MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet
lamellar magnet
Catalog no 020397
GTIN/EAN: 5906301811909
length
40 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
15 g
Magnetization Direction
↑ axial
Load capacity
11.85 kg / 116.27 N
Magnetic Induction
321.37 mT / 3214 Gs
Coating
[NiCuNi] Nickel
9.93 ZŁ with VAT / pcs + price for transport
8.07 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical parameters of the product - MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet
Specification / characteristics - MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020397 |
| GTIN/EAN | 5906301811909 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 15 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 11.85 kg / 116.27 N |
| Magnetic Induction ~ ? | 321.37 mT / 3214 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 simulation of the magnet - data
Presented information are the result of a mathematical analysis. Values were calculated on models for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these data as a supplementary guide when designing systems.
Table 1: Static force (force vs distance) - interaction chart
MPL 40x10x5x2[7/3.5] / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3212 Gs
321.2 mT
|
11.85 kg / 26.12 LBS
11850.0 g / 116.2 N
|
critical level |
| 1 mm |
2791 Gs
279.1 mT
|
8.95 kg / 19.73 LBS
8947.7 g / 87.8 N
|
warning |
| 2 mm |
2358 Gs
235.8 mT
|
6.38 kg / 14.08 LBS
6384.9 g / 62.6 N
|
warning |
| 3 mm |
1965 Gs
196.5 mT
|
4.43 kg / 9.77 LBS
4432.4 g / 43.5 N
|
warning |
| 5 mm |
1360 Gs
136.0 mT
|
2.12 kg / 4.68 LBS
2122.9 g / 20.8 N
|
warning |
| 10 mm |
615 Gs
61.5 mT
|
0.43 kg / 0.96 LBS
434.1 g / 4.3 N
|
safe |
| 15 mm |
329 Gs
32.9 mT
|
0.12 kg / 0.27 LBS
124.5 g / 1.2 N
|
safe |
| 20 mm |
195 Gs
19.5 mT
|
0.04 kg / 0.10 LBS
43.9 g / 0.4 N
|
safe |
| 30 mm |
83 Gs
8.3 mT
|
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
safe |
| 50 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 LBS
0.6 g / 0.0 N
|
safe |
Table 2: Vertical load (wall)
MPL 40x10x5x2[7/3.5] / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.37 kg / 5.22 LBS
2370.0 g / 23.2 N
|
| 1 mm | Stal (~0.2) |
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
| 2 mm | Stal (~0.2) |
1.28 kg / 2.81 LBS
1276.0 g / 12.5 N
|
| 3 mm | Stal (~0.2) |
0.89 kg / 1.95 LBS
886.0 g / 8.7 N
|
| 5 mm | Stal (~0.2) |
0.42 kg / 0.93 LBS
424.0 g / 4.2 N
|
| 10 mm | Stal (~0.2) |
0.09 kg / 0.19 LBS
86.0 g / 0.8 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
24.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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 40x10x5x2[7/3.5] / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
3.55 kg / 7.84 LBS
3555.0 g / 34.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.37 kg / 5.22 LBS
2370.0 g / 23.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.19 kg / 2.61 LBS
1185.0 g / 11.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
5.93 kg / 13.06 LBS
5925.0 g / 58.1 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 40x10x5x2[7/3.5] / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.59 kg / 1.31 LBS
592.5 g / 5.8 N
|
| 1 mm |
|
1.48 kg / 3.27 LBS
1481.3 g / 14.5 N
|
| 2 mm |
|
2.96 kg / 6.53 LBS
2962.5 g / 29.1 N
|
| 3 mm |
|
4.44 kg / 9.80 LBS
4443.8 g / 43.6 N
|
| 5 mm |
|
7.41 kg / 16.33 LBS
7406.3 g / 72.7 N
|
| 10 mm |
|
11.85 kg / 26.12 LBS
11850.0 g / 116.2 N
|
| 11 mm |
|
11.85 kg / 26.12 LBS
11850.0 g / 116.2 N
|
| 12 mm |
|
11.85 kg / 26.12 LBS
11850.0 g / 116.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 40x10x5x2[7/3.5] / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
11.85 kg / 26.12 LBS
11850.0 g / 116.2 N
|
OK |
| 40 °C | -2.2% |
11.59 kg / 25.55 LBS
11589.3 g / 113.7 N
|
OK |
| 60 °C | -4.4% |
11.33 kg / 24.98 LBS
11328.6 g / 111.1 N
|
|
| 80 °C | -6.6% |
11.07 kg / 24.40 LBS
11067.9 g / 108.6 N
|
|
| 100 °C | -28.8% |
8.44 kg / 18.60 LBS
8437.2 g / 82.8 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 40x10x5x2[7/3.5] / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
25.44 kg / 56.10 LBS
4 569 Gs
|
3.82 kg / 8.41 LBS
3817 g / 37.4 N
|
N/A |
| 1 mm |
22.33 kg / 49.22 LBS
6 018 Gs
|
3.35 kg / 7.38 LBS
3349 g / 32.9 N
|
20.09 kg / 44.30 LBS
~0 Gs
|
| 2 mm |
19.21 kg / 42.36 LBS
5 582 Gs
|
2.88 kg / 6.35 LBS
2882 g / 28.3 N
|
17.29 kg / 38.12 LBS
~0 Gs
|
| 3 mm |
16.31 kg / 35.96 LBS
5 144 Gs
|
2.45 kg / 5.39 LBS
