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MPL 5x5x1.5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020172

GTIN/EAN: 5906301811787

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.28 g

Magnetization Direction

↑ axial

Load capacity

0.58 kg / 5.68 N

Magnetic Induction

293.49 mT / 2935 Gs

Coating

[NiCuNi] Nickel

technical details »

0.1845 ZŁ with VAT / pcs + price for transport

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

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

properties
properties values
Cat. no. 020172
GTIN/EAN 5906301811787
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 1.5 mm [±0,1 mm]
Weight 0.28 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.58 kg / 5.68 N
Magnetic Induction ~ ? 293.49 mT / 2935 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.5 / 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

Engineering modeling of the assembly - data

Presented data represent the outcome of a engineering analysis. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these data as a reference point during assembly planning.

Table 1: Static pull force (force vs gap) - interaction chart
MPL 5x5x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2932 Gs
293.2 mT
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
 low risk
1 mm 2036 Gs
203.6 mT
 0.28 kg / 0.62 lbs
279.6 g / 2.7 N
 low risk
2 mm 1228 Gs
122.8 mT
 0.10 kg / 0.22 lbs
101.7 g / 1.0 N
 low risk
3 mm 727 Gs
72.7 mT
 0.04 kg / 0.08 lbs
35.7 g / 0.3 N
 low risk
5 mm 285 Gs
28.5 mT
 0.01 kg / 0.01 lbs
5.5 g / 0.1 N
 low risk
10 mm 54 Gs
5.4 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 low risk
15 mm 18 Gs
1.8 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
20 mm 8 Gs
0.8 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
30 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
Magnetic force weakens sharply with every mm of gap. Note that even a very thin break (e.g., contamination, varnish, dust) significantly weakens the grip. Magnets operate most effectively in perfect adhesion; air break weakens the power. Observe how quickly the parameters drop, when the product does not touch flatly to the metal substrate. When calculating the assembly, avoid unnecessary gaps.

Table 2: Slippage force (vertical surface)
MPL 5x5x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.12 kg / 0.26 lbs
116.0 g / 1.1 N
1 mm Stal (~0.2) 0.06 kg / 0.12 lbs
56.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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
This section calculates the theoretical shear load needed to initiate the slippage of the magnet vertically along a vertical steel plate (considering typical friction coefficient). The holding force is a function of the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 5x5x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.12 kg / 0.26 lbs
116.0 g / 1.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.06 kg / 0.13 lbs
58.0 g / 0.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.29 kg / 0.64 lbs
290.0 g / 2.8 N
When mounting a magnet on a vertical wall (e.g., a car body), it you can count on only approx. 20%-30% of nominal attraction strength. Gravity and a low friction coefficient influence the fact that magnets slip faster than they pull off. Want to create a wall mount? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a smooth steel, the holder will slip down under a significantly smaller cargo. Utilizing a rubberized coating can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MPL 5x5x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.06 kg / 0.13 lbs
58.0 g / 0.6 N
1 mm
25%
 0.15 kg / 0.32 lbs
145.0 g / 1.4 N
2 mm
50%
 0.29 kg / 0.64 lbs
290.0 g / 2.8 N
3 mm
75%
 0.43 kg / 0.96 lbs
435.0 g / 4.3 N
5 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
10 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
11 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
12 mm
100%
 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
A thin sheet is incapable of focus the full magnetic flux, which wastes potential of the magnet. Should you install a neodymium to a thin surface, the field will penetrate right through and the pull force will drop sharply. To utilize full efficiency of this magnet's potential, you need a suitably thick piece of metal. The saturation effect means that on delicate walls (e.g., thin profiles), the magnet holds weaker. We advise picking the steel dimension based on the following data.

