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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

check technical specifications »

0.1845 ZŁ with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Physical properties - 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 modeling of the assembly - data

These values are the result of a physical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Please consider these data as a supplementary guide when designing systems.

Table 1: Static 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
 low risk
1 mm 1739 Gs
173.9 mT
 0.22 kg / 0.49 LBS
221.8 g / 2.2 N
 low risk
2 mm 1054 Gs
105.4 mT
 0.08 kg / 0.18 LBS
81.4 g / 0.8 N
 low risk
3 mm 622 Gs
62.2 mT
 0.03 kg / 0.06 LBS
28.4 g / 0.3 N
 low risk
5 mm 241 Gs
24.1 mT
 0.00 kg / 0.01 LBS
4.3 g / 0.0 N
 low risk
10 mm 45 Gs
4.5 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 low risk
15 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
20 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
30 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
50 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Magnetic force decreases sharply per each millimeter of spacing. Remember that even a very thin break (e.g., dirt, paint, dust) significantly weakens the grip. Neodymiums work optimally at the point of direct contact; air break kills the power. Analyze how flashily the load capacity fall, when the product does not touch tightly to the metal substrate. When designing the mounting, eliminate additional spacers.

Table 2: Shear force (wall)
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
The table below presents the theoretical force necessary to initiate the downward movement of the magnet downwards against a vertical metal surface (considering standard friction). This parameter depends on the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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
When hanging a element on a vertical surface (e.g., a fridge), it will only hold only about 1/5 of its maximum pull force. Gravity as well as a low friction coefficient cause that products slip faster than they pull off. Want to create a vertical fastening? Consider that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the element will slip down under a much lighter load. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
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
A thin sheet is unable to absorb the full magnetic flux, which wastes potential of the holder. If you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the pull force will drop sharply. To squeeze 100% of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation effect causes that on thin elements (e.g., car bodies), the product works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - power drop
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
Classic neodymiums irreversibly lose power after exceeding the maximum temperature. Watch out for overheating – excessive heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's force temporarily lowers. Refrain from using this product near heat sources higher than its working range. Exceeding the critical threshold will result in permanent loss of magnetism.
*Engineering note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (pancake types) may lose charge permanently under lower heat stress than long magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MPL 5x5x1.2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (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
Two strong neodymiums interact from a significantly greater distance than a neodymium and metal setup. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of operation. Designing a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the impact force is huge. The levitation is slightly lower than the attraction, but still large.
*The magnetic induction between like poles reaches ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
* Figures refer to sliding force of dual same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - 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
Timepiece 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
Powerful magnet radiation poses a real danger to IT equipment as well as medical implants. These magnets produce a field that disrupts operation of digital equipment. Notice: the invisible magnetic field acts through matter and housings. Special caution must be taken by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
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
Magnetic elements are prone to chipping – a violent impact against metal causes immediate chipping. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can cause material chips or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear eye protection when playing with powerful specimens.

Table 9: Coating parameters (durability)
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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MPL 5x5x1.2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 695 Mx 7.0 µWb
Pc Coefficient 0.30 Low (Flat)
Flux value emitted by the magnet pole. Essential parameter for generator designers and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Submerged application
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.
1. Vertical hold

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

2. Steel saturation

*Thin steel (e.g. computer case) significantly reduces the holding force.

3. Heat tolerance

*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) = 0.30

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.

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%
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
Quick Unit Converter
Force (pull)
Magnetic Induction
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Component MPL 5x5x1.2 / 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. 0.44 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. 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 care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 0.44 kg), they are ideal as hidden locks 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.
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.
Standardly, the MPL 5x5x1.2 / N38 model is magnetized axially (dimension 1.2 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 5x5x1.2 mm, which, at a weight of 0.22 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 5x5x1.2 mm and a self-weight of 0.22 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around ten years it decreases only by ~1% (theoretically),
  • They are resistant to demagnetization induced by external disturbances,
  • A magnet with a shiny nickel surface looks better,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in designing and the ability to adapt to individual projects,
  • Universal use in electronics industry – they serve a role in computer drives, electric motors, diagnostic systems, as well as modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing nuts and complicated shapes in magnets, we recommend using casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. It is also worth noting that small components of these products can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a measurement result conducted under standard conditions:
  • using a sheet made of low-carbon steel, functioning as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

In practice, the real power is determined by many variables, listed from most significant:
  • Air gap (between the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Plate thickness – too thin steel does not accept the full field, causing part of the power to be escaped into the air.
  • Steel type – low-carbon steel attracts best. Alloy steels reduce magnetic properties and holding force.
  • Smoothness – full contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
ICD Warning

Patients with a ICD should maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.

Dust explosion hazard

Machining of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Pinching danger

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Electronic hazard

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

Material brittleness

Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and use protective gear.

Thermal limits

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Keep away from children

Product intended for adults. Small elements can be swallowed, leading to serious injuries. Store out of reach of kids and pets.

Magnetic interference

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Do not underestimate power

Use magnets with awareness. Their huge power can surprise even professionals. Plan your moves and do not underestimate their force.

Danger! Looking for details? Read our article: Are neodymium magnets dangerous?