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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Detailed specification - 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 outcome of a physical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Operational parameters may differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static force (force vs gap) - 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 lbs
73570.0 g / 721.7 N
|
dangerous! |
| 1 mm |
2778 Gs
277.8 mT
|
69.55 kg / 153.32 lbs
69546.1 g / 682.2 N
|
dangerous! |
| 2 mm |
2693 Gs
269.3 mT
|
65.33 kg / 144.03 lbs
65331.2 g / 640.9 N
|
dangerous! |
| 3 mm |
2603 Gs
260.3 mT
|
61.05 kg / 134.59 lbs
61047.5 g / 598.9 N
|
dangerous! |
| 5 mm |
2415 Gs
241.5 mT
|
52.56 kg / 115.87 lbs
52559.7 g / 515.6 N
|
dangerous! |
| 10 mm |
1943 Gs
194.3 mT
|
34.02 kg / 75.00 lbs
34021.1 g / 333.7 N
|
dangerous! |
| 15 mm |
1527 Gs
152.7 mT
|
21.01 kg / 46.31 lbs
21007.7 g / 206.1 N
|
dangerous! |
| 20 mm |
1192 Gs
119.2 mT
|
12.81 kg / 28.24 lbs
12808.1 g / 125.6 N
|
dangerous! |
| 30 mm |
736 Gs
73.6 mT
|
4.89 kg / 10.77 lbs
4886.6 g / 47.9 N
|
strong |
| 50 mm |
313 Gs
31.3 mT
|
0.88 kg / 1.95 lbs
884.8 g / 8.7 N
|
safe |
Table 2: Slippage capacity (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: 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 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: Material efficiency (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) - 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 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: 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 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: Hazards (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 |
| Phone / Smartphone | 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: 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: Anti-corrosion coating durability
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: Underwater work (magnet fishing)
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. Vertical hold
*Warning: On a vertical wall, the magnet retains only ~20% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.
3. Heat tolerance
*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
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros and cons of Nd2Fe14B magnets.
Pros
- They retain attractive force for almost 10 years – the loss is just ~1% (based on simulations),
- They feature excellent resistance to magnetic field loss when exposed to external fields,
- The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnets have excellent magnetic induction on the active area,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- In view of the potential of flexible shaping and customization to unique solutions, neodymium magnets can be modeled in a wide range of shapes and sizes, which increases their versatility,
- Universal use in innovative solutions – they are used in HDD drives, drive modules, diagnostic systems, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions
Weaknesses
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their force 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 durability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in creating nuts and complex forms in magnets, we recommend using casing - magnetic holder.
- Health risk related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
- Due to neodymium price, their price exceeds standard values,
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- using a base made of low-carbon steel, serving as a ideal flux conductor
- possessing a massiveness of at least 10 mm to avoid saturation
- characterized by lack of roughness
- under conditions of gap-free contact (metal-to-metal)
- under vertical force direction (90-degree angle)
- at ambient temperature room level
Lifting capacity in practice – influencing factors
- Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
- Surface condition – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
- Thermal environment – temperature increase results in weakening of induction. Check the thermal limit for a given model.
Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a small distance between the magnet and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Nickel coating and allergies
Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, cease handling magnets and wear gloves.
Heat warning
Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.
Magnet fragility
Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Health Danger
Patients with a pacemaker must keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.
Threat to electronics
Equipment safety: Neodymium magnets can damage payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
Impact on smartphones
Note: neodymium magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.
Do not give to children
Product intended for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of kids and pets.
Crushing force
Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Fire warning
Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Caution required
Use magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and respect their force.
