Powerful neodymium magnets: discs and cylinders

Looking for huge power in small size? Our range includes complete range of various shapes and sizes. Best choice for home use, workshop and industrial tasks. See products in stock.

see magnet catalog

Grips for underwater searches

Begin your hobby involving underwater treasure hunting! Our specialized grips (F200, F400) provide grip certainty and huge lifting capacity. Stainless steel construction and reinforced ropes will perform in rivers and lakes.

choose searching equipment

Industrial magnetic grips mounting

Professional solutions for fixing non-invasive. Threaded grips (M8, M10, M12) provide instant organization of work on production halls. Perfect for mounting lighting, sensors and ads.

check industrial applications

🚚 Order by 14:00 – we'll ship same day!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

MPL 50x20x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020473

GTIN/EAN: 5906301811930

5.00

length

50 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

37.5 g

Magnetization Direction

↑ axial

Load capacity

12.69 kg / 124.48 N

Magnetic Induction

197.73 mT / 1977 Gs

Coating

[NiCuNi] Nickel

14.56 with VAT / pcs + price for transport

11.84 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
11.84 ZŁ
14.56 ZŁ
price from 60 pcs
11.13 ZŁ
13.69 ZŁ
price from 220 pcs
10.42 ZŁ
12.82 ZŁ
Not sure about your choice?

Call us +48 888 99 98 98 or drop us a message by means of inquiry form the contact page.
Parameters as well as shape of a neodymium magnet can be verified with our magnetic calculator.

Same-day processing for orders placed before 14:00.

Technical specification of the product - MPL 50x20x5 / N38 - lamellar magnet

Specification / characteristics - MPL 50x20x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020473
GTIN/EAN 5906301811930
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 50 mm [±0,1 mm]
Width 20 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 37.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 12.69 kg / 124.48 N
Magnetic Induction ~ ? 197.73 mT / 1977 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 50x20x5 / 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 product - data

These information constitute the direct effect of a engineering simulation. Results are based on models for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Use these data as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - power drop
MPL 50x20x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1977 Gs
197.7 mT
12.69 kg / 27.98 LBS
12690.0 g / 124.5 N
dangerous!
1 mm 1885 Gs
188.5 mT
11.53 kg / 25.42 LBS
11530.3 g / 113.1 N
dangerous!
2 mm 1772 Gs
177.2 mT
10.20 kg / 22.49 LBS
10199.9 g / 100.1 N
dangerous!
3 mm 1649 Gs
164.9 mT
8.83 kg / 19.47 LBS
8831.3 g / 86.6 N
strong
5 mm 1395 Gs
139.5 mT
6.32 kg / 13.93 LBS
6320.3 g / 62.0 N
strong
10 mm 870 Gs
87.0 mT
2.46 kg / 5.42 LBS
2459.4 g / 24.1 N
strong
15 mm 549 Gs
54.9 mT
0.98 kg / 2.15 LBS
976.9 g / 9.6 N
safe
20 mm 359 Gs
35.9 mT
0.42 kg / 0.92 LBS
418.9 g / 4.1 N
safe
30 mm 172 Gs
17.2 mT
0.10 kg / 0.21 LBS
95.7 g / 0.9 N
safe
50 mm 54 Gs
5.4 mT
0.01 kg / 0.02 LBS
9.5 g / 0.1 N
safe

Table 2: Slippage hold (wall)
MPL 50x20x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.54 kg / 5.60 LBS
2538.0 g / 24.9 N
1 mm Stal (~0.2) 2.31 kg / 5.08 LBS
2306.0 g / 22.6 N
2 mm Stal (~0.2) 2.04 kg / 4.50 LBS
2040.0 g / 20.0 N
3 mm Stal (~0.2) 1.77 kg / 3.89 LBS
1766.0 g / 17.3 N
5 mm Stal (~0.2) 1.26 kg / 2.79 LBS
1264.0 g / 12.4 N
10 mm Stal (~0.2) 0.49 kg / 1.08 LBS
492.0 g / 4.8 N
15 mm Stal (~0.2) 0.20 kg / 0.43 LBS
196.0 g / 1.9 N
20 mm Stal (~0.2) 0.08 kg / 0.19 LBS
84.0 g / 0.8 N
30 mm Stal (~0.2) 0.02 kg / 0.04 LBS
20.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 50x20x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.81 kg / 8.39 LBS
3807.0 g / 37.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.54 kg / 5.60 LBS
2538.0 g / 24.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.27 kg / 2.80 LBS
1269.0 g / 12.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.35 kg / 13.99 LBS
6345.0 g / 62.2 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 50x20x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.63 kg / 1.40 LBS
634.5 g / 6.2 N
1 mm
13%
1.59 kg / 3.50 LBS
1586.3 g / 15.6 N
2 mm
25%
3.17 kg / 6.99 LBS
3172.5 g / 31.1 N
3 mm
38%
4.76 kg / 10.49 LBS
4758.8 g / 46.7 N
5 mm
63%
7.93 kg / 17.49 LBS
7931.2 g / 77.8 N
10 mm
100%
12.69 kg / 27.98 LBS
12690.0 g / 124.5 N
11 mm
100%
12.69 kg / 27.98 LBS
12690.0 g / 124.5 N
12 mm
100%
12.69 kg / 27.98 LBS
12690.0 g / 124.5 N

