MPL 80x40x15 / N38 - lamellar magnet
lamellar magnet
Catalog no 020177
GTIN/EAN: 5906301811831
length
80 mm [±0,1 mm]
Width
40 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
360 g
Magnetization Direction
↑ axial
Load capacity
73.57 kg / 721.75 N
Magnetic Induction
285.78 mT / 2858 Gs
Coating
[NiCuNi] Nickel
139.54 ZŁ with VAT / pcs + price for transport
113.45 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MPL 80x40x15 / N38 - lamellar magnet
Specification / characteristics - MPL 80x40x15 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020177 |
| GTIN/EAN | 5906301811831 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 80 mm [±0,1 mm] |
| Width | 40 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 360 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 73.57 kg / 721.75 N |
| Magnetic Induction ~ ? | 285.78 mT / 2858 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 - data
The following information are the direct effect of a physical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Operational performance may differ. Please consider these data as a supplementary guide during assembly planning.
Table 1: Static force (pull vs distance) - power drop
MPL 80x40x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2857 Gs
285.7 mT
|
73.57 kg / 162.19 LBS
73570.0 g / 721.7 N
|
critical level |
| 1 mm |
2778 Gs
277.8 mT
|
69.55 kg / 153.32 LBS
69546.1 g / 682.2 N
|
critical level |
| 2 mm |
2693 Gs
269.3 mT
|
65.33 kg / 144.03 LBS
65331.2 g / 640.9 N
|
critical level |
| 3 mm |
2603 Gs
260.3 mT
|
61.05 kg / 134.59 LBS
61047.5 g / 598.9 N
|
critical level |
| 5 mm |
2415 Gs
241.5 mT
|
52.56 kg / 115.87 LBS
52559.7 g / 515.6 N
|
critical level |
| 10 mm |
1943 Gs
194.3 mT
|
34.02 kg / 75.00 LBS
34021.1 g / 333.7 N
|
critical level |
| 15 mm |
1527 Gs
152.7 mT
|
21.01 kg / 46.31 LBS
21007.7 g / 206.1 N
|
critical level |
| 20 mm |
1192 Gs
119.2 mT
|
12.81 kg / 28.24 LBS
12808.1 g / 125.6 N
|
critical level |
| 30 mm |
736 Gs
73.6 mT
|
4.89 kg / 10.77 LBS
4886.6 g / 47.9 N
|
warning |
| 50 mm |
313 Gs
31.3 mT
|
0.88 kg / 1.95 LBS
884.8 g / 8.7 N
|
weak grip |
Table 2: Slippage load (wall)
MPL 80x40x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
14.71 kg / 32.44 LBS
14714.0 g / 144.3 N
|
| 1 mm | Stal (~0.2) |
13.91 kg / 30.67 LBS
13910.0 g / 136.5 N
|
| 2 mm | Stal (~0.2) |
13.07 kg / 28.81 LBS
13066.0 g / 128.2 N
|
| 3 mm | Stal (~0.2) |
12.21 kg / 26.92 LBS
12210.0 g / 119.8 N
|
| 5 mm | Stal (~0.2) |
10.51 kg / 23.17 LBS
10512.0 g / 103.1 N
|
| 10 mm | Stal (~0.2) |
6.80 kg / 15.00 LBS
6804.0 g / 66.7 N
|
| 15 mm | Stal (~0.2) |
4.20 kg / 9.26 LBS
4202.0 g / 41.2 N
|
| 20 mm | Stal (~0.2) |
2.56 kg / 5.65 LBS
2562.0 g / 25.1 N
|
| 30 mm | Stal (~0.2) |
0.98 kg / 2.16 LBS
978.0 g / 9.6 N
|
| 50 mm | Stal (~0.2) |
0.18 kg / 0.39 LBS
176.0 g / 1.7 N
|
Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 80x40x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
22.07 kg / 48.66 LBS
22071.0 g / 216.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
14.71 kg / 32.44 LBS
14714.0 g / 144.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
7.36 kg / 16.22 LBS
7357.0 g / 72.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
36.79 kg / 81.10 LBS
36785.0 g / 360.9 N
|
Table 4: Steel thickness (saturation) - power losses
MPL 80x40x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.45 kg / 5.41 LBS
2452.3 g / 24.1 N
|
| 1 mm |
|
6.13 kg / 13.52 LBS
6130.8 g / 60.1 N
|
| 2 mm |
|
12.26 kg / 27.03 LBS
12261.7 g / 120.3 N
|
| 3 mm |
|
18.39 kg / 40.55 LBS
18392.5 g / 180.4 N
|
| 5 mm |
|
30.65 kg / 67.58 LBS
30654.2 g / 300.7 N
|
| 10 mm |
|
61.31 kg / 135.16 LBS
61308.3 g / 601.4 N
|
| 11 mm |
|
67.44 kg / 148.68 LBS
67439.2 g / 661.6 N
|
| 12 mm |
|
73.57 kg / 162.19 LBS
73570.0 g / 721.7 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 80x40x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
73.57 kg / 162.19 LBS
73570.0 g / 721.7 N
|
OK |
| 40 °C | -2.2% |
71.95 kg / 158.63 LBS
71951.5 g / 705.8 N
|
OK |
| 60 °C | -4.4% |
70.33 kg / 155.06 LBS
70332.9 g / 690.0 N
|
|
| 80 °C | -6.6% |
68.71 kg / 151.49 LBS
68714.4 g / 674.1 N
|
|
| 100 °C | -28.8% |
52.38 kg / 115.48 LBS
52381.8 g / 513.9 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 80x40x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
161.08 kg / 355.13 LBS
4 384 Gs
|
24.16 kg / 53.27 LBS
24163 g / 237.0 N
|
N/A |
| 1 mm |
156.77 kg / 345.63 LBS
5 638 Gs
|
23.52 kg / 51.84 LBS
23516 g / 230.7 N
|
141.10 kg / 311.07 LBS
~0 Gs
|
| 2 mm |
152.27 kg / 335.70 LBS
5 556 Gs
|
22.84 kg / 50.36 LBS
22841 g / 224.1 N
|
137.05 kg / 302.13 LBS
~0 Gs
|
| 3 mm |
