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 of the product - 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 analysis of the assembly - data
The following values are the outcome of a physical analysis. Values rely on models for the class Nd2Fe14B. Operational performance might slightly differ. Use these calculations as a supplementary guide when designing systems.
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 lbs
320.0 g / 3.1 N
|
safe |
| 1 mm |
1559 Gs
155.9 mT
|
0.14 kg / 0.32 lbs
143.7 g / 1.4 N
|
safe |
| 2 mm |
876 Gs
87.6 mT
|
0.05 kg / 0.10 lbs
45.3 g / 0.4 N
|
safe |
| 3 mm |
488 Gs
48.8 mT
|
0.01 kg / 0.03 lbs
14.1 g / 0.1 N
|
safe |
| 5 mm |
177 Gs
17.7 mT
|
0.00 kg / 0.00 lbs
1.9 g / 0.0 N
|
safe |
| 10 mm |
31 Gs
3.1 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
| 15 mm |
10 Gs
1.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 20 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 30 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Sliding hold (wall)
MPL 5x4x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.06 kg / 0.14 lbs
64.0 g / 0.6 N
|
| 1 mm | Stal (~0.2) |
0.03 kg / 0.06 lbs
28.0 g / 0.3 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
10.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - 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 lbs
96.0 g / 0.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.06 kg / 0.14 lbs
64.0 g / 0.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.16 kg / 0.35 lbs
160.0 g / 1.6 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 5x4x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
|
| 1 mm |
|
0.08 kg / 0.18 lbs
80.0 g / 0.8 N
|
| 2 mm |
|
0.16 kg / 0.35 lbs
160.0 g / 1.6 N
|
| 3 mm |
|
0.24 kg / 0.53 lbs
240.0 g / 2.4 N
|
| 5 mm |
|
0.32 kg / 0.71 lbs
320.0 g / 3.1 N
|
| 10 mm |
|
0.32 kg / 0.71 lbs
320.0 g / 3.1 N
|
| 11 mm |
|
0.32 kg / 0.71 lbs
320.0 g / 3.1 N
|
| 12 mm |
|
0.32 kg / 0.71 lbs
320.0 g / 3.1 N
|
Table 5: Working in heat (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 lbs
320.0 g / 3.1 N
|
OK |
| 40 °C | -2.2% |
0.31 kg / 0.69 lbs
313.0 g / 3.1 N
|
OK |
| 60 °C | -4.4% |
0.31 kg / 0.67 lbs
305.9 g / 3.0 N
|
|
| 80 °C | -6.6% |
0.30 kg / 0.66 lbs
298.9 g / 2.9 N
|
|
| 100 °C | -28.8% |
0.23 kg / 0.50 lbs
227.8 g / 2.2 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 5x4x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.67 kg / 1.47 lbs
3 878 Gs
|
0.10 kg / 0.22 lbs
100 g / 1.0 N
|
N/A |
| 1 mm |
0.48 kg / 1.06 lbs
3 959 Gs
|
0.07 kg / 0.16 lbs
72 g / 0.7 N
|
0.43 kg / 0.96 lbs
~0 Gs
|
| 2 mm |
0.30 kg / 0.66 lbs
3 118 Gs
|
0.04 kg / 0.10 lbs
45 g / 0.4 N
|
0.27 kg / 0.59 lbs
~0 Gs
|
| 3 mm |
0.17 kg / 0.38 lbs
2 356 Gs
|
0.03 kg / 0.06 lbs
26 g / 0.3 N
|
0.15 kg / 0.34 lbs
~0 Gs
|
| 5 mm |
0.05 kg / 0.12 lbs
1 302 Gs
|
0.01 kg / 0.02 lbs
8 g / 0.1 N
|
0.05 kg / 0.10 lbs
~0 Gs
|
| 10 mm |
0.00 kg / 0.01 lbs
355 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 lbs
63 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
5 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 lbs
3 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 lbs
2 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 lbs
1 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 lbs
1 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
1 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
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 |
| Timepiece | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 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: Dynamics (cracking risk) - 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: Coating parameters (durability)
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: Construction data (Flux)
MPL 5x4x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 531 Mx | 5.3 µWb |
| Pc Coefficient | 0.29 | Low (Flat) |
Table 11: Submerged application
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)
*Note: On a vertical surface, the magnet retains just ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely limits the holding force.
3. Thermal stability
*For standard magnets, the safety limit 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.
Chemical composition
| 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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Pros as well as cons of neodymium magnets.
Pros
- Their power is durable, and after approximately 10 years it drops only by ~1% (theoretically),
- Magnets perfectly defend themselves against demagnetization caused by external fields,
- By applying a reflective layer of nickel, the element gains an modern look,
- Magnets have excellent magnetic induction on the outer side,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Considering the possibility of free molding and adaptation to custom solutions, neodymium magnets can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
- Universal use in modern technologies – they are commonly used in hard drives, brushless drives, advanced medical instruments, as well as multitasking production systems.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Weaknesses
- To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in producing nuts and complicated forms in magnets, we recommend using a housing - magnetic holder.
- Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can disrupt the diagnostic process medical when they are in the body.
- Due to complex production process, their price is higher than average,
Lifting parameters
Best holding force of the magnet in ideal parameters – what affects it?
- using a base made of low-carbon steel, functioning as a ideal flux conductor
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- without any clearance between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- in stable room temperature
Practical lifting capacity: influencing factors
- Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Base massiveness – insufficiently thick steel causes magnetic saturation, causing part of the power to be escaped into the air.
- Material composition – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
- Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the holding force.
Warnings
GPS Danger
A powerful magnetic field interferes with the operation of magnetometers in phones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.
Conscious usage
Exercise caution. Rare earth magnets act from a distance and connect with huge force, often faster than you can move away.
Fragile material
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.
Maximum temperature
Do not overheat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).
Warning for heart patients
For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Keep away from computers
Avoid bringing magnets near a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.
Allergy Warning
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease handling magnets and wear gloves.
Do not drill into magnets
Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Keep away from children
Adult use only. Small elements can be swallowed, leading to severe trauma. Store out of reach of kids and pets.
Physical harm
Large magnets can smash fingers instantly. Under no circumstances place your hand between two strong magnets.
