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MPL 30x20x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020141

GTIN/EAN: 5906301811473

5.00

length

30 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

45 g

Magnetization Direction

↑ axial

Load capacity

19.53 kg / 191.55 N

Magnetic Induction

371.57 mT / 3716 Gs

Coating

[NiCuNi] Nickel

16.11 with VAT / pcs + price for transport

13.10 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 30x20x10 / N38 - lamellar magnet

Specification / characteristics - MPL 30x20x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020141
GTIN/EAN 5906301811473
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 30 mm [±0,1 mm]
Width 20 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 45 g
Magnetization Direction ↑ axial
Load capacity ~ ? 19.53 kg / 191.55 N
Magnetic Induction ~ ? 371.57 mT / 3716 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x20x10 / 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 simulation of the product - report

Presented information constitute the outcome of a mathematical calculation. Values are based on algorithms for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Please consider these data as a reference point for designers.

Table 1: Static force (force vs gap) - interaction chart
MPL 30x20x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3715 Gs
371.5 mT
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
dangerous!
1 mm 3464 Gs
346.4 mT
16.98 kg / 37.44 pounds
16983.1 g / 166.6 N
dangerous!
2 mm 3197 Gs
319.7 mT
14.47 kg / 31.89 pounds
14466.6 g / 141.9 N
dangerous!
3 mm 2927 Gs
292.7 mT
12.12 kg / 26.73 pounds
12123.3 g / 118.9 N
dangerous!
5 mm 2408 Gs
240.8 mT
8.21 kg / 18.10 pounds
8207.8 g / 80.5 N
strong
10 mm 1411 Gs
141.1 mT
2.82 kg / 6.21 pounds
2815.6 g / 27.6 N
strong
15 mm 832 Gs
83.2 mT
0.98 kg / 2.16 pounds
979.7 g / 9.6 N
low risk
20 mm 512 Gs
51.2 mT
0.37 kg / 0.82 pounds
371.2 g / 3.6 N
low risk
30 mm 224 Gs
22.4 mT
0.07 kg / 0.16 pounds
70.7 g / 0.7 N
low risk
50 mm 65 Gs
6.5 mT
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
low risk

Table 2: Slippage force (vertical surface)
MPL 30x20x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.91 kg / 8.61 pounds
3906.0 g / 38.3 N
1 mm Stal (~0.2) 3.40 kg / 7.49 pounds
3396.0 g / 33.3 N
2 mm Stal (~0.2) 2.89 kg / 6.38 pounds
2894.0 g / 28.4 N
3 mm Stal (~0.2) 2.42 kg / 5.34 pounds
2424.0 g / 23.8 N
5 mm Stal (~0.2) 1.64 kg / 3.62 pounds
1642.0 g / 16.1 N
10 mm Stal (~0.2) 0.56 kg / 1.24 pounds
564.0 g / 5.5 N
15 mm Stal (~0.2) 0.20 kg / 0.43 pounds
196.0 g / 1.9 N
20 mm Stal (~0.2) 0.07 kg / 0.16 pounds
74.0 g / 0.7 N
30 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - vertical pull
MPL 30x20x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.86 kg / 12.92 pounds
5859.0 g / 57.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.91 kg / 8.61 pounds
3906.0 g / 38.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.95 kg / 4.31 pounds
1953.0 g / 19.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
9.77 kg / 21.53 pounds
9765.0 g / 95.8 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 30x20x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.98 kg / 2.15 pounds
976.5 g / 9.6 N
1 mm
13%
2.44 kg / 5.38 pounds
2441.3 g / 23.9 N
2 mm
25%
4.88 kg / 10.76 pounds
4882.5 g / 47.9 N
3 mm
38%
7.32 kg / 16.15 pounds
7323.8 g / 71.8 N
5 mm
63%
12.21 kg / 26.91 pounds
12206.3 g / 119.7 N
10 mm
100%
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
11 mm
100%
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
12 mm
100%
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N

