MPL 40x15x6 / N38 - lamellar magnet
lamellar magnet
Catalog no 020155
GTIN/EAN: 5906301811619
length
40 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
27 g
Magnetization Direction
↑ axial
Load capacity
14.21 kg / 139.45 N
Magnetic Induction
286.36 mT / 2864 Gs
Coating
[NiCuNi] Nickel
18.45 ZŁ with VAT / pcs + price for transport
15.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Pick up the phone and ask
+48 22 499 98 98
alternatively let us know by means of
our online form
the contact form page.
Force as well as shape of neodymium magnets can be reviewed on our
power calculator.
Order by 14:00 and we’ll ship today!
Technical details - MPL 40x15x6 / N38 - lamellar magnet
Specification / characteristics - MPL 40x15x6 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020155 |
| GTIN/EAN | 5906301811619 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 27 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 14.21 kg / 139.45 N |
| Magnetic Induction ~ ? | 286.36 mT / 2864 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 analysis of the product - technical parameters
Presented values constitute the outcome of a engineering analysis. Values rely on algorithms for the class Nd2Fe14B. Actual parameters may differ from theoretical values. Use these calculations as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - power drop
MPL 40x15x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2863 Gs
286.3 mT
|
14.21 kg / 31.33 pounds
14210.0 g / 139.4 N
|
dangerous! |
| 1 mm |
2635 Gs
263.5 mT
|
12.04 kg / 26.55 pounds
12041.8 g / 118.1 N
|
dangerous! |
| 2 mm |
2385 Gs
238.5 mT
|
9.86 kg / 21.74 pounds
9859.1 g / 96.7 N
|
warning |
| 3 mm |
2132 Gs
213.2 mT
|
7.88 kg / 17.37 pounds
7880.1 g / 77.3 N
|
warning |
| 5 mm |
1670 Gs
167.0 mT
|
4.84 kg / 10.66 pounds
4837.1 g / 47.5 N
|
warning |
| 10 mm |
903 Gs
90.3 mT
|
1.41 kg / 3.11 pounds
1412.2 g / 13.9 N
|
safe |
| 15 mm |
520 Gs
52.0 mT
|
0.47 kg / 1.03 pounds
469.2 g / 4.6 N
|
safe |
| 20 mm |
320 Gs
32.0 mT
|
0.18 kg / 0.39 pounds
177.7 g / 1.7 N
|
safe |
| 30 mm |
141 Gs
14.1 mT
|
0.03 kg / 0.08 pounds
34.5 g / 0.3 N
|
safe |
| 50 mm |
41 Gs
4.1 mT
|
0.00 kg / 0.01 pounds
3.0 g / 0.0 N
|
safe |
Table 2: Slippage force (vertical surface)
MPL 40x15x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.84 kg / 6.27 pounds
2842.0 g / 27.9 N
|
| 1 mm | Stal (~0.2) |
2.41 kg / 5.31 pounds
2408.0 g / 23.6 N
|
| 2 mm | Stal (~0.2) |
1.97 kg / 4.35 pounds
1972.0 g / 19.3 N
|
| 3 mm | Stal (~0.2) |
1.58 kg / 3.47 pounds
1576.0 g / 15.5 N
|
| 5 mm | Stal (~0.2) |
0.97 kg / 2.13 pounds
968.0 g / 9.5 N
|
| 10 mm | Stal (~0.2) |
0.28 kg / 0.62 pounds
282.0 g / 2.8 N
|
| 15 mm | Stal (~0.2) |
0.09 kg / 0.21 pounds
94.0 g / 0.9 N
|
| 20 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
36.0 g / 0.4 N
|
| 30 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MPL 40x15x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
4.26 kg / 9.40 pounds
4263.0 g / 41.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.84 kg / 6.27 pounds
2842.0 g / 27.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.42 kg / 3.13 pounds
1421.0 g / 13.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
7.11 kg / 15.66 pounds
7105.0 g / 69.7 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 40x15x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.71 kg / 1.57 pounds
710.5 g / 7.0 N
|
| 1 mm |
|
1.78 kg / 3.92 pounds
1776.3 g / 17.4 N
|
| 2 mm |
|
3.55 kg / 7.83 pounds
3552.5 g / 34.9 N
|
| 3 mm |
|
5.33 kg / 11.75 pounds
5328.8 g / 52.3 N
|
| 5 mm |
|
8.88 kg / 19.58 pounds
8881.3 g / 87.1 N
|
| 10 mm |
|
14.21 kg / 31.33 pounds
14210.0 g / 139.4 N
|
| 11 mm |
|
14.21 kg / 31.33 pounds
14210.0 g / 139.4 N
|
| 12 mm |
|
14.21 kg / 31.33 pounds
14210.0 g / 139.4 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 40x15x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
14.21 kg / 31.33 pounds
14210.0 g / 139.4 N
|
OK |
| 40 °C | -2.2% |
13.90 kg / 30.64 pounds
13897.4 g / 136.3 N
|
OK |
| 60 °C | -4.4% |
13.58 kg / 29.95 pounds
13584.8 g / 133.3 N
|
|
| 80 °C | -6.6% |
13.27 kg / 29.26 pounds
13272.1 g / 130.2 N
|
|
| 100 °C | -28.8% |
10.12 kg / 22.31 pounds
10117.5 g / 99.3 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 40x15x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
30.32 kg / 66.84 pounds
4 334 Gs
|
4.55 kg / 10.03 pounds
4547 g / 44.6 N
|
N/A |
| 1 mm |
28.06 kg / 61.86 pounds
5 508 Gs
|
4.21 kg / 9.28 pounds
4209 g / 41.3 N
|
25.25 kg / 55.67 pounds
~0 Gs
|
| 2 mm |
25.69 kg / 56.64 pounds
5 271 Gs
|
3.85 kg / 8.50 pounds
3854 g / 37.8 N
|
23.12 kg / 50.97 pounds
~0 Gs
|
| 3 mm |
23.33 kg / 51.43 pounds
5 023 Gs
|
3.50 kg / 7.71 pounds
3499 g / 34.3 N
|
21.00 kg / 46.29 pounds
~0 Gs
|
