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MPL 100x40x20 / N38 - lamellar magnet

lamellar magnet

Catalog no 020109

GTIN/EAN: 5906301811152

5.00

length

100 mm [±0,1 mm]

Width

40 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

600 g

Magnetization Direction

↑ axial

Load capacity

120.01 kg / 1177.33 N

Magnetic Induction

337.24 mT / 3372 Gs

Coating

[NiCuNi] Nickel

335.30 with VAT / pcs + price for transport

272.60 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
272.60 ZŁ
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Lifting power as well as structure of neodymium magnets can be calculated with our online calculation tool.

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Technical parameters - MPL 100x40x20 / N38 - lamellar magnet

Specification / characteristics - MPL 100x40x20 / N38 - lamellar magnet

properties
properties values
Cat. no. 020109
GTIN/EAN 5906301811152
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 100 mm [±0,1 mm]
Width 40 mm [±0,1 mm]
Height 20 mm [±0,1 mm]
Weight 600 g
Magnetization Direction ↑ axial
Load capacity ~ ? 120.01 kg / 1177.33 N
Magnetic Induction ~ ? 337.24 mT / 3372 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 100x40x20 / 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 simulation of the assembly - report

The following information are the result of a mathematical analysis. Values are based on models for the material Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.

Table 1: Static force (pull vs distance) - interaction chart
MPL 100x40x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3372 Gs
337.2 mT
120.01 kg / 264.58 pounds
120010.0 g / 1177.3 N
dangerous!
1 mm 3268 Gs
326.8 mT
112.70 kg / 248.45 pounds
112695.4 g / 1105.5 N
dangerous!
2 mm 3158 Gs
315.8 mT
105.27 kg / 232.09 pounds
105272.6 g / 1032.7 N
dangerous!
3 mm 3046 Gs
304.6 mT
97.92 kg / 215.88 pounds
97921.3 g / 960.6 N
dangerous!
5 mm 2818 Gs
281.8 mT
83.78 kg / 184.71 pounds
83783.3 g / 821.9 N
dangerous!
10 mm 2266 Gs
226.6 mT
54.17 kg / 119.43 pounds
54174.5 g / 531.5 N
dangerous!
15 mm 1794 Gs
179.4 mT
33.96 kg / 74.86 pounds
33955.7 g / 333.1 N
dangerous!
20 mm 1419 Gs
141.9 mT
21.25 kg / 46.84 pounds
21248.1 g / 208.4 N
dangerous!
30 mm 908 Gs
90.8 mT
8.70 kg / 19.17 pounds
8696.3 g / 85.3 N
medium risk
50 mm 416 Gs
41.6 mT
1.83 kg / 4.02 pounds
1825.4 g / 17.9 N
low risk

Table 2: Slippage load (wall)
MPL 100x40x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 24.00 kg / 52.92 pounds
24002.0 g / 235.5 N
1 mm Stal (~0.2) 22.54 kg / 49.69 pounds
22540.0 g / 221.1 N
2 mm Stal (~0.2) 21.05 kg / 46.42 pounds
21054.0 g / 206.5 N
3 mm Stal (~0.2) 19.58 kg / 43.18 pounds
19584.0 g / 192.1 N
5 mm Stal (~0.2) 16.76 kg / 36.94 pounds
16756.0 g / 164.4 N
10 mm Stal (~0.2) 10.83 kg / 23.88 pounds
10834.0 g / 106.3 N
15 mm Stal (~0.2) 6.79 kg / 14.97 pounds
6792.0 g / 66.6 N
20 mm Stal (~0.2) 4.25 kg / 9.37 pounds
4250.0 g / 41.7 N
30 mm Stal (~0.2) 1.74 kg / 3.84 pounds
1740.0 g / 17.1 N
50 mm Stal (~0.2) 0.37 kg / 0.81 pounds
366.0 g / 3.6 N