Table 5: Working in heat (material behavior) - thermal limit
MPL 5x5x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.58 kg / 1.28 lbs
580.0 g / 5.7 N
 OK
40 °C -2.2% 0.57 kg / 1.25 lbs
567.2 g / 5.6 N
 OK
60 °C -4.4% 0.55 kg / 1.22 lbs
554.5 g / 5.4 N
80 °C -6.6% 0.54 kg / 1.19 lbs
541.7 g / 5.3 N
100 °C -28.8% 0.41 kg / 0.91 lbs
413.0 g / 4.1 N
Ordinary NdFeB products lose parameters above the temperature limit. Avoid high temperatures – heat can permanently demagnetize this product. As the temperature rises, the neodymium's capacity temporarily decreases. Refrain from using this magnet close to heaters higher than its operating temperature limit. Exceeding the critical threshold will cause permanent loss of magnetism.
*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.33 kg / 2.92 lbs
4 518 Gs
0.20 kg / 0.44 lbs
199 g / 1.9 N
 N/A
1 mm 0.97 kg / 2.15 lbs
5 027 Gs
0.15 kg / 0.32 lbs
146 g / 1.4 N
 0.88 kg / 1.93 lbs
~0 Gs
2 mm 0.64 kg / 1.41 lbs
4 071 Gs
0.10 kg / 0.21 lbs
96 g / 0.9 N
 0.57 kg / 1.27 lbs
~0 Gs
3 mm 0.39 kg / 0.86 lbs
3 188 Gs
0.06 kg / 0.13 lbs
59 g / 0.6 N
 0.35 kg / 0.78 lbs
~0 Gs
5 mm 0.14 kg / 0.30 lbs
1 886 Gs
0.02 kg / 0.05 lbs
21 g / 0.2 N
 0.12 kg / 0.27 lbs
~0 Gs
10 mm 0.01 kg / 0.03 lbs
569 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
108 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
9 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
5 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
2 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 attract each other from a significantly greater distance than a neodymium and metal combination. The setup of two magnets produces a massive flux and a further horizon of action. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the pinch force is massive. The levitation is marginally weaker than the attraction, but still large.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Results apply to shear force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - warnings
MPL 5x5x1.5 / 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) 1.5 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 is a serious hazard to electronics as well as medical implants. These neodymiums generate a flux that prevents correct functioning of digital equipment. Remember: the unseen radiation penetrates the body and plastic. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MPL 5x5x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 45.91 km/h
(12.75 m/s)
 0.02 J
30 mm 79.50 km/h
(22.08 m/s)
 0.07 J
50 mm 102.64 km/h
(28.51 m/s)
 0.11 J
100 mm 145.15 km/h
(40.32 m/s)
 0.23 J
Magnetic elements are prone to chipping – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Impact energy can cause material chips or dangerous crushing to fingers. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
MPL 5x5x1.5 / 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. Improper coating selection is the most common cause of magnet failure over time.

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

Parameter Value SI Unit / Description
Magnetic Flux 799 Mx 8.0 µWb
Pc Coefficient 0.36 Low (Flat)
Flux value passing through the pole surface. Key data for generator designers as well as sensors. Pc value determines the working geometry.

Table 11: Physics of underwater searching
MPL 5x5x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.58 kg Standard
Water (riverbed) 0.66 kg
(+0.08 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Shear force

*Caution: On a vertical surface, the magnet retains merely approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.36

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%
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: 020172-2026
Measurement Calculator
Magnet pull force
Magnetic Field
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Component MPL 5x5x1.5 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. As a magnetic bar with high power (approx. 0.58 kg), this product is available off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 5x5x1.5 / 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. 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. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. 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. 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.
The presented product is a neodymium magnet with precisely defined parameters: 5 mm (length), 5 mm (width), and 1.5 mm (thickness). The key parameter here is the holding force amounting to approximately 0.58 kg (force ~5.68 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Strengths as well as weaknesses of neodymium magnets.

Benefits

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • Their power is durable, and after approximately ten years it decreases only by ~1% (according to research),
  • They retain their magnetic properties even under external field action,
  • By applying a smooth layer of nickel, the element has an aesthetic look,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which increases force concentration,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of precise machining as well as adapting to individual needs,
  • Significant place in high-tech industry – they are commonly used in computer drives, electric motors, advanced medical instruments, as well as industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

The force parameter is a measurement result executed under the following configuration:
  • with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by smoothness
  • with direct contact (no paint)
  • during pulling in a direction perpendicular to the plane
  • at standard ambient temperature

Lifting capacity in practice – influencing factors

In real-world applications, the actual lifting capacity depends on several key aspects, listed from most significant:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Plate texture – ground elements guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
  • Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the holding force.

Safe handling of NdFeB magnets
Implant safety

Patients with a ICD have to keep an safe separation from magnets. The magnetic field can interfere with the operation of the implant.

Shattering risk

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Dust is flammable

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Allergy Warning

Certain individuals suffer from a sensitization to Ni, which is the standard coating for neodymium magnets. Extended handling can result in dermatitis. We strongly advise use safety gloves.

Operating temperature

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

Electronic devices

Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Pinching danger

Big blocks can smash fingers instantly. Do not put your hand between two strong magnets.

Phone sensors

A strong magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a smartphone to avoid damaging the sensors.

Keep away from children

Adult use only. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of kids and pets.

Do not underestimate power

Exercise caution. Rare earth magnets act from a long distance and snap with huge force, often quicker than you can move away.

Security! Learn more about risks in the article: Magnet Safety Guide.