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
bulk discounts:
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Technical details - 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 |
Engineering modeling of the product - data
The following data represent the result of a physical analysis. Values rely on models for the material Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Treat these calculations as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - 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 pounds
11850.0 g / 116.2 N
|
crushing |
| 1 mm |
2791 Gs
279.1 mT
|
8.95 kg / 19.73 pounds
8947.7 g / 87.8 N
|
medium risk |
| 2 mm |
2358 Gs
235.8 mT
|
6.38 kg / 14.08 pounds
6384.9 g / 62.6 N
|
medium risk |
| 3 mm |
1965 Gs
196.5 mT
|
4.43 kg / 9.77 pounds
4432.4 g / 43.5 N
|
medium risk |
| 5 mm |
1360 Gs
136.0 mT
|
2.12 kg / 4.68 pounds
2122.9 g / 20.8 N
|
medium risk |
| 10 mm |
615 Gs
61.5 mT
|
0.43 kg / 0.96 pounds
434.1 g / 4.3 N
|
low risk |
| 15 mm |
329 Gs
32.9 mT
|
0.12 kg / 0.27 pounds
124.5 g / 1.2 N
|
low risk |
| 20 mm |
195 Gs
19.5 mT
|
0.04 kg / 0.10 pounds
43.9 g / 0.4 N
|
low risk |
| 30 mm |
83 Gs
8.3 mT
|
0.01 kg / 0.02 pounds
8.0 g / 0.1 N
|
low risk |
| 50 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 pounds
0.6 g / 0.0 N
|
low risk |
Table 2: Vertical capacity (wall)
MPL 40x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.37 kg / 5.22 pounds
2370.0 g / 23.2 N
|
| 1 mm | Stal (~0.2) |
1.79 kg / 3.95 pounds
1790.0 g / 17.6 N
|
| 2 mm | Stal (~0.2) |
1.28 kg / 2.81 pounds
1276.0 g / 12.5 N
|
| 3 mm | Stal (~0.2) |
0.89 kg / 1.95 pounds
886.0 g / 8.7 N
|
| 5 mm | Stal (~0.2) |
0.42 kg / 0.93 pounds
424.0 g / 4.2 N
|
| 10 mm | Stal (~0.2) |
0.09 kg / 0.19 pounds
86.0 g / 0.8 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
24.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
8.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - 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 pounds
3555.0 g / 34.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.37 kg / 5.22 pounds
2370.0 g / 23.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.19 kg / 2.61 pounds
1185.0 g / 11.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
5.93 kg / 13.06 pounds
5925.0 g / 58.1 N
|
Table 4: Steel thickness (saturation) - power losses
MPL 40x10x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.59 kg / 1.31 pounds
592.5 g / 5.8 N
|
| 1 mm |
|
1.48 kg / 3.27 pounds
1481.3 g / 14.5 N
|
| 2 mm |
|
2.96 kg / 6.53 pounds
2962.5 g / 29.1 N
|
| 3 mm |
|
4.44 kg / 9.80 pounds
4443.8 g / 43.6 N
|
| 5 mm |
|
7.41 kg / 16.33 pounds
7406.3 g / 72.7 N
|
| 10 mm |
|
11.85 kg / 26.12 pounds
11850.0 g / 116.2 N
|
| 11 mm |
|
11.85 kg / 26.12 pounds
11850.0 g / 116.2 N
|
| 12 mm |
|
11.85 kg / 26.12 pounds
11850.0 g / 116.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 40x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
11.85 kg / 26.12 pounds
11850.0 g / 116.2 N
|
OK |
| 40 °C | -2.2% |
11.59 kg / 25.55 pounds
11589.3 g / 113.7 N
|
OK |
| 60 °C | -4.4% |
11.33 kg / 24.98 pounds
11328.6 g / 111.1 N
|
|
| 80 °C | -6.6% |
11.07 kg / 24.40 pounds
11067.9 g / 108.6 N
|
|
| 100 °C | -28.8% |
8.44 kg / 18.60 pounds
8437.2 g / 82.8 N
|
Table 6: Two magnets (attraction) - field range
MPL 40x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
25.44 kg / 56.10 pounds
4 569 Gs
|
3.82 kg / 8.41 pounds
3817 g / 37.4 N
|
N/A |
| 1 mm |
22.33 kg / 49.22 pounds
6 018 Gs
|
3.35 kg / 7.38 pounds
3349 g / 32.9 N
|
20.09 kg / 44.30 pounds
~0 Gs
|
| 2 mm |
19.21 kg / 42.36 pounds
5 582 Gs
|
2.88 kg / 6.35 pounds
2882 g / 28.3 N
|
17.29 kg / 38.12 pounds
~0 Gs
|
| 3 mm |
16.31 kg / 35.96 pounds
5 144 Gs
|
2.45 kg / 5.39 pounds
2447 g / 24.0 N
|
14.68 kg / 32.36 pounds
~0 Gs
|
| 5 mm |
11.45 kg / 25.23 pounds
4 309 Gs
|
1.72 kg / 3.78 pounds
1717 g / 16.8 N
|
10.30 kg / 22.71 pounds
~0 Gs
|
| 10 mm |
4.56 kg / 10.05 pounds
2 719 Gs
|
0.68 kg / 1.51 pounds
684 g / 6.7 N
|
4.10 kg / 9.04 pounds
~0 Gs
|
| 20 mm |
0.93 kg / 2.05 pounds
1 230 Gs
|
0.14 kg / 0.31 pounds
140 g / 1.4 N
|
0.84 kg / 1.85 pounds
~0 Gs
|
| 50 mm |
0.04 kg / 0.08 pounds
249 Gs
|
0.01 kg / 0.01 pounds
6 g / 0.1 N
|
0.03 kg / 0.08 pounds
~0 Gs
|
| 60 mm |
0.02 kg / 0.04 pounds
167 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.03 pounds
~0 Gs
|
| 70 mm |
0.01 kg / 0.02 pounds
116 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.01 pounds
84 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 pounds
62 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
48 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
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 |
| Phone / Smartphone | 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 (cracking risk) - collision effects
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: Corrosion resistance
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: Hydrostatics and buoyancy
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. Sliding resistance
*Warning: On a vertical wall, the magnet holds merely a fraction of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Thermal stability
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31
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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages as well as disadvantages of neodymium magnets.
Pros
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- They are noted for resistance to demagnetization induced by presence of other magnetic fields,
- A magnet with a shiny nickel surface is more attractive,
- Magnetic induction on the working part of the magnet remains maximum,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to freedom in shaping and the ability to customize to client solutions,
- Huge importance in advanced technology sectors – they are used in hard drives, brushless drives, precision medical tools, as well as industrial machines.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We suggest casing - magnetic mount, due to difficulties in producing nuts inside the magnet and complex forms.
- Health risk resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Magnetic strength at its maximum – what it depends on?
- with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
- with a thickness no less than 10 mm
- with an ground contact surface
- without any air gap between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Practical lifting capacity: influencing factors
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
- Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
- 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 measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.
H&S for magnets
Adults only
Absolutely store magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are life-threatening.
Metal Allergy
A percentage of the population experience a hypersensitivity to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause a rash. We strongly advise wear protective gloves.
Conscious usage
Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
GPS and phone interference
A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.
Finger safety
Big blocks can smash fingers instantly. Do not put your hand betwixt two attracting surfaces.
Heat warning
Avoid heat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Magnetic media
Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).
Machining danger
Powder produced during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Fragile material
Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.
ICD Warning
People with a heart stimulator have to maintain an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.