147.69 kg / 325.60 LBS
5 472 Gs
|
22.15 kg / 48.84 LBS
22153 g / 217.3 N
|
132.92 kg / 293.04 LBS
~0 Gs
|
| 5 mm |
138.36 kg / 305.04 LBS
5 297 Gs
|
20.75 kg / 45.76 LBS
20754 g / 203.6 N
|
124.53 kg / 274.53 LBS
~0 Gs
|
| 10 mm |
115.08 kg / 253.71 LBS
4 830 Gs
|
17.26 kg / 38.06 LBS
17262 g / 169.3 N
|
103.57 kg / 228.34 LBS
~0 Gs
|
| 20 mm |
74.49 kg / 164.22 LBS
3 886 Gs
|
11.17 kg / 24.63 LBS
11174 g / 109.6 N
|
67.04 kg / 147.80 LBS
~0 Gs
|
| 50 mm |
17.20 kg / 37.91 LBS
1 867 Gs
|
2.58 kg / 5.69 LBS
2580 g / 25.3 N
|
15.48 kg / 34.12 LBS
~0 Gs
|
| 60 mm |
10.70 kg / 23.59 LBS
1 473 Gs
|
1.60 kg / 3.54 LBS
1605 g / 15.7 N
|
9.63 kg / 21.23 LBS
~0 Gs
|
| 70 mm |
6.78 kg / 14.94 LBS
1 172 Gs
|
1.02 kg / 2.24 LBS
1017 g / 10.0 N
|
6.10 kg / 13.45 LBS
~0 Gs
|
| 80 mm |
4.38 kg / 9.65 LBS
942 Gs
|
0.66 kg / 1.45 LBS
657 g / 6.4 N
|
3.94 kg / 8.69 LBS
~0 Gs
|
| 90 mm |
2.89 kg / 6.36 LBS
765 Gs
|
0.43 kg / 0.95 LBS
433 g / 4.2 N
|
2.60 kg / 5.72 LBS
~0 Gs
|
| 100 mm |
1.94 kg / 4.27 LBS
627 Gs
|
0.29 kg / 0.64 LBS
291 g / 2.9 N
|
1.74 kg / 3.84 LBS
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MPL 80x40x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 26.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 20.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 16.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 12.5 cm |
| Car key | 50 Gs (5.0 mT) | 11.5 cm |
| Payment card | 400 Gs (40.0 mT) | 4.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MPL 80x40x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
18.11 km/h
(5.03 m/s)
|
4.56 J | |
| 30 mm |
25.99 km/h
(7.22 m/s)
|
9.38 J | |
| 50 mm |
32.48 km/h
(9.02 m/s)
|
14.65 J | |
| 100 mm |
45.61 km/h
(12.67 m/s)
|
28.89 J |
Table 9: Corrosion resistance
MPL 80x40x15 / 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 80x40x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 94 833 Mx | 948.3 µWb |
| Pc Coefficient | 0.33 | Low (Flat) |
Table 11: Submerged application
MPL 80x40x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 73.57 kg | Standard |
| Water (riverbed) |
84.24 kg
(+10.67 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet holds just a fraction of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Temperature resistance
*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) = 0.33
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.
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 also deals
Strengths and weaknesses of rare earth magnets.
Advantages
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- They feature excellent resistance to magnetism drop as a result of opposing magnetic fields,
- A magnet with a smooth gold surface has an effective appearance,
- The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of exact forming as well as adapting to complex applications,
- Huge importance in innovative solutions – they serve a role in magnetic memories, electric motors, medical devices, also complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
- Neodymium magnets decrease their strength 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can be problematic in diagnostics medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what contributes to it?
- using a base made of mild steel, acting as a ideal flux conductor
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a surface free of scratches
- without any clearance between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Gap (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
- Surface finish – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the load capacity.
Warnings
Safe distance
Do not bring magnets near a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.
Machining danger
Powder produced during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Magnets are brittle
Beware of splinters. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
Product not for children
Strictly keep magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.
Warning for heart patients
For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.
Handling rules
Handle magnets with awareness. Their immense force can shock even professionals. Plan your moves and respect their force.
GPS and phone interference
A strong magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Maintain magnets close to a device to prevent breaking the sensors.
Nickel allergy
It is widely known that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact or opt for coated magnets.
Permanent damage
Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Physical harm
Risk of injury: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.
