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

MPL 50x20x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020473

GTIN/EAN: 5906301811930

5.00
Load capacity 12.69 kg / 124.48 N Magnetic Induction 197.73 mT / 1977 Gs
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
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

11.84net / pcs

14.56 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity
Net
Gross
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

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!

Detailed specification - 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 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 product - data

Presented data represent the direct effect of a mathematical analysis. Results were calculated on models for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Use these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs gap) - 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 pounds
12690.0 g / 124.5 N
dangerous!
1 mm 1885 Gs
188.5 mT
11.53 kg / 25.42 pounds
11530.3 g / 113.1 N
dangerous!
2 mm 1772 Gs
177.2 mT
10.20 kg / 22.49 pounds
10199.9 g / 100.1 N
dangerous!
3 mm 1649 Gs
164.9 mT
8.83 kg / 19.47 pounds
8831.3 g / 86.6 N
strong
5 mm 1395 Gs
139.5 mT
6.32 kg / 13.93 pounds
6320.3 g / 62.0 N
strong
10 mm 870 Gs
87.0 mT
2.46 kg / 5.42 pounds
2459.4 g / 24.1 N
strong
15 mm 549 Gs
54.9 mT
0.98 kg / 2.15 pounds
976.9 g / 9.6 N
safe
20 mm 359 Gs
35.9 mT
0.42 kg / 0.92 pounds
418.9 g / 4.1 N
safe
30 mm 172 Gs
17.2 mT
0.10 kg / 0.21 pounds
95.7 g / 0.9 N
safe
50 mm 54 Gs
5.4 mT
0.01 kg / 0.02 pounds
9.5 g / 0.1 N
safe

Table 2: Shear load (wall)
MPL 50x20x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.54 kg / 5.60 pounds
2538.0 g / 24.9 N
1 mm Stal (~0.2) 2.31 kg / 5.08 pounds
2306.0 g / 22.6 N
2 mm Stal (~0.2) 2.04 kg / 4.50 pounds
2040.0 g / 20.0 N
3 mm Stal (~0.2) 1.77 kg / 3.89 pounds
1766.0 g / 17.3 N
5 mm Stal (~0.2) 1.26 kg / 2.79 pounds
1264.0 g / 12.4 N
10 mm Stal (~0.2) 0.49 kg / 1.08 pounds
492.0 g / 4.8 N
15 mm Stal (~0.2) 0.20 kg / 0.43 pounds
196.0 g / 1.9 N
20 mm Stal (~0.2) 0.08 kg / 0.19 pounds
84.0 g / 0.8 N
30 mm Stal (~0.2) 0.02 kg / 0.04 pounds
20.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
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 pounds
3807.0 g / 37.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.54 kg / 5.60 pounds
2538.0 g / 24.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.27 kg / 2.80 pounds
1269.0 g / 12.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
6.35 kg / 13.99 pounds
6345.0 g / 62.2 N

Table 4: Material efficiency (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 pounds
634.5 g / 6.2 N
1 mm
13%
1.59 kg / 3.50 pounds
1586.3 g / 15.6 N
2 mm
25%
3.17 kg / 6.99 pounds
3172.5 g / 31.1 N
3 mm
38%
4.76 kg / 10.49 pounds
4758.8 g / 46.7 N
5 mm
63%
7.93 kg / 17.49 pounds
7931.2 g / 77.8 N
10 mm
100%
12.69 kg / 27.98 pounds
12690.0 g / 124.5 N
11 mm
100%
12.69 kg / 27.98 pounds
12690.0 g / 124.5 N
12 mm
100%
12.69 kg / 27.98 pounds
12690.0 g / 124.5 N

Table 5: Working in heat (material behavior) - resistance threshold
MPL 50x20x5 / N38