| 5 mm |
18.85 kg / 41.56 pounds
4 515 Gs
|
2.83 kg / 6.23 pounds
2828 g / 27.7 N
|
16.97 kg / 37.40 pounds
~0 Gs
|
| 10 mm |
10.32 kg / 22.75 pounds
3 341 Gs
|
1.55 kg / 3.41 pounds
1548 g / 15.2 N
|
9.29 kg / 20.48 pounds
~0 Gs
|
| 20 mm |
3.01 kg / 6.64 pounds
1 805 Gs
|
0.45 kg / 1.00 pounds
452 g / 4.4 N
|
2.71 kg / 5.98 pounds
~0 Gs
|
| 50 mm |
0.16 kg / 0.35 pounds
416 Gs
|
0.02 kg / 0.05 pounds
24 g / 0.2 N
|
0.14 kg / 0.32 pounds
~0 Gs
|
| 60 mm |
0.07 kg / 0.16 pounds
282 Gs
|
0.01 kg / 0.02 pounds
11 g / 0.1 N
|
0.07 kg / 0.15 pounds
~0 Gs
|
| 70 mm |
0.04 kg / 0.08 pounds
199 Gs
|
0.01 kg / 0.01 pounds
5 g / 0.1 N
|
0.03 kg / 0.07 pounds
~0 Gs
|
| 80 mm |
0.02 kg / 0.04 pounds
144 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 90 mm |
0.01 kg / 0.02 pounds
108 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 100 mm |
0.01 kg / 0.01 pounds
83 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 40x15x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 8.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (kinetic energy) - warning
MPL 40x15x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.53 km/h
(6.81 m/s)
|
0.63 J | |
| 30 mm |
40.13 km/h
(11.15 m/s)
|
1.68 J | |
| 50 mm |
51.74 km/h
(14.37 m/s)
|
2.79 J | |
| 100 mm |
73.16 km/h
(20.32 m/s)
|
5.58 J |
Table 9: Anti-corrosion coating durability
MPL 40x15x6 / 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 40x15x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 16 905 Mx | 169.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 40x15x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 14.21 kg | Standard |
| Water (riverbed) |
16.27 kg
(+2.06 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains only a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Thermal stability
*For N38 material, 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
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 |
View more proposals
Strengths and weaknesses of neodymium magnets.
Strengths
- They do not lose magnetism, even after approximately ten years – the reduction in power is only ~1% (according to tests),
- They feature excellent resistance to magnetism drop as a result of external magnetic sources,
- A magnet with a shiny nickel surface has better aesthetics,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
- Thanks to the ability of flexible forming and customization to individualized needs, neodymium magnets can be created in a broad palette of forms and dimensions, which makes them more universal,
- Wide application in modern industrial fields – they find application in computer drives, electric drive systems, medical equipment, and other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in compact constructions
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- 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.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Limited possibility of producing nuts in the magnet and complicated shapes - recommended is cover - mounting mechanism.
- Health risk related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these products can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Magnetic strength at its maximum – what affects it?
- with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of minimum 10 mm to avoid saturation
- characterized by even structure
- without any clearance between the magnet and steel
- during pulling in a direction vertical to the plane
- at room temperature
Practical aspects of lifting capacity – factors
- Distance – the presence of any layer (paint, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
- Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
- Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.
Warnings
Electronic devices
Data protection: Neodymium magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).
Mechanical processing
Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.
Eye protection
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Bone fractures
Pinching hazard: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.
Heat warning
Do not overheat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
Metal Allergy
Some people have a sensitization to nickel, which is the standard coating for neodymium magnets. Frequent touching might lead to a rash. We suggest wear safety gloves.
Handling guide
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Medical interference
For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.
Swallowing risk
Always keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are life-threatening.
GPS and phone interference
A strong magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a device to avoid damaging the sensors.
