MPL 5x4x1 / N38 - lamellar magnet
lamellar magnet
Catalog no 020169
GTIN/EAN: 5906301811756
length
5 mm [±0,1 mm]
Width
4 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.15 g
Magnetization Direction
↑ axial
Load capacity
0.32 kg / 3.16 N
Magnetic Induction
232.88 mT / 2329 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical parameters - MPL 5x4x1 / N38 - lamellar magnet
Specification / characteristics - MPL 5x4x1 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020169 |
| GTIN/EAN | 5906301811756 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 5 mm [±0,1 mm] |
| Width | 4 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.15 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.32 kg / 3.16 N |
| Magnetic Induction ~ ? | 232.88 mT / 2329 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 magnet - report
The following data are the direct effect of a mathematical analysis. Results are based on algorithms for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Use these calculations as a supplementary guide for designers.
Table 1: Static force (force vs distance) - interaction chart
MPL 5x4x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2327 Gs
232.7 mT
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
safe |
| 1 mm |
1559 Gs
155.9 mT
|
0.14 kg / 0.32 pounds
143.7 g / 1.4 N
|
safe |
| 2 mm |
876 Gs
87.6 mT
|
0.05 kg / 0.10 pounds
45.3 g / 0.4 N
|
safe |
| 3 mm |
488 Gs
48.8 mT
|
0.01 kg / 0.03 pounds
14.1 g / 0.1 N
|
safe |
| 5 mm |
177 Gs
17.7 mT
|
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
|
safe |
| 10 mm |
31 Gs
3.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 15 mm |
10 Gs
1.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 20 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 30 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Shear load (vertical surface)
MPL 5x4x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.06 kg / 0.14 pounds
64.0 g / 0.6 N
|
| 1 mm | Stal (~0.2) |
0.03 kg / 0.06 pounds
28.0 g / 0.3 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 5x4x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.10 kg / 0.21 pounds
96.0 g / 0.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.06 kg / 0.14 pounds
64.0 g / 0.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.16 kg / 0.35 pounds
160.0 g / 1.6 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 5x4x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
|
| 1 mm |
|
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
|
| 2 mm |
|
0.16 kg / 0.35 pounds
160.0 g / 1.6 N
|
| 3 mm |
|
0.24 kg / 0.53 pounds
240.0 g / 2.4 N
|
| 5 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 10 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 11 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 12 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 5x4x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
OK |
| 40 °C | -2.2% |
0.31 kg / 0.69 pounds
313.0 g / 3.1 N
|
OK |
| 60 °C | -4.4% |
0.31 kg / 0.67 pounds
305.9 g / 3.0 N
|
|
| 80 °C | -6.6% |
0.30 kg / 0.66 pounds
298.9 g / 2.9 N
|
|
| 100 °C | -28.8% |
0.23 kg / 0.50 pounds
227.8 g / 2.2 N
|
Table 6: Two magnets (attraction) - field collision
MPL 5x4x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.67 kg / 1.47 pounds
3 878 Gs
|
0.10 kg / 0.22 pounds
100 g / 1.0 N
|
N/A |
| 1 mm |
0.48 kg / 1.06 pounds
3 959 Gs
|
0.07 kg / 0.16 pounds
72 g / 0.7 N
|
0.43 kg / 0.96 pounds
~0 Gs
|
| 2 mm |
0.30 kg / 0.66 pounds
3 118 Gs
|
0.04 kg / 0.10 pounds
45 g / 0.4 N
|
0.27 kg / 0.59 pounds
~0 Gs
|
| 3 mm |
0.17 kg / 0.38 pounds
2 356 Gs
|
0.03 kg / 0.06 pounds
26 g / 0.3 N
|
0.15 kg / 0.34 pounds
~0 Gs
|
| 5 mm |
0.05 kg / 0.12 pounds
1 302 Gs
|
0.01 kg / 0.02 pounds
8 g / 0.1 N
|
0.05 kg / 0.10 pounds
~0 Gs
|
| 10 mm |
0.00 kg / 0.01 pounds
355 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
63 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
5 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
1 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
1 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
1 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) - warnings
MPL 5x4x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.0 cm |
| Remote | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MPL 5x4x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
46.59 km/h
(12.94 m/s)
|
0.01 J | |
| 30 mm |
80.68 km/h
(22.41 m/s)
|
0.04 J | |
| 50 mm |
104.16 km/h
(28.93 m/s)
|
0.06 J | |
| 100 mm |
147.30 km/h
(40.92 m/s)
|
0.13 J |
Table 9: Surface protection spec
MPL 5x4x1 / 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 5x4x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 531 Mx | 5.3 µWb |
| Pc Coefficient | 0.29 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 5x4x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.32 kg | Standard |
| Water (riverbed) |
0.37 kg
(+0.05 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Heat tolerance
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.29
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out also offers
Pros as well as cons of neodymium magnets.
Advantages
- They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
- Magnets very well protect themselves against loss of magnetization caused by external fields,
- By using a reflective layer of silver, the element presents an professional look,
- Magnets possess huge magnetic induction on the outer side,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Thanks to versatility in designing and the ability to modify to client solutions,
- Significant place in modern technologies – they find application in hard drives, electromotive mechanisms, medical devices, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in compact constructions
Limitations
- At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets decrease their strength 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 stability even at temperatures up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
- We suggest a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
- Due to neodymium price, their price exceeds standard values,
Lifting parameters
Highest magnetic holding force – what it depends on?
- with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- under conditions of no distance (surface-to-surface)
- under axial force direction (90-degree angle)
- at temperature room level
Practical aspects of lifting capacity – factors
- Gap (betwixt the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Chemical composition of the base – mild steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
- Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Do not drill into magnets
Combustion risk: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.
Choking Hazard
These products are not suitable for play. Eating a few magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.
Impact on smartphones
Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a separation from your phone, device, and GPS.
Operating temperature
Keep cool. Neodymium magnets are sensitive to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).
Nickel allergy
Some people suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in skin redness. It is best to use protective gloves.
Handling rules
Be careful. Neodymium magnets act from a distance and connect with huge force, often quicker than you can react.
Magnets are brittle
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Bone fractures
Watch your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!
Implant safety
For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.
Cards and drives
Avoid bringing magnets near a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.
