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MPL 75x75x20 / N38 - lamellar magnet

lamellar magnet

Catalog no 020587

GTIN/EAN: 5906301815808

Load capacity 120.18 kg / 1178.56 N Magnetic Induction 267.76 mT / 2678 Gs
length
75 mm [±0,1 mm]
Width
75 mm [±0,1 mm]
Height
20 mm [±0,1 mm]
Weight
843.75 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

259.07 zł net / pcs

318.66 zł with VAT (23% VAT) / pcs

price for transport

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Quantity
Net
Gross
price from 1 pcs
259.07 zł
318.66 zł
price from 5 pcs
243.53 zł
299.54 zł
price from 10 pcs
227.98 zł
280.42 zł

Frequently asked questions

What pull rating should I choose for a workshop block magnet?
A catalogue pull rating is measured under stated test conditions. A painted or thin steel surface, a gap or a load acting along the surface can reduce the practical grip. Choose a margin based on the actual installation and read the product card.
Are block neodymium magnets available in more durable versions?
Sintered NdFeB is brittle and can corrode if its coating is damaged. Check the coating and operating-temperature limit of the selected product. A housing may help protect a magnet in an application exposed to impacts.
How should I choose block magnets for mounting a structure?
First check the steel grade and thickness, then any gap created by paint or dirt, and finally the direction of the applied load. Compare these conditions with the specifications of the selected magnet; do not rely on grade alone.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical specification - MPL 75x75x20 / N38 - lamellar magnet

Specification / characteristics - MPL 75x75x20 / N38 - lamellar magnet

properties
properties values
Cat. no. 020587
GTIN/EAN 5906301815808
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
length 75 mm [±0,1 mm]
Width 75 mm [±0,1 mm]
Height 20 mm [±0,1 mm]
Weight 843.75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 120.18 kg / 1178.56 N
Magnetic Induction ~ ? 267.76 mT / 2678 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 75x75x20 / N38 - lamellar magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 analysis of the assembly - report

Presented data are the outcome of a mathematical analysis. Results rely on algorithms for the material Nd2Fe14B. Operational performance may differ from theoretical values. Treat these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
MPL 75x75x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2677 Gs
267.7 mT
120.18 kg / 264.95 LBS
120180.0 g / 1179.0 N
dangerous!
1 mm 2636 Gs
263.6 mT
116.48 kg / 256.80 LBS
116482.6 g / 1142.7 N
dangerous!
2 mm 2591 Gs
259.1 mT
112.56 kg / 248.16 LBS
112563.5 g / 1104.2 N
dangerous!
3 mm 2544 Gs
254.4 mT
108.49 kg / 239.19 LBS
108494.9 g / 1064.3 N
dangerous!
5 mm 2443 Gs
244.3 mT
100.05 kg / 220.57 LBS
100049.7 g / 981.5 N
dangerous!
10 mm 2165 Gs
216.5 mT
78.61 kg / 173.29 LBS
78605.1 g / 771.1 N
dangerous!
15 mm 1877 Gs
187.7 mT
59.05 kg / 130.18 LBS
59049.0 g / 579.3 N
dangerous!
20 mm 1601 Gs
160.1 mT
42.96 kg / 94.71 LBS
42960.5 g / 421.4 N
dangerous!
30 mm 1135 Gs
113.5 mT
21.59 kg / 47.59 LBS
21585.3 g / 211.8 N
dangerous!
50 mm 566 Gs
56.6 mT
5.37 kg / 11.84 LBS
5369.5 g / 52.7 N
medium risk

Table 2: Shear hold (wall)
MPL 75x75x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Raw steel (µ ≈ 0.2) 24.04 kg / 52.99 LBS
24036.0 g / 235.8 N
1 mm Raw steel (µ ≈ 0.2) 23.30 kg / 51.36 LBS
23296.0 g / 228.5 N
2 mm Raw steel (µ ≈ 0.2) 22.51 kg / 49.63 LBS
22512.0 g / 220.8 N
3 mm Raw steel (µ ≈ 0.2) 21.70 kg / 47.84 LBS
21698.0 g / 212.9 N
5 mm Raw steel (µ ≈ 0.2) 20.01 kg / 44.11 LBS
20010.0 g / 196.3 N
10 mm Raw steel (µ ≈ 0.2) 15.72 kg / 34.66 LBS
15722.0 g / 154.2 N
15 mm Raw steel (µ ≈ 0.2) 11.81 kg / 26.04 LBS
11810.0 g / 115.9 N
20 mm Raw steel (µ ≈ 0.2) 8.59 kg / 18.94 LBS
8592.0 g / 84.3 N
30 mm Raw steel (µ ≈ 0.2) 4.32 kg / 9.52 LBS
4318.0 g / 42.4 N
50 mm Raw steel (µ ≈ 0.2) 1.07 kg / 2.37 LBS
1074.0 g / 10.5 N

