.98 kg / 4.36 LBS
1975.6 g / 19.4 N
|
OK |
| 60 °C | -4.4% |
1.93 kg / 4.26 LBS
1931.1 g / 18.9 N
|
|
| 80 °C | -6.6% |
1.89 kg / 4.16 LBS
1886.7 g / 18.5 N
|
|
| 100 °C | -28.8% |
1.44 kg / 3.17 LBS
1438.2 g / 14.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 10x7x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.98 kg / 10.97 LBS
4 893 Gs
|
0.75 kg / 1.65 LBS
746 g / 7.3 N
|
N/A |
| 1 mm |
4.09 kg / 9.01 LBS
6 155 Gs
|
0.61 kg / 1.35 LBS
613 g / 6.0 N
|
3.68 kg / 8.11 LBS
~0 Gs
|
| 2 mm |
3.21 kg / 7.08 LBS
5 455 Gs
|
0.48 kg / 1.06 LBS
482 g / 4.7 N
|
2.89 kg / 6.37 LBS
~0 Gs
|
| 3 mm |
2.44 kg / 5.39 LBS
4 758 Gs
|
0.37 kg / 0.81 LBS
366 g / 3.6 N
|
2.20 kg / 4.85 LBS
~0 Gs
|
| 5 mm |
1.34 kg / 2.94 LBS
3 518 Gs
|
0.20 kg / 0.44 LBS
200 g / 2.0 N
|
1.20 kg / 2.65 LBS
~0 Gs
|
| 10 mm |
0.28 kg / 0.61 LBS
1 606 Gs
|
0.04 kg / 0.09 LBS
42 g / 0.4 N
|
0.25 kg / 0.55 LBS
~0 Gs
|
| 20 mm |
0.02 kg / 0.04 LBS
433 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
43 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
26 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
17 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: Protective zones (electronics) - precautionary measures
MPL 10x7x3 / 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) | 3.0 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) | 1.0 cm |
Table 8: Collisions (cracking risk) - collision effects
MPL 10x7x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
36.15 km/h
(10.04 m/s)
|
0.08 J | |
| 30 mm |
62.46 km/h
(17.35 m/s)
|
0.24 J | |
| 50 mm |
80.63 km/h
(22.40 m/s)
|
0.40 J | |
| 100 mm |
114.03 km/h
(31.68 m/s)
|
0.79 J |
Table 9: Anti-corrosion coating durability
MPL 10x7x3 / 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 (Flux)
MPL 10x7x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 480 Mx | 24.8 µWb |
| Pc Coefficient | 0.42 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 10x7x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.02 kg | Standard |
| Water (riverbed) |
2.31 kg
(+0.29 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Thermal stability
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths as well as weaknesses of Nd2Fe14B magnets.
Strengths
- Their magnetic field is maintained, and after around 10 years it decreases only by ~1% (theoretically),
- Neodymium magnets prove to be extremely resistant to loss of magnetic properties caused by external magnetic fields,
- A magnet with a metallic silver surface looks better,
- Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
- Considering the option of accurate molding and adaptation to specialized requirements, neodymium magnets can be manufactured in a variety of shapes and sizes, which amplifies use scope,
- Universal use in high-tech industry – they are utilized in HDD drives, electric motors, advanced medical instruments, also other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
- With large orders the cost of neodymium magnets is a challenge,
Holding force characteristics
Maximum holding power of the magnet – what affects it?
- on a base made of mild steel, perfectly concentrating the magnetic field
- whose thickness is min. 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Clearance – the presence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of nominal force).
- Steel thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped into the air.
- Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
- Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.
Safe handling of neodymium magnets
Physical harm
Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Machining danger
Dust produced during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Magnets are brittle
Neodymium magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets leads to them shattering into shards.
Handling rules
Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Demagnetization risk
Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. Damage is permanent.
ICD Warning
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
GPS and phone interference
An intense magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.
Data carriers
Intense magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.
Danger to the youngest
Always store magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.
Warning for allergy sufferers
Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, cease working with magnets and wear gloves.
