MPL 40x40x15 / N38 - lamellar magnet
lamellar magnet
Catalog no 020161
GTIN/EAN: 5906301811671
length
40 mm [±0,1 mm]
Width
40 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
180 g
Magnetization Direction
↑ axial
Load capacity
46.94 kg / 460.51 N
Magnetic Induction
345.80 mT / 3458 Gs
Coating
[NiCuNi] Nickel
55.37 ZŁ with VAT / pcs + price for transport
45.02 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 22 499 98 98
if you prefer contact us by means of
contact form
the contact page.
Lifting power along with form of magnetic components can be calculated with our
magnetic calculator.
Same-day shipping for orders placed before 14:00.
Technical data of the product - MPL 40x40x15 / N38 - lamellar magnet
Specification / characteristics - MPL 40x40x15 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020161 |
| GTIN/EAN | 5906301811671 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 40 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 180 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 46.94 kg / 460.51 N |
| Magnetic Induction ~ ? | 345.80 mT / 3458 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 product - data
Presented information are the outcome of a engineering calculation. Values are based on models for the class Nd2Fe14B. Actual performance may differ. Please consider these data as a preliminary roadmap for designers.
Table 1: Static force (force vs distance) - characteristics
MPL 40x40x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3458 Gs
345.8 mT
|
46.94 kg / 103.48 lbs
46940.0 g / 460.5 N
|
critical level |
| 1 mm |
3333 Gs
333.3 mT
|
43.62 kg / 96.16 lbs
43616.1 g / 427.9 N
|
critical level |
| 2 mm |
3199 Gs
319.9 mT
|
40.19 kg / 88.60 lbs
40189.1 g / 394.3 N
|
critical level |
| 3 mm |
3060 Gs
306.0 mT
|
36.77 kg / 81.06 lbs
36767.3 g / 360.7 N
|
critical level |
| 5 mm |
2773 Gs
277.3 mT
|
30.19 kg / 66.55 lbs
30187.9 g / 296.1 N
|
critical level |
| 10 mm |
2078 Gs
207.8 mT
|
16.95 kg / 37.37 lbs
16950.2 g / 166.3 N
|
critical level |
| 15 mm |
1507 Gs
150.7 mT
|
8.91 kg / 19.65 lbs
8913.7 g / 87.4 N
|
strong |
| 20 mm |
1085 Gs
108.5 mT
|
4.62 kg / 10.19 lbs
4622.3 g / 45.3 N
|
strong |
| 30 mm |
580 Gs
58.0 mT
|
1.32 kg / 2.92 lbs
1322.9 g / 13.0 N
|
weak grip |
| 50 mm |
204 Gs
20.4 mT
|
0.16 kg / 0.36 lbs
164.0 g / 1.6 N
|
weak grip |
Table 2: Vertical capacity (vertical surface)
MPL 40x40x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
9.39 kg / 20.70 lbs
9388.0 g / 92.1 N
|
| 1 mm | Stal (~0.2) |
8.72 kg / 19.23 lbs
8724.0 g / 85.6 N
|
| 2 mm | Stal (~0.2) |
8.04 kg / 17.72 lbs
8038.0 g / 78.9 N
|
| 3 mm | Stal (~0.2) |
7.35 kg / 16.21 lbs
7354.0 g / 72.1 N
|
| 5 mm | Stal (~0.2) |
6.04 kg / 13.31 lbs
6038.0 g / 59.2 N
|
| 10 mm | Stal (~0.2) |
3.39 kg / 7.47 lbs
3390.0 g / 33.3 N
|
| 15 mm | Stal (~0.2) |
1.78 kg / 3.93 lbs
1782.0 g / 17.5 N
|
| 20 mm | Stal (~0.2) |
0.92 kg / 2.04 lbs
924.0 g / 9.1 N
|
| 30 mm | Stal (~0.2) |
0.26 kg / 0.58 lbs
264.0 g / 2.6 N
|
| 50 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
|
Table 3: Wall mounting (shearing) - vertical pull
MPL 40x40x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
14.08 kg / 31.05 lbs
14082.0 g / 138.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
9.39 kg / 20.70 lbs
9388.0 g / 92.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.69 kg / 10.35 lbs
4694.0 g / 46.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
23.47 kg / 51.74 lbs
23470.0 g / 230.2 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 40x40x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.35 kg / 5.17 lbs
2347.0 g / 23.0 N
|
| 1 mm |
|
5.87 kg / 12.94 lbs
5867.5 g / 57.6 N
|
| 2 mm |
|
11.74 kg / 25.87 lbs
11735.0 g / 115.1 N
|
| 3 mm |
|
17.60 kg / 38.81 lbs
17602.5 g / 172.7 N
|
| 5 mm |
|
29.34 kg / 64.68 lbs
29337.5 g / 287.8 N
|
| 10 mm |
|
46.94 kg / 103.48 lbs
46940.0 g / 460.5 N
|
| 11 mm |
|
46.94 kg / 103.48 lbs
46940.0 g / 460.5 N
|
| 12 mm |
|
46.94 kg / 103.48 lbs
46940.0 g / 460.5 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 40x40x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
46.94 kg / 103.48 lbs
46940.0 g / 460.5 N
|
OK |
| 40 °C | -2.2% |
45.91 kg / 101.21 lbs
45907.3 g / 450.4 N
|
OK |
| 60 °C | -4.4% |
44.87 kg / 98.93 lbs
44874.6 g / 440.2 N
|
|
| 80 °C | -6.6% |
43.84 kg / 96.65 lbs
43842.0 g / 430.1 N
|
|
| 100 °C | -28.8% |
33.42 kg / 73.68 lbs
33421.3 g / 327.9 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 40x40x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
117.92 kg / 259.97 lbs
4 963 Gs
|
17.69 kg / 39.00 lbs
17688 g / 173.5 N
|
N/A |
| 1 mm |
113.82 kg / 250.94 lbs
6 794 Gs
|
17.07 kg / 37.64 lbs
17074 g / 167.5 N
|
102.44 kg / 225.84 lbs
~0 Gs
|
| 2 mm |
109.57 kg / 241.57 lbs
6 666 Gs
|
16.44 kg / 36.23 lbs
16436 g / 161.2 N
|
98.62 kg / 217.41 lbs
~0 Gs
|
| 3 mm |
105.28 kg / 232.10 lbs
6 534 Gs
|
15.79 kg / 34.81 lbs
15792 g / 154.9 N
|
94.75 kg / 208.89 lbs
~0 Gs
|
| 5 mm |
96.65 kg / 213.08 lbs
6 261 Gs
|
14.50 kg / 31.96 lbs
14498 g / 142.2 N
|
86.99 kg / 191.77 lbs
~0 Gs
|
| 10 mm |
75.84 kg / 167.19 lbs
