MPL 30x10x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020138
GTIN/EAN: 5906301811442
- length
- 30 mm [±0,1 mm]
- Width
- 10 mm [±0,1 mm]
- Height
- 5 mm [±0,1 mm]
- Weight
- 11.25 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
3.46 zł net / pcs
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Need more?Frequently asked questions
How much will a block magnet really hold?
What is the maximum working temperature?
What safety factor should I allow?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Technical data of the product - MPL 30x10x5 / N38 - lamellar magnet
Specification / characteristics - MPL 30x10x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020138 |
| GTIN/EAN | 5906301811442 |
| 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 | 5 mm [±0,1 mm] |
| Weight | 11.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 8.89 kg / 87.23 N |
| Magnetic Induction ~ ? | 329.52 mT / 3295 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 |
Physical analysis of the product - technical parameters
Presented information are the result of a mathematical calculation. Results are based on algorithms for the material Nd2Fe14B. Real-world conditions may differ. Treat these calculations as a reference point when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
MPL 30x10x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3294 Gs
329.4 mT
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
warning |
| 1 mm |
2866 Gs
286.6 mT
|
6.73 kg / 14.84 pounds
6731.1 g / 66.0 N
|
warning |
| 2 mm |
2424 Gs
242.4 mT
|
4.82 kg / 10.62 pounds
4816.4 g / 47.2 N
|
warning |
| 3 mm |
2022 Gs
202.2 mT
|
3.35 kg / 7.38 pounds
3349.6 g / 32.9 N
|
warning |
| 5 mm |
1397 Gs
139.7 mT
|
1.60 kg / 3.53 pounds
1600.3 g / 15.7 N
|
safe |
| 10 mm |
615 Gs
61.5 mT
|
0.31 kg / 0.68 pounds
309.8 g / 3.0 N
|
safe |
| 15 mm |
314 Gs
31.4 mT
|
0.08 kg / 0.18 pounds
80.6 g / 0.8 N
|
safe |
| 20 mm |
177 Gs
17.7 mT
|
0.03 kg / 0.06 pounds
25.8 g / 0.3 N
|
safe |
| 30 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
safe |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
safe |
Table 2: Shear force (vertical surface)
MPL 30x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
|
| 1 mm | Stal (~0.2) |
1.35 kg / 2.97 pounds
1346.0 g / 13.2 N
|
| 2 mm | Stal (~0.2) |
0.96 kg / 2.13 pounds
964.0 g / 9.5 N
|
| 3 mm | Stal (~0.2) |
0.67 kg / 1.48 pounds
670.0 g / 6.6 N
|
| 5 mm | Stal (~0.2) |
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 10 mm | Stal (~0.2) |
0.06 kg / 0.14 pounds
62.0 g / 0.6 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
16.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 30x10x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.67 kg / 5.88 pounds
2667.0 g / 26.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.78 kg / 3.92 pounds
1778.0 g / 17.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x10x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.89 kg / 1.96 pounds
889.0 g / 8.7 N
|
| 1 mm |
|
2.22 kg / 4.90 pounds
2222.5 g / 21.8 N
|
| 2 mm |
|
4.45 kg / 9.80 pounds
4445.0 g / 43.6 N
|
| 3 mm |
|
6.67 kg / 14.70 pounds
6667.5 g / 65.4 N
|
| 5 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 10 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 11 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
| 12 mm |
|
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
Table 5: Thermal resistance (material behavior) - power drop
MPL 30x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
8.89 kg / 19.60 pounds
8890.0 g / 87.2 N
|
OK |
| 40 °C | -2.2% |
8.69 kg / 19.17 pounds
8694.4 g / 85.3 N
|
OK |
| 60 °C | -4.4% |
8.50 kg / 18.74 pounds
8498.8 g / 83.4 N
|
|
| 80 °C | -6.6% |
8.30 kg / 18.31 pounds
8303.3 g / 81.5 N
|
|
| 100 °C | -28.8% |
6.33 kg / 13.95 pounds
6329.7 g / 62.1 N
|
Table 6: Two magnets (repulsion) - field range
MPL 30x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
20.06 kg / 44.23 pounds
4 689 Gs
|
3.01 kg / 6.63 pounds
3010 g / 29.5 N
|
N/A |
| 1 mm |
17.63 kg / 38.86 pounds
6 174 Gs
|
2.64 kg / 5.83 pounds
2644 g / 25.9 N
|
15.86 kg / 34.98 pounds
~0 Gs
|
| 2 mm |
15.19 kg / 33.49 pounds
5 732 Gs
|
2.28 kg / 5.02 pounds
2279 g / 22.4 N
|
13.67 kg / 30.14 pounds
~0 Gs
|
| 3 mm |
12.92 kg / 28.47 pounds
5 285 Gs
|
1.94 kg / 4.27 pounds
1937 g / 19.0 N
|
11.62 kg / 25.63 pounds
~0 Gs
|
| 5 mm |
9.08 kg / 20.03 pounds
4 432 Gs
|
1.36 kg / 3.00 pounds
1363 g / 13.4 N
|
8.18 kg / 18.02 pounds
~0 Gs
|
| 10 mm |
3.61 kg / 7.96 pounds
2 795 Gs
|
0.54 kg / 1.19 pounds
542 g / 5.3 N
|
3.25 kg / 7.17 pounds
~0 Gs
|
| 20 mm |
0.70 kg / 1.54 pounds
1 230 Gs
|
0.10 kg / 0.23 pounds
105 g / 1.0 N
|
0.63 kg / 1.39 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.05 pounds
217 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 pounds
141 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
96 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
68 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
50 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
38 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
MPL 30x10x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 5.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x10x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.33 km/h
(6.76 m/s)
|
0.26 J | |
| 30 mm |
24.87 km/h
(6.91 m/s)
|
0.27 J | |
| 50 mm |
24.88 km/h
(6.91 m/s)
|
0.27 J | |
| 100 mm |
24.88 km/h
(6.91 m/s)
|
0.27 J |
Table 9: Surface protection spec
MPL 30x10x5 / 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 30x10x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 9 370 Mx | 93.7 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Submerged application
MPL 30x10x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 8.89 kg | Standard |
| Water (riverbed) |
10.18 kg
(+1.29 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Heat tolerance
*For N38 material, 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
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 |
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Strengths as well as weaknesses of Nd2Fe14B magnets.
Benefits
- They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
- Neodymium magnets are distinguished by highly resistant to magnetic field loss caused by external interference,
- In other words, due to the reflective finish of gold, the element becomes visually attractive,
- Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to versatility in forming and the capacity to adapt to unusual requirements,
- Significant place in future technologies – they are commonly used in mass storage devices, brushless drives, advanced medical instruments, also other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Limited possibility of making threads in the magnet and complex shapes - recommended is casing - magnet mounting.
- Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets is a challenge,
Holding force characteristics
Maximum holding power of the magnet – what affects it?
- on a base made of mild steel, perfectly concentrating the magnetic field
- with a thickness no less than 10 mm
- with an ground contact surface
- with direct contact (without paint)
- under perpendicular force direction (90-degree angle)
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Distance (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Compass and GPS
A powerful magnetic field negatively affects the functioning of magnetometers in phones and navigation systems. Keep magnets near a device to prevent breaking the sensors.
Skin irritation risks
Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for coated magnets.
Health Danger
Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Mechanical processing
Powder generated during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Shattering risk
Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Eye protection is mandatory.
Electronic devices
Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Operating temperature
Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.
Physical harm
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.
Do not give to children
Strictly store magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.
Powerful field
Use magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.
