Neodymiums – complete shape selection

Looking for massive power in small size? We have in stock complete range of various shapes and sizes. They are ideal for domestic applications, garage and model making. Browse assortment available immediately.

discover price list and dimensions

Magnet fishing: strong F200/F400 sets

Start your adventure related to seabed exploration! Our double-handle grips (F200, F400) provide grip certainty and immense power. Stainless steel construction and strong lines will perform in any water.

find your set

Magnetic mounting systems

Proven solutions for fixing non-invasive. Threaded grips (external or internal) provide quick improvement of work on production halls. Perfect for mounting lighting, sensors and ads.

see technical specs

🚚 Order by 14:00 – we'll ship today!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

MPL 20x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020132

GTIN/EAN: 5906301811381

5.00

length

20 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

3.75 g

Magnetization Direction

↑ axial

Load capacity

4.42 kg / 43.32 N

Magnetic Induction

456.78 mT / 4568 Gs

Coating

[NiCuNi] Nickel

2.76 with VAT / pcs + price for transport

2.24 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
2.24 ZŁ
2.76 ZŁ
price from 300 pcs
2.11 ZŁ
2.59 ZŁ
price from 1150 pcs
1.971 ZŁ
2.42 ZŁ
Not sure which magnet to buy?

Give us a call +48 888 99 98 98 otherwise drop us a message via request form the contact page.
Specifications as well as form of a magnet can be estimated using our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

Detailed specification - MPL 20x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 20x5x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020132
GTIN/EAN 5906301811381
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 20 mm [±0,1 mm]
Width 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 3.75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.42 kg / 43.32 N
Magnetic Induction ~ ? 456.78 mT / 4568 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x5x5 / 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 magnet - technical parameters

The following data are the outcome of a physical simulation. Results are based on models for the material Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Use these data as a supplementary guide for designers.

Table 1: Static force (force vs distance) - interaction chart
MPL 20x5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4563 Gs
456.3 mT
4.42 kg / 9.74 pounds
4420.0 g / 43.4 N
medium risk
1 mm 3323 Gs
332.3 mT
2.34 kg / 5.17 pounds
2344.7 g / 23.0 N
medium risk
2 mm 2341 Gs
234.1 mT
1.16 kg / 2.56 pounds
1163.0 g / 11.4 N
low risk
3 mm 1678 Gs
167.8 mT
0.60 kg / 1.32 pounds
597.4 g / 5.9 N
low risk
5 mm 944 Gs
94.4 mT
0.19 kg / 0.42 pounds
189.2 g / 1.9 N
low risk
10 mm 320 Gs
32.0 mT
0.02 kg / 0.05 pounds
21.7 g / 0.2 N
low risk
15 mm 141 Gs
14.1 mT
0.00 kg / 0.01 pounds
4.2 g / 0.0 N
low risk
20 mm 73 Gs
7.3 mT
0.00 kg / 0.00 pounds
1.1 g / 0.0 N
low risk
30 mm 26 Gs
2.6 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Sliding load (wall)
MPL 20x5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.88 kg / 1.95 pounds
884.0 g / 8.7 N
1 mm Stal (~0.2) 0.47 kg / 1.03 pounds
468.0 g / 4.6 N
2 mm Stal (~0.2) 0.23 kg / 0.51 pounds
232.0 g / 2.3 N
3 mm Stal (~0.2) 0.12 kg / 0.26 pounds
120.0 g / 1.2 N
5 mm Stal (~0.2) 0.04 kg / 0.08 pounds
38.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MPL 20x5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.33 kg / 2.92 pounds
1326.0 g / 13.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.88 kg / 1.95 pounds
884.0 g / 8.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.44 kg / 0.97 pounds
442.0 g / 4.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.21 kg / 4.87 pounds
2210.0 g / 21.7 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 20x5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.44 kg / 0.97 pounds
442.0 g / 4.3 N
1 mm
25%
1.11 kg / 2.44 pounds
1105.0 g / 10.8 N
2 mm
50%
2.21 kg / 4.87 pounds
2210.0 g / 21.7 N
3 mm
75%
3.32 kg / 7.31 pounds
3315.0 g / 32.5 N
5 mm
100%
4.42 kg / 9.74 pounds
4420.0 g / 43.4 N
10 mm
100%
4.42 kg / 9.74 pounds
4420.0 g / 43.4 N
11 mm
100%
4.42 kg / 9.74 pounds
4420.0 g / 43.4 N
12 mm
100%
4.42 kg / 9.74 pounds
4420.0 g / 43.4 N