Table 5: Thermal stability (stability) - power drop
MPL 50x20x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 12.69 kg / 27.98 LBS
12690.0 g / 124.5 N
OK
40 °C -2.2% 12.41 kg / 27.36 LBS
12410.8 g / 121.8 N
OK
60 °C -4.4% 12.13 kg / 26.75 LBS
12131.6 g / 119.0 N
80 °C -6.6% 11.85 kg / 26.13 LBS
11852.5 g / 116.3 N
100 °C -28.8% 9.04 kg / 19.92 LBS
9035.3 g / 88.6 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 50x20x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 24.10 kg / 53.12 LBS
3 371 Gs
3.61 kg / 7.97 LBS
3614 g / 35.5 N
N/A
1 mm 23.06 kg / 50.84 LBS
3 868 Gs
3.46 kg / 7.63 LBS
3459 g / 33.9 N
20.75 kg / 45.75 LBS
~0 Gs
2 mm 21.89 kg / 48.27 LBS
3 769 Gs
3.28 kg / 7.24 LBS
3284 g / 32.2 N
19.71 kg / 43.44 LBS
~0 Gs
3 mm 20.65 kg / 45.53 LBS
3 661 Gs
3.10 kg / 6.83 LBS
3098 g / 30.4 N
18.59 kg / 40.98 LBS
~0 Gs
5 mm 18.07 kg / 39.83 LBS
3 424 Gs
2.71 kg / 5.97 LBS
2710 g / 26.6 N
16.26 kg / 35.84 LBS
~0 Gs
10 mm 12.00 kg / 26.46 LBS
2 790 Gs
1.80 kg / 3.97 LBS
1800 g / 17.7 N
10.80 kg / 23.81 LBS
~0 Gs
20 mm 4.67 kg / 10.30 LBS
1 741 Gs
0.70 kg / 1.54 LBS
701 g / 6.9 N
4.20 kg / 9.27 LBS
~0 Gs
50 mm 0.37 kg / 0.81 LBS
488 Gs
0.06 kg / 0.12 LBS
55 g / 0.5 N
0.33 kg / 0.73 LBS
~0 Gs
60 mm 0.18 kg / 0.40 LBS
343 Gs
0.03 kg / 0.06 LBS
27 g / 0.3 N
0.16 kg / 0.36 LBS
~0 Gs
70 mm 0.10 kg / 0.21 LBS
248 Gs
0.01 kg / 0.03 LBS
14 g / 0.1 N
0.09 kg / 0.19 LBS
~0 Gs
80 mm 0.05 kg / 0.12 LBS
184 Gs
0.01 kg / 0.02 LBS
8 g / 0.1 N
0.05 kg / 0.10 LBS
~0 Gs
90 mm 0.03 kg / 0.07 LBS
140 Gs
0.00 kg / 0.01 LBS
5 g / 0.0 N
0.03 kg / 0.06 LBS
~0 Gs
100 mm 0.02 kg / 0.04 LBS
108 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
0.02 kg / 0.04 LBS
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 50x20x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 12.5 cm
Hearing aid 10 Gs (1.0 mT) 9.5 cm
Timepiece 20 Gs (2.0 mT) 7.5 cm
Mobile device 40 Gs (4.0 mT) 6.0 cm
Car key 50 Gs (5.0 mT) 5.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (cracking risk) - collision effects
MPL 50x20x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 20.68 km/h
(5.74 m/s)
0.62 J
30 mm 32.28 km/h
(8.97 m/s)
1.51 J
50 mm 41.50 km/h
(11.53 m/s)
2.49 J
100 mm 58.67 km/h
(16.30 m/s)
4.98 J

Table 9: Corrosion resistance
MPL 50x20x5 / 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 50x20x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 20 792 Mx 207.9 µWb
Pc Coefficient 0.21 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 50x20x5 / N38

Environment Effective steel pull Effect
Air (land) 12.69 kg Standard
Water (riverbed) 14.53 kg
(+1.84 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly weakens 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) = 0.21

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 and environmental data
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: 020473-2026
Magnet Unit Converter
Magnet pull force

Magnetic Induction

Other proposals

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 50x20x5 mm and a weight of 37.5 g, guarantees the highest quality connection. As a magnetic bar with high power (approx. 12.69 kg), this product is available immediately from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
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 50x20x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, 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 50x20x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 12.69 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 50x20x5 / 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. 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: 50 mm (length), 20 mm (width), and 5 mm (thickness). It is a magnetic block with dimensions 50x20x5 mm and a self-weight of 37.5 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnetic induction on the working layer of the magnet remains very high,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the option of free shaping and adaptation to individualized requirements, neodymium magnets can be manufactured in a variety of shapes and sizes, which amplifies use scope,
  • Huge importance in innovative solutions – they serve a role in magnetic memories, brushless drives, precision medical tools, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force 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
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in realizing nuts and complex shapes in magnets, we recommend using casing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these magnets can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat affects it?

The declared magnet strength represents the peak performance, recorded under optimal environment, specifically:
  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (metal-to-metal)
  • under vertical force vector (90-degree angle)
  • in stable room temperature

Lifting capacity in real conditions – factors

Bear in mind that the application force will differ subject to elements below, in order of importance:
  • Gap (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material composition – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
ICD Warning

Individuals with a ICD must maintain an safe separation from magnets. The magnetism can disrupt the operation of the life-saving device.

Demagnetization risk

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Physical harm

Mind your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Respect the power

Exercise caution. Neodymium magnets act from a distance and snap with huge force, often quicker than you can react.

Material brittleness

NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them breaking into shards.

Metal Allergy

A percentage of the population experience a sensitization to nickel, which is the common plating for neodymium magnets. Frequent touching can result in an allergic reaction. We strongly advise use protective gloves.

Combustion hazard

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

Keep away from electronics

An intense magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Keep magnets close to a device to avoid damaging the sensors.

Data carriers

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Swallowing risk

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

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98