MPL 30x10x8 / N38 - lamellar magnet
lamellar magnet
Catalog no 020139
GTIN/EAN: 5906301811459
length
30 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
18 g
Magnetization Direction
↑ axial
Load capacity
12.13 kg / 119.04 N
Magnetic Induction
427.56 mT / 4276 Gs
Coating
[NiCuNi] Nickel
10.71 ZŁ with VAT / pcs + price for transport
8.71 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 888 99 98 98
otherwise drop us a message using
form
the contact section.
Strength and appearance of a neodymium magnet can be verified using our
force calculator.
Same-day processing for orders placed before 14:00.
Technical specification of the product - MPL 30x10x8 / N38 - lamellar magnet
Specification / characteristics - MPL 30x10x8 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020139 |
| GTIN/EAN | 5906301811459 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 8 mm [±0,1 mm] |
| Weight | 18 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 12.13 kg / 119.04 N |
| Magnetic Induction ~ ? | 427.56 mT / 4276 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 product - data
The following data represent the direct effect of a physical calculation. Values are based on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ. Treat these data as a supplementary guide during assembly planning.
Table 1: Static force (pull vs distance) - characteristics
MPL 30x10x8 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4273 Gs
427.3 mT
|
12.13 kg / 26.74 LBS
12130.0 g / 119.0 N
|
crushing |
| 1 mm |
3683 Gs
368.3 mT
|
9.01 kg / 19.86 LBS
9009.7 g / 88.4 N
|
medium risk |
| 2 mm |
3109 Gs
310.9 mT
|
6.42 kg / 14.15 LBS
6419.9 g / 63.0 N
|
medium risk |
| 3 mm |
2600 Gs
260.0 mT
|
4.49 kg / 9.90 LBS
4488.7 g / 44.0 N
|
medium risk |
| 5 mm |
1818 Gs
181.8 mT
|
2.20 kg / 4.84 LBS
2195.3 g / 21.5 N
|
medium risk |
| 10 mm |
825 Gs
82.5 mT
|
0.45 kg / 1.00 LBS
452.4 g / 4.4 N
|
safe |
| 15 mm |
431 Gs
43.1 mT
|
0.12 kg / 0.27 LBS
123.4 g / 1.2 N
|
safe |
| 20 mm |
248 Gs
24.8 mT
|
0.04 kg / 0.09 LBS
41.0 g / 0.4 N
|
safe |
| 30 mm |
101 Gs
10.1 mT
|
0.01 kg / 0.02 LBS
6.8 g / 0.1 N
|
safe |
| 50 mm |
28 Gs
2.8 mT
|
0.00 kg / 0.00 LBS
0.5 g / 0.0 N
|
safe |
Table 2: Sliding force (wall)
MPL 30x10x8 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.43 kg / 5.35 LBS
2426.0 g / 23.8 N
|
| 1 mm | Stal (~0.2) |
1.80 kg / 3.97 LBS
1802.0 g / 17.7 N
|
| 2 mm | Stal (~0.2) |
1.28 kg / 2.83 LBS
1284.0 g / 12.6 N
|
| 3 mm | Stal (~0.2) |
0.90 kg / 1.98 LBS
898.0 g / 8.8 N
|
| 5 mm | Stal (~0.2) |
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 10 mm | Stal (~0.2) |
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
24.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 30x10x8 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
3.64 kg / 8.02 LBS
3639.0 g / 35.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.43 kg / 5.35 LBS
2426.0 g / 23.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.21 kg / 2.67 LBS
1213.0 g / 11.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
6.07 kg / 13.37 LBS
6065.0 g / 59.5 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 30x10x8 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.61 kg / 1.34 LBS
606.5 g / 5.9 N
|
| 1 mm |
|
1.52 kg / 3.34 LBS
1516.3 g / 14.9 N
|
| 2 mm |
|
3.03 kg / 6.69 LBS
3032.5 g / 29.7 N
|
| 3 mm |
|
4.55 kg / 10.03 LBS
4548.8 g / 44.6 N
|
| 5 mm |
|
7.58 kg / 16.71 LBS
7581.3 g / 74.4 N
|
| 10 mm |
|
12.13 kg / 26.74 LBS
12130.0 g / 119.0 N
|
| 11 mm |
|
12.13 kg / 26.74 LBS
12130.0 g / 119.0 N
|
| 12 mm |
|
12.13 kg / 26.74 LBS
12130.0 g / 119.0 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 30x10x8 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
12.13 kg / 26.74 LBS
12130.0 g / 119.0 N
|
OK |
| 40 °C | -2.2% |
11.86 kg / 26.15 LBS
11863.1 g / 116.4 N
|
OK |
| 60 °C | -4.4% |
11.60 kg / 25.57 LBS
11596.3 g / 113.8 N
|
|
| 80 °C | -6.6% |
11.33 kg / 24.98 LBS
11329.4 g / 111.1 N
|
|
| 100 °C | -28.8% |
8.64 kg / 19.04 LBS
8636.6 g / 84.7 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 30x10x8 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
33.78 kg / 74.46 LBS
5 382 Gs
|
5.07 kg / 11.17 LBS
5066 g / 49.7 N
|
N/A |
| 1 mm |
29.33 kg / 64.66 LBS
7 964 Gs
|
4.40 kg / 9.70 LBS
4399 g / 43.2 N
|
26.39 kg / 58.19 LBS
~0 Gs
|
| 2 mm |
25.09 kg / 55.31 LBS
7 366 Gs
|
3.76 kg / 8.30 LBS
3763 g / 36.9 N
|
22.58 kg / 49.78 LBS
~0 Gs
|
| 3 mm |
21.25 kg / 46.85 LBS
6 780 Gs
|
3.19 kg / 7.03 LBS
3188 g / 31.3 N
|
19.13 kg / 42.17 LBS
~0 Gs
|
| 5 mm |
14.97 kg / 32.99 LBS
5 689 Gs
|
2.24 kg / 4.95 LBS