Table 3: Wall mounting (shearing) - vertical pull
MPL 75x75x20 / N38

Surface type Friction coefficient / % Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% of nominal force
36.05 kg / 79.49 LBS
36054.0 g / 353.7 N
Painted steel (standard)
µ = 0.2 20% of nominal force
24.04 kg / 52.99 LBS
24036.0 g / 235.8 N
Oily/slippery steel
µ = 0.1 10% of nominal force
12.02 kg / 26.50 LBS
12018.0 g / 117.9 N
Magnet with anti-slip rubber
µ = 0.5 50% of nominal force
60.09 kg / 132.48 LBS
60090.0 g / 589.5 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 75x75x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
4.01 kg / 8.83 LBS
4006.0 g / 39.3 N
1 mm
8%
10.01 kg / 22.08 LBS
10015.0 g / 98.2 N
2 mm
17%
20.03 kg / 44.16 LBS
20030.0 g / 196.5 N
3 mm
25%
30.05 kg / 66.24 LBS
30045.0 g / 294.7 N
5 mm
42%
50.08 kg / 110.40 LBS
50075.0 g / 491.2 N
10 mm
83%
100.15 kg / 220.79 LBS
100150.0 g / 982.5 N
11 mm
92%
110.16 kg / 242.87 LBS
110165.0 g / 1080.7 N
12 mm
100%
120.18 kg / 264.95 LBS
120180.0 g / 1179.0 N

Table 5: Working in heat (material behavior) - power drop
MPL 75x75x20 / N38

Magnet temperature (°C) Force change relative to 20°C Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 120.18 kg / 264.95 LBS
120180.0 g / 1179.0 N
Estimate
40 °C -4.4% 114.95 kg / 253.42 LBS
114950.2 g / 1127.7 N
Estimate
60 °C -8.6% 109.84 kg / 242.15 LBS
109836.8 g / 1077.5 N
Estimate
80 °C -12.8% 104.84 kg / 231.13 LBS
104839.7 g / 1028.5 N
Material limit
100 °C — — Out of range — no model

Table 6: Two magnets (attraction) - field collision
MPL 75x75x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 248.60 kg / 548.07 LBS
4 278 Gs
37.29 kg / 82.21 LBS
37290 g / 365.8 N
N/A
1 mm 244.87 kg / 539.84 LBS
5 315 Gs
36.73 kg / 80.98 LBS
36730 g / 360.3 N
220.38 kg / 485.86 LBS
~0 Gs
2 mm 240.95 kg / 531.21 LBS
5 272 Gs
36.14 kg / 79.68 LBS
36143 g / 354.6 N
216.86 kg / 478.09 LBS
~0 Gs
3 mm 236.94 kg / 522.37 LBS
5 228 Gs
35.54 kg / 78.36 LBS
35542 g / 348.7 N
213.25 kg / 470.13 LBS
~0 Gs
5 mm 228.67 kg / 504.14 LBS
5 136 Gs
34.30 kg / 75.62 LBS
34301 g / 336.5 N
205.81 kg / 453.72 LBS
~0 Gs
10 mm 206.96 kg / 456.27 LBS
4 886 Gs
31.04 kg / 68.44 LBS
31044 g / 304.5 N
186.26 kg / 410.64 LBS
~0 Gs
20 mm 162.60 kg / 358.47 LBS
4 331 Gs
24.39 kg / 53.77 LBS
24390 g / 239.3 N
146.34 kg / 322.63 LBS
~0 Gs
50 mm 63.34 kg / 139.64 LBS
2 703 Gs
9.50 kg / 20.95 LBS
9501 g / 93.2 N
57.01 kg / 125.68 LBS
~0 Gs
60 mm 44.65 kg / 98.44 LBS
2 269 Gs
6.70 kg / 14.77 LBS
6698 g / 65.7 N
40.19 kg / 88.59 LBS
~0 Gs
70 mm 31.36 kg / 69.13 LBS
1 902 Gs
4.70 kg / 10.37 LBS
4703 g / 46.1 N
28.22 kg / 62.22 LBS
~0 Gs
80 mm 22.05 kg / 48.62 LBS
1 595 Gs
3.31 kg / 7.29 LBS
3308 g / 32.5 N
19.85 kg / 43.76 LBS
~0 Gs
90 mm 15.59 kg / 34.37 LBS
1 341 Gs
2.34 kg / 5.16 LBS
2339 g / 22.9 N
14.03 kg / 30.94 LBS
~0 Gs
100 mm 11.11 kg / 24.49 LBS
1 132 Gs
1.67 kg / 3.67 LBS
1666 g / 16.3 N
10.00 kg / 22.04 LBS
~0 Gs

