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 data - 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 simulation of the assembly - data
Presented data represent the result of a mathematical analysis. Values are based on models for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs distance) - characteristics
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 pounds
73570.0 g / 721.7 N
|
critical level |
| 1 mm |
2778 Gs
277.8 mT
|
69.55 kg / 153.32 pounds
69546.1 g / 682.2 N
|
critical level |
| 2 mm |
2693 Gs
269.3 mT
|
65.33 kg / 144.03 pounds
65331.2 g / 640.9 N
|
critical level |
| 3 mm |
2603 Gs
260.3 mT
|
61.05 kg / 134.59 pounds
61047.5 g / 598.9 N
|
critical level |
| 5 mm |
2415 Gs
241.5 mT
|
52.56 kg / 115.87 pounds
52559.7 g / 515.6 N
|
critical level |
| 10 mm |
1943 Gs
194.3 mT
|
34.02 kg / 75.00 pounds
34021.1 g / 333.7 N
|
critical level |
| 15 mm |
1527 Gs
152.7 mT
|
21.01 kg / 46.31 pounds
21007.7 g / 206.1 N
|
critical level |
| 20 mm |
1192 Gs
119.2 mT
|
12.81 kg / 28.24 pounds
12808.1 g / 125.6 N
|
critical level |
| 30 mm |
736 Gs
73.6 mT
|
4.89 kg / 10.77 pounds
4886.6 g / 47.9 N
|
strong |
| 50 mm |
313 Gs
31.3 mT
|
0.88 kg / 1.95 pounds
884.8 g / 8.7 N
|
weak grip |
Table 2: Slippage load (vertical surface)
MPL 80x40x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
14.71 kg / 32.44 pounds
14714.0 g / 144.3 N
|
| 1 mm | Stal (~0.2) |
13.91 kg / 30.67 pounds
13910.0 g / 136.5 N
|
| 2 mm | Stal (~0.2) |
13.07 kg / 28.81 pounds
13066.0 g / 128.2 N
|
| 3 mm | Stal (~0.2) |
12.21 kg / 26.92 pounds
12210.0 g / 119.8 N
|
| 5 mm | Stal (~0.2) |
10.51 kg / 23.17 pounds
10512.0 g / 103.1 N
|
| 10 mm | Stal (~0.2) |
6.80 kg / 15.00 pounds
6804.0 g / 66.7 N
|
| 15 mm | Stal (~0.2) |
4.20 kg / 9.26 pounds
4202.0 g / 41.2 N
|
| 20 mm | Stal (~0.2) |
2.56 kg / 5.65 pounds
2562.0 g / 25.1 N
|
| 30 mm | Stal (~0.2) |
0.98 kg / 2.16 pounds
978.0 g / 9.6 N
|
| 50 mm | Stal (~0.2) |
0.18 kg / 0.39 pounds
176.0 g / 1.7 N
|
Table 3: Wall mounting (sliding) - 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 pounds
22071.0 g / 216.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
14.71 kg / 32.44 pounds
14714.0 g / 144.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
7.36 kg / 16.22 pounds
7357.0 g / 72.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
36.79 kg / 81.10 pounds
36785.0 g / 360.9 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 80x40x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.45 kg / 5.41 pounds
2452.3 g / 24.1 N
|
| 1 mm |
|
6.13 kg / 13.52 pounds
6130.8 g / 60.1 N
|
| 2 mm |
|
12.26 kg / 27.03 pounds
12261.7 g / 120.3 N
|
| 3 mm |
|
18.39 kg / 40.55 pounds
18392.5 g / 180.4 N
|
| 5 mm |
|
30.65 kg / 67.58 pounds
30654.2 g / 300.7 N
|
| 10 mm |
|
61.31 kg / 135.16 pounds
61308.3 g / 601.4 N
|
| 11 mm |
|
67.44 kg / 148.68 pounds
67439.2 g / 661.6 N
|
| 12 mm |
|
73.57 kg / 162.19 pounds
73570.0 g / 721.7 N
|
Table 5: Thermal stability (stability) - thermal limit
MPL 80x40x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
73.57 kg / 162.19 pounds
73570.0 g / 721.7 N
|
OK |
| 40 °C | -2.2% |
71.95 kg / 158.63 pounds
71951.5 g / 705.8 N
|
OK |
| 60 °C | -4.4% |
70.33 kg / 155.06 pounds
70332.9 g / 690.0 N
|
|
| 80 °C | -6.6% |
68.71 kg / 151.49 pounds
68714.4 g / 674.1 N
|
|
| 100 °C | -28.8% |
52.38 kg / 115.48 pounds
52381.8 g / 513.9 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 80x40x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
161.08 kg / 355.13 pounds
4 384 Gs
|
24.16 kg / 53.27 pounds
24163 g / 237.0 N
|
N/A |
| 1 mm |
156.77 kg / 345.63 pounds
5 638 Gs
|
23.52 kg / 51.84 pounds
23516 g / 230.7 N
|
141.10 kg / 311.07 pounds
~0 Gs
|
| 2 mm |
152.27 kg / 335.70 pounds
5 556 Gs
|
22.84 kg / 50.36 pounds
22841 g / 224.1 N
|
137.05 kg / 302.13 pounds
~0 Gs
|
| 3 mm |
147.69 kg / 325.60 pounds
5 472 Gs
|
22.15 kg / 48.84 pounds
22153 g / 217.3 N
|
132.92 kg / 293.04 pounds
~0 Gs
|
| 5 mm |
138.36 kg / 305.04 pounds
5 297 Gs
|
20.75 kg / 45.76 pounds
20754 g / 203.6 N
|
124.53 kg / 274.53 pounds
~0 Gs
|
| 10 mm |
115.08 kg / 253.71 pounds
4 830 Gs
|
17.26 kg / 38.06 pounds
17262 g / 169.3 N
|
103.57 kg / 228.34 pounds
