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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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Net
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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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical data - 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 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 simulation of the assembly - technical parameters

Presented data are the result of a engineering analysis. Results rely on models for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.

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

Table 2: Vertical force (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: 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) - 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 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 resistance (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: Two magnets (attraction) - field range
MPL 200x30x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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: Hazards (implants) - 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
Mobile device 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: Dynamics (kinetic energy) - 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: Corrosion resistance
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 (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: 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 ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*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

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.

Engineering data and GPSR

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%

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
Measurement Calculator

Force (pull)


Field Strength

Other deals

Model MPL 200x30x30 / N38 features a low profile and industrial pulling force, making it a perfect solution for building separators and machines. This magnetic block with a force of 2819.19 N is ready for shipment in 24h, allowing for rapid realization of your project. 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.
They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners 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.
For mounting flat magnets MPL 200x30x30 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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.
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. 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). 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.

Advantages as well as disadvantages of rare earth magnets.

Pros

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • They possess excellent resistance to magnetism drop due to external magnetic sources,
  • A magnet with a metallic gold surface has better aesthetics,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in forming and the ability to modify to individual projects,
  • Huge importance in modern industrial fields – they serve a role in HDD drives, brushless drives, diagnostic systems, as well as multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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 immune to moisture, in case of application outdoors
  • Limited ability of producing nuts in the magnet and complicated forms - preferred is cover - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

The specified lifting capacity refers to the limit force, obtained under optimal environment, namely:
  • on a plate made of structural steel, effectively closing the magnetic field
  • with a thickness no less than 10 mm
  • with an ideally smooth touching surface
  • with zero gap (without paint)
  • during detachment in a direction vertical to the plane
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

Bear in mind that the magnet holding will differ depending on elements below, in order of importance:
  • Clearance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of neodymium magnets
Handling rules

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

Dust explosion hazard

Machining of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Health Danger

Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them cracking into small pieces.

Skin irritation risks

A percentage of the population suffer from a hypersensitivity to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause skin redness. We suggest use safety gloves.

Bodily injuries

Risk of injury: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Data carriers

Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Heat sensitivity

Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Threat to navigation

Remember: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Keep away from children

Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.

Danger! Need more info? Read our article: Are neodymium magnets dangerous?