Table 7: Axial field levels — not safety zones
MPL 75x75x20 / N38

Field level (Gs) mT Model distance (cm)
< 5 Gs < 0.5 mT 34.5 cm
< 10 Gs < 1.0 mT 27.0 cm
< 20 Gs < 2.0 mT 21.0 cm
< 40 Gs < 4.0 mT 16.5 cm
< 50 Gs < 5.0 mT 15.0 cm
< 400 Gs < 40.0 mT 6.5 cm
< 600 Gs < 60.0 mT 5.0 cm

Table 8: Collisions (cracking risk) - warning
MPL 75x75x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.35 km/h
(4.82 m/s)
9.80 J
30 mm 23.97 km/h
(6.66 m/s)
18.71 J
50 mm 25.39 km/h
(7.05 m/s)
20.98 J
100 mm 25.87 km/h
(7.19 m/s)
21.79 J

Table 9: Anti-corrosion coating durability
MPL 75x75x20 / 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 75x75x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 167 290 Mx 1672.9 µWb
Pc Coefficient 0.33 Low (Flat)

Table 11: Physics of underwater searching
MPL 75x75x20 / N38

Environment Effective steel pull Effect
Air (land) 120.18 kg Standard
Water (riverbed) 137.61 kg
(+17.43 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

1. Sliding resistance

*Caution: On a vertical wall, the magnet retains merely approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Heat tolerance

N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.

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.

Technical specification and ecology

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%

Sustainability

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: 020587-2026
Measurement Calculator

Pulling force


Magnetic Induction

Other offers

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 75x75x20 mm and a weight of 843.75 g, guarantees premium class connection. As a block magnet with high power (approx. 120.18 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is sliding 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 120.18 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.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 120.18 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 75x75x20 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 75x75x20 / N38 model is magnetized through the thickness (dimension 20 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 75x75x20 mm, which, at a weight of 843.75 g, makes it an element with high energy density. It is a magnetic block with dimensions 75x75x20 mm and a self-weight of 843.75 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after approximately ten years – the drop in strength is only ~1% (theoretically),
  • Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
  • By using a lustrous coating of silver, the element acquires an aesthetic look,
  • Magnetic induction on the working part of the magnet remains exceptional,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the option of flexible forming and adaptation to specialized needs, magnetic components can be manufactured in a variety of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in modern industrial fields – they find application in computer drives, drive modules, diagnostic systems, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Cons

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Limited possibility of creating nuts in the magnet and complex forms - recommended is cover - magnet mounting.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum lifting capacity of the magnet – what affects it?

Information about lifting capacity was defined for optimal configuration, including:
  • with the application of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a thickness minimum 10 mm
  • with a plane cleaned and smooth
  • with total lack of distance (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Bear in mind that the working load will differ depending on the following factors, in order of importance:
  • Distance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Load vector – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
Crushing risk

Mind your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Choking Hazard

Always store magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.

Electronic hazard

Powerful magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Life threat

Patients with a ICD have to keep an absolute distance from magnets. The magnetic field can disrupt the functioning of the implant.

Magnetic interference

Navigation devices and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Dust is flammable

Powder created during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Respect the power

Exercise caution. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.

Risk of cracking

Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.

Sensitization to coating

Certain individuals experience a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We recommend use protective gloves.

Heat warning

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

Safety First! More info about risks in the article: Safety of working with magnets.