Table 3: Vertical assembly (shearing) - vertical pull
MPL 100x40x20 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
36.00 kg / 79.37 pounds
36003.0 g / 353.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
24.00 kg / 52.92 pounds
24002.0 g / 235.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
12.00 kg / 26.46 pounds
12001.0 g / 117.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
60.01 kg / 132.29 pounds
60005.0 g / 588.6 N

Table 4: Material efficiency (substrate influence) - power losses
MPL 100x40x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
4.00 kg / 8.82 pounds
4000.3 g / 39.2 N
1 mm
8%
10.00 kg / 22.05 pounds
10000.8 g / 98.1 N
2 mm
17%
20.00 kg / 44.10 pounds
20001.7 g / 196.2 N
3 mm
25%
30.00 kg / 66.14 pounds
30002.5 g / 294.3 N
5 mm
42%
50.00 kg / 110.24 pounds
50004.2 g / 490.5 N
10 mm
83%
100.01 kg / 220.48 pounds
100008.3 g / 981.1 N
11 mm
92%
110.01 kg / 242.53 pounds
110009.2 g / 1079.2 N
12 mm
100%
120.01 kg / 264.58 pounds
120010.0 g / 1177.3 N

Table 5: Thermal resistance (stability) - power drop
MPL 100x40x20 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 120.01 kg / 264.58 pounds
120010.0 g / 1177.3 N
OK
40 °C -2.2% 117.37 kg / 258.76 pounds
117369.8 g / 1151.4 N
OK
60 °C -4.4% 114.73 kg / 252.94 pounds
114729.6 g / 1125.5 N
80 °C -6.6% 112.09 kg / 247.11 pounds
112089.3 g / 1099.6 N
100 °C -28.8% 85.45 kg / 188.38 pounds
85447.1 g / 838.2 N

Table 6: Two magnets (repulsion) - field range
MPL 100x40x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 280.40 kg / 618.18 pounds
4 790 Gs
42.06 kg / 92.73 pounds
42060 g / 412.6 N
N/A
1 mm 271.97 kg / 599.59 pounds
6 642 Gs
40.80 kg / 89.94 pounds
40796 g / 400.2 N
244.77 kg / 539.63 pounds
~0 Gs
2 mm 263.31 kg / 580.50 pounds
6 535 Gs
39.50 kg / 87.08 pounds
39497 g / 387.5 N
236.98 kg / 522.45 pounds
~0 Gs
3 mm 254.63 kg / 561.37 pounds
6 427 Gs
38.20 kg / 84.21 pounds
38195 g / 374.7 N
229.17 kg / 505.24 pounds
~0 Gs
5 mm 237.35 kg / 523.26 pounds
6 205 Gs
35.60 kg / 78.49 pounds
35602 g / 349.3 N
213.61 kg / 470.93 pounds
~0 Gs
10 mm 195.76 kg / 431.58 pounds
5 635 Gs
29.36 kg / 64.74 pounds
29364 g / 288.1 N
176.18 kg / 388.42 pounds
~0 Gs
20 mm 126.58 kg / 279.06 pounds
4 531 Gs
18.99 kg / 41.86 pounds
18987 g / 186.3 N
113.92 kg / 251.15 pounds
~0 Gs
50 mm 31.47 kg / 69.38 pounds
2 259 Gs
4.72 kg / 10.41 pounds
4721 g / 46.3 N
28.32 kg / 62.44 pounds
~0 Gs
60 mm 20.32 kg / 44.80 pounds
1 815 Gs
3.05 kg / 6.72 pounds
3048 g / 29.9 N
18.29 kg / 40.32 pounds
~0 Gs
70 mm 13.38 kg / 29.50 pounds
1 473 Gs
2.01 kg / 4.42 pounds
2007 g / 19.7 N
12.04 kg / 26.55 pounds
~0 Gs
80 mm 8.98 kg / 19.80 pounds
1 207 Gs
1.35 kg / 2.97 pounds
1347 g / 13.2 N
8.08 kg / 17.82 pounds
~0 Gs
90 mm 6.14 kg / 13.53 pounds
998 Gs
0.92 kg / 2.03 pounds
920 g / 9.0 N
5.52 kg / 12.18 pounds
~0 Gs
100 mm 4.27 kg / 9.40 pounds
832 Gs
0.64 kg / 1.41 pounds
640 g / 6.3 N
3.84 kg / 8.46 pounds
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MPL 100x40x20 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 30.5 cm
Hearing aid 10 Gs (1.0 mT) 24.0 cm
Mechanical watch 20 Gs (2.0 mT) 18.5 cm
Mobile device 40 Gs (4.0 mT) 14.5 cm
Remote 50 Gs (5.0 mT) 13.5 cm
Payment card 400 Gs (40.0 mT) 5.5 cm
HDD hard drive 600 Gs (60.0 mT) 4.5 cm

