Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

MPL 50x20x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020165

GTIN/EAN: 5906301811718

5.00
Load capacity 29.99 kg / 294.15 N Magnetic Induction 337.18 mT / 3372 Gs
length
50 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
75 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

35.00net / pcs

43.05 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity
Net
Gross
price from 1 pcs
35.00 zł
43.05 zł
price from 20 pcs
32.90 zł
40.47 zł
price from 80 pcs
30.80 zł
37.88 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.

Want to talk magnets?

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.

Order by 14:00 and we’ll ship today!

Technical of the product - MPL 50x20x10 / N38 - lamellar magnet

Specification / characteristics - MPL 50x20x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020165
GTIN/EAN 5906301811718
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 10 mm [±0,1 mm]
Weight 75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 29.99 kg / 294.15 N
Magnetic Induction ~ ? 337.18 mT / 3372 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 50x20x10 / 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 simulation of the product - technical parameters

Presented data constitute the outcome of a engineering calculation. Values rely on algorithms for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MPL 50x20x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3371 Gs
337.1 mT
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
crushing
1 mm 3158 Gs
315.8 mT
26.32 kg / 58.03 pounds
26323.3 g / 258.2 N
crushing
2 mm 2932 Gs
293.2 mT
22.69 kg / 50.02 pounds
22687.6 g / 222.6 N
crushing
3 mm 2703 Gs
270.3 mT
19.29 kg / 42.52 pounds
19286.7 g / 189.2 N
crushing
5 mm 2266 Gs
226.6 mT
13.55 kg / 29.86 pounds
13546.3 g / 132.9 N
crushing
10 mm 1419 Gs
141.9 mT
5.31 kg / 11.71 pounds
5313.0 g / 52.1 N
warning
15 mm 908 Gs
90.8 mT
2.17 kg / 4.79 pounds
2174.5 g / 21.3 N
warning
20 mm 603 Gs
60.3 mT
0.96 kg / 2.12 pounds
961.0 g / 9.4 N
safe
30 mm 296 Gs
29.6 mT
0.23 kg / 0.51 pounds
231.0 g / 2.3 N
safe
50 mm 97 Gs
9.7 mT
0.02 kg / 0.05 pounds
24.8 g / 0.2 N
safe

Table 2: Shear load (wall)
MPL 50x20x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
1 mm Stal (~0.2) 5.26 kg / 11.61 pounds
5264.0 g / 51.6 N
2 mm Stal (~0.2) 4.54 kg / 10.00 pounds
4538.0 g / 44.5 N
3 mm Stal (~0.2) 3.86 kg / 8.51 pounds
3858.0 g / 37.8 N
5 mm Stal (~0.2) 2.71 kg / 5.97 pounds
2710.0 g / 26.6 N
10 mm Stal (~0.2) 1.06 kg / 2.34 pounds
1062.0 g / 10.4 N
15 mm Stal (~0.2) 0.43 kg / 0.96 pounds
434.0 g / 4.3 N
20 mm Stal (~0.2) 0.19 kg / 0.42 pounds
192.0 g / 1.9 N
30 mm Stal (~0.2) 0.05 kg / 0.10 pounds
46.0 g / 0.5 N
50 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 50x20x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
9.00 kg / 19.83 pounds
8997.0 g / 88.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.00 kg / 13.22 pounds
5998.0 g / 58.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.00 kg / 6.61 pounds
2999.0 g / 29.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
15.00 kg / 33.06 pounds
14995.0 g / 147.1 N

Table 4: Material efficiency (saturation) - power losses
MPL 50x20x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.50 kg / 3.31 pounds
1499.5 g / 14.7 N
1 mm
13%
3.75 kg / 8.26 pounds
3748.8 g / 36.8 N
2 mm
25%
7.50 kg / 16.53 pounds
7497.5 g / 73.6 N
3 mm
38%
11.25 kg / 24.79 pounds
11246.3 g / 110.3 N
5 mm
63%
18.74 kg / 41.32 pounds
18743.8 g / 183.9 N
10 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
11 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
12 mm
100%
29.99 kg / 66.12 pounds
29990.0 g / 294.2 N

