MPL 3x3x1 / N38 - lamellar magnet
lamellar magnet
Catalog no 020146
GTIN/EAN: 5906301811527
length
3 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.07 g
Magnetization Direction
↑ axial
Load capacity
0.23 kg / 2.29 N
Magnetic Induction
317.31 mT / 3173 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
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Product card - MPL 3x3x1 / N38 - lamellar magnet
Specification / characteristics - MPL 3x3x1 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020146 |
| GTIN/EAN | 5906301811527 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 3 mm [±0,1 mm] |
| Width | 3 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.07 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.23 kg / 2.29 N |
| Magnetic Induction ~ ? | 317.31 mT / 3173 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 - data
These information represent the result of a mathematical analysis. Values were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (force vs gap) - interaction chart
MPL 3x3x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3168 Gs
316.8 mT
|
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
safe |
| 1 mm |
1565 Gs
156.5 mT
|
0.06 kg / 0.12 pounds
56.1 g / 0.6 N
|
safe |
| 2 mm |
659 Gs
65.9 mT
|
0.01 kg / 0.02 pounds
9.9 g / 0.1 N
|
safe |
| 3 mm |
307 Gs
30.7 mT
|
0.00 kg / 0.00 pounds
2.2 g / 0.0 N
|
safe |
| 5 mm |
94 Gs
9.4 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
safe |
| 10 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 15 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 20 mm |
2 Gs
0.2 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: Vertical hold (wall)
MPL 3x3x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
12.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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: Wall mounting (shearing) - vertical pull
MPL 3x3x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.07 kg / 0.15 pounds
69.0 g / 0.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.02 kg / 0.05 pounds
23.0 g / 0.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.12 kg / 0.25 pounds
115.0 g / 1.1 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 3x3x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.02 kg / 0.05 pounds
23.0 g / 0.2 N
|
| 1 mm |
|
0.06 kg / 0.13 pounds
57.5 g / 0.6 N
|
| 2 mm |
|
0.12 kg / 0.25 pounds
115.0 g / 1.1 N
|
| 3 mm |
|
0.17 kg / 0.38 pounds
172.5 g / 1.7 N
|
| 5 mm |
|
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
| 10 mm |
|
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
| 11 mm |
|
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
| 12 mm |
|
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
Table 5: Working in heat (stability) - power drop
MPL 3x3x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
|
OK |
| 40 °C | -2.2% |
0.22 kg / 0.50 pounds
224.9 g / 2.2 N
|
OK |
| 60 °C | -4.4% |
0.22 kg / 0.48 pounds
219.9 g / 2.2 N
|
|
| 80 °C | -6.6% |
0.21 kg / 0.47 pounds
214.8 g / 2.1 N
|
|
| 100 °C | -28.8% |
0.16 kg / 0.36 pounds
163.8 g / 1.6 N
|
Table 6: Two magnets (attraction) - field collision
MPL 3x3x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.56 kg / 1.23 pounds
4 719 Gs
|
0.08 kg / 0.18 pounds
84 g / 0.8 N
|
N/A |
| 1 mm |
0.31 kg / 0.68 pounds
4 706 Gs
|
0.05 kg / 0.10 pounds
46 g / 0.5 N
|
0.28 kg / 0.61 pounds
~0 Gs
|
| 2 mm |
0.14 kg / 0.30 pounds
3 129 Gs
|
0.02 kg / 0.04 pounds
20 g / 0.2 N
|
0.12 kg / 0.27 pounds
~0 Gs
|
| 3 mm |
0.06 kg / 0.12 pounds
2 019 Gs
|
0.01 kg / 0.02 pounds
8 g / 0.1 N
|
0.05 kg / 0.11 pounds
~0 Gs
|
| 5 mm |
0.01 kg / 0.02 pounds
885 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 pounds
188 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
30 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
2 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
1 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
1 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
0 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
0 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 3x3x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 1.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 1.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.0 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: Impact energy (cracking risk) - collision effects
MPL 3x3x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
57.81 km/h
(16.06 m/s)
|
0.01 J | |
| 30 mm |
100.13 km/h
(27.81 m/s)
|
0.03 J | |
| 50 mm |
129.27 km/h
(35.91 m/s)
|
0.05 J | |
| 100 mm |
182.81 km/h
(50.78 m/s)
|
0.09 J |
Table 9: Anti-corrosion coating durability
MPL 3x3x1 / 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 3x3x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 306 Mx | 3.1 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Submerged application
MPL 3x3x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.23 kg | Standard |
| Water (riverbed) |
0.26 kg
(+0.03 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet retains just a fraction of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically weakens 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) = 0.40
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.
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 |
Other offers
Strengths as well as weaknesses of neodymium magnets.
Advantages
- They do not lose strength, even over approximately ten years – the decrease in power is only ~1% (according to tests),
- Neodymium magnets are distinguished by exceptionally resistant to demagnetization caused by external field sources,
- A magnet with a shiny silver surface has an effective appearance,
- Magnets are distinguished by excellent magnetic induction on the surface,
- 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...
- Due to the possibility of precise forming and customization to individualized solutions, neodymium magnets can be modeled in a wide range of geometric configurations, which amplifies use scope,
- Wide application in modern technologies – they are commonly used in computer drives, electric motors, medical devices, and technologically advanced constructions.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We recommend a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
- Possible danger to health – tiny shards 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 can complicate diagnosis medical in case of swallowing.
- With budget limitations the cost of neodymium magnets is a challenge,
Pull force analysis
Detachment force of the magnet in optimal conditions – what contributes to it?
- with the use of a sheet made of low-carbon steel, ensuring maximum field concentration
- whose thickness is min. 10 mm
- with a surface free of scratches
- without the slightest air gap between the magnet and steel
- during detachment in a direction vertical to the mounting surface
- at temperature room level
Determinants of lifting force in real conditions
- Distance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
- Angle of force application – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Material composition – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
- Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the holding force.
Warnings
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and wear gloves.
Handling rules
Handle magnets consciously. Their huge power can shock even professionals. Plan your moves and respect their power.
Protect data
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, timepieces).
Dust is flammable
Drilling and cutting of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Fragile material
NdFeB magnets are ceramic materials, meaning they are prone to chipping. Clashing of two magnets will cause them breaking into small pieces.
Compass and GPS
Note: neodymium magnets generate a field that interferes with precision electronics. Keep a safe distance from your phone, device, and navigation systems.
Pacemakers
For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
This is not a toy
Neodymium magnets are not toys. Swallowing several magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates urgent medical intervention.
Hand protection
Pinching hazard: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Do not overheat magnets
Control the heat. Heating the magnet to high heat will destroy its magnetic structure and strength.