2245 g / 22.0 N
|
13.47 kg / 29.70 LBS
~0 Gs
|
| 10 mm |
6.11 kg / 13.48 LBS
3 636 Gs
|
0.92 kg / 2.02 LBS
917 g / 9.0 N
|
5.50 kg / 12.13 LBS
~0 Gs
|
| 20 mm |
1.26 kg / 2.78 LBS
1 651 Gs
|
0.19 kg / 0.42 LBS
189 g / 1.9 N
|
1.13 kg / 2.50 LBS
~0 Gs
|
| 50 mm |
0.04 kg / 0.10 LBS
308 Gs
|
0.01 kg / 0.01 LBS
7 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
| 60 mm |
0.02 kg / 0.04 LBS
203 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 70 mm |
0.01 kg / 0.02 LBS
140 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.01 LBS
100 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 LBS
74 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
56 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MPL 30x10x8 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 6.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Remote | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (kinetic energy) - warning
MPL 30x10x8 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.78 km/h
(7.44 m/s)
|
0.50 J | |
| 30 mm |
45.36 km/h
(12.60 m/s)
|
1.43 J | |
| 50 mm |
58.54 km/h
(16.26 m/s)
|
2.38 J | |
| 100 mm |
82.79 km/h
(23.00 m/s)
|
4.76 J |
Table 9: Surface protection spec
MPL 30x10x8 / 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 30x10x8 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 12 138 Mx | 121.4 µWb |
| Pc Coefficient | 0.51 | Low (Flat) |
Table 11: Submerged application
MPL 30x10x8 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 12.13 kg | Standard |
| Water (riverbed) |
13.89 kg
(+1.76 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly reduces the holding force.
3. Thermal stability
*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) = 0.51
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Strengths and weaknesses of rare earth magnets.
Pros
- They retain attractive force for nearly 10 years – the loss is just ~1% (based on simulations),
- They have excellent resistance to magnetism drop when exposed to external magnetic sources,
- Thanks to the smooth finish, the coating of nickel, gold-plated, or silver-plated gives an professional appearance,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- 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 shaping and the ability to modify to client solutions,
- Fundamental importance in advanced technology sectors – they are utilized in hard drives, electromotive mechanisms, precision medical tools, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in miniature devices
Cons
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets experience 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 usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- We recommend cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated shapes.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Maximum lifting force for a neodymium magnet – what affects it?
- with the contact of a sheet made of special test steel, ensuring maximum field concentration
- possessing a thickness of minimum 10 mm to ensure full flux closure
- characterized by lack of roughness
- under conditions of gap-free contact (surface-to-surface)
- under axial application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
- Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be escaped into the air.
- Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
- Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- 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).
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the holding force.
Warnings
Eye protection
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Precision electronics
Be aware: neodymium magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your phone, device, and GPS.
Metal Allergy
Studies show that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands or opt for versions in plastic housing.
Implant safety
People with a heart stimulator should maintain an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.
Powerful field
Be careful. Rare earth magnets act from a long distance and connect with massive power, often faster than you can react.
Electronic hazard
Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Pinching danger
Large magnets can smash fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.
Operating temperature
Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).
Mechanical processing
Powder generated during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Product not for children
Absolutely keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are fatal.
