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MPL 200x30x30 / N38 - lamellar magnet

lamellar magnet

Catalog no 020125

GTIN/EAN: 5906301811312

5.00
Load capacity 287.38 kg / 2819.19 N Magnetic Induction 445.15 mT / 4451 Gs
length
200 mm [±0,1 mm]
Width
30 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
1350 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

457.95net / pcs

563.28 zł with VAT (23% VAT) / pcs

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Gross
price from 1 pcs
457.95 zł
563.28 zł
price from 2 pcs
412.16 zł
506.95 zł
price from 3 pcs
403.00 zł
495.69 zł

Frequently asked questions

How much will a block magnet really hold?
The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.
What is the maximum working temperature?
Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.
What safety factor should I allow?
At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

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.

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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 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
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 modeling of the assembly - data

These values are the result of a mathematical analysis. Results rely on algorithms for the class Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs gap) - 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 pounds
287380.0 g / 2819.2 N
crushing
1 mm 4241 Gs
424.1 mT
260.91 kg / 575.21 pounds
260910.0 g / 2559.5 N
crushing
2 mm 4028 Gs
402.8 mT
235.43 kg / 519.04 pounds
235433.0 g / 2309.6 N
crushing
3 mm 3818 Gs
381.8 mT
211.49 kg / 466.26 pounds
211490.2 g / 2074.7 N
crushing
5 mm 3412 Gs
341.2 mT
168.87 kg / 372.30 pounds
168870.4 g / 1656.6 N
crushing
10 mm 2539 Gs
253.9 mT
93.54 kg / 206.22 pounds
93539.2 g / 917.6 N
crushing
15 mm 1902 Gs
190.2 mT
52.48 kg / 115.70 pounds
52481.2 g / 514.8 N
crushing
20 mm 1457 Gs
145.7 mT
30.79 kg / 67.88 pounds
30789.8 g / 302.0 N
crushing
30 mm 920 Gs
92.0 mT
12.29 kg / 27.09 pounds
12288.2 g / 120.5 N
crushing
50 mm 456 Gs
45.6 mT
3.02 kg / 6.65 pounds
3016.4 g / 29.6 N
strong

Table 2: Shear 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 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: Wall mounting (sliding) - 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) - thermal limit
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) Sliding Force (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 (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
Car key 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 18.23 km/h
(5.06 m/s)
17.30 J
30 mm 21.78 km/h
(6.05 m/s)
24.71 J
50 mm 22.32 km/h
(6.20 m/s)
25.95 J
100 mm 22.55 km/h
(6.26 m/s)
26.48 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: 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: 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%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Vertical hold

*Caution: On a vertical surface, the magnet holds merely ~20% of its max power.

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 grade, the critical limit 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.

Engineering data and GPSR

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: 020125-2026
Magnet Unit Converter

Magnet pull force


Magnetic Field

Other deals

Component MPL 200x30x30 / N38 features a flat shape and professional 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 off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
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.
Plate magnets MPL 200x30x30 / N38 are the foundation for many industrial devices, such as filters catching filings 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. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to roughen and wash 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. 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 200x30x30 mm, which, at a weight of 1350 g, makes it an element with high energy density. 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 product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for nearly 10 years – the loss is just ~1% (according to analyses),
  • They do not lose their magnetic properties even under close interference source,
  • In other words, due to the smooth surface of gold, the element looks attractive,
  • Magnets are characterized by exceptionally strong magnetic induction on the working surface,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in designing and the ability to adapt to client solutions,
  • Significant place in future technologies – they are commonly used in magnetic memories, electric motors, medical devices, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce 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 usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of producing threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting capacity of the magnetwhat affects it?

The force parameter is a result of laboratory testing performed under the following configuration:
  • with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a surface free of scratches
  • under conditions of ideal adhesion (metal-to-metal)
  • under vertical force direction (90-degree angle)
  • in temp. approx. 20°C

Practical aspects of lifting capacity – factors

It is worth knowing that the application force will differ influenced by elements below, in order of importance:
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Safe distance

Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Life threat

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

Crushing risk

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.

Eye protection

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Compass and GPS

Note: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.

Do not give to children

Product intended for adults. Small elements can be swallowed, leading to severe trauma. Keep out of reach of children and animals.

Fire risk

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Conscious usage

Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.

Maximum temperature

Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Allergic reactions

It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands or select coated magnets.

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