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
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Physical properties - 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 |
Technical analysis of the magnet - technical parameters
Presented data constitute the direct effect of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static force (force 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 LBS
120010.0 g / 1177.3 N
|
dangerous! |
| 1 mm |
3268 Gs
326.8 mT
|
112.70 kg / 248.45 LBS
112695.4 g / 1105.5 N
|
dangerous! |
| 2 mm |
3158 Gs
315.8 mT
|
105.27 kg / 232.09 LBS
105272.6 g / 1032.7 N
|
dangerous! |
| 3 mm |
3046 Gs
304.6 mT
|
97.92 kg / 215.88 LBS
97921.3 g / 960.6 N
|
dangerous! |
| 5 mm |
2818 Gs
281.8 mT
|
83.78 kg / 184.71 LBS
83783.3 g / 821.9 N
|
dangerous! |
| 10 mm |
2266 Gs
226.6 mT
|
54.17 kg / 119.43 LBS
54174.5 g / 531.5 N
|
dangerous! |
| 15 mm |
1794 Gs
179.4 mT
|
33.96 kg / 74.86 LBS
33955.7 g / 333.1 N
|
dangerous! |
| 20 mm |
1419 Gs
141.9 mT
|
21.25 kg / 46.84 LBS
21248.1 g / 208.4 N
|
dangerous! |
| 30 mm |
908 Gs
90.8 mT
|
8.70 kg / 19.17 LBS
8696.3 g / 85.3 N
|
warning |
| 50 mm |
416 Gs
41.6 mT
|
1.83 kg / 4.02 LBS
1825.4 g / 17.9 N
|
safe |
Table 2: Sliding capacity (vertical surface)
MPL 100x40x20 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
24.00 kg / 52.92 LBS
24002.0 g / 235.5 N
|
| 1 mm | Stal (~0.2) |
22.54 kg / 49.69 LBS
22540.0 g / 221.1 N
|
| 2 mm | Stal (~0.2) |
21.05 kg / 46.42 LBS
21054.0 g / 206.5 N
|
| 3 mm | Stal (~0.2) |
19.58 kg / 43.18 LBS
19584.0 g / 192.1 N
|
| 5 mm | Stal (~0.2) |
16.76 kg / 36.94 LBS
16756.0 g / 164.4 N
|
| 10 mm | Stal (~0.2) |
10.83 kg / 23.88 LBS
10834.0 g / 106.3 N
|
| 15 mm | Stal (~0.2) |
6.79 kg / 14.97 LBS
6792.0 g / 66.6 N
|
| 20 mm | Stal (~0.2) |
4.25 kg / 9.37 LBS
4250.0 g / 41.7 N
|
| 30 mm | Stal (~0.2) |
1.74 kg / 3.84 LBS
1740.0 g / 17.1 N
|
| 50 mm | Stal (~0.2) |
0.37 kg / 0.81 LBS
366.0 g / 3.6 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 LBS
36003.0 g / 353.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
24.00 kg / 52.92 LBS
24002.0 g / 235.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
12.00 kg / 26.46 LBS
12001.0 g / 117.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
60.01 kg / 132.29 LBS
60005.0 g / 588.6 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 100x40x20 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
4.00 kg / 8.82 LBS
4000.3 g / 39.2 N
|
| 1 mm |
|
10.00 kg / 22.05 LBS
10000.8 g / 98.1 N
|
| 2 mm |
|
20.00 kg / 44.10 LBS
20001.7 g / 196.2 N
|
| 3 mm |
|
30.00 kg / 66.14 LBS
30002.5 g / 294.3 N
|
| 5 mm |
|
50.00 kg / 110.24 LBS
50004.2 g / 490.5 N
|
| 10 mm |
|
100.01 kg / 220.48 LBS
100008.3 g / 981.1 N
|
| 11 mm |
|
110.01 kg / 242.53 LBS
110009.2 g / 1079.2 N
|
| 12 mm |
|
120.01 kg / 264.58 LBS
120010.0 g / 1177.3 N
|
Table 5: Working in heat (material behavior) - 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 LBS
120010.0 g / 1177.3 N
|
OK |
| 40 °C | -2.2% |
117.37 kg / 258.76 LBS
117369.8 g / 1151.4 N
|
OK |
| 60 °C | -4.4% |
114.73 kg / 252.94 LBS
114729.6 g / 1125.5 N
|
|
| 80 °C | -6.6% |
112.09 kg / 247.11 LBS
112089.3 g / 1099.6 N
|
|
| 100 °C | -28.8% |
85.45 kg / 188.38 LBS
85447.1 g / 838.2 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 100x40x20 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
280.40 kg / 618.18 LBS
4 790 Gs
|
42.06 kg / 92.73 LBS
42060 g / 412.6 N
|
N/A |
| 1 mm |
271.97 kg / 599.59 LBS
6 642 Gs
|
40.80 kg / 89.94 LBS
40796 g / 400.2 N
|
244.77 kg / 539.63 LBS
~0 Gs
|
| 2 mm |
263.31 kg / 580.50 LBS
6 535 Gs
|
39.50 kg / 87.08 LBS
39497 g / 387.5 N
|
236.98 kg / 522.45 LBS
~0 Gs
|
| 3 mm |
254.63 kg / 561.37 LBS
6 427 Gs
|
38.20 kg / 84.21 LBS
38195 g / 374.7 N
|
229.17 kg / 505.24 LBS
~0 Gs
|
| 5 mm |
237.35 kg / 523.26 LBS
6 205 Gs
|
35.60 kg / 78.49 LBS
35602 g / 349.3 N
|
213.61 kg / 470.93 LBS
~0 Gs
|
| 10 mm |
195.76 kg / 431.58 LBS
5 635 Gs
|
29.36 kg / 64.74 LBS
29364 g / 288.1 N
|
176.18 kg / 388.42 LBS
~0 Gs
|
| 20 mm |
126.58 kg / 279.06 LBS
4 531 Gs
|
18.99 kg / 41.86 LBS
18987 g / 186.3 N
|
113.92 kg / 251.15 LBS
~0 Gs
|
| 50 mm |
31.47 kg / 69.38 LBS
2 259 Gs
|
4.72 kg / 10.41 LBS
4721 g / 46.3 N
|
28.32 kg / 62.44 LBS
~0 Gs
