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
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Technical - 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 simulation of the assembly - report
Presented values are the direct effect of a mathematical analysis. Results rely on models for the class Nd2Fe14B. Actual performance may deviate from the simulation results. Use these data as a supplementary guide during assembly planning.
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
|
medium risk |
| 3 mm |
2132 Gs
213.2 mT
|
7.88 kg / 17.37 pounds
7880.1 g / 77.3 N
|
medium risk |
| 5 mm |
1670 Gs
167.0 mT
|
4.84 kg / 10.66 pounds
4837.1 g / 47.5 N
|
medium risk |
| 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: Sliding capacity (wall)
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: Wall mounting (sliding) - behavior on slippery surfaces
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: Material efficiency (saturation) - power losses
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: Working in heat (material behavior) - thermal limit
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: Magnet-Magnet interaction (repulsion) - field range
MPL 40x15x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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) - warnings
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 |
| Car key | 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: Dynamics (kinetic energy) - collision effects
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: Coating parameters (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: Hydrostatics and buoyancy
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. Wall mount (shear)
*Note: On a vertical wall, the magnet holds just a fraction of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.
3. Thermal stability
*For standard magnets, 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.
Chemical composition
| 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 |
Other offers
Pros as well as cons of Nd2Fe14B magnets.
Advantages
- Their power is durable, and after approximately ten years it decreases only by ~1% (theoretically),
- They maintain their magnetic properties even under external field action,
- Thanks to the glossy finish, the plating of nickel, gold-plated, or silver gives an professional appearance,
- Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Due to the possibility of accurate molding and adaptation to specialized projects, neodymium magnets can be created in a wide range of shapes and sizes, which expands the range of possible applications,
- Versatile presence in modern industrial fields – they are commonly used in HDD drives, electric motors, precision medical tools, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices
Cons
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Detachment force of the magnet in optimal conditions – what it depends on?
- using a base made of low-carbon steel, serving as a circuit closing element
- with a cross-section minimum 10 mm
- with an ideally smooth touching surface
- with zero gap (without coatings)
- under vertical force vector (90-degree angle)
- in temp. approx. 20°C
Lifting capacity in real conditions – factors
- Gap 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 – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
- Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
- Surface condition – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
- Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.
Safety rules for work with NdFeB magnets
Physical harm
Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Be careful!
Magnets are brittle
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Keep away from children
Only for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Keep out of reach of children and animals.
Magnetic interference
Note: neodymium magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, tablet, and GPS.
Permanent damage
Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Allergic reactions
Some people have a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling may cause a rash. We strongly advise use protective gloves.
Combustion hazard
Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.
ICD Warning
Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.
Conscious usage
Handle magnets consciously. Their huge power can surprise even professionals. Stay alert and respect their power.
Threat to electronics
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).