5 546 Gs
|
11.38 kg / 25.08 lbs
11376 g / 111.6 N
|
68.25 kg / 150.47 lbs
~0 Gs
|
| 20 mm |
42.58 kg / 93.88 lbs
4 155 Gs
|
6.39 kg / 14.08 lbs
6387 g / 62.7 N
|
38.32 kg / 84.49 lbs
~0 Gs
|
| 50 mm |
6.12 kg / 13.49 lbs
1 575 Gs
|
0.92 kg / 2.02 lbs
918 g / 9.0 N
|
5.51 kg / 12.14 lbs
~0 Gs
|
| 60 mm |
3.32 kg / 7.33 lbs
1 161 Gs
|
0.50 kg / 1.10 lbs
499 g / 4.9 N
|
2.99 kg / 6.59 lbs
~0 Gs
|
| 70 mm |
1.87 kg / 4.12 lbs
871 Gs
|
0.28 kg / 0.62 lbs
281 g / 2.8 N
|
1.68 kg / 3.71 lbs
~0 Gs
|
| 80 mm |
1.09 kg / 2.41 lbs
665 Gs
|
0.16 kg / 0.36 lbs
164 g / 1.6 N
|
0.98 kg / 2.17 lbs
~0 Gs
|
| 90 mm |
0.66 kg / 1.46 lbs
517 Gs
|
0.10 kg / 0.22 lbs
99 g / 1.0 N
|
0.59 kg / 1.31 lbs
~0 Gs
|
| 100 mm |
0.41 kg / 0.91 lbs
409 Gs
|
0.06 kg / 0.14 lbs
62 g / 0.6 N
|
0.37 kg / 0.82 lbs
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x40x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 20.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 16.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 12.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 10.0 cm |
| Remote | 50 Gs (5.0 mT) | 9.0 cm |
| Payment card | 400 Gs (40.0 mT) | 4.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Collisions (cracking risk) - collision effects
MPL 40x40x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.62 km/h
(5.45 m/s)
|
2.67 J | |
| 30 mm |
28.70 km/h
(7.97 m/s)
|
5.72 J | |
| 50 mm |
36.50 km/h
(10.14 m/s)
|
9.25 J | |
| 100 mm |
51.50 km/h
(14.31 m/s)
|
18.42 J |
Table 9: Corrosion resistance
MPL 40x40x15 / 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 40x40x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 58 107 Mx | 581.1 µWb |
| Pc Coefficient | 0.43 | Low (Flat) |
Table 11: Submerged application
MPL 40x40x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 46.94 kg | Standard |
| Water (riverbed) |
53.75 kg
(+6.81 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical wall, the magnet holds just ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) severely reduces 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) = 0.43
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.
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
Pros as well as cons of Nd2Fe14B magnets.
Benefits
- They do not lose power, even after nearly 10 years – the reduction in power is only ~1% (according to tests),
- Neodymium magnets are extremely resistant to magnetic field loss caused by magnetic disturbances,
- By applying a shiny layer of gold, the element acquires an proper look,
- They show high magnetic induction at the operating surface, making them more effective,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Possibility of custom shaping and modifying to concrete applications,
- Fundamental importance in future technologies – they are used in magnetic memories, electromotive mechanisms, medical devices, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in miniature devices
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We suggest casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can complicate diagnosis medical in case of swallowing.
- Due to expensive raw materials, their price is higher than average,
Holding force characteristics
Best holding force of the magnet in ideal parameters – what contributes to it?
- with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
- whose transverse dimension is min. 10 mm
- with an ideally smooth touching surface
- without any clearance between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at ambient temperature room level
Impact of factors on magnetic holding capacity in practice
- Distance (betwixt the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin sheet causes magnetic saturation, causing part of the flux to be escaped into the air.
- Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and holding force.
- Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.
Lifting capacity was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Safety rules for work with neodymium magnets
Choking Hazard
Always store magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are life-threatening.
Phone sensors
Note: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your phone, tablet, and navigation systems.
Demagnetization risk
Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.
Protective goggles
Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Flammability
Powder generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
ICD Warning
Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to handle the magnets.
Skin irritation risks
Some people have a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact may cause an allergic reaction. We strongly advise wear safety gloves.
Electronic devices
Do not bring magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.
Crushing risk
Big blocks can smash fingers instantly. Under no circumstances put your hand between two attracting surfaces.
Powerful field
Be careful. Neodymium magnets attract from a distance and connect with massive power, often quicker than you can move away.
