MPL 100x40x20 / N38 - lamellar magnet
lamellar magnet
Catalog no 020109
GTIN/EAN: 5906301811152
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 ZŁ with VAT / pcs + price for transport
272.60 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical parameters - MPL 100x40x20 / N38 - lamellar magnet
Specification / characteristics - MPL 100x40x20 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020109 |
| GTIN/EAN | 5906301811152 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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 |
|
4.00 kg / 8.82 pounds
4000.3 g / 39.2 N
|
| 1 mm |
|
10.00 kg / 22.05 pounds
10000.8 g / 98.1 N
|
| 2 mm |
|
20.00 kg / 44.10 pounds
20001.7 g / 196.2 N
|
| 3 mm |
|
30.00 kg / 66.14 pounds
30002.5 g / 294.3 N
|
| 5 mm |
|
50.00 kg / 110.24 pounds
50004.2 g / 490.5 N
|
| 10 mm |
|
100.01 kg / 220.48 pounds
100008.3 g / 981.1 N
|
| 11 mm |
|
110.01 kg / 242.53 pounds
110009.2 g / 1079.2 N
|
| 12 mm |
|
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% |
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.
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 |
Other products
Advantages and disadvantages of neodymium magnets.
Strengths
- 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
- 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?
- 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
- 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.
