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MPL 5x5x1.2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020171

GTIN/EAN: 5906301811770

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.2 mm [±0,1 mm]

Weight

0.22 g

Magnetization Direction

↑ axial

Load capacity

0.44 kg / 4.28 N

Magnetic Induction

245.17 mT / 2452 Gs

Coating

[NiCuNi] Nickel

0.1845 with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Technical specification of the product - MPL 5x5x1.2 / N38 - lamellar magnet

Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020171
GTIN/EAN 5906301811770
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 5 mm [±0,1 mm]
Width 5 mm [±0,1 mm]
Height 1.2 mm [±0,1 mm]
Weight 0.22 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.44 kg / 4.28 N
Magnetic Induction ~ ? 245.17 mT / 2452 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.2 / 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 product - report

These data are the outcome of a mathematical analysis. Values were calculated on models for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (force vs distance) - power drop
MPL 5x5x1.2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2450 Gs
245.0 mT
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
safe
1 mm 1739 Gs
173.9 mT
0.22 kg / 0.49 LBS
221.8 g / 2.2 N
safe
2 mm 1054 Gs
105.4 mT
0.08 kg / 0.18 LBS
81.4 g / 0.8 N
safe
3 mm 622 Gs
62.2 mT
0.03 kg / 0.06 LBS
28.4 g / 0.3 N
safe
5 mm 241 Gs
24.1 mT
0.00 kg / 0.01 LBS
4.3 g / 0.0 N
safe
10 mm 45 Gs
4.5 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
safe
15 mm 15 Gs
1.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
20 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
30 mm 2 Gs
0.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Vertical load (vertical surface)
MPL 5x5x1.2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.19 LBS
88.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.10 LBS
44.0 g / 0.4 N
2 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 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 (sliding) - vertical pull
MPL 5x5x1.2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.29 LBS
132.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.22 kg / 0.49 LBS
220.0 g / 2.2 N

Table 4: Steel thickness (substrate influence) - power losses
MPL 5x5x1.2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.24 LBS
110.0 g / 1.1 N
2 mm
50%
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
3 mm
75%
0.33 kg / 0.73 LBS
330.0 g / 3.2 N
5 mm
100%
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
10 mm
100%
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
11 mm
100%
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
12 mm
100%
0.44 kg / 0.97 LBS
440.0 g / 4.3 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 5x5x1.2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
OK
40 °C -2.2% 0.43 kg / 0.95 LBS
430.3 g / 4.2 N
OK
60 °C -4.4% 0.42 kg / 0.93 LBS
420.6 g / 4.1 N
80 °C -6.6% 0.41 kg / 0.91 LBS
411.0 g / 4.0 N
100 °C -28.8% 0.31 kg / 0.69 LBS
313.3 g / 3.1 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 5x5x1.2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.92 kg / 2.04 LBS
4 027 Gs
0.14 kg / 0.31 LBS
139 g / 1.4 N
N/A
1 mm 0.70 kg / 1.54 LBS
4 260 Gs
0.10 kg / 0.23 LBS
105 g / 1.0 N
0.63 kg / 1.39 LBS
~0 Gs
2 mm 0.47 kg / 1.03 LBS
3 478 Gs
0.07 kg / 0.15 LBS
70 g / 0.7 N
0.42 kg / 0.93 LBS
~0 Gs
3 mm 0.29 kg / 0.63 LBS
2 734 Gs
0.04 kg / 0.10 LBS
43 g / 0.4 N
0.26 kg / 0.57 LBS
~0 Gs
5 mm 0.10 kg / 0.22 LBS
1 617 Gs
0.02 kg / 0.03 LBS
15 g / 0.1 N
0.09 kg / 0.20 LBS
~0 Gs
10 mm 0.01 kg / 0.02 LBS
482 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
90 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
50 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
60 mm 0.00 kg / 0.00 LBS
4 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
3 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
2 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
1 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
1 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 5x5x1.2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.5 cm
Hearing aid 10 Gs (1.0 mT) 2.0 cm
Mechanical watch 20 Gs (2.0 mT) 1.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Impact energy (kinetic energy) - warning
MPL 5x5x1.2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 45.11 km/h
(12.53 m/s)
0.02 J
30 mm 78.12 km/h
(21.70 m/s)
0.05 J
50 mm 100.85 km/h
(28.01 m/s)
0.09 J
100 mm 142.63 km/h
(39.62 m/s)
0.17 J

Table 9: Corrosion resistance
MPL 5x5x1.2 / 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 (Pc)
MPL 5x5x1.2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 695 Mx 7.0 µWb
Pc Coefficient 0.30 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 5x5x1.2 / N38

Environment Effective steel pull Effect
Air (land) 0.44 kg Standard
Water (riverbed) 0.50 kg
(+0.06 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 wall, the magnet holds just a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.30

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 specification and ecology
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%
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: 020171-2026
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Pulling force

Magnetic Induction

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Component MPL 5x5x1.2 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 4.28 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
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. To separate the MPL 5x5x1.2 / 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 5x5x1.2 / 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 5x5x1.2 / 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.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 5x5x1.2 mm, which, at a weight of 0.22 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 0.44 kg (force ~4.28 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of neodymium magnets.

Advantages

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They do not lose strength, even after around ten years – the decrease in strength is only ~1% (based on measurements),
  • Magnets effectively protect themselves against demagnetization caused by foreign field sources,
  • In other words, due to the shiny layer of gold, the element is aesthetically pleasing,
  • Neodymium magnets ensure maximum magnetic induction on a their surface, which increases force concentration,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to modularity in shaping and the ability to customize to client solutions,
  • Key role in modern industrial fields – they serve a role in data components, electric drive systems, diagnostic systems, and complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Limited possibility of making threads in the magnet and complex forms - recommended is a housing - magnet mounting.
  • Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, tiny parts of these products can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum magnetic pulling forcewhat affects it?

Breakaway force is the result of a measurement for the most favorable conditions, assuming:
  • on a block made of mild steel, effectively closing the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • with an polished contact surface
  • with zero gap (no paint)
  • under vertical force direction (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Bear in mind that the working load may be lower depending on the following factors, in order of importance:
  • Air gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was determined by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Handling guide

Handle with care. Rare earth magnets act from a distance and connect with massive power, often faster than you can react.

Machining danger

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Precision electronics

Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your mobile, device, and GPS.

Magnet fragility

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Medical implants

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

Electronic hazard

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, timepieces).

Crushing force

Large magnets can crush fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Keep away from children

Strictly store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are life-threatening.

Nickel allergy

Studies show that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, prevent touching magnets with bare hands or opt for versions in plastic housing.

Operating temperature

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Caution! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98