~0 Gs
|
| 20 mm |
74.49 kg / 164.22 pounds
3 886 Gs
|
11.17 kg / 24.63 pounds
11174 g / 109.6 N
|
67.04 kg / 147.80 pounds
~0 Gs
|
| 50 mm |
17.20 kg / 37.91 pounds
1 867 Gs
|
2.58 kg / 5.69 pounds
2580 g / 25.3 N
|
15.48 kg / 34.12 pounds
~0 Gs
|
| 60 mm |
10.70 kg / 23.59 pounds
1 473 Gs
|
1.60 kg / 3.54 pounds
1605 g / 15.7 N
|
9.63 kg / 21.23 pounds
~0 Gs
|
| 70 mm |
6.78 kg / 14.94 pounds
1 172 Gs
|
1.02 kg / 2.24 pounds
1017 g / 10.0 N
|
6.10 kg / 13.45 pounds
~0 Gs
|
| 80 mm |
4.38 kg / 9.65 pounds
942 Gs
|
0.66 kg / 1.45 pounds
657 g / 6.4 N
|
3.94 kg / 8.69 pounds
~0 Gs
|
| 90 mm |
2.89 kg / 6.36 pounds
765 Gs
|
0.43 kg / 0.95 pounds
433 g / 4.2 N
|
2.60 kg / 5.72 pounds
~0 Gs
|
| 100 mm |
1.94 kg / 4.27 pounds
627 Gs
|
0.29 kg / 0.64 pounds
291 g / 2.9 N
|
1.74 kg / 3.84 pounds
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
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 |
| Mobile device | 40 Gs (4.0 mT) | 12.5 cm |
| Remote | 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: Dynamics (kinetic energy) - warning
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 (Flux)
MPL 80x40x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 94 833 Mx | 948.3 µWb |
| Pc Coefficient | 0.33 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
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)
*Caution: On a vertical surface, the magnet retains merely ~20% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely limits the holding force.
3. Temperature resistance
*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) = 0.33
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros as well as cons of Nd2Fe14B magnets.
Strengths
- They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
- They do not lose their magnetic properties even under external field action,
- A magnet with a shiny silver surface looks better,
- Neodymium magnets create maximum magnetic induction on a small surface, which increases force concentration,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
- Thanks to the option of precise forming and adaptation to unique needs, NdFeB magnets can be created in a broad palette of shapes and sizes, which amplifies use scope,
- Fundamental importance in future technologies – they serve a role in HDD drives, electric motors, diagnostic systems, also complex engineering applications.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's 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 start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- We suggest cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these magnets can be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- using a plate made of high-permeability steel, acting as a magnetic yoke
- possessing a thickness of at least 10 mm to ensure full flux closure
- characterized by even structure
- with total lack of distance (no coatings)
- during pulling in a direction vertical to the plane
- at room temperature
Lifting capacity in practice – influencing factors
- Clearance – existence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Load vector – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
- Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.
Safe handling of neodymium magnets
Handling rules
Handle with care. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can react.
Protect data
Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
Allergy Warning
Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop handling magnets and use protective gear.
Impact on smartphones
A strong magnetic field disrupts the functioning of compasses in phones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.
Finger safety
Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Material brittleness
Neodymium magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets will cause them cracking into shards.
Machining danger
Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Demagnetization risk
Do not overheat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).
ICD Warning
Life threat: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
No play value
NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.
