MPL 3x3x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020147
GTIN/EAN: 5906301811534
length
3 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.13 g
Magnetization Direction
↑ axial
Load capacity
0.36 kg / 3.49 N
Magnetic Induction
472.94 mT / 4729 Gs
Coating
[NiCuNi] Nickel
0.1722 ZŁ with VAT / pcs + price for transport
0.1400 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - MPL 3x3x2 / N38 - lamellar magnet
Specification / characteristics - MPL 3x3x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020147 |
| GTIN/EAN | 5906301811534 |
| 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 | 2 mm [±0,1 mm] |
| Weight | 0.13 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.36 kg / 3.49 N |
| Magnetic Induction ~ ? | 472.94 mT / 4729 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 simulation of the assembly - data
Presented data represent the direct effect of a mathematical analysis. Values are based on models for the class Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Use these calculations as a supplementary guide when designing systems.
Table 1: Static force (force vs distance) - interaction chart
MPL 3x3x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4719 Gs
471.9 mT
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
low risk |
| 1 mm |
2223 Gs
222.3 mT
|
0.08 kg / 0.18 LBS
79.9 g / 0.8 N
|
low risk |
| 2 mm |
966 Gs
96.6 mT
|
0.02 kg / 0.03 LBS
15.1 g / 0.1 N
|
low risk |
| 3 mm |
468 Gs
46.8 mT
|
0.00 kg / 0.01 LBS
3.5 g / 0.0 N
|
low risk |
| 5 mm |
153 Gs
15.3 mT
|
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
|
low risk |
| 10 mm |
26 Gs
2.6 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 15 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 20 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 30 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical force (vertical surface)
MPL 3x3x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.07 kg / 0.16 LBS
72.0 g / 0.7 N
|
| 1 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
16.0 g / 0.2 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 3x3x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.11 kg / 0.24 LBS
108.0 g / 1.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.07 kg / 0.16 LBS
72.0 g / 0.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.18 kg / 0.40 LBS
180.0 g / 1.8 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 3x3x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
|
| 1 mm |
|
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
| 2 mm |
|
0.18 kg / 0.40 LBS
180.0 g / 1.8 N
|
| 3 mm |
|
0.27 kg / 0.60 LBS
270.0 g / 2.6 N
|
| 5 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 10 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 11 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 12 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
Table 5: Thermal resistance (material behavior) - power drop
MPL 3x3x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
OK |
| 40 °C | -2.2% |
0.35 kg / 0.78 LBS
352.1 g / 3.5 N
|
OK |
| 60 °C | -4.4% |
0.34 kg / 0.76 LBS
344.2 g / 3.4 N
|
OK |
| 80 °C | -6.6% |
0.34 kg / 0.74 LBS
336.2 g / 3.3 N
|
|
| 100 °C | -28.8% |
0.26 kg / 0.57 LBS
256.3 g / 2.5 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 3x3x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.24 kg / 2.72 LBS
5 677 Gs
|
0.19 kg / 0.41 LBS
185 g / 1.8 N
|
N/A |
| 1 mm |
0.63 kg / 1.38 LBS
6 725 Gs
|
0.09 kg / 0.21 LBS
94 g / 0.9 N
|
0.56 kg / 1.24 LBS
~0 Gs
|
| 2 mm |
0.27 kg / 0.60 LBS
4 447 Gs
|
0.04 kg / 0.09 LBS
41 g / 0.4 N
|
0.25 kg / 0.54 LBS
~0 Gs
|
| 3 mm |
0.12 kg / 0.26 LBS
2 903 Gs
|
0.02 kg / 0.04 LBS
18 g / 0.2 N
|
0.11 kg / 0.23 LBS
~0 Gs
|
| 5 mm |
0.02 kg / 0.05 LBS
1 324 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.02 kg / 0.05 LBS
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 LBS
306 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
52 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
4 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
2 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: Safety (HSE) (implants) - warnings
MPL 3x3x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 1.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Car key | 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) - warning
MPL 3x3x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
53.07 km/h
(14.74 m/s)
|
0.01 J | |
| 30 mm |
91.92 km/h
(25.53 m/s)
|
0.04 J | |
| 50 mm |
118.67 km/h
(32.96 m/s)
|
0.07 J | |
| 100 mm |
167.83 km/h
(46.62 m/s)
|
0.14 J |
Table 9: Anti-corrosion coating durability
MPL 3x3x2 / 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 3x3x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 429 Mx | 4.3 µWb |
| Pc Coefficient | 0.66 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MPL 3x3x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.36 kg | Standard |
| Water (riverbed) |
0.41 kg
(+0.05 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Temperature resistance
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.66
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages as well as disadvantages of Nd2Fe14B magnets.
Strengths
- They have unchanged lifting capacity, and over around ten years their performance decreases symbolically – ~1% (in testing),
- They feature excellent resistance to magnetism drop as a result of external magnetic sources,
- Thanks to the metallic finish, the coating of nickel, gold-plated, or silver gives an visually attractive appearance,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of custom creating as well as modifying to individual requirements,
- Huge importance in innovative solutions – they are commonly used in data components, motor assemblies, precision medical tools, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures 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 secure oxidation as well as corrosion.
- We suggest a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Magnetic strength at its maximum – what affects it?
- using a base made of mild steel, functioning as a magnetic yoke
- with a thickness minimum 10 mm
- with an polished contact surface
- under conditions of gap-free contact (surface-to-surface)
- under vertical force direction (90-degree angle)
- in neutral thermal conditions
Practical lifting capacity: influencing factors
- Distance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
- Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
- Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate reduces the holding force.
Safety rules for work with neodymium magnets
Pinching danger
Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Eye protection
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets leads to them breaking into shards.
Threat to electronics
Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and wipe information from cards.
Operating temperature
Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.
Impact on smartphones
Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your mobile, tablet, and navigation systems.
Allergy Warning
Certain individuals experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Frequent touching may cause skin redness. We suggest wear safety gloves.
Fire risk
Machining of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Swallowing risk
Strictly store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are tragic.
ICD Warning
For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Powerful field
Handle with care. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.
