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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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Technical specification 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

Engineering simulation of the assembly - data

These information constitute the direct effect of a physical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Operational conditions might slightly 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 pounds
287380.0 g / 2819.2 N
critical level
1 mm 4241 Gs
424.1 mT
260.91 kg / 575.21 pounds
260910.0 g / 2559.5 N
critical level
2 mm 4028 Gs
402.8 mT
235.43 kg / 519.04 pounds
235433.0 g / 2309.6 N
critical level
3 mm 3818 Gs
381.8 mT
211.49 kg / 466.26 pounds
211490.2 g / 2074.7 N
critical level
5 mm 3412 Gs
341.2 mT
168.87 kg / 372.30 pounds
168870.4 g / 1656.6 N
critical level
10 mm 2539 Gs
253.9 mT
93.54 kg / 206.22 pounds
93539.2 g / 917.6 N
critical level
15 mm 1902 Gs
190.2 mT
52.48 kg / 115.70 pounds
52481.2 g / 514.8 N
critical level
20 mm 1457 Gs
145.7 mT
30.79 kg / 67.88 pounds
30789.8 g / 302.0 N
critical level
30 mm 920 Gs
92.0 mT
12.29 kg / 27.09 pounds
12288.2 g / 120.5 N
critical level
50 mm 456 Gs
45.6 mT
3.02 kg / 6.65 pounds
3016.4 g / 29.6 N
strong

Table 2: Sliding 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 pounds
57476.0 g / 563.8 N
1 mm Stal (~0.2) 52.18 kg / 115.04 pounds
52182.0 g / 511.9 N
2 mm Stal (~0.2) 47.09 kg / 103.81 pounds
47086.0 g / 461.9 N
3 mm Stal (~0.2) 42.30 kg / 93.25 pounds
42298.0 g / 414.9 N
5 mm Stal (~0.2) 33.77 kg / 74.46 pounds
33774.0 g / 331.3 N
10 mm Stal (~0.2) 18.71 kg / 41.24 pounds
18708.0 g / 183.5 N
15 mm Stal (~0.2) 10.50 kg / 23.14 pounds
10496.0 g / 103.0 N
20 mm Stal (~0.2) 6.16 kg / 13.58 pounds
6158.0 g / 60.4 N
30 mm Stal (~0.2) 2.46 kg / 5.42 pounds
2458.0 g / 24.1 N
50 mm Stal (~0.2) 0.60 kg / 1.33 pounds
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 pounds
86214.0 g / 845.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
57.48 kg / 126.71 pounds
57476.0 g / 563.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
28.74 kg / 63.36 pounds
28738.0 g / 281.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
143.69 kg / 316.78 pounds
143690.0 g / 1409.6 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 200x30x30 / N38

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

Table 5: Thermal stability (material behavior) - 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 pounds
287380.0 g / 2819.2 N
OK
40 °C -2.2% 281.06 kg / 619.63 pounds
281057.6 g / 2757.2 N
OK
60 °C -4.4% 274.74 kg / 605.69 pounds
274735.3 g / 2695.2 N
80 °C -6.6% 268.41 kg / 591.75 pounds
268412.9 g / 2633.1 N
100 °C -28.8% 204.61 kg / 451.10 pounds
204614.6 g / 2007.3 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 200x30x30 / N38

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

Table 7: Protective zones (implants) - 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 (cracking risk) - collision effects
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: Construction 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: Underwater work (magnet fishing)
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%
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

*Warning: On a vertical wall, the magnet holds just a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*For standard magnets, 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

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
Material specification
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: 020125-2026
Quick Unit Converter
Magnet pull force

Magnetic Induction

Other products

Model MPL 200x30x30 / N38 features a low profile and industrial pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 287.38 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 287.38 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of wind generators and material handling systems. They work great as invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 200x30x30 / N38, it is best to use 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. 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. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 200 mm (length), 30 mm (width), and 30 mm (thickness). It is a magnetic block with dimensions 200x30x30 mm and a self-weight of 1350 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of neodymium magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • Their strength is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss due to opposing magnetic fields,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnets are distinguished by very high magnetic induction on the outer layer,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Due to the possibility of flexible molding and customization to unique projects, neodymium magnets can be created in a variety of forms and dimensions, which expands the range of possible applications,
  • Huge importance in future technologies – they find application in mass storage devices, drive modules, medical devices, as well as technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets decrease 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 stability even at temperatures up to 230°C
  • 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 secure oxidation and corrosion.
  • We recommend a housing - magnetic holder, due to difficulties in producing nuts inside the magnet and complex forms.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to 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

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength concerns the limit force, obtained under ideal test conditions, namely:
  • on a base made of mild steel, perfectly concentrating the magnetic flux
  • possessing a massiveness of min. 10 mm to avoid saturation
  • characterized by even structure
  • under conditions of ideal adhesion (surface-to-surface)
  • during pulling in a direction vertical to the plane
  • at room temperature

Magnet lifting force in use – key factors

Bear in mind that the application force will differ influenced by the following factors, starting with the most relevant:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Heat – 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 was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate reduces the holding force.

Warnings
Danger to the youngest

NdFeB magnets are not toys. Eating multiple magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Do not drill into magnets

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

Magnets are brittle

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Magnetic interference

A powerful magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.

Cards and drives

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.

Handling guide

Use magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their force.

ICD Warning

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Bodily injuries

Pinching hazard: The pulling power is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Allergy Warning

Medical facts indicate that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, prevent direct skin contact and opt for versions in plastic housing.

Thermal limits

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

Safety First! Details about risks in the article: Magnet Safety Guide.