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
bulk discounts:
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Product card - 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 |
Engineering modeling of the magnet - technical parameters
These data constitute the outcome of a mathematical simulation. Values were calculated on models for the material Nd2Fe14B. Real-world performance may differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs gap) - 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
|
safe |
| 30 mm |
376 Gs
37.6 mT
|
0.48 kg / 1.05 LBS
475.7 g / 4.7 N
|
safe |
| 50 mm |
122 Gs
12.2 mT
|
0.05 kg / 0.11 LBS
49.9 g / 0.5 N
|
safe |
Table 2: Sliding force (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: Vertical assembly (shearing) - behavior on slippery surfaces
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 (substrate influence) - sheet metal selection
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: Working in heat (stability) - resistance threshold
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: Two magnets (attraction) - field range
MPL 35x35x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Safety (HSE) (electronics) - precautionary measures
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 |
| Mobile device | 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: Impact energy (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: Physics of underwater searching
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. Sliding resistance
*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) significantly reduces 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) = 0.35
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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- They do not lose their magnetic properties even under close interference source,
- By applying a lustrous layer of silver, the element has an nice 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...
- Thanks to freedom in forming and the ability to customize to unusual requirements,
- Wide application in high-tech industry – they find application in data components, brushless drives, precision medical tools, and industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- Neodymium magnets lose their force 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 when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of making nuts in the magnet and complicated shapes - preferred is a housing - magnet mounting.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets is economically unviable,
Pull force analysis
Detachment force of the magnet in optimal conditions – what it depends on?
- using a sheet made of high-permeability steel, functioning as a ideal flux conductor
- whose transverse dimension is min. 10 mm
- with an polished contact surface
- without any insulating layer between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Lifting capacity in practice – influencing factors
- Distance (between the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
- Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Warnings
Medical interference
Patients with a pacemaker must maintain an safe separation from magnets. The magnetism can stop the operation of the implant.
Swallowing risk
These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.
Warning for allergy sufferers
Certain individuals experience a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Extended handling might lead to dermatitis. We recommend wear protective gloves.
Data carriers
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).
Fragile material
Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Handling rules
Handle with care. Neodymium magnets act from a long distance and connect with massive power, often faster than you can move away.
Dust is flammable
Powder produced during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Operating temperature
Monitor thermal conditions. Heating the magnet to high heat will destroy its magnetic structure and strength.
Bodily injuries
Large magnets can break fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.
Magnetic interference
Note: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your phone, tablet, and GPS.
