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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

bulk discounts:

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Technical data of the product - 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

Technical modeling of the magnet - report

The following information represent the result of a physical calculation. Values are based on algorithms for the class Nd2Fe14B. Actual parameters may deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.

Table 1: Static force (force vs distance) - interaction chart
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
critical level
1 mm 4241 Gs
424.1 mT
260.91 kg / 575.21 lbs
260910.0 g / 2559.5 N
critical level
2 mm 4028 Gs
402.8 mT
235.43 kg / 519.04 lbs
235433.0 g / 2309.6 N
critical level
3 mm 3818 Gs
381.8 mT
211.49 kg / 466.26 lbs
211490.2 g / 2074.7 N
critical level
5 mm 3412 Gs
341.2 mT
168.87 kg / 372.30 lbs
168870.4 g / 1656.6 N
critical level
10 mm 2539 Gs
253.9 mT
93.54 kg / 206.22 lbs
93539.2 g / 917.6 N
critical level
15 mm 1902 Gs
190.2 mT
52.48 kg / 115.70 lbs
52481.2 g / 514.8 N
critical level
20 mm 1457 Gs
145.7 mT
30.79 kg / 67.88 lbs
30789.8 g / 302.0 N
critical level
30 mm 920 Gs
92.0 mT
12.29 kg / 27.09 lbs
12288.2 g / 120.5 N
critical level
50 mm 456 Gs
45.6 mT
3.02 kg / 6.65 lbs
3016.4 g / 29.6 N
strong

Table 2: Vertical load (vertical surface)
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) - behavior on slippery surfaces
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 (substrate influence) - 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 (attraction) - field collision
MPL 200x30x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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: Hazards (electronics) - warnings
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
Mechanical watch 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 (cracking risk) - 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: Coating parameters (durability)
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: Construction data (Flux)
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. Vertical hold

*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Temperature resistance

*For N38 material, the safety limit is 80°C.

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

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

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.

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%
Environmental data
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
Magnet pull force

Magnetic Induction

Other proposals

Model MPL 200x30x30 / N38 features a flat shape and professional pulling force, making it a perfect 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. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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. To separate the MPL 200x30x30 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. 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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
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. In practice, this means that this magnet has the greatest attraction force on its main planes (200x30 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 200x30x30 mm, which, at a weight of 1350 g, makes it an element with impressive energy density. 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 product meets the standards for N38 grade magnets.

Pros as well as cons of neodymium magnets.

Pros

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after nearly 10 years – the decrease in strength is only ~1% (according to tests),
  • They possess excellent resistance to magnetism drop due to opposing magnetic fields,
  • Thanks to the reflective finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an visually attractive appearance,
  • Neodymium magnets achieve maximum magnetic induction on a their surface, which allows for strong attraction,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to versatility in shaping and the ability to adapt to client solutions,
  • Huge importance in modern technologies – they find application in data components, drive modules, advanced medical instruments, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 realizing threads and complicated shapes in magnets, we recommend using cover - magnetic holder.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Furthermore, small components of these devices can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditionswhat affects it?

Information about lifting capacity was determined for ideal contact conditions, including:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • possessing a thickness of at least 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • with direct contact (no paint)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Holding efficiency impacted by specific conditions, including (from priority):
  • Clearance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets
Threat to navigation

GPS units and smartphones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Magnet fragility

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them cracking into shards.

Thermal limits

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Adults only

Absolutely store magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are tragic.

Medical interference

Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Conscious usage

Handle magnets consciously. Their huge power can shock even experienced users. Plan your moves and respect their power.

Crushing risk

Pinching hazard: The attraction force is so immense that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Dust explosion hazard

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Electronic devices

Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).

Skin irritation risks

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select coated magnets.

Warning! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98