Table 5: Thermal stability (material behavior) - thermal limit
MPL 20x5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.42 kg / 9.74 pounds
4420.0 g / 43.4 N
OK
40 °C -2.2% 4.32 kg / 9.53 pounds
4322.8 g / 42.4 N
OK
60 °C -4.4% 4.23 kg / 9.32 pounds
4225.5 g / 41.5 N
80 °C -6.6% 4.13 kg / 9.10 pounds
4128.3 g / 40.5 N
100 °C -28.8% 3.15 kg / 6.94 pounds
3147.0 g / 30.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 20x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 12.84 kg / 28.30 pounds
5 504 Gs
1.93 kg / 4.24 pounds
1925 g / 18.9 N
N/A
1 mm 9.53 kg / 21.01 pounds
7 864 Gs
1.43 kg / 3.15 pounds
1430 g / 14.0 N
8.58 kg / 18.91 pounds
~0 Gs
2 mm 6.81 kg / 15.01 pounds
6 647 Gs
1.02 kg / 2.25 pounds
1021 g / 10.0 N
6.13 kg / 13.51 pounds
~0 Gs
3 mm 4.79 kg / 10.57 pounds
5 577 Gs
0.72 kg / 1.59 pounds
719 g / 7.1 N
4.31 kg / 9.51 pounds
~0 Gs
5 mm 2.40 kg / 5.30 pounds
3 949 Gs
0.36 kg / 0.79 pounds
360 g / 3.5 N
2.16 kg / 4.77 pounds
~0 Gs
10 mm 0.55 kg / 1.21 pounds
1 888 Gs
0.08 kg / 0.18 pounds
82 g / 0.8 N
0.49 kg / 1.09 pounds
~0 Gs
20 mm 0.06 kg / 0.14 pounds
640 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
0.06 kg / 0.13 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
84 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
53 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
35 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
24 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
18 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
13 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 20x5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 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: Dynamics (cracking risk) - collision effects
MPL 20x5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.73 km/h
(9.65 m/s)
0.17 J
30 mm 59.97 km/h
(16.66 m/s)
0.52 J
50 mm 77.42 km/h
(21.51 m/s)
0.87 J
100 mm 109.49 km/h
(30.41 m/s)
1.73 J

Table 9: Corrosion resistance
MPL 20x5x5 / 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 (Pc)
MPL 20x5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 4 204 Mx 42.0 µWb
Pc Coefficient 0.54 Low (Flat)

Table 11: Submerged application
MPL 20x5x5 / N38

Environment Effective steel pull Effect
Air (land) 4.42 kg Standard
Water (riverbed) 5.06 kg
(+0.64 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. Shear force

*Note: On a vertical surface, the magnet holds just ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. computer case) severely weakens the holding force.

3. Temperature resistance

*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) = 0.54

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: 020132-2026
Magnet Unit Converter
Magnet pull force

Field Strength

Check out also offers

Component MPL 20x5x5 / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 43.32 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 20x5x5 / 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.
Plate magnets MPL 20x5x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 4.42 kg), they are ideal as closers in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 20x5x5 / N38, it is best to use 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).
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: 20 mm (length), 5 mm (width), and 5 mm (thickness). The key parameter here is the holding force amounting to approximately 4.42 kg (force ~43.32 N), which, with such a flat shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
  • They maintain their magnetic properties even under strong external field,
  • A magnet with a smooth gold surface has an effective appearance,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of detailed modeling as well as adapting to specific conditions,
  • Huge importance in future technologies – they are used in mass storage devices, electric motors, medical devices, also complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in producing nuts and complicated shapes in magnets, we recommend using a housing - magnetic holder.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?

The specified lifting capacity refers to the peak performance, measured under ideal test conditions, meaning:
  • with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • with an ground touching surface
  • with direct contact (no paint)
  • during pulling in a direction vertical to the plane
  • at standard ambient temperature

Practical lifting capacity: influencing factors

Please note that the working load will differ influenced by elements below, starting with the most relevant:
  • Gap (between the magnet and the metal), as 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).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets
Caution required

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

Machining danger

Dust generated during grinding of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Heat warning

Keep cool. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Safe distance

Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Risk of cracking

Beware of splinters. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.

Compass and GPS

An intense magnetic field disrupts the operation of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to avoid damaging the sensors.

Serious injuries

Large magnets can crush fingers instantly. Under no circumstances put your hand betwixt two strong magnets.

Keep away from children

Product intended for adults. Small elements can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Medical implants

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Caution! More info 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