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MPL 80x40x15 / N38 - lamellar magnet

lamellar magnet

Catalog no 020177

GTIN/EAN: 5906301811831

5.00

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 with VAT / pcs + price for transport

113.45 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
113.45 ZŁ
139.54 ZŁ
price from 10 pcs
106.64 ZŁ
131.17 ZŁ
price from 25 pcs
99.84 ZŁ
122.80 ZŁ
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Parameters along with structure of magnets can be analyzed using our power calculator.

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Product card - MPL 80x40x15 / N38 - lamellar magnet

Specification / characteristics - MPL 80x40x15 / N38 - lamellar magnet

properties
properties values
Cat. no. 020177
GTIN/EAN 5906301811831
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics MPL 80x40x15 / N38 - lamellar magnet
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

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

Technical simulation of the product - technical parameters

The following data constitute the outcome of a physical analysis. Results are based on algorithms for the material Nd2Fe14B. Real-world conditions may differ. Use these data as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - 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 pounds
73570.0 g / 721.7 N
crushing
1 mm 2778 Gs
277.8 mT
69.55 kg / 153.32 pounds
69546.1 g / 682.2 N
crushing
2 mm 2693 Gs
269.3 mT
65.33 kg / 144.03 pounds
65331.2 g / 640.9 N
crushing
3 mm 2603 Gs
260.3 mT
61.05 kg / 134.59 pounds
61047.5 g / 598.9 N
crushing
5 mm 2415 Gs
241.5 mT
52.56 kg / 115.87 pounds
52559.7 g / 515.6 N
crushing
10 mm 1943 Gs
194.3 mT
34.02 kg / 75.00 pounds
34021.1 g / 333.7 N
crushing
15 mm 1527 Gs
152.7 mT
21.01 kg / 46.31 pounds
21007.7 g / 206.1 N
crushing
20 mm 1192 Gs
119.2 mT
12.81 kg / 28.24 pounds
12808.1 g / 125.6 N
crushing
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: Sliding force (wall)
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: Vertical assembly (sliding) - vertical pull
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: Material efficiency (substrate influence) - power losses
MPL 80x40x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
2.45 kg / 5.41 pounds
2452.3 g / 24.1 N
1 mm
8%
6.13 kg / 13.52 pounds
6130.8 g / 60.1 N
2 mm
17%
12.26 kg / 27.03 pounds
12261.7 g / 120.3 N
3 mm
25%
18.39 kg / 40.55 pounds
18392.5 g / 180.4 N
5 mm
42%
30.65 kg / 67.58 pounds
30654.2 g / 300.7 N
10 mm
83%
61.31 kg / 135.16 pounds
61308.3 g / 601.4 N
11 mm
92%
67.44 kg / 148.68 pounds
67439.2 g / 661.6 N
12 mm
100%
73.57 kg / 162.19 pounds
73570.0 g / 721.7 N

Table 5: Working in heat (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 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: Two magnets (attraction) - forces in the system
MPL 80x40x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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) - 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
Timepiece 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: Collisions (cracking risk) - 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: Construction 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: Physics of underwater searching
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains merely ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely reduces 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.

Engineering data and GPSR
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%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 020177-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other deals

Model MPL 80x40x15 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 721.75 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 73.57 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 80x40x15 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 80 mm (length), 40 mm (width), and 15 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 73.57 kg (force ~721.75 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of rare earth magnets.

Advantages

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • Magnets very well defend themselves against demagnetization caused by ambient magnetic noise,
  • Thanks to the shiny finish, the plating of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to modularity in constructing and the ability to customize to complex applications,
  • Wide application in innovative solutions – they are commonly used in magnetic memories, electromotive mechanisms, medical equipment, as well as other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons

Problematic aspects of neodymium magnets: tips and applications.
  • At strong impacts they can crack, therefore we advise 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 lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in creating nuts and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

The declared magnet strength represents the peak performance, measured under laboratory conditions, meaning:
  • using a base made of mild steel, functioning as a circuit closing element
  • with a thickness of at least 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (metal-to-metal)
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature room level

Determinants of practical lifting force of a magnet

During everyday use, the actual lifting capacity is determined by several key aspects, listed from crucial:
  • Gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined using a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.

H&S for magnets
Nickel coating and allergies

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, immediately stop working with magnets and wear gloves.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them shattering into shards.

Impact on smartphones

Remember: neodymium magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.

Immense force

Be careful. Rare earth magnets attract from a long distance and connect with huge force, often quicker than you can react.

Hand protection

Pinching hazard: The attraction force is so immense that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Operating temperature

Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. Damage is permanent.

Implant safety

People with a heart stimulator must keep an safe separation from magnets. The magnetic field can interfere with the operation of the life-saving device.

Dust explosion hazard

Powder created during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Keep away from children

Only for adults. Small elements pose a choking risk, leading to intestinal necrosis. Store away from children and animals.

Threat to electronics

Do not bring magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Security! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98