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MPL 15x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020123

GTIN/EAN: 5906301811299

5.00
Load capacity 3.20 kg / 31.38 N Magnetic Induction 468.69 mT / 4687 Gs
length
15 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
2.81 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product specifications »

1.390 zł with VAT / pcs + price for transport

1.130 zł net + 23% VAT / pcs

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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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Technical of the product - MPL 15x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 15x5x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020123
GTIN/EAN 5906301811299
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 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 2.81 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.20 kg / 31.38 N
Magnetic Induction ~ ? 468.69 mT / 4687 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x5x5 / 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 assembly - data

The following data represent the outcome of a engineering calculation. Results are based on models for the material Nd2Fe14B. Operational parameters may differ from theoretical values. Please consider these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MPL 15x5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4682 Gs
468.2 mT
 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
 warning
1 mm 3410 Gs
341.0 mT
 1.70 kg / 3.74 LBS
1697.3 g / 16.7 N
 weak grip
2 mm 2394 Gs
239.4 mT
 0.84 kg / 1.84 LBS
836.5 g / 8.2 N
 weak grip
3 mm 1701 Gs
170.1 mT
 0.42 kg / 0.93 LBS
422.6 g / 4.1 N
 weak grip
5 mm 928 Gs
92.8 mT
 0.13 kg / 0.28 LBS
125.8 g / 1.2 N
 weak grip
10 mm 286 Gs
28.6 mT
 0.01 kg / 0.03 LBS
11.9 g / 0.1 N
 weak grip
15 mm 119 Gs
11.9 mT
 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
 weak grip
20 mm 59 Gs
5.9 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 weak grip
30 mm 21 Gs
2.1 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 weak grip
50 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Pulling power decreases significantly with every subsequent millimeter of gap. Remember that every additional insulation layer (e.g., contamination, varnish, rust) strongly reduces the pull force. Neodymiums operate strongest in perfect adhesion; air break kills the power. See how rapidly the pull force fall, when the magnet does not adhere flatly to the steel surface. When calculating the assembly, discard redundant distances.

Table 2: Slippage capacity (vertical surface)
MPL 15x5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.64 kg / 1.41 LBS
640.0 g / 6.3 N
1 mm Stal (~0.2) 0.34 kg / 0.75 LBS
340.0 g / 3.3 N
2 mm Stal (~0.2) 0.17 kg / 0.37 LBS
168.0 g / 1.6 N
3 mm Stal (~0.2) 0.08 kg / 0.19 LBS
84.0 g / 0.8 N
5 mm Stal (~0.2) 0.03 kg / 0.06 LBS
26.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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 table below presents the estimated shear load sufficient to start the slippage of the magnet downwards against a vertical steel wall (considering typical friction). This value is a function of the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 15x5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.96 kg / 2.12 LBS
960.0 g / 9.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.64 kg / 1.41 LBS
640.0 g / 6.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.32 kg / 0.71 LBS
320.0 g / 3.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.60 kg / 3.53 LBS
1600.0 g / 15.7 N
When placing a element on a vertical plane (e.g., a fridge), it will maintain just about 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient mean that magnets slide down faster than they pop off the substrate. Designing a vertical fastening? Remember that the shear force is much weaker than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a noticeably lighter cargo. Using a rubber layer can drastically improve the result.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 15x5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.32 kg / 0.71 LBS
320.0 g / 3.1 N
1 mm
25%
 0.80 kg / 1.76 LBS
800.0 g / 7.8 N
2 mm
50%
 1.60 kg / 3.53 LBS
1600.0 g / 15.7 N
3 mm
75%
 2.40 kg / 5.29 LBS
2400.0 g / 23.5 N
5 mm
100%
 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
10 mm
100%
 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
11 mm
100%
 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
12 mm
100%
 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
A too thin steel cannot conduct the entire magnetic field, which wastes potential of the holder. If you mount a strong magnet to a too thin substrate, the magnetism will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's power, you need a suitably thick element of steel. The material oversaturation means that on thin elements (e.g., appliance housings), the magnet holds weaker. We advise picking the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MPL 15x5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.20 kg / 7.05 LBS
3200.0 g / 31.4 N
 OK
40 °C -2.2% 3.13 kg / 6.90 LBS
3129.6 g / 30.7 N
 OK
60 °C -4.4% 3.06 kg / 6.74 LBS
3059.2 g / 30.0 N
80 °C -6.6% 2.99 kg / 6.59 LBS
2988.8 g / 29.3 N
100 °C -28.8% 2.28 kg / 5.02 LBS
2278.4 g / 22.4 N
Ordinary NdFeB products lose power past the thermal threshold. Watch out for overheating – high temperature can irreversibly demagnetize this product. With increasing heat, the neodymium's capacity temporarily lowers. Refrain from using this magnet close to heaters exceeding its working range. Too high temperature will lead to destruction of magnetic properties.
*Engineering note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than taller cylinders. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MPL 15x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 10.14 kg / 22.35 LBS
5 608 Gs
1.52 kg / 3.35 LBS
1520 g / 14.9 N
 N/A
1 mm 7.53 kg / 16.60 LBS
8 071 Gs
1.13 kg / 2.49 LBS
1129 g / 11.1 N
 6.78 kg / 14.94 LBS
~0 Gs
2 mm 5.38 kg / 11.85 LBS
6 820 Gs
0.81 kg / 1.78 LBS
806 g / 7.9 N
 4.84 kg / 10.67 LBS
~0 Gs
3 mm 3.78 kg / 8.33 LBS
5 716 Gs
0.57 kg / 1.25 LBS
567 g / 5.6 N
 3.40 kg / 7.49 LBS
~0 Gs
5 mm 1.87 kg / 4.13 LBS
4 024 Gs
0.28 kg / 0.62 LBS
281 g / 2.8 N
 1.68 kg / 3.71 LBS
~0 Gs
10 mm 0.40 kg / 0.88 LBS
1 857 Gs
0.06 kg / 0.13 LBS
60 g / 0.6 N
 0.36 kg / 0.79 LBS
~0 Gs
20 mm 0.04 kg / 0.08 LBS
572 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
 0.03 kg / 0.08 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
67 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
41 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
27 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
19 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
14 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
10 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 wider radius than a neodymium and metal combination. Such a system of two magnets produces a massive flux and a larger range of operation. Designing a solid fastener? Use a pair of magnets instead of one magnet and a striker plate. Remember that when bringing together two magnets, the impact force is massive. The levitation is slightly lower than the attraction, but still large.
*Field value between like poles is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
* Figures show shear force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - warnings
MPL 15x5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Powerful magnet radiation is a large risk to electronics as well as pacemakers. These NdFeB products produce a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MPL 15x5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.14 km/h
(5.87 m/s)
 0.05 J
30 mm 21.21 km/h
(5.89 m/s)
 0.05 J
50 mm 21.21 km/h
(5.89 m/s)
 0.05 J
100 mm 21.22 km/h
(5.89 m/s)
 0.05 J
Magnetic elements are delicate – a violent impact against metal causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Impact energy can cause material chips or dangerous crushing to skin. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Corrosion resistance
MPL 15x5x5 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MPL 15x5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 366 Mx 33.7 µWb
Pc Coefficient 0.60 Low (Flat)
Total magnetic flux passing through the pole surface. Key data in coil applications as well as sensors. Pc value defines the working geometry.

