Neodymium magnets – strongest on the market

Looking for massive power in small size? Our range includes rich assortment of disc, cylindrical and ring magnets. Perfect for for home use, workshop and industrial tasks. Check our offer in stock.

see full offer

Magnets for seabed exploration

Begin your hobby related to seabed exploration! Our specialized grips (F200, F400) provide grip certainty and huge lifting capacity. Solid, corrosion-resistant housing and strong lines will perform in rivers and lakes.

choose searching equipment

Magnetic mounts for industry

Reliable solutions for fixing without drilling. Threaded grips (M8, M10, M12) guarantee instant organization of work on warehouses. They are indispensable mounting lighting, sensors and banners.

check technical specs

🚀 Lightning processing: orders by 14:00 shipped within 24h!

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
Want to negotiate?

Call us now +48 888 99 98 98 otherwise contact us by means of form the contact section.
Parameters as well as structure of magnetic components can be verified using our our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

Technical data 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

Engineering simulation of the magnet - technical parameters

These information are the result of a mathematical analysis. Results are based on models for the class Nd2Fe14B. Operational performance might slightly differ. Use these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
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
medium risk
5 mm 1395 Gs
139.5 mT
6.32 kg / 13.93 LBS
6320.3 g / 62.0 N
medium risk
10 mm 870 Gs
87.0 mT
2.46 kg / 5.42 LBS
2459.4 g / 24.1 N
medium risk
15 mm 549 Gs
54.9 mT
0.98 kg / 2.15 LBS
976.9 g / 9.6 N
low risk
20 mm 359 Gs
35.9 mT
0.42 kg / 0.92 LBS
418.9 g / 4.1 N
low risk
30 mm 172 Gs
17.2 mT
0.10 kg / 0.21 LBS
95.7 g / 0.9 N
low risk
50 mm 54 Gs
5.4 mT
0.01 kg / 0.02 LBS
9.5 g / 0.1 N
low risk

Table 2: Shear 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: Wall mounting (sliding) - vertical pull
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 (substrate influence) - power losses
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) - thermal limit
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: Two magnets (repulsion) - field collision
MPL 50x20x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (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
Mechanical watch 20 Gs (2.0 mT) 7.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 6.0 cm
Remote 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: Impact energy (cracking risk) - warning
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: Surface protection spec
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: Physics of underwater searching
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%
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. Sliding resistance

*Note: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Steel saturation

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.21

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 and environmental data
Elemental analysis
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: 020473-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other proposals

Model MPL 50x20x5 / 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 124.48 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects 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 12.69 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. 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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 50x20x5 / 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 roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 50x20x5 / N38 model is magnetized axially (dimension 5 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. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 50x20x5 mm, which, at a weight of 37.5 g, makes it an element with high energy density. 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.

Strengths as well as weaknesses of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose power, even during around 10 years – the drop in strength is only ~1% (based on measurements),
  • They are resistant to demagnetization induced by external magnetic fields,
  • A magnet with a smooth silver surface has an effective appearance,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Thanks to modularity in forming and the capacity to customize to unusual requirements,
  • Versatile presence in high-tech industry – they serve a role in data components, drive modules, medical devices, and other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power 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
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameterswhat it depends on?

The specified lifting capacity refers to the maximum value, measured under ideal test conditions, namely:
  • using a base made of mild steel, serving as a circuit closing element
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with an ground touching surface
  • without any air gap between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

In practice, the actual holding force depends on several key aspects, presented from the most important:
  • Gap (between the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Plate thickness – too thin steel does not accept the full field, causing part of the power to be escaped into the air.
  • Steel type – mild steel gives the best results. Alloy admixtures decrease magnetic properties and holding force.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Safe handling of NdFeB magnets
Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Physical harm

Big blocks can break fingers instantly. Under no circumstances place your hand betwixt two strong magnets.

Powerful field

Use magnets with awareness. Their immense force can shock even professionals. Be vigilant and do not underestimate their power.

Metal Allergy

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or choose coated magnets.

Phone sensors

A strong magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Do not bring magnets near a device to prevent breaking the sensors.

Danger to the youngest

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Store away from kids and pets.

Threat to electronics

Data protection: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Beware of splinters

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets will cause them shattering into shards.

Do not overheat magnets

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. Damage is permanent.

Combustion hazard

Combustion risk: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Danger! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98