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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

How we measure these parameters — certificates and measurements

1.130net / pcs

1.390 zł with VAT (23% VAT) / pcs

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Gross
price from 1 pcs
1.130 zł
1.390 zł
price from 550 pcs
1.062 zł
1.307 zł
price from 2250 pcs
0.994 zł
1.223 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.

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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.

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Detailed specification - 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
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 product - technical parameters

These information constitute the outcome of a physical simulation. Values rely on models for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a preliminary roadmap for designers.

Table 1: Static force (force 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
strong
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

Table 2: Vertical 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

Table 3: Vertical assembly (shearing) - 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

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

Table 5: Working in heat (stability) - resistance threshold
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

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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

Table 7: Safety (HSE) (implants) - precautionary measures
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
Car key 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

Table 8: Collisions (kinetic energy) - warning
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

Table 9: Coating parameters (durability)
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)

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

Parameter Value SI Unit / Description
Magnetic Flux 3 366 Mx 33.7 µWb
Pc Coefficient 0.60 Low (Flat)

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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

1. Vertical hold

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

2. Steel saturation

*Thin metal sheet (e.g. computer case) drastically limits the holding force.

3. Heat tolerance

*For N38 grade, 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

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%

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: 020123-2026
Quick Unit Converter

Force (pull)


Magnetic Induction

View also offers

Model MPL 15x5x5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 3.20 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, 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. To separate the MPL 15x5x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. 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 magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 15x5x5 / N38, we recommend utilizing 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).
Standardly, the MPL 15x5x5 / 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.
This model is characterized by dimensions 15x5x5 mm, which, at a weight of 2.81 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 3.20 kg (force ~31.38 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of rare earth magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • Thanks to flexibility in designing and the ability to customize to client solutions,
  • Wide application in modern industrial fields – they find application in magnetic memories, electric drive systems, advanced medical instruments, as well as industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in producing nuts and complex forms in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnetwhat it depends on?

The declared magnet strength refers to the maximum value, measured under optimal environment, specifically:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Real force impacted by working environment parameters, mainly (from most important):
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

H&S for magnets
Handling guide

Handle with care. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.

Product not for children

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 necessitates immediate surgery.

Heat sensitivity

Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and strength.

Dust is flammable

Dust produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Shattering risk

NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.

Finger safety

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

GPS Danger

Be aware: neodymium magnets generate a field that confuses sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.

Warning for allergy sufferers

Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact and choose coated magnets.

Health Danger

Patients with a ICD should maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.

Data carriers

Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Important! Looking for details? Check our post: Are neodymium magnets dangerous?