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

Table 6: Magnet-Magnet interaction (attraction) - field collision
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 pounds
3 371 Gs
3.61 kg / 7.97 pounds
3614 g / 35.5 N
N/A
1 mm 23.06 kg / 50.84 pounds
3 868 Gs
3.46 kg / 7.63 pounds
3459 g / 33.9 N
20.75 kg / 45.75 pounds
~0 Gs
2 mm 21.89 kg / 48.27 pounds
3 769 Gs
3.28 kg / 7.24 pounds
3284 g / 32.2 N
19.71 kg / 43.44 pounds
~0 Gs
3 mm 20.65 kg / 45.53 pounds
3 661 Gs
3.10 kg / 6.83 pounds
3098 g / 30.4 N
18.59 kg / 40.98 pounds
~0 Gs
5 mm 18.07 kg / 39.83 pounds
3 424 Gs
2.71 kg / 5.97 pounds
2710 g / 26.6 N
16.26 kg / 35.84 pounds
~0 Gs
10 mm 12.00 kg / 26.46 pounds
2 790 Gs
1.80 kg / 3.97 pounds
1800 g / 17.7 N
10.80 kg / 23.81 pounds
~0 Gs
20 mm 4.67 kg / 10.30 pounds
1 741 Gs
0.70 kg / 1.54 pounds
701 g / 6.9 N
4.20 kg / 9.27 pounds
~0 Gs
50 mm 0.37 kg / 0.81 pounds
488 Gs
0.06 kg / 0.12 pounds
55 g / 0.5 N
0.33 kg / 0.73 pounds
~0 Gs
60 mm 0.18 kg / 0.40 pounds
343 Gs
0.03 kg / 0.06 pounds
27 g / 0.3 N
0.16 kg / 0.36 pounds
~0 Gs
70 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
80 mm 0.05 kg / 0.12 pounds
184 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
0.05 kg / 0.10 pounds
~0 Gs
90 mm 0.03 kg / 0.07 pounds
140 Gs
0.00 kg / 0.01 pounds
5 g / 0.0 N
0.03 kg / 0.06 pounds
~0 Gs
100 mm 0.02 kg / 0.04 pounds
108 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs

Table 7: Hazards (electronics) - warnings
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
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: Dynamics (kinetic energy) - warning
MPL 50x20x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.52 km/h
(5.98 m/s)
0.67 J
30 mm 23.53 km/h
(6.54 m/s)
0.80 J
50 mm 23.63 km/h
(6.56 m/s)
0.81 J
100 mm 23.65 km/h
(6.57 m/s)
0.81 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: Electrical data (Pc)
MPL 50x20x5 / N38

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

Table 11: Submerged application
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

1. Sliding resistance

*Caution: On a vertical wall, the magnet holds just ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 grade, the safety limit 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%

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: 020473-2026
Quick Unit Converter

Force (pull)


Magnetic Induction

Other products

Component MPL 50x20x5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 124.48 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 12.69 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 50x20x5 / 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. 12.69 kg), they are ideal as closers 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.
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. 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 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. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
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.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose power, even during nearly 10 years – the decrease in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets are distinguished by extremely resistant to demagnetization caused by external interference,
  • By covering with a shiny coating of silver, the element gains an elegant look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
  • Due to the option of accurate molding and adaptation to custom needs, neodymium magnets can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
  • Significant place in modern technologies – they are commonly used in hard drives, electric drive systems, medical devices, also industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We recommend cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The lifting capacity listed is a result of laboratory testing conducted under standard conditions:
  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • without the slightest air gap between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • at standard ambient temperature

Determinants of lifting force in real conditions

During everyday use, the real power is determined by many variables, ranked from crucial:
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Cast iron may attract less.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

H&S for magnets
Electronic devices

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Do not underestimate power

Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their force.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Danger to the youngest

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Maximum temperature

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Impact on smartphones

A powerful magnetic field negatively affects the functioning of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent touching magnets with bare hands and select coated magnets.

Risk of cracking

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

Finger safety

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Life threat

Individuals with a pacemaker must keep an absolute distance from magnets. The magnetic field can stop the functioning of the implant.

Safety First! More info about risks in the article: Magnet Safety Guide.