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MPL 200x30x30 / N38 - lamellar magnet

lamellar magnet

Catalog no 020125

GTIN/EAN: 5906301811312

5.00

length

200 mm [±0,1 mm]

Width

30 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

1350 g

Magnetization Direction

↑ axial

Load capacity

287.38 kg / 2819.19 N

Magnetic Induction

445.15 mT / 4451 Gs

Coating

[NiCuNi] Nickel

563.28 with VAT / pcs + price for transport

457.95 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 200x30x30 / N38 - lamellar magnet

Specification / characteristics - MPL 200x30x30 / N38 - lamellar magnet

properties
properties values
Cat. no. 020125
GTIN/EAN 5906301811312
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 200 mm [±0,1 mm]
Width 30 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 1350 g
Magnetization Direction ↑ axial
Load capacity ~ ? 287.38 kg / 2819.19 N
Magnetic Induction ~ ? 445.15 mT / 4451 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 200x30x30 / 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

Engineering simulation of the magnet - data

These values are the outcome of a mathematical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MPL 200x30x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4451 Gs
445.1 mT
287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N
crushing
1 mm 4241 Gs
424.1 mT
260.91 kg / 575.21 LBS
260910.0 g / 2559.5 N
crushing
2 mm 4028 Gs
402.8 mT
235.43 kg / 519.04 LBS
235433.0 g / 2309.6 N
crushing
3 mm 3818 Gs
381.8 mT
211.49 kg / 466.26 LBS
211490.2 g / 2074.7 N
crushing
5 mm 3412 Gs
341.2 mT
168.87 kg / 372.30 LBS
168870.4 g / 1656.6 N
crushing
10 mm 2539 Gs
253.9 mT
93.54 kg / 206.22 LBS
93539.2 g / 917.6 N
crushing
15 mm 1902 Gs
190.2 mT
52.48 kg / 115.70 LBS
52481.2 g / 514.8 N
crushing
20 mm 1457 Gs
145.7 mT
30.79 kg / 67.88 LBS
30789.8 g / 302.0 N
crushing
30 mm 920 Gs
92.0 mT
12.29 kg / 27.09 LBS
12288.2 g / 120.5 N
crushing
50 mm 456 Gs
45.6 mT
3.02 kg / 6.65 LBS
3016.4 g / 29.6 N
strong

Table 2: Vertical hold (wall)
MPL 200x30x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 57.48 kg / 126.71 LBS
57476.0 g / 563.8 N
1 mm Stal (~0.2) 52.18 kg / 115.04 LBS
52182.0 g / 511.9 N
2 mm Stal (~0.2) 47.09 kg / 103.81 LBS
47086.0 g / 461.9 N
3 mm Stal (~0.2) 42.30 kg / 93.25 LBS
42298.0 g / 414.9 N
5 mm Stal (~0.2) 33.77 kg / 74.46 LBS
33774.0 g / 331.3 N
10 mm Stal (~0.2) 18.71 kg / 41.24 LBS
18708.0 g / 183.5 N
15 mm Stal (~0.2) 10.50 kg / 23.14 LBS
10496.0 g / 103.0 N
20 mm Stal (~0.2) 6.16 kg / 13.58 LBS
6158.0 g / 60.4 N
30 mm Stal (~0.2) 2.46 kg / 5.42 LBS
2458.0 g / 24.1 N
50 mm Stal (~0.2) 0.60 kg / 1.33 LBS
604.0 g / 5.9 N

Table 3: Vertical assembly (shearing) - vertical pull
MPL 200x30x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
86.21 kg / 190.07 LBS
86214.0 g / 845.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
57.48 kg / 126.71 LBS
57476.0 g / 563.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
28.74 kg / 63.36 LBS
28738.0 g / 281.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
143.69 kg / 316.78 LBS
143690.0 g / 1409.6 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 200x30x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
9.58 kg / 21.12 LBS
9579.3 g / 94.0 N
1 mm
8%
23.95 kg / 52.80 LBS
23948.3 g / 234.9 N
2 mm
17%
47.90 kg / 105.59 LBS
47896.7 g / 469.9 N
3 mm
25%
71.85 kg / 158.39 LBS
71845.0 g / 704.8 N
5 mm
42%
119.74 kg / 263.98 LBS
119741.7 g / 1174.7 N
10 mm
83%
239.48 kg / 527.97 LBS
239483.3 g / 2349.3 N
11 mm
92%
263.43 kg / 580.77 LBS
263431.7 g / 2584.3 N
12 mm
100%
287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N

Table 5: Thermal stability (stability) - power drop
MPL 200x30x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N
OK
40 °C -2.2% 281.06 kg / 619.63 LBS
281057.6 g / 2757.2 N
OK
60 °C -4.4% 274.74 kg / 605.69 LBS
274735.3 g / 2695.2 N
80 °C -6.6% 268.41 kg / 591.75 LBS
268412.9 g / 2633.1 N
100 °C -28.8% 204.61 kg / 451.10 LBS
204614.6 g / 2007.3 N