Table 5: Working in heat (material behavior) - resistance threshold
MPL 50x20x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 29.99 kg / 66.12 pounds
29990.0 g / 294.2 N
OK
40 °C -2.2% 29.33 kg / 64.66 pounds
29330.2 g / 287.7 N
OK
60 °C -4.4% 28.67 kg / 63.21 pounds
28670.4 g / 281.3 N
80 °C -6.6% 28.01 kg / 61.75 pounds
28010.7 g / 274.8 N
100 °C -28.8% 21.35 kg / 47.07 pounds
21352.9 g / 209.5 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 50x20x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 70.06 kg / 154.45 pounds
4 789 Gs
10.51 kg / 23.17 pounds
10509 g / 103.1 N
N/A
1 mm 65.83 kg / 145.13 pounds
6 535 Gs
9.87 kg / 21.77 pounds
9874 g / 96.9 N
59.25 kg / 130.61 pounds
~0 Gs
2 mm 61.49 kg / 135.57 pounds
6 316 Gs
9.22 kg / 20.34 pounds
9224 g / 90.5 N
55.34 kg / 122.01 pounds
~0 Gs
3 mm 57.20 kg / 126.10 pounds
6 092 Gs
8.58 kg / 18.92 pounds
8580 g / 84.2 N
51.48 kg / 113.49 pounds
~0 Gs
5 mm 48.94 kg / 107.89 pounds
5 635 Gs
7.34 kg / 16.18 pounds
7341 g / 72.0 N
44.05 kg / 97.10 pounds
~0 Gs
10 mm 31.64 kg / 69.76 pounds
4 531 Gs
4.75 kg / 10.46 pounds
4747 g / 46.6 N
28.48 kg / 62.79 pounds
~0 Gs
20 mm 12.41 kg / 27.36 pounds
2 838 Gs
1.86 kg / 4.10 pounds
1862 g / 18.3 N
11.17 kg / 24.63 pounds
~0 Gs
50 mm 1.07 kg / 2.35 pounds
832 Gs
0.16 kg / 0.35 pounds
160 g / 1.6 N
0.96 kg / 2.12 pounds
~0 Gs
60 mm 0.54 kg / 1.19 pounds
592 Gs
0.08 kg / 0.18 pounds
81 g / 0.8 N
0.49 kg / 1.07 pounds
~0 Gs
70 mm 0.29 kg / 0.64 pounds
433 Gs
0.04 kg / 0.10 pounds
43 g / 0.4 N
0.26 kg / 0.57 pounds
~0 Gs
80 mm 0.16 kg / 0.36 pounds
324 Gs
0.02 kg / 0.05 pounds
24 g / 0.2 N
0.15 kg / 0.32 pounds
~0 Gs
90 mm 0.10 kg / 0.21 pounds
248 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
0.09 kg / 0.19 pounds
~0 Gs
100 mm 0.06 kg / 0.13 pounds
194 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
0.05 kg / 0.11 pounds
~0 Gs

Table 7: Hazards (implants) - precautionary measures
MPL 50x20x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.5 cm
Hearing aid 10 Gs (1.0 mT) 12.0 cm
Mechanical watch 20 Gs (2.0 mT) 9.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 7.5 cm
Remote 50 Gs (5.0 mT) 7.0 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Collisions (cracking risk) - collision effects
MPL 50x20x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.58 km/h
(6.27 m/s)
1.47 J
30 mm 24.72 km/h
(6.87 m/s)
1.77 J
50 mm 24.83 km/h
(6.90 m/s)
1.78 J
100 mm 24.86 km/h
(6.90 m/s)
1.79 J

Table 9: Corrosion resistance
MPL 50x20x10 / 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 50x20x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 32 980 Mx 329.8 µWb
Pc Coefficient 0.38 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 50x20x10 / N38

Environment Effective steel pull Effect
Air (land) 29.99 kg Standard
Water (riverbed) 34.34 kg
(+4.35 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. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains just ~20% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.38

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: 020165-2026
Measurement Calculator

Magnet pull force


Magnetic Field

See more deals

Component MPL 50x20x10 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 29.99 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.
The key to success is sliding 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. Watch your fingers! Magnets with a force of 29.99 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 50x20x10 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 29.99 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. 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.
Standardly, the MPL 50x20x10 / N38 model is magnetized axially (dimension 10 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (50x20 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
This model is characterized by dimensions 50x20x10 mm, which, at a weight of 75 g, makes it an element with high energy density. It is a magnetic block with dimensions 50x20x10 mm and a self-weight of 75 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of rare earth magnets.

Strengths

Apart from their consistent power, neodymium magnets have these key benefits:
  • Their magnetic field is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
  • They are noted for resistance to demagnetization induced by external disturbances,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Due to the potential of precise forming and adaptation to specialized needs, neodymium magnets can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
  • Fundamental importance in electronics industry – they are commonly used in data components, electric drive systems, medical devices, and modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat affects it?

Holding force of 29.99 kg is a measurement result executed under standard conditions:
  • using a sheet made of mild steel, functioning as a magnetic yoke
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a plane free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Lifting capacity in practice – influencing factors

Holding efficiency impacted by specific conditions, including (from most important):
  • Air gap (between the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets
Handling guide

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Magnet fragility

Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.

Nickel allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease handling magnets and wear gloves.

Cards and drives

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can destroy these devices and wipe information from cards.

Dust is flammable

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Magnetic interference

An intense magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Keep magnets close to a device to avoid breaking the sensors.

Power loss in heat

Watch the temperature. Exposing the magnet to high heat will destroy its magnetic structure and strength.

Physical harm

Large magnets can smash fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Product not for children

Always store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.

Implant safety

Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Important! Want to know more? Check our post: Are neodymium magnets dangerous?