Table 11: Underwater work (magnet fishing)
MPL 15x5x5 / N38

Environment Effective steel pull Effect
Air (land) 3.20 kg Standard
Water (riverbed) 3.66 kg
(+0.46 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!
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds only ~20% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.60

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

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%

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: 020123-2026
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Component MPL 15x5x5 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 3.20 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 shifting 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 3.20 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 15x5x5 / 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. 3.20 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.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. 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.
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 (15x5 mm), which is ideal for flat mounting. 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), 5 mm (width), and 5 mm (thickness). It is a magnetic block with dimensions 15x5x5 mm and a self-weight of 2.81 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of Nd2Fe14B magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over more than ten years their performance decreases symbolically – ~1% (in testing),
  • Magnets effectively resist against demagnetization caused by ambient magnetic noise,
  • A magnet with a shiny gold surface looks better,
  • Magnetic induction on the surface of the magnet remains very high,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of custom forming and modifying to concrete requirements,
  • Versatile presence in future technologies – they are commonly used in hard drives, electric drive systems, medical devices, and modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: application proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures 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 magnets in rubber or plastics, which secure oxidation and corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex forms.
  • Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Additionally, small components of these products can be problematic in diagnostics medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

The force parameter is a theoretical maximum value executed under standard conditions:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • with a thickness minimum 10 mm
  • with a surface cleaned and smooth
  • without the slightest insulating layer between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • at room temperature

Determinants of practical lifting force of a magnet

During everyday use, the actual lifting capacity is determined by a number of factors, presented from the most important:
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Material brittleness

NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them cracking into small pieces.

Life threat

Warning for patients: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Conscious usage

Handle magnets consciously. Their powerful strength can surprise even professionals. Be vigilant and respect their power.

Adults only

These products are not toys. Swallowing several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.

Physical harm

Danger of trauma: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Metal Allergy

A percentage of the population have a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching can result in an allergic reaction. We recommend use safety gloves.

Electronic devices

Equipment safety: Strong magnets can damage data carriers and sensitive devices (heart implants, medical aids, timepieces).

Operating temperature

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Threat to navigation

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Mechanical processing

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Warning! Need more info? Read our article: Are neodymium magnets dangerous?