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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

bulk discounts:

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Specifications and appearance of a neodymium magnet can be estimated on our force calculator.

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Technical parameters - 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

Physical modeling of the product - technical parameters

The following information are the result of a mathematical calculation. Results rely on algorithms for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Use these data as a preliminary roadmap for designers.

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

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

Table 2: Slippage load (wall)
MPL 5x5x1.2 / N38

Distance (mm) Friction coefficient Pull Force (kg)
0 mm Stal (~0.2) 0.09 kg / 88.0 g
0.9 N
1 mm Stal (~0.2) 0.04 kg / 44.0 g
0.4 N
2 mm Stal (~0.2) 0.02 kg / 16.0 g
0.2 N
3 mm Stal (~0.2) 0.01 kg / 6.0 g
0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N

Table 3: Vertical assembly (shearing) - vertical pull
MPL 5x5x1.2 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 5x5x1.2 / N38

Steel thickness (mm) % power Real pull force (kg)
0.5 mm
10%
0.04 kg / 44.0 g
0.4 N
1 mm
25%
0.11 kg / 110.0 g
1.1 N
2 mm
50%
0.22 kg / 220.0 g
2.2 N
5 mm
100%
0.44 kg / 440.0 g
4.3 N
10 mm
100%
0.44 kg / 440.0 g
4.3 N

Table 5: Thermal resistance (stability) - power drop
MPL 5x5x1.2 / N38

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

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

Gap (mm) Attraction (kg) (N-S) Repulsion (kg) (N-N)
0 mm 0.92 kg / 925 g
9.1 N
4 027 Gs
N/A
1 mm 0.70 kg / 699 g
6.9 N
4 260 Gs
0.63 kg / 629 g
6.2 N
~0 Gs
2 mm 0.47 kg / 466 g
4.6 N
3 478 Gs
0.42 kg / 420 g
4.1 N
~0 Gs
3 mm 0.29 kg / 288 g
2.8 N
2 734 Gs
0.26 kg / 259 g
2.5 N
~0 Gs
5 mm 0.10 kg / 101 g
1.0 N
1 617 Gs
0.09 kg / 91 g
0.9 N
~0 Gs
10 mm 0.01 kg / 9 g
0.1 N
482 Gs
0.00 kg / 0 g
0.0 N
~0 Gs
20 mm 0.00 kg / 0 g
0.0 N
90 Gs
0.00 kg / 0 g
0.0 N
~0 Gs
50 mm 0.00 kg / 0 g
0.0 N
7 Gs
0.00 kg / 0 g
0.0 N
~0 Gs

Table 7: Protective zones (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
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

Table 8: Dynamics (kinetic energy) - 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

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)

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

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

Table 11: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For N38 grade, the max working temp is 80°C.

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

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

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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
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%
Ecology and recycling (GPSR)
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: 020171-2025
Magnet Unit Converter
Pulling force

Field Strength

Other proposals

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 5x5x1.2 mm and a weight of 0.22 g, guarantees premium class connection. As a magnetic bar with high power (approx. 0.44 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.
The key to success is sliding 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 0.44 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for hanging tools 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 two-component adhesives (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. 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. In practice, this means that this magnet has the greatest attraction force on its main planes (5x5 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 5 mm (length), 5 mm (width), and 1.2 mm (thickness). 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 protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of rare earth magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for around ten years – the drop is just ~1% (according to analyses),
  • They maintain their magnetic properties even under close interference source,
  • Thanks to the reflective finish, the plating of nickel, gold-plated, or silver-plated gives an professional 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 resistance, allowing for operation at temperatures reaching 230°C and above...
  • Considering the potential of precise shaping and customization to custom requirements, magnetic components can be created in a variety of geometric configurations, which increases their versatility,
  • Huge importance in modern industrial fields – they serve a role in hard drives, electric drive systems, advanced medical instruments, as well as industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend cover - magnetic mount, due to difficulties in producing threads inside the magnet and complicated forms.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat it depends on?

The load parameter shown refers to the limit force, measured under ideal test conditions, specifically:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • whose transverse dimension is min. 10 mm
  • with an ideally smooth touching surface
  • without any insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

During everyday use, the real power is determined by a number of factors, listed from most significant:
  • Clearance – existence of any layer (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – too thin plate does not accept the full field, causing part of the flux to be escaped to the other side.
  • Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Precautions when working with neodymium magnets
Combustion hazard

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Risk of cracking

Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Product not for children

Always keep magnets away from children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are fatal.

Bone fractures

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying anything in their path. Be careful!

Impact on smartphones

Note: rare earth magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, device, and GPS.

Pacemakers

People with a ICD must maintain an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Allergy Warning

A percentage of the population experience a contact allergy to nickel, which is the standard coating for NdFeB magnets. Prolonged contact can result in skin redness. We recommend wear safety gloves.

Conscious usage

Use magnets with awareness. Their huge power can surprise even experienced users. Stay alert and do not underestimate their power.

Safe distance

Data protection: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Heat sensitivity

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Safety First! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98