MPL 30x15x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020140
GTIN/EAN: 5906301811466
length
30 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
6.75 g
Magnetization Direction
↑ axial
Load capacity
2.11 kg / 20.74 N
Magnetic Induction
115.11 mT / 1151 Gs
Coating
[NiCuNi] Nickel
3.89 ZŁ with VAT / pcs + price for transport
3.16 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 30x15x2 / N38 - lamellar magnet
Specification / characteristics - MPL 30x15x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020140 |
| GTIN/EAN | 5906301811466 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 6.75 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.11 kg / 20.74 N |
| Magnetic Induction ~ ? | 115.11 mT / 1151 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 analysis of the product - report
Presented values are the direct effect of a mathematical simulation. Results rely on models for the class Nd2Fe14B. Operational parameters may differ. Treat these data as a preliminary roadmap for designers.
Table 1: Static force (force vs gap) - interaction chart
MPL 30x15x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1151 Gs
115.1 mT
|
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
warning |
| 1 mm |
1098 Gs
109.8 mT
|
1.92 kg / 4.23 LBS
1920.5 g / 18.8 N
|
low risk |
| 2 mm |
1019 Gs
101.9 mT
|
1.65 kg / 3.65 LBS
1654.9 g / 16.2 N
|
low risk |
| 3 mm |
926 Gs
92.6 mT
|
1.37 kg / 3.01 LBS
1365.9 g / 13.4 N
|
low risk |
| 5 mm |
733 Gs
73.3 mT
|
0.86 kg / 1.89 LBS
855.2 g / 8.4 N
|
low risk |
| 10 mm |
379 Gs
37.9 mT
|
0.23 kg / 0.50 LBS
228.8 g / 2.2 N
|
low risk |
| 15 mm |
203 Gs
20.3 mT
|
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
|
low risk |
| 20 mm |
116 Gs
11.6 mT
|
0.02 kg / 0.05 LBS
21.6 g / 0.2 N
|
low risk |
| 30 mm |
46 Gs
4.6 mT
|
0.00 kg / 0.01 LBS
3.4 g / 0.0 N
|
low risk |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
low risk |
Table 2: Shear load (wall)
MPL 30x15x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.42 kg / 0.93 LBS
422.0 g / 4.1 N
|
| 1 mm | Stal (~0.2) |
0.38 kg / 0.85 LBS
384.0 g / 3.8 N
|
| 2 mm | Stal (~0.2) |
0.33 kg / 0.73 LBS
330.0 g / 3.2 N
|
| 3 mm | Stal (~0.2) |
0.27 kg / 0.60 LBS
274.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.17 kg / 0.38 LBS
172.0 g / 1.7 N
|
| 10 mm | Stal (~0.2) |
0.05 kg / 0.10 LBS
46.0 g / 0.5 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 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 30x15x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.63 kg / 1.40 LBS
633.0 g / 6.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.42 kg / 0.93 LBS
422.0 g / 4.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.21 kg / 0.47 LBS
211.0 g / 2.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.06 kg / 2.33 LBS
1055.0 g / 10.3 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x15x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.21 kg / 0.47 LBS
211.0 g / 2.1 N
|
| 1 mm |
|
0.53 kg / 1.16 LBS
527.5 g / 5.2 N
|
| 2 mm |
|
1.06 kg / 2.33 LBS
1055.0 g / 10.3 N
|
| 3 mm |
|
1.58 kg / 3.49 LBS
1582.5 g / 15.5 N
|
| 5 mm |
|
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
| 10 mm |
|
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
| 11 mm |
|
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
| 12 mm |
|
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
Table 5: Working in heat (stability) - resistance threshold
MPL 30x15x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
|
OK |
| 40 °C | -2.2% |
2.06 kg / 4.55 LBS
2063.6 g / 20.2 N
|
OK |
| 60 °C | -4.4% |
2.02 kg / 4.45 LBS
2017.2 g / 19.8 N
|
|
| 80 °C | -6.6% |
1.97 kg / 4.34 LBS
1970.7 g / 19.3 N
|
|
| 100 °C | -28.8% |
1.50 kg / 3.31 LBS
1502.3 g / 14.7 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 30x15x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.67 kg / 8.10 LBS
2 169 Gs
|
0.55 kg / 1.22 LBS
551 g / 5.4 N
|
N/A |
| 1 mm |
3.53 kg / 7.79 LBS
2 257 Gs
|
0.53 kg / 1.17 LBS
530 g / 5.2 N
|
3.18 kg / 7.01 LBS
~0 Gs
|
| 2 mm |
3.34 kg / 7.37 LBS
2 196 Gs
|
0.50 kg / 1.11 LBS
