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MPL 15x3x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020122

GTIN/EAN: 5906301811282

5.00
Load capacity 1.90 kg / 18.68 N Magnetic Induction 543.23 mT / 5432 Gs
length
15 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
2.03 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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price from 1100 pcs
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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.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Physical properties - MPL 15x3x6 / N38 - lamellar magnet

Specification / characteristics - MPL 15x3x6 / N38 - lamellar magnet

properties
properties values
Cat. no. 020122
GTIN/EAN 5906301811282
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 15 mm [±0,1 mm]
Width 3 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 2.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.90 kg / 18.68 N
Magnetic Induction ~ ? 543.23 mT / 5432 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x3x6 / 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 analysis of the assembly - technical parameters

These values represent the direct effect of a physical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Use these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MPL 15x3x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5423 Gs
542.3 mT
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
low risk
1 mm 3221 Gs
322.1 mT
0.67 kg / 1.48 lbs
670.2 g / 6.6 N
low risk
2 mm 1942 Gs
194.2 mT
0.24 kg / 0.54 lbs
243.7 g / 2.4 N
low risk
3 mm 1274 Gs
127.4 mT
0.10 kg / 0.23 lbs
104.9 g / 1.0 N
low risk
5 mm 652 Gs
65.2 mT
0.03 kg / 0.06 lbs
27.5 g / 0.3 N
low risk
10 mm 195 Gs
19.5 mT
0.00 kg / 0.01 lbs
2.5 g / 0.0 N
low risk
15 mm 81 Gs
8.1 mT
0.00 kg / 0.00 lbs
0.4 g / 0.0 N
low risk
20 mm 41 Gs
4.1 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk
30 mm 14 Gs
1.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
50 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Shear capacity (vertical surface)
MPL 15x3x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.38 kg / 0.84 lbs
380.0 g / 3.7 N
1 mm Stal (~0.2) 0.13 kg / 0.30 lbs
134.0 g / 1.3 N
2 mm Stal (~0.2) 0.05 kg / 0.11 lbs
48.0 g / 0.5 N
3 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
5 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
MPL 15x3x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.57 kg / 1.26 lbs
570.0 g / 5.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.38 kg / 0.84 lbs
380.0 g / 3.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.95 kg / 2.09 lbs
950.0 g / 9.3 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 15x3x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
1 mm
25%
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
2 mm
50%
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
3 mm
75%
1.42 kg / 3.14 lbs
1425.0 g / 14.0 N
5 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
10 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
11 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
12 mm
100%
1.90 kg / 4.19 lbs
1900.0 g / 18.6 N

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 15x3x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.90 kg / 4.19 lbs
1900.0 g / 18.6 N
OK
40 °C -2.2% 1.86 kg / 4.10 lbs
1858.2 g / 18.2 N
OK
60 °C -4.4% 1.82 kg / 4.00 lbs
1816.4 g / 17.8 N
OK
80 °C -6.6% 1.77 kg / 3.91 lbs
1774.6 g / 17.4 N
100 °C -28.8% 1.35 kg / 2.98 lbs
1352.8 g / 13.3 N

Table 6: Two magnets (repulsion) - field range
MPL 15x3x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 8.16 kg / 17.99 lbs
5 914 Gs
1.22 kg / 2.70 lbs
1224 g / 12.0 N
N/A
1 mm 4.96 kg / 10.94 lbs
8 460 Gs
0.74 kg / 1.64 lbs
745 g / 7.3 N
4.47 kg / 9.85 lbs
~0 Gs
2 mm 2.88 kg / 6.34 lbs
6 441 Gs
0.43 kg / 0.95 lbs
432 g / 4.2 N
2.59 kg / 5.71 lbs
~0 Gs
3 mm 1.70 kg / 3.75 lbs
4 950 Gs
0.25 kg / 0.56 lbs
255 g / 2.5 N
1.53 kg / 3.37 lbs
~0 Gs
5 mm 0.67 kg / 1.48 lbs
3 116 Gs
0.10 kg / 0.22 lbs
101 g / 1.0 N
0.61 kg / 1.34 lbs
~0 Gs
10 mm 0.12 kg / 0.26 lbs
1 304 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.23 lbs
~0 Gs
20 mm 0.01 kg / 0.02 lbs
391 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
46 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
29 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
19 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
13 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
9 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
7 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 15x3x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MPL 15x3x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 15.60 km/h
(4.33 m/s)
0.02 J
30 mm 15.63 km/h
(4.34 m/s)
0.02 J
50 mm 15.63 km/h
(4.34 m/s)
0.02 J
100 mm 15.63 km/h
(4.34 m/s)
0.02 J

Table 9: Surface protection spec
MPL 15x3x6 / 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 15x3x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 390 Mx 23.9 µWb
Pc Coefficient 0.79 High (Stable)

Table 11: Submerged application
MPL 15x3x6 / N38

Environment Effective steel pull Effect
Air (land) 1.90 kg Standard
Water (riverbed) 2.18 kg
(+0.28 kg buoyancy gain)
+14.5%
Rust risk: 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 surface, the magnet holds just approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Temperature resistance

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.79

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 specification and ecology

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%

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: 020122-2026
Measurement Calculator

Pulling force


Magnetic Induction

Other offers

Component MPL 15x3x6 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 1.90 kg), this product is available immediately 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 1.90 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 15x3x6 / 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. 1.90 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 15x3x6 / N38, we recommend utilizing 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 roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 15x3x6 / N38 model is magnetized axially (dimension 6 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: 15 mm (length), 3 mm (width), and 6 mm (thickness). It is a magnetic block with dimensions 15x3x6 mm and a self-weight of 2.03 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.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • They are noted for resistance to demagnetization induced by external field influence,
  • A magnet with a shiny gold surface has an effective appearance,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
  • Thanks to flexibility in shaping and the ability to modify to specific needs,
  • Wide application in modern technologies – they are commonly used in computer drives, drive modules, diagnostic systems, as well as industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages

Cons of neodymium magnets: application proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using cover - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?

Information about lifting capacity was defined for ideal contact conditions, assuming:
  • on a base made of structural steel, effectively closing the magnetic field
  • with a thickness no less than 10 mm
  • with a plane cleaned and smooth
  • without any air gap between the magnet and steel
  • under axial force vector (90-degree angle)
  • at temperature room level

Magnet lifting force in use – key factors

In practice, the actual lifting capacity results from many variables, listed from most significant:
  • Air gap (betwixt the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be wasted into the air.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface condition – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. 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 the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Hand protection

Danger of trauma: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Use thick gloves.

Magnets are brittle

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Operating temperature

Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Handling guide

Exercise caution. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can react.

Compass and GPS

Note: neodymium magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.

Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop handling magnets and wear gloves.

Pacemakers

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

Product not for children

Strictly store magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are very dangerous.

Dust explosion hazard

Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Threat to electronics

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

Attention! Want to know more? Check our post: Why are neodymium magnets dangerous?