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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Technical - 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 |
Engineering modeling of the magnet - data
The following values represent the direct effect of a engineering analysis. Values were calculated on models for the class Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.
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 pounds
2020.0 g / 19.8 N
|
warning |
| 1 mm |
2727 Gs
272.7 mT
|
1.30 kg / 2.87 pounds
1303.2 g / 12.8 N
|
weak grip |
| 2 mm |
2053 Gs
205.3 mT
|
0.74 kg / 1.63 pounds
738.2 g / 7.2 N
|
weak grip |
| 3 mm |
1502 Gs
150.2 mT
|
0.40 kg / 0.87 pounds
395.2 g / 3.9 N
|
weak grip |
| 5 mm |
803 Gs
80.3 mT
|
0.11 kg / 0.25 pounds
113.0 g / 1.1 N
|
weak grip |
| 10 mm |
216 Gs
21.6 mT
|
0.01 kg / 0.02 pounds
8.2 g / 0.1 N
|
weak grip |
| 15 mm |
82 Gs
8.2 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
weak grip |
| 20 mm |
39 Gs
3.9 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
weak grip |
| 30 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 pounds
0.0 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 hold (vertical surface)
MPL 10x7x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.40 kg / 0.89 pounds
404.0 g / 4.0 N
|
| 1 mm | Stal (~0.2) |
0.26 kg / 0.57 pounds
260.0 g / 2.6 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
22.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
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 pounds
606.0 g / 5.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.40 kg / 0.89 pounds
404.0 g / 4.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.20 kg / 0.45 pounds
202.0 g / 2.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.01 kg / 2.23 pounds
1010.0 g / 9.9 N
|
Table 4: Material efficiency (saturation) - power losses
MPL 10x7x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.20 kg / 0.45 pounds
202.0 g / 2.0 N
|
| 1 mm |
|
0.51 kg / 1.11 pounds
505.0 g / 5.0 N
|
| 2 mm |
|
1.01 kg / 2.23 pounds
1010.0 g / 9.9 N
|
| 3 mm |
|
1.52 kg / 3.34 pounds
1515.0 g / 14.9 N
|
| 5 mm |
|
2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
|
| 10 mm |
|
2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
|
| 11 mm |
|
2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
|
| 12 mm |
|
2.02 kg / 4.45 pounds
2020.0 g / 19.8 N
|
Table 5: Thermal resistance (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 pounds
2020.0 g / 19.8 N
|
OK |
| 40 °C | -2.2% |
1.98 kg / 4.36 pounds
1975.6 g / 19.4 N
|
OK |
| 60 °C | -4.4% |
1.93 kg / 4.26 pounds
1931.1 g / 18.9 N
|
|
| 80 °C | -6.6% |
1.89 kg / 4.16 pounds
1886.7 g / 18.5 N
|
|
| 100 °C | -28.8% |
1.44 kg / 3.17 pounds
1438.2 g / 14.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 10x7x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.98 kg / 10.97 pounds
4 893 Gs
|
0.75 kg / 1.65 pounds
746 g / 7.3 N
|
N/A |
| 1 mm |
4.09 kg / 9.01 pounds
6 155 Gs
|
0.61 kg / 1.35 pounds
613 g / 6.0 N
|
3.68 kg / 8.11 pounds
~0 Gs
|
| 2 mm |
3.21 kg / 7.08 pounds
5 455 Gs
|
0.48 kg / 1.06 pounds
482 g / 4.7 N
|
2.89 kg / 6.37 pounds
~0 Gs
|
| 3 mm |
2.44 kg / 5.39 pounds
4 758 Gs
|
0.37 kg / 0.81 pounds
366 g / 3.6 N
|
2.20 kg / 4.85 pounds
~0 Gs
|
| 5 mm |
1.34 kg / 2.94 pounds
3 518 Gs
|
0.20 kg / 0.44 pounds
200 g / 2.0 N
|
1.20 kg / 2.65 pounds
~0 Gs
|
| 10 mm |
0.28 kg / 0.61 pounds
1 606 Gs
|
0.04 kg / 0.09 pounds
42 g / 0.4 N
|
0.25 kg / 0.55 pounds
~0 Gs
|
| 20 mm |
0.02 kg / 0.04 pounds
433 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
43 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
26 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
17 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: Hazards (electronics) - warnings
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 |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 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) - warning
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: Electrical 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: Hydrostatics and buoyancy
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. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains merely a fraction of its nominal pull.
2. Plate thickness effect
*Thin steel (e.g. computer case) severely reduces the holding force.
3. Temperature resistance
*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) = 0.42
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% |
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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Strengths as well as weaknesses of Nd2Fe14B magnets.
Advantages
- They do not lose power, even after around 10 years – the reduction in lifting capacity is only ~1% (theoretically),
- They are resistant to demagnetization induced by external magnetic fields,
- In other words, due to the smooth surface of silver, the element becomes visually attractive,
- They show high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to freedom in shaping and the ability to adapt to complex applications,
- Key role in modern technologies – they are used in HDD drives, motor assemblies, precision medical tools, also technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 secure oxidation and corrosion.
- We suggest a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what contributes to it?
- using a base made of mild steel, serving as a circuit closing element
- with a thickness no less than 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (metal-to-metal)
- under vertical application of breakaway force (90-degree angle)
- in stable room temperature
Key elements affecting lifting force
- Clearance – existence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the power to be wasted into the air.
- Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
- Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
- Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Safe handling of neodymium magnets
Handling rules
Use magnets with awareness. Their powerful strength can shock even experienced users. Plan your moves and respect their power.
Sensitization to coating
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness happens, immediately stop handling magnets and wear gloves.
Pacemakers
For implant holders: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.
Do not drill into magnets
Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.
Threat to electronics
Data protection: Strong magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).
Keep away from children
These products are not intended for children. Swallowing a few magnets can lead to them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.
Eye protection
Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.
GPS Danger
A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a device to avoid damaging the sensors.
Pinching danger
Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Operating temperature
Do not overheat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