Table 6: Two magnets (repulsion) - field collision
MPL 200x30x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 732.71 kg / 1615.35 LBS
5 371 Gs
109.91 kg / 242.30 LBS
109907 g / 1078.2 N
N/A
1 mm 698.96 kg / 1540.95 LBS
8 694 Gs
104.84 kg / 231.14 LBS
104845 g / 1028.5 N
629.07 kg / 1386.85 LBS
~0 Gs
2 mm 665.22 kg / 1466.57 LBS
8 481 Gs
99.78 kg / 219.99 LBS
99784 g / 978.9 N
598.70 kg / 1319.91 LBS
~0 Gs
3 mm 632.29 kg / 1393.97 LBS
8 269 Gs
94.84 kg / 209.10 LBS
94844 g / 930.4 N
569.07 kg / 1254.57 LBS
~0 Gs
5 mm 569.22 kg / 1254.92 LBS
7 846 Gs
85.38 kg / 188.24 LBS
85383 g / 837.6 N
512.30 kg / 1129.42 LBS
~0 Gs
10 mm 430.56 kg / 949.22 LBS
6 823 Gs
64.58 kg / 142.38 LBS
64584 g / 633.6 N
387.50 kg / 854.29 LBS
~0 Gs
20 mm 238.49 kg / 525.78 LBS
5 078 Gs
35.77 kg / 78.87 LBS
35774 g / 350.9 N
214.64 kg / 473.20 LBS
~0 Gs
50 mm 48.45 kg / 106.82 LBS
2 289 Gs
7.27 kg / 16.02 LBS
7268 g / 71.3 N
43.61 kg / 96.13 LBS
~0 Gs
60 mm 31.33 kg / 69.07 LBS
1 841 Gs
4.70 kg / 10.36 LBS
4700 g / 46.1 N
28.20 kg / 62.16 LBS
~0 Gs
70 mm 21.09 kg / 46.49 LBS
1 510 Gs
3.16 kg / 6.97 LBS
3163 g / 31.0 N
18.98 kg / 41.84 LBS
~0 Gs
80 mm 14.67 kg / 32.35 LBS
1 260 Gs
2.20 kg / 4.85 LBS
2201 g / 21.6 N
13.21 kg / 29.12 LBS
~0 Gs
90 mm 10.50 kg / 23.15 LBS
1 066 Gs
1.58 kg / 3.47 LBS
1575 g / 15.5 N
9.45 kg / 20.83 LBS
~0 Gs
100 mm 7.69 kg / 16.95 LBS
912 Gs
1.15 kg / 2.54 LBS
1154 g / 11.3 N
6.92 kg / 15.26 LBS
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 200x30x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 39.5 cm
Hearing aid 10 Gs (1.0 mT) 30.5 cm
Timepiece 20 Gs (2.0 mT) 23.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 18.0 cm
Remote 50 Gs (5.0 mT) 16.5 cm
Payment card 400 Gs (40.0 mT) 5.5 cm
HDD hard drive 600 Gs (60.0 mT) 4.5 cm

Table 8: Collisions (kinetic energy) - warning
MPL 200x30x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.45 km/h
(4.85 m/s)
15.86 J
30 mm 26.16 km/h
(7.27 m/s)
35.64 J
50 mm 33.12 km/h
(9.20 m/s)
57.12 J
100 mm 46.56 km/h
(12.93 m/s)
112.90 J

Table 9: Surface protection spec
MPL 200x30x30 / 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 200x30x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 221 734 Mx 2217.3 µWb
Pc Coefficient 0.45 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 200x30x30 / N38

Environment Effective steel pull Effect
Air (land) 287.38 kg Standard
Water (riverbed) 329.05 kg
(+41.67 kg buoyancy gain)
+14.5%
Corrosion warning: 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 holds only approx. 20-30% of its max power.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) drastically limits the holding force.

3. Temperature resistance

*For N38 grade, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.45

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
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: 020125-2026
Magnet Unit Converter
Pulling force

Magnetic Induction

Other proposals

Model MPL 200x30x30 / N38 features a low profile and professional pulling force, making it an ideal solution for building separators and machines. As a block magnet with high power (approx. 287.38 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating secures 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 287.38 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 200x30x30 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts under tiles, wood, or glass. Customers often choose this model for workshop organization 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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 200x30x30 / N38 model is magnetized axially (dimension 30 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (200x30 mm), which is ideal for flat mounting. 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: 200 mm (length), 30 mm (width), and 30 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 287.38 kg (force ~2819.19 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • Their power remains stable, and after approximately 10 years it decreases only by ~1% (theoretically),
  • Magnets perfectly defend themselves against demagnetization caused by foreign field sources,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
  • 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...
  • Thanks to the potential of accurate molding and adaptation to unique projects, neodymium magnets can be created in a broad palette of forms and dimensions, which makes them more universal,
  • Wide application in innovative solutions – they are used in hard drives, brushless drives, advanced medical instruments, as well as multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually 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.
  • Due to limitations in creating threads and complex forms in magnets, we recommend using a housing - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
  • 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

Pull force analysis

Maximum holding power of the magnet – what it depends on?

The force parameter is a theoretical maximum value conducted under specific, ideal conditions:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • whose transverse dimension equals approx. 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Holding efficiency is influenced by specific conditions, including (from priority):
  • Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be escaped to the other side.
  • Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Crushing force

Protect your hands. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Fire risk

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

ICD Warning

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Material brittleness

NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets leads to them cracking into small pieces.

Permanent damage

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Magnetic interference

A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Electronic hazard

Very strong magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Do not underestimate power

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Swallowing risk

Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.

Skin irritation risks

A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to skin redness. We strongly advise use protective gloves.

Warning! Looking for details? Read our article: Why are neodymium magnets dangerous?