MPL 35x35x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020144
GTIN/EAN: 5906301811503
length
35 mm [±0,1 mm]
Width
35 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
91.88 g
Magnetization Direction
↑ axial
Load capacity
26.88 kg / 263.71 N
Magnetic Induction
282.90 mT / 2829 Gs
Coating
[NiCuNi] Nickel
35.10 ZŁ with VAT / pcs + price for transport
28.54 ZŁ net + 23% VAT / pcs
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Technical specification - MPL 35x35x10 / N38 - lamellar magnet
Specification / characteristics - MPL 35x35x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020144 |
| GTIN/EAN | 5906301811503 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 35 mm [±0,1 mm] |
| Width | 35 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 91.88 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 26.88 kg / 263.71 N |
| Magnetic Induction ~ ? | 282.90 mT / 2829 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 modeling of the assembly - data
Presented values are the result of a mathematical calculation. Values are based on models for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these data as a reference point for designers.
Table 1: Static pull force (pull vs distance) - interaction chart
MPL 35x35x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2829 Gs
282.9 mT
|
26.88 kg / 59.26 LBS
26880.0 g / 263.7 N
|
critical level |
| 1 mm |
2727 Gs
272.7 mT
|
24.98 kg / 55.08 LBS
24982.7 g / 245.1 N
|
critical level |
| 2 mm |
2613 Gs
261.3 mT
|
22.94 kg / 50.57 LBS
22939.0 g / 225.0 N
|
critical level |
| 3 mm |
2491 Gs
249.1 mT
|
20.84 kg / 45.95 LBS
20841.0 g / 204.4 N
|
critical level |
| 5 mm |
2232 Gs
223.2 mT
|
16.73 kg / 36.88 LBS
16730.5 g / 164.1 N
|
critical level |
| 10 mm |
1600 Gs
160.0 mT
|
8.60 kg / 18.96 LBS
8600.7 g / 84.4 N
|
warning |
| 15 mm |
1102 Gs
110.2 mT
|
4.08 kg / 9.00 LBS
4082.9 g / 40.1 N
|
warning |
| 20 mm |
757 Gs
75.7 mT
|
1.93 kg / 4.25 LBS
1925.7 g / 18.9 N
|
low risk |
| 30 mm |
376 Gs
37.6 mT
|
0.48 kg / 1.05 LBS
475.7 g / 4.7 N
|
low risk |
| 50 mm |
122 Gs
12.2 mT
|
0.05 kg / 0.11 LBS
49.9 g / 0.5 N
|
low risk |
Table 2: Sliding hold (vertical surface)
MPL 35x35x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
5.38 kg / 11.85 LBS
5376.0 g / 52.7 N
|
| 1 mm | Stal (~0.2) |
5.00 kg / 11.01 LBS
4996.0 g / 49.0 N
|
| 2 mm | Stal (~0.2) |
4.59 kg / 10.11 LBS
4588.0 g / 45.0 N
|
| 3 mm | Stal (~0.2) |
4.17 kg / 9.19 LBS
4168.0 g / 40.9 N
|
| 5 mm | Stal (~0.2) |
3.35 kg / 7.38 LBS
3346.0 g / 32.8 N
|
| 10 mm | Stal (~0.2) |
1.72 kg / 3.79 LBS
1720.0 g / 16.9 N
|
| 15 mm | Stal (~0.2) |
0.82 kg / 1.80 LBS
816.0 g / 8.0 N
|
| 20 mm | Stal (~0.2) |
0.39 kg / 0.85 LBS
386.0 g / 3.8 N
|
| 30 mm | Stal (~0.2) |
0.10 kg / 0.21 LBS
96.0 g / 0.9 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
Table 3: Wall mounting (shearing) - vertical pull
MPL 35x35x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
8.06 kg / 17.78 LBS
8064.0 g / 79.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
5.38 kg / 11.85 LBS
5376.0 g / 52.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.69 kg / 5.93 LBS
2688.0 g / 26.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
13.44 kg / 29.63 LBS
13440.0 g / 131.8 N
|
Table 4: Steel thickness (saturation) - power losses
MPL 35x35x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.34 kg / 2.96 LBS
1344.0 g / 13.2 N
|
| 1 mm |
|
3.36 kg / 7.41 LBS
3360.0 g / 33.0 N
|
| 2 mm |
|
6.72 kg / 14.82 LBS
6720.0 g / 65.9 N
|
| 3 mm |
|
10.08 kg / 22.22 LBS
10080.0 g / 98.9 N
|
| 5 mm |
|
16.80 kg / 37.04 LBS
16800.0 g / 164.8 N
|
| 10 mm |
|
26.88 kg / 59.26 LBS
26880.0 g / 263.7 N
|
| 11 mm |
|
26.88 kg / 59.26 LBS
26880.0 g / 263.7 N
|
| 12 mm |
|
26.88 kg / 59.26 LBS
26880.0 g / 263.7 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MPL 35x35x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
26.88 kg / 59.26 LBS
26880.0 g / 263.7 N
|
OK |
| 40 °C | -2.2% |
26.29 kg / 57.96 LBS
26288.6 g / 257.9 N
|
OK |
| 60 °C | -4.4% |
25.70 kg / 56.65 LBS
25697.3 g / 252.1 N
|
|
| 80 °C | -6.6% |
25.11 kg / 55.35 LBS
25105.9 g / 246.3 N
|
|
| 100 °C | -28.8% |
19.14 kg / 42.19 LBS
19138.6 g / 187.7 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 35x35x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
60.43 kg / 133.22 LBS
4 428 Gs
|
9.06 kg / 19.98 LBS
9064 g / 88.9 N
|
N/A |
| 1 mm |
58.36 kg / 128.67 LBS
5 560 Gs
|
8.75 kg / 19.30 LBS
8754 g / 85.9 N
|
52.53 kg / 115.80 LBS
~0 Gs
|
| 2 mm |
56.16 kg / 123.82 LBS
5 454 Gs
|
8.42 kg / 18.57 LBS
8424 g / 82.6 N
|
50.55 kg / 111.44 LBS
~0 Gs
|
| 3 mm |
53.89 kg / 118.81 LBS
5 343 Gs
|
8.08 kg / 17.82 LBS
8084 g / 79.3 N
|
48.50 kg / 106.93 LBS
~0 Gs
|
| 5 mm |
49.22 kg / 108.50 LBS
5 106 Gs
|
7.38 kg / 16.28 LBS
7382 g / 72.4 N
|
44.29 kg / 97.65 LBS
~0 Gs
|
| 10 mm |
37.61 kg / 82.92 LBS
4 463 Gs
|
5.64 kg / 12.44 LBS
5642 g / 55.3 N
|
33.85 kg / 74.63 LBS
~0 Gs
|
| 20 mm |
19.33 kg / 42.63 LBS
3 200 Gs
|
2.90 kg / 6.39 LBS
2900 g / 28.5 N
