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:
Need more?
Call us
+48 888 99 98 98
alternatively get in touch through
our online form
the contact page.
Specifications along with shape of magnets can be analyzed using our
our magnetic calculator.
Orders placed before 14:00 will be shipped the same business day.
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 |
Technical modeling of the magnet - report
These values constitute the result of a mathematical analysis. Results are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Please consider these calculations as a supplementary guide during assembly planning.
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
|
safe |
| 1 mm |
2223 Gs
222.3 mT
|
0.08 kg / 0.18 LBS
79.9 g / 0.8 N
|
safe |
| 2 mm |
966 Gs
96.6 mT
|
0.02 kg / 0.03 LBS
15.1 g / 0.1 N
|
safe |
| 3 mm |
468 Gs
46.8 mT
|
0.00 kg / 0.01 LBS
3.5 g / 0.0 N
|
safe |
| 5 mm |
153 Gs
15.3 mT
|
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
|
safe |
| 10 mm |
26 Gs
2.6 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 15 mm |
9 Gs
0.9 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: Slippage capacity (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: Wall mounting (sliding) - 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: Material efficiency (substrate influence) - sheet metal selection
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: Working in heat (stability) - thermal limit
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: Magnet-Magnet interaction (attraction) - field range
MPL 3x3x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (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) (electronics) - precautionary measures
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 |
| Timepiece | 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: Dynamics (kinetic energy) - collision effects
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: Corrosion resistance
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 (Pc)
MPL 3x3x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 429 Mx | 4.3 µWb |
| Pc Coefficient | 0.66 | High (Stable) |
Table 11: Submerged application
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. Vertical hold
*Warning: On a vertical wall, the magnet holds just a fraction of its nominal pull.
2. Steel saturation
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Heat tolerance
*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) = 0.66
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.
Material specification
| 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 products
Pros and cons of neodymium magnets.
Benefits
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- Neodymium magnets remain exceptionally resistant to magnetic field loss caused by external field sources,
- By applying a reflective layer of silver, the element has an elegant look,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Thanks to modularity in shaping and the ability to customize to client solutions,
- Universal use in innovative solutions – they are commonly used in magnetic memories, electric drive systems, medical equipment, and modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets decrease their power 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 durability even at temperatures 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 stable to moisture, when using outdoors
- Limited ability of making nuts in the magnet and complicated forms - recommended is casing - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Best holding force of the magnet in ideal parameters – what contributes to it?
- on a block made of structural steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- with a plane free of scratches
- with zero gap (without paint)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
Practical lifting capacity: influencing factors
- Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Steel type – low-carbon steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Base smoothness – 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. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed by applying a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the holding force.
H&S for magnets
Pacemakers
Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Conscious usage
Use magnets with awareness. Their powerful strength can shock even professionals. Plan your moves and do not underestimate their force.
Fire risk
Powder created during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Physical harm
Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Risk of cracking
Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them shattering into shards.
Do not overheat magnets
Watch the temperature. Exposing the magnet to high heat will destroy its properties and strength.
Threat to navigation
Navigation devices and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.
Adults only
Only for adults. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.
Avoid contact if allergic
Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands and choose encased magnets.
Cards and drives
Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