2447 g / 24.0 N
|
14.68 kg / 32.36 LBS
~0 Gs
|
| 5 mm |
11.45 kg / 25.23 LBS
4 309 Gs
|
1.72 kg / 3.78 LBS
1717 g / 16.8 N
|
10.30 kg / 22.71 LBS
~0 Gs
|
| 10 mm |
4.56 kg / 10.05 LBS
2 719 Gs
|
0.68 kg / 1.51 LBS
684 g / 6.7 N
|
4.10 kg / 9.04 LBS
~0 Gs
|
| 20 mm |
0.93 kg / 2.05 LBS
1 230 Gs
|
0.14 kg / 0.31 LBS
140 g / 1.4 N
|
0.84 kg / 1.85 LBS
~0 Gs
|
| 50 mm |
0.04 kg / 0.08 LBS
249 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.03 kg / 0.08 LBS
~0 Gs
|
| 60 mm |
0.02 kg / 0.04 LBS
167 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.03 LBS
~0 Gs
|
| 70 mm |
0.01 kg / 0.02 LBS
116 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.01 LBS
84 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 LBS
62 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
48 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
MPL 40x10x5x2[7/3.5] / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Remote | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MPL 40x10x5x2[7/3.5] / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.99 km/h
(8.05 m/s)
|
0.49 J | |
| 30 mm |
49.12 km/h
(13.64 m/s)
|
1.40 J | |
| 50 mm |
63.39 km/h
(17.61 m/s)
|
2.33 J | |
| 100 mm |
89.64 km/h
(24.90 m/s)
|
4.65 J |
Table 9: Coating parameters (durability)
MPL 40x10x5x2[7/3.5] / 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 40x10x5x2[7/3.5] / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 11 419 Mx | 114.2 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 40x10x5x2[7/3.5] / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 11.85 kg | Standard |
| Water (riverbed) |
13.57 kg
(+1.72 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical surface, the magnet retains only a fraction of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*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) = 0.31
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 |
Other deals
Pros as well as cons of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
- Neodymium magnets prove to be highly resistant to demagnetization caused by external magnetic fields,
- Thanks to the elegant finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
- The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
- Considering the possibility of precise shaping and customization to specialized projects, NdFeB magnets can be created in a broad palette of geometric configurations, which amplifies use scope,
- Significant place in innovative solutions – they are used in mass storage devices, electric drive systems, medical devices, and technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
- Neodymium magnets lose their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Limited ability of making threads in the magnet and complicated forms - preferred is casing - mounting mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to complicate diagnosis medical after entering the body.
- Due to complex production process, their price is higher than average,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what affects it?
- using a base made of mild steel, serving as a circuit closing element
- with a cross-section no less than 10 mm
- with an ground contact surface
- without the slightest clearance between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at temperature approx. 20 degrees Celsius
Determinants of lifting force in real conditions
- Space between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Protect data
Avoid bringing magnets near a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.
Allergic reactions
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, cease working with magnets and use protective gear.
Powerful field
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Shattering risk
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
Physical harm
Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying anything in their path. Be careful!
GPS and phone interference
An intense magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a device to avoid damaging the sensors.
Medical implants
Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Dust explosion hazard
Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.
Keep away from children
Absolutely store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are fatal.
Thermal limits
Keep cool. NdFeB magnets are susceptible to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