Table 8: Dynamics (cracking risk) - warning
MPL 100x40x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.84 km/h
(4.96 m/s)
7.37 J
30 mm 25.80 km/h
(7.17 m/s)
15.41 J
50 mm 32.20 km/h
(8.94 m/s)
23.99 J
100 mm 45.13 km/h
(12.54 m/s)
47.14 J

Table 9: Corrosion resistance
MPL 100x40x20 / 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 (Flux)
MPL 100x40x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 131 922 Mx 1319.2 µWb
Pc Coefficient 0.38 Low (Flat)

Table 11: Submerged application
MPL 100x40x20 / N38

Environment Effective steel pull Effect
Air (land) 120.01 kg Standard
Water (riverbed) 137.41 kg
(+17.40 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

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

2. Efficiency vs thickness

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.38

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
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: 020109-2026
Magnet Unit Converter
Pulling force

Magnetic Induction

Other products

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 100x40x20 mm and a weight of 600 g, guarantees premium class connection. As a magnetic bar with high power (approx. 120.01 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 120.01 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 wind generators and material handling systems. They work great as invisible mounts 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 100x40x20 / N38, it is best to use 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 100x40x20 / N38 model is magnetized axially (dimension 20 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. 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: 100 mm (length), 40 mm (width), and 20 mm (thickness). It is a magnetic block with dimensions 100x40x20 mm and a self-weight of 600 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets effectively resist against demagnetization caused by external fields,
  • Thanks to the reflective finish, the plating of Ni-Cu-Ni, gold, or silver gives an clean appearance,
  • The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in shaping and the capacity to adapt to client solutions,
  • Fundamental importance in future technologies – they find application in hard drives, electric motors, advanced medical instruments, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Disadvantages

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing threads and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The specified lifting capacity refers to the maximum value, obtained under optimal environment, namely:
  • using a base made of mild steel, functioning as a magnetic yoke
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an ground contact surface
  • under conditions of ideal adhesion (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature room level

Key elements affecting lifting force

It is worth knowing that the application force may be lower influenced by the following factors, starting with the most relevant:
  • Clearance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be escaped into the air.
  • Steel grade – ideal substrate is high-permeability steel. Cast iron may generate lower lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Nickel coating and allergies

Certain individuals suffer from a contact allergy to nickel, which is the common plating for neodymium magnets. Prolonged contact can result in skin redness. We suggest use protective gloves.

Handling guide

Exercise caution. Rare earth magnets act from a distance and connect with massive power, often quicker than you can move away.

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Health Danger

Individuals with a ICD have to maintain an safe separation from magnets. The magnetism can stop the operation of the implant.

Crushing force

Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Precision electronics

A strong magnetic field interferes with the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.

Permanent damage

Control the heat. Exposing the magnet to high heat will destroy its magnetic structure and strength.

Do not give to children

Product intended for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of kids and pets.

Shattering risk

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them shattering into small pieces.

Magnetic media

Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Caution! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98