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

MPL 30x10x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020138

GTIN/EAN: 5906301811442

5.00
Load capacity 8.89 kg / 87.23 N Magnetic Induction 329.52 mT / 3295 Gs
length
30 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.25 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

3.46net / pcs

4.26 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity
Net
Gross
price from 1 pcs
3.46 zł
4.26 zł
price from 200 pcs
3.25 zł
4.00 zł
price from 750 pcs
3.04 zł
3.75 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 data of the product - MPL 30x10x5 / N38 - lamellar magnet

Specification / characteristics - MPL 30x10x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020138
GTIN/EAN 5906301811442
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 10 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 11.25 g
Magnetization Direction ↑ axial
Load capacity ~ ? 8.89 kg / 87.23 N
Magnetic Induction ~ ? 329.52 mT / 3295 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x10x5 / 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

Physical analysis of the product - technical parameters

Presented information are the result of a mathematical calculation. Results are based on algorithms for the material Nd2Fe14B. Real-world conditions may differ. Treat these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MPL 30x10x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3294 Gs
329.4 mT
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
warning
1 mm 2866 Gs
286.6 mT
6.73 kg / 14.84 pounds
6731.1 g / 66.0 N
warning
2 mm 2424 Gs
242.4 mT
4.82 kg / 10.62 pounds
4816.4 g / 47.2 N
warning
3 mm 2022 Gs
202.2 mT
3.35 kg / 7.38 pounds
3349.6 g / 32.9 N
warning
5 mm 1397 Gs
139.7 mT
1.60 kg / 3.53 pounds
1600.3 g / 15.7 N
safe
10 mm 615 Gs
61.5 mT
0.31 kg / 0.68 pounds
309.8 g / 3.0 N
safe
15 mm 314 Gs
31.4 mT
0.08 kg / 0.18 pounds
80.6 g / 0.8 N
safe
20 mm 177 Gs
17.7 mT
0.03 kg / 0.06 pounds
25.8 g / 0.3 N
safe
30 mm 70 Gs
7.0 mT
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
safe
50 mm 19 Gs
1.9 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
safe

Table 2: Shear force (vertical surface)
MPL 30x10x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
1 mm Stal (~0.2) 1.35 kg / 2.97 pounds
1346.0 g / 13.2 N
2 mm Stal (~0.2) 0.96 kg / 2.13 pounds
964.0 g / 9.5 N
3 mm Stal (~0.2) 0.67 kg / 1.48 pounds
670.0 g / 6.6 N
5 mm Stal (~0.2) 0.32 kg / 0.71 pounds
320.0 g / 3.1 N
10 mm Stal (~0.2) 0.06 kg / 0.14 pounds
62.0 g / 0.6 N
15 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
20 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 30x10x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.67 kg / 5.88 pounds
2667.0 g / 26.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x10x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
1 mm
25%
2.22 kg / 4.90 pounds
2222.5 g / 21.8 N
2 mm
50%
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
3 mm
75%
6.67 kg / 14.70 pounds
6667.5 g / 65.4 N
5 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
10 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
11 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
12 mm
100%
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N

Table 5: Thermal resistance (material behavior) - power drop
MPL 30x10x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
OK
40 °C -2.2% 8.69 kg / 19.17 pounds
8694.4 g / 85.3 N
OK
60 °C -4.4% 8.50 kg / 18.74 pounds
8498.8 g / 83.4 N
80 °C -6.6% 8.30 kg / 18.31 pounds
8303.3 g / 81.5 N
100 °C -28.8% 6.33 kg / 13.95 pounds
6329.7 g / 62.1 N

