MPL 40x10x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020152
GTIN/EAN: 5906301811589
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
6.03 ZŁ with VAT / pcs + price for transport
4.90 ZŁ net + 23% VAT / pcs
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Technical data - MPL 40x10x5 / N38 - lamellar magnet
Specification / characteristics - MPL 40x10x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020152 |
| GTIN/EAN | 5906301811589 |
| 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 |
Physical modeling of the product - report
These information are the outcome of a mathematical simulation. Values are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point when designing systems.
Table 1: Static pull force (force vs distance) - power drop
MPL 40x10x5 / 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
|
dangerous! |
| 1 mm |
2791 Gs
279.1 mT
|
8.95 kg / 19.73 lbs
8947.7 g / 87.8 N
|
medium risk |
| 2 mm |
2358 Gs
235.8 mT
|
6.38 kg / 14.08 lbs
6384.9 g / 62.6 N
|
medium risk |
| 3 mm |
1965 Gs
196.5 mT
|
4.43 kg / 9.77 lbs
4432.4 g / 43.5 N
|
medium risk |
| 5 mm |
1360 Gs
136.0 mT
|
2.12 kg / 4.68 lbs
2122.9 g / 20.8 N
|
medium risk |
| 10 mm |
615 Gs
61.5 mT
|
0.43 kg / 0.96 lbs
434.1 g / 4.3 N
|
low risk |
| 15 mm |
329 Gs
32.9 mT
|
0.12 kg / 0.27 lbs
124.5 g / 1.2 N
|
low risk |
| 20 mm |
195 Gs
19.5 mT
|
0.04 kg / 0.10 lbs
43.9 g / 0.4 N
|
low risk |
| 30 mm |
83 Gs
8.3 mT
|
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
low risk |
| 50 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 lbs
0.6 g / 0.0 N
|
low risk |
Table 2: Vertical force (vertical surface)
MPL 40x10x5 / 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: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x10x5 / 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 (saturation) - sheet metal selection
MPL 40x10x5 / 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: Working in heat (material behavior) - thermal limit
MPL 40x10x5 / 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 (repulsion) - field range
MPL 40x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Safety (HSE) (electronics) - precautionary measures
MPL 40x10x5 / 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 |
| Mechanical watch | 20 Gs (2.0 mT) | 5.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Car key | 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: Collisions (kinetic energy) - warning
MPL 40x10x5 / 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: Anti-corrosion coating durability
MPL 40x10x5 / 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 (Pc)
MPL 40x10x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 11 419 Mx | 114.2 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 40x10x5 / 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. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains just ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Power loss vs temp
*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) = 0.31
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.
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 |
See also proposals
Strengths and weaknesses of neodymium magnets.
Advantages
- They do not lose magnetism, even during nearly ten years – the reduction in power is only ~1% (according to tests),
- They maintain their magnetic properties even under close interference source,
- By using a decorative layer of nickel, the element gains an nice look,
- The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
- In view of the potential of precise forming and customization to specialized solutions, neodymium magnets can be created in a broad palette of geometric configurations, which increases their versatility,
- Wide application in modern industrial fields – they find application in hard drives, brushless drives, medical devices, and modern systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Disadvantages
- To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its 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. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that small components of these products are able to complicate diagnosis medical after entering the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum lifting force for a neodymium magnet – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic flux
- whose transverse dimension is min. 10 mm
- with an ground touching surface
- under conditions of gap-free contact (surface-to-surface)
- under vertical force direction (90-degree angle)
- in stable room temperature
Determinants of practical lifting force of a magnet
- Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Caution required
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Fragile material
Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.
Adults only
Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.
Bodily injuries
Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Danger to pacemakers
For implant holders: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.
Protect data
Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.
Precision electronics
GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.
Flammability
Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.
Operating temperature
Do not overheat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Nickel allergy
Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.
