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MPL 15x3x6 / N38 - lamellar magnet

lamellar magnet

Catalog no 020122

GTIN/EAN: 5906301811282

5.00

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

check technical data »

0.726 ZŁ with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Detailed specification - 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
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 analysis of the magnet - technical parameters

The following data constitute the result of a physical calculation. Results are based on models for the material Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Please consider these calculations as a supplementary guide during assembly planning.

Table 1: Static force (force vs distance) - 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
 safe
1 mm 3221 Gs
322.1 mT
 0.67 kg / 1.48 lbs
670.2 g / 6.6 N
 safe
2 mm 1942 Gs
194.2 mT
 0.24 kg / 0.54 lbs
243.7 g / 2.4 N
 safe
3 mm 1274 Gs
127.4 mT
 0.10 kg / 0.23 lbs
104.9 g / 1.0 N
 safe
5 mm 652 Gs
65.2 mT
 0.03 kg / 0.06 lbs
27.5 g / 0.3 N
 safe
10 mm 195 Gs
19.5 mT
 0.00 kg / 0.01 lbs
2.5 g / 0.0 N
 safe
15 mm 81 Gs
8.1 mT
 0.00 kg / 0.00 lbs
0.4 g / 0.0 N
 safe
20 mm 41 Gs
4.1 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 safe
30 mm 14 Gs
1.4 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Pulling power decreases significantly per each millimeter of distance. Remember that every additional insulation layer (e.g., contamination, paint, rust) significantly reduces the pull force. Magnets operate optimally at the point of direct contact; gap nullifies the power. Analyze how rapidly the pull force drop, when the magnet does not touch flatly to the metal substrate. When planning the assembly, discard additional spacers.

Table 2: Shear force (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
The following data presents the theoretical force needed to initiate the sliding of the magnet down on a upright metal surface (assuming standard friction coefficient). This value varies with the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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
When hanging a magnet on a upright wall (e.g., a car body), it will maintain only about 1/5 of nominal attraction strength. Gravitational force as well as a weak degree of grip cause that products move down easier than they pull off. Planning a hanger? Note that the sliding force is significantly lower than the maximum static pull force. On a smooth steel, the magnet will slide down under a significantly smaller load. Application of an anti-slip coating can significantly improve the result.

Table 4: Material efficiency (saturation) - 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
A too thin steel cannot take in the full magnetic flux, which wastes potential of the magnet. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the holding will be smaller. To squeeze 100% of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the product works worse. We advise picking the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - resistance threshold
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
Classic neodymiums change their properties parameters above the temperature limit. Avoid high temperatures – heat can irreversibly destroy this product. With increasing heat, the neodymium's force temporarily lowers. Do not use this magnet near heat sources exceeding its working range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.
*Important note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than long magnets. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MPL 15x3x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (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
Two magnets attract each other from a much further distance than a magnet and sheet setup. The setup of magnet-to-magnet generates a stronger field and a further horizon of action. Want to build a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the collision energy is massive. The repulsion force is marginally weaker than the connection force, but still large.
*Field value between like poles reaches ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Figures show friction force of two same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
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
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 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
Extremely neodym field poses a large risk to IT equipment as well as pacemakers. These neodymiums produce a flux that disrupts operation of digital equipment. Be aware: the unseen radiation penetrates the body and glass. Special caution must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, speakers, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

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

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 30.88 km/h
(8.58 m/s)
 0.07 J
30 mm 53.44 km/h
(14.84 m/s)
 0.22 J
50 mm 68.99 km/h
(19.16 m/s)
 0.37 J
100 mm 97.57 km/h
(27.10 m/s)
 0.75 J
Magnetic elements are very brittle – a collision with steel can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Use safety goggles when playing with large magnets.

Table 9: Coating parameters (durability)
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)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MPL 15x3x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 390 Mx 23.9 µWb
Pc Coefficient 0.79 High (Stable)
Flux value emitted by the pole surface. Key data when building generators and motors. Pc value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.
1. Vertical hold

*Caution: On a vertical surface, the magnet retains merely ~20% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. computer case) severely 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) = 0.79

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.

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%
Environmental data
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
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Component MPL 15x3x6 / N38 features a flat shape and professional pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 18.68 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating protects 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 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.
They constitute a key element in the production of wind generators and material handling systems. 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, 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 (15x3 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 15x3x6 mm, which, at a weight of 2.03 g, makes it an element with high energy density. The key parameter here is the holding force amounting to approximately 1.90 kg (force ~18.68 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages as well as disadvantages of neodymium magnets.

Pros

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • They have constant strength, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • Thanks to the metallic finish, the coating of nickel, gold, or silver-plated gives an visually attractive appearance,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Due to the ability of flexible shaping and customization to individualized projects, neodymium magnets can be manufactured in a variety of shapes and sizes, which increases their versatility,
  • Key role in high-tech industry – they are utilized in computer drives, electromotive mechanisms, advanced medical instruments, and industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Cons of neodymium magnets and proposals for their use:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using cover - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum magnetic pulling force – what affects it?

The load parameter shown concerns the peak performance, measured under laboratory conditions, meaning:
  • using a base made of mild steel, serving as a circuit closing element
  • whose thickness reaches at least 10 mm
  • with a plane free of scratches
  • with direct contact (without impurities)
  • under vertical force direction (90-degree angle)
  • at ambient temperature room level

Determinants of practical lifting force of a magnet

In practice, the real power depends on several key aspects, ranked from crucial:
  • Distance – existence of any layer (paint, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Precision electronics

Navigation devices and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Swallowing risk

NdFeB magnets are not intended for children. Accidental ingestion of multiple magnets may result in them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Magnets are brittle

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Maximum temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Allergic reactions

Studies show that nickel (the usual finish) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for versions in plastic housing.

Finger safety

Large magnets can break fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.

Safe operation

Exercise caution. Neodymium magnets act from a distance and connect with huge force, often quicker than you can react.

Life threat

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Fire risk

Dust generated during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.

Protect data

Device Safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Attention! Need more info? Read our article: Why are neodymium magnets dangerous?