|
17.40 kg / 38.36 LBS
~0 Gs
|
| 50 mm |
2.10 kg / 4.64 LBS
1 056 Gs
|
0.32 kg / 0.70 LBS
316 g / 3.1 N
|
1.89 kg / 4.18 LBS
~0 Gs
|
| 60 mm |
1.07 kg / 2.36 LBS
753 Gs
|
0.16 kg / 0.35 LBS
160 g / 1.6 N
|
0.96 kg / 2.12 LBS
~0 Gs
|
| 70 mm |
0.57 kg / 1.26 LBS
550 Gs
|
0.09 kg / 0.19 LBS
86 g / 0.8 N
|
0.51 kg / 1.13 LBS
~0 Gs
|
| 80 mm |
0.32 kg / 0.70 LBS
411 Gs
|
0.05 kg / 0.11 LBS
48 g / 0.5 N
|
0.29 kg / 0.63 LBS
~0 Gs
|
| 90 mm |
0.19 kg / 0.41 LBS
313 Gs
|
0.03 kg / 0.06 LBS
28 g / 0.3 N
|
0.17 kg / 0.37 LBS
~0 Gs
|
| 100 mm |
0.11 kg / 0.25 LBS
244 Gs
|
0.02 kg / 0.04 LBS
17 g / 0.2 N
|
0.10 kg / 0.22 LBS
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MPL 35x35x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 16.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 13.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 10.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 8.0 cm |
| Car key | 50 Gs (5.0 mT) | 7.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MPL 35x35x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
20.41 km/h
(5.67 m/s)
|
1.48 J | |
| 30 mm |
30.21 km/h
(8.39 m/s)
|
3.23 J | |
| 50 mm |
38.62 km/h
(10.73 m/s)
|
5.29 J | |
| 100 mm |
54.55 km/h
(15.15 m/s)
|
10.55 J |
Table 9: Anti-corrosion coating durability
MPL 35x35x10 / 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 35x35x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 38 021 Mx | 380.2 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 35x35x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 26.88 kg | Standard |
| Water (riverbed) |
30.78 kg
(+3.90 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet retains just a fraction of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Temperature resistance
*For N38 grade, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35
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.
Material specification
| 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 |
Other proposals
Strengths as well as weaknesses of Nd2Fe14B magnets.
Strengths
- They retain full power for around 10 years – the loss is just ~1% (based on simulations),
- They do not lose their magnetic properties even under close interference source,
- By covering with a decorative layer of nickel, the element presents an proper look,
- They feature high magnetic induction at the operating surface, which affects their effectiveness,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Possibility of exact machining as well as optimizing to precise conditions,
- Significant place in future technologies – they serve a role in data components, electric drive systems, diagnostic systems, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in small systems
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also raises 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 power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in producing threads and complicated shapes in magnets, we recommend using a housing - magnetic holder.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these products can disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Pull force analysis
Maximum lifting force for a neodymium magnet – what affects it?
- using a plate made of high-permeability steel, serving as a magnetic yoke
- possessing a thickness of at least 10 mm to avoid saturation
- with a plane free of scratches
- under conditions of no distance (metal-to-metal)
- during detachment in a direction perpendicular to the plane
- at temperature room level
Key elements affecting lifting force
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Plate thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be escaped to the other side.
- Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
- Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
- Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the lifting capacity.
Warnings
Keep away from children
Neodymium magnets are not suitable for play. Eating multiple magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.
Heat warning
Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.
Serious injuries
Pinching hazard: The attraction force is so immense that it can result in hematomas, pinching, and broken bones. Use thick gloves.
Medical implants
Warning for patients: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Protect data
Very strong magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.
Immense force
Use magnets with awareness. Their huge power can shock even professionals. Plan your moves and do not underestimate their force.
Machining danger
Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Precision electronics
Navigation devices and mobile phones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.
Skin irritation risks
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and select coated magnets.
Beware of splinters
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them breaking into small pieces.