|
| 60 mm |
20.32 kg / 44.80 LBS
1 815 Gs
|
3.05 kg / 6.72 LBS
3048 g / 29.9 N
|
18.29 kg / 40.32 LBS
~0 Gs
|
| 70 mm |
13.38 kg / 29.50 LBS
1 473 Gs
|
2.01 kg / 4.42 LBS
2007 g / 19.7 N
|
12.04 kg / 26.55 LBS
~0 Gs
|
| 80 mm |
8.98 kg / 19.80 LBS
1 207 Gs
|
1.35 kg / 2.97 LBS
1347 g / 13.2 N
|
8.08 kg / 17.82 LBS
~0 Gs
|
| 90 mm |
6.14 kg / 13.53 LBS
998 Gs
|
0.92 kg / 2.03 LBS
920 g / 9.0 N
|
5.52 kg / 12.18 LBS
~0 Gs
|
| 100 mm |
4.27 kg / 9.40 LBS
832 Gs
|
0.64 kg / 1.41 LBS
640 g / 6.3 N
|
3.84 kg / 8.46 LBS
~0 Gs
|
Table 7: Safety (HSE) (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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 14.5 cm |
| Car key | 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: Impact energy (cracking risk) - collision effects
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: Surface protection spec
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: Electrical data (Pc)
MPL 100x40x20 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 131 922 Mx | 1319.2 µWb |
| Pc Coefficient | 0.38 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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. Sliding resistance
*Warning: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.
3. Thermal stability
*For standard magnets, 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.
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 |
View also deals
Strengths and weaknesses of neodymium magnets.
Benefits
- They retain attractive force for almost ten years – the loss is just ~1% (based on simulations),
- They show high resistance to demagnetization induced by external magnetic fields,
- By using a reflective coating of silver, the element has an nice look,
- Magnets are characterized by excellent magnetic induction on the outer side,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Possibility of precise shaping and optimizing to defined requirements,
- Key role in modern technologies – they are commonly used in hard drives, drive modules, diagnostic systems, also modern systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Limitations
- Susceptibility to cracking 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 increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in realizing nuts and complicated shapes in magnets, we recommend using a housing - magnetic mount.
- Health risk resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Additionally, small components of these magnets can disrupt the diagnostic process medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- on a plate made of structural steel, perfectly concentrating the magnetic flux
- with a thickness no less than 10 mm
- with an polished touching surface
- without the slightest air gap between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- in temp. approx. 20°C
What influences lifting capacity in practice
- Distance (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
- Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Base massiveness – too thin sheet does not accept the full field, causing part of the power to be wasted to the other side.
- Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.
H&S for magnets
Immense force
Handle with care. Neodymium magnets act from a distance and snap with massive power, often quicker than you can react.
Magnets are brittle
Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.
Combustion hazard
Dust produced during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Magnetic media
Very strong magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Bone fractures
Big blocks can crush fingers in a fraction of a second. Do not put your hand between two attracting surfaces.
GPS Danger
Remember: neodymium magnets generate a field that confuses sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.
Implant safety
Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Swallowing risk
Always keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are life-threatening.
Avoid contact if allergic
It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, prevent touching magnets with bare hands and choose coated magnets.
Maximum temperature
Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.