502 g / 4.9 N
|
3.01 kg / 6.64 LBS
~0 Gs
|
| 3 mm |
3.12 kg / 6.89 LBS
2 122 Gs
|
0.47 kg / 1.03 LBS
469 g / 4.6 N
|
2.81 kg / 6.20 LBS
~0 Gs
|
| 5 mm |
2.63 kg / 5.80 LBS
1 948 Gs
|
0.39 kg / 0.87 LBS
395 g / 3.9 N
|
2.37 kg / 5.22 LBS
~0 Gs
|
| 10 mm |
1.49 kg / 3.28 LBS
1 465 Gs
|
0.22 kg / 0.49 LBS
223 g / 2.2 N
|
1.34 kg / 2.96 LBS
~0 Gs
|
| 20 mm |
0.40 kg / 0.88 LBS
758 Gs
|
0.06 kg / 0.13 LBS
60 g / 0.6 N
|
0.36 kg / 0.79 LBS
~0 Gs
|
| 50 mm |
0.01 kg / 0.03 LBS
142 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 LBS
92 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 LBS
63 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
44 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
32 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
24 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MPL 30x15x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (kinetic energy) - warning
MPL 30x15x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.00 km/h
(5.28 m/s)
|
0.09 J | |
| 30 mm |
30.91 km/h
(8.59 m/s)
|
0.25 J | |
| 50 mm |
39.87 km/h
(11.08 m/s)
|
0.41 J | |
| 100 mm |
56.39 km/h
(15.66 m/s)
|
0.83 J |
Table 9: Coating parameters (durability)
MPL 30x15x2 / 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 30x15x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 236 Mx | 62.4 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 30x15x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.11 kg | Standard |
| Water (riverbed) |
2.42 kg
(+0.31 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Temperature resistance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13
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 offers
Advantages as well as disadvantages of neodymium magnets.
Pros
- They retain full power for around 10 years – the loss is just ~1% (based on simulations),
- They maintain their magnetic properties even under close interference source,
- By using a shiny layer of nickel, the element has an proper look,
- They show high magnetic induction at the operating surface, making them more effective,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
- Possibility of detailed creating and adjusting to specific requirements,
- Huge importance in advanced technology sectors – they find application in computer drives, motor assemblies, diagnostic systems, also complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Limited ability of making threads in the magnet and complicated forms - preferred is cover - magnet mounting.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Best holding force of the magnet in ideal parameters – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic field
- whose transverse dimension reaches at least 10 mm
- with an ground touching surface
- under conditions of no distance (surface-to-surface)
- for force applied at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Practical aspects of lifting capacity – factors
- Distance (betwixt the magnet and the metal), since even a very small 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 – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
- Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.
H&S for magnets
Safe distance
Do not bring magnets near a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.
Avoid contact if allergic
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease handling magnets and wear gloves.
Life threat
For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.
Do not drill into magnets
Powder generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Do not give to children
Strictly keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are very dangerous.
GPS Danger
A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a device to avoid damaging the sensors.
Finger safety
Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Safe operation
Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.
Magnets are brittle
Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Permanent damage
Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.
