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 details - 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
These values constitute the result of a engineering simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world conditions might slightly differ. Use these calculations as a preliminary roadmap for designers.
Table 1: Static force (pull vs gap) - interaction chart
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
|
medium risk |
| 1 mm |
2727 Gs
272.7 mT
|
1.30 kg / 2.87 pounds
1303.2 g / 12.8 N
|
low risk |
| 2 mm |
2053 Gs
205.3 mT
|
0.74 kg / 1.63 pounds
738.2 g / 7.2 N
|
low risk |
| 3 mm |
1502 Gs
150.2 mT
|
0.40 kg / 0.87 pounds
395.2 g / 3.9 N
|
low risk |
| 5 mm |
803 Gs
80.3 mT
|
0.11 kg / 0.25 pounds
113.0 g / 1.1 N
|
low risk |
| 10 mm |
216 Gs
21.6 mT
|
0.01 kg / 0.02 pounds
8.2 g / 0.1 N
|
low risk |
| 15 mm |
82 Gs
8.2 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
low risk |
| 20 mm |
39 Gs
3.9 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
low risk |
| 30 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding load (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 (shearing) - 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 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: Steel thickness (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 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: 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 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 (repulsion) - forces in the system
MPL 10x7x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding 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 |
| Timepiece | 20 Gs (2.0 mT) | 3.0 cm |
| Phone / Smartphone | 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) - 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: Coating parameters (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. Shear force
*Caution: On a vertical wall, the magnet holds just ~20% of its max power.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Thermal stability
*For N38 grade, 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages and disadvantages of rare earth magnets.
Pros
- They retain attractive force for almost 10 years – the drop is just ~1% (according to analyses),
- Neodymium magnets are distinguished by highly resistant to loss of magnetic properties caused by external interference,
- The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Magnets possess very high magnetic induction on the working surface,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- In view of the ability of free molding and adaptation to custom requirements, neodymium magnets can be modeled in a variety of shapes and sizes, which increases their versatility,
- Universal use in innovative solutions – they are commonly used in data components, electric motors, medical devices, also complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Cons
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of producing threads in the magnet and complex shapes - recommended is casing - mounting mechanism.
- Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these devices can be problematic in diagnostics medical after entering the body.
- Due to expensive raw materials, their price is higher than average,
Holding force characteristics
Maximum holding power of the magnet – what affects it?
- using a base made of mild steel, serving as a circuit closing element
- whose transverse dimension is min. 10 mm
- characterized by even structure
- without any clearance between the magnet and steel
- under perpendicular application of breakaway force (90-degree angle)
- at temperature room level
Impact of factors on magnetic holding capacity in practice
- Clearance – the presence of any layer (paint, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Plate thickness – too thin steel does not close the flux, causing part of the power to be wasted to the other side.
- Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
- Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Hand protection
Risk of injury: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Use thick gloves.
Handling rules
Be careful. Neodymium magnets attract from a distance and snap with massive power, often faster than you can react.
Threat to electronics
Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).
Swallowing risk
Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep away from kids and pets.
Power loss in heat
Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.
Protective goggles
NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into shards.
Fire warning
Powder generated during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Avoid contact if allergic
Some people suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Frequent touching may cause a rash. We recommend wear safety gloves.
Health Danger
Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Compass and GPS
Remember: rare earth magnets generate a field that interferes with precision electronics. Maintain a safe distance from your phone, device, and GPS.