Table 5: Working in heat (material behavior) - power drop
MPL 30x20x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
OK
40 °C -2.2% 19.10 kg / 42.11 pounds
19100.3 g / 187.4 N
OK
60 °C -4.4% 18.67 kg / 41.16 pounds
18670.7 g / 183.2 N
80 °C -6.6% 18.24 kg / 40.21 pounds
18241.0 g / 178.9 N
100 °C -28.8% 13.91 kg / 30.66 pounds
13905.4 g / 136.4 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 30x20x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 51.05 kg / 112.54 pounds
5 124 Gs
7.66 kg / 16.88 pounds
7657 g / 75.1 N
N/A
1 mm 47.76 kg / 105.28 pounds
7 186 Gs
7.16 kg / 15.79 pounds
7163 g / 70.3 N
42.98 kg / 94.76 pounds
~0 Gs
2 mm 44.39 kg / 97.86 pounds
6 928 Gs
6.66 kg / 14.68 pounds
6658 g / 65.3 N
39.95 kg / 88.08 pounds
~0 Gs
3 mm 41.06 kg / 90.52 pounds
6 663 Gs
6.16 kg / 13.58 pounds
6159 g / 60.4 N
36.95 kg / 81.47 pounds
~0 Gs
5 mm 34.68 kg / 76.45 pounds
6 124 Gs
5.20 kg / 11.47 pounds
5202 g / 51.0 N
31.21 kg / 68.81 pounds
~0 Gs
10 mm 21.45 kg / 47.30 pounds
4 817 Gs
3.22 kg / 7.09 pounds
3218 g / 31.6 N
19.31 kg / 42.57 pounds
~0 Gs
20 mm 7.36 kg / 16.22 pounds
2 821 Gs
1.10 kg / 2.43 pounds
1104 g / 10.8 N
6.62 kg / 14.60 pounds
~0 Gs
50 mm 0.40 kg / 0.89 pounds
662 Gs
0.06 kg / 0.13 pounds
61 g / 0.6 N
0.36 kg / 0.80 pounds
~0 Gs
60 mm 0.18 kg / 0.41 pounds
447 Gs
0.03 kg / 0.06 pounds
28 g / 0.3 N
0.17 kg / 0.37 pounds
~0 Gs
70 mm 0.09 kg / 0.20 pounds
314 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
0.08 kg / 0.18 pounds
~0 Gs
80 mm 0.05 kg / 0.11 pounds
228 Gs
0.01 kg / 0.02 pounds
7 g / 0.1 N
0.04 kg / 0.10 pounds
~0 Gs
90 mm 0.03 kg / 0.06 pounds
170 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.02 kg / 0.05 pounds
~0 Gs
100 mm 0.02 kg / 0.03 pounds
130 Gs
0.00 kg / 0.01 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 30x20x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.0 cm
Hearing aid 10 Gs (1.0 mT) 10.0 cm
Timepiece 20 Gs (2.0 mT) 8.0 cm
Mobile device 40 Gs (4.0 mT) 6.5 cm
Remote 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x20x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.82 km/h
(6.34 m/s)
0.90 J
30 mm 36.47 km/h
(10.13 m/s)
2.31 J
50 mm 46.99 km/h
(13.05 m/s)
3.83 J
100 mm 66.44 km/h
(18.46 m/s)
7.66 J

Table 9: Coating parameters (durability)
MPL 30x20x10 / 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 30x20x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 22 801 Mx 228.0 µWb
Pc Coefficient 0.46 Low (Flat)

Table 11: Submerged application
MPL 30x20x10 / N38

Environment Effective steel pull Effect
Air (land) 19.53 kg Standard
Water (riverbed) 22.36 kg
(+2.83 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. Vertical hold

*Note: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.

2. Plate thickness effect

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

3. Temperature resistance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.46

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: 020141-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other offers

Component MPL 30x20x10 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 191.55 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block 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 19.53 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 30x20x10 / 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. 19.53 kg), they are ideal as closers 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 30x20x10 / 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. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (30x20 mm), which is ideal for flat mounting. 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: 30 mm (length), 20 mm (width), and 10 mm (thickness). It is a magnetic block with dimensions 30x20x10 mm and a self-weight of 45 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Pros

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They retain attractive force for around ten years – the drop is just ~1% (based on simulations),
  • They retain their magnetic properties even under close interference source,
  • The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnets are distinguished by exceptionally strong magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of custom shaping and adjusting to precise needs,
  • Significant place in high-tech industry – they find application in data components, electromotive mechanisms, medical equipment, as well as other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in miniature devices

Disadvantages

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum magnetic pulling forcewhat contributes to it?

The load parameter shown represents the limit force, recorded under laboratory conditions, specifically:
  • with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • whose thickness reaches at least 10 mm
  • with a surface cleaned and smooth
  • under conditions of no distance (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

Please note that the application force will differ influenced by elements below, in order of importance:
  • Distance (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Safety rules for work with neodymium magnets
Heat warning

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

Life threat

Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Immense force

Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Magnet fragility

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. We recommend safety glasses.

Crushing force

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Mechanical processing

Dust produced during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Avoid contact if allergic

Studies show that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent touching magnets with bare hands and select coated magnets.

Keep away from computers

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, timepieces).

GPS and phone interference

Remember: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your mobile, tablet, and GPS.

Keep away from children

Product intended for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of children and animals.

Warning! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98