Table 6: Two magnets (repulsion) - field range
MPL 30x10x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 20.06 kg / 44.23 pounds
4 689 Gs
3.01 kg / 6.63 pounds
3010 g / 29.5 N
N/A
1 mm 17.63 kg / 38.86 pounds
6 174 Gs
2.64 kg / 5.83 pounds
2644 g / 25.9 N
15.86 kg / 34.98 pounds
~0 Gs
2 mm 15.19 kg / 33.49 pounds
5 732 Gs
2.28 kg / 5.02 pounds
2279 g / 22.4 N
13.67 kg / 30.14 pounds
~0 Gs
3 mm 12.92 kg / 28.47 pounds
5 285 Gs
1.94 kg / 4.27 pounds
1937 g / 19.0 N
11.62 kg / 25.63 pounds
~0 Gs
5 mm 9.08 kg / 20.03 pounds
4 432 Gs
1.36 kg / 3.00 pounds
1363 g / 13.4 N
8.18 kg / 18.02 pounds
~0 Gs
10 mm 3.61 kg / 7.96 pounds
2 795 Gs
0.54 kg / 1.19 pounds
542 g / 5.3 N
3.25 kg / 7.17 pounds
~0 Gs
20 mm 0.70 kg / 1.54 pounds
1 230 Gs
0.10 kg / 0.23 pounds
105 g / 1.0 N
0.63 kg / 1.39 pounds
~0 Gs
50 mm 0.02 kg / 0.05 pounds
217 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.04 pounds
~0 Gs
60 mm 0.01 kg / 0.02 pounds
141 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
96 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
68 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
50 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
38 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 30x10x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Mechanical watch 20 Gs (2.0 mT) 5.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.0 cm
Car key 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x10x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.33 km/h
(6.76 m/s)
0.26 J
30 mm 24.87 km/h
(6.91 m/s)
0.27 J
50 mm 24.88 km/h
(6.91 m/s)
0.27 J
100 mm 24.88 km/h
(6.91 m/s)
0.27 J

Table 9: Surface protection spec
MPL 30x10x5 / 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 30x10x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 9 370 Mx 93.7 µWb
Pc Coefficient 0.35 Low (Flat)

Table 11: Submerged application
MPL 30x10x5 / N38

Environment Effective steel pull Effect
Air (land) 8.89 kg Standard
Water (riverbed) 10.18 kg
(+1.29 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 retains just approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) severely reduces 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) = 0.35

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

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%

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: 020138-2026
Measurement Calculator

Pulling force


Field Strength

See more deals

Component MPL 30x10x5 / N38 features a low profile and professional pulling force, making it an ideal solution for building separators and machines. As a block magnet with high power (approx. 8.89 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.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 30x10x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 30x10x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. 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 30x10x5 / 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 clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 30x10x5 / 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.
The presented product is a neodymium magnet with precisely defined parameters: 30 mm (length), 10 mm (width), and 5 mm (thickness). It is a magnetic block with dimensions 30x10x5 mm and a self-weight of 11.25 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • Neodymium magnets are distinguished by highly resistant to magnetic field loss caused by external interference,
  • In other words, due to the reflective finish of gold, the element becomes visually attractive,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in forming and the capacity to adapt to unusual requirements,
  • Significant place in future technologies – they are commonly used in mass storage devices, brushless drives, advanced medical instruments, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited possibility of making threads in the magnet and complex shapes - recommended is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
  • With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The force parameter is a measurement result executed under specific, ideal conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • with a thickness no less than 10 mm
  • with an ground contact surface
  • with direct contact (without paint)
  • under perpendicular force direction (90-degree angle)
  • at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Real force is affected by working environment parameters, including (from most important):
  • Distance (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity 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).
  • Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets
Compass and GPS

A powerful magnetic field negatively affects the functioning of magnetometers in phones and navigation systems. Keep magnets near a device to prevent breaking the sensors.

Skin irritation risks

Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for coated magnets.

Health Danger

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Mechanical processing

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

Shattering risk

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Eye protection is mandatory.

Electronic devices

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Operating temperature

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Physical harm

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

Do not give to children

Strictly store magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.

Powerful field

Use magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?