MPL 15x2x30 / N38 - lamellar magnet
lamellar magnet
Catalog no 020121
GTIN/EAN: 5906301811275
length
15 mm [±0,1 mm]
Width
2 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
6.75 g
Magnetization Direction
→ diametrical
Load capacity
0.68 kg / 6.68 N
Magnetic Induction
614.34 mT / 6143 Gs
Coating
[NiCuNi] Nickel
4.75 ZŁ with VAT / pcs + price for transport
3.86 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MPL 15x2x30 / N38 - lamellar magnet
Specification / characteristics - MPL 15x2x30 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020121 |
| GTIN/EAN | 5906301811275 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 2 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 6.75 g |
| Magnetization Direction | → diametrical |
| Load capacity ~ ? | 0.68 kg / 6.68 N |
| Magnetic Induction ~ ? | 614.34 mT / 6143 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 simulation of the assembly - data
The following information represent the result of a physical analysis. Results were calculated on models for the material Nd2Fe14B. Real-world performance may deviate from the simulation results. Treat these data as a reference point during assembly planning.
Table 1: Static force (pull vs distance) - power drop
MPL 15x2x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6128 Gs
612.8 mT
|
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
weak grip |
| 1 mm |
3036 Gs
303.6 mT
|
0.17 kg / 0.37 LBS
166.8 g / 1.6 N
|
weak grip |
| 2 mm |
1736 Gs
173.6 mT
|
0.05 kg / 0.12 LBS
54.5 g / 0.5 N
|
weak grip |
| 3 mm |
1150 Gs
115.0 mT
|
0.02 kg / 0.05 LBS
23.9 g / 0.2 N
|
weak grip |
| 5 mm |
623 Gs
62.3 mT
|
0.01 kg / 0.02 LBS
7.0 g / 0.1 N
|
weak grip |
| 10 mm |
218 Gs
21.8 mT
|
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
|
weak grip |
| 15 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
weak grip |
| 20 mm |
58 Gs
5.8 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
weak grip |
| 30 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage capacity (vertical surface)
MPL 15x2x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.30 LBS
136.0 g / 1.3 N
|
| 1 mm | Stal (~0.2) |
0.03 kg / 0.07 LBS
34.0 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 / 0.01 LBS
4.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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 (shearing) - vertical pull
MPL 15x2x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.20 kg / 0.45 LBS
204.0 g / 2.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.30 LBS
136.0 g / 1.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 LBS
68.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.34 kg / 0.75 LBS
340.0 g / 3.3 N
|
Table 4: Steel thickness (saturation) - power losses
MPL 15x2x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 LBS
68.0 g / 0.7 N
|
| 1 mm |
|
0.17 kg / 0.37 LBS
170.0 g / 1.7 N
|
| 2 mm |
|
0.34 kg / 0.75 LBS
340.0 g / 3.3 N
|
| 3 mm |
|
0.51 kg / 1.12 LBS
510.0 g / 5.0 N
|
| 5 mm |
|
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
| 10 mm |
|
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
| 11 mm |
|
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
| 12 mm |
|
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
Table 5: Working in heat (stability) - power drop
MPL 15x2x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
|
OK |
| 40 °C | -2.2% |
0.67 kg / 1.47 LBS
665.0 g / 6.5 N
|
OK |
| 60 °C | -4.4% |
0.65 kg / 1.43 LBS
650.1 g / 6.4 N
|
OK |
| 80 °C | -6.6% |
0.64 kg / 1.40 LBS
635.1 g / 6.2 N
|
|
| 100 °C | -28.8% |
0.48 kg / 1.07 LBS
484.2 g / 4.7 N
|
Table 6: Two magnets (attraction) - field range
MPL 15x2x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
6.95 kg / 15.31 LBS
6 152 Gs
|
1.04 kg / 2.30 LBS
1042 g / 10.2 N
|
N/A |
| 1 mm |
3.45 kg / 7.62 LBS
8 643 Gs
|
0.52 kg / 1.14 LBS
518 g / 5.1 N
|
3.11 kg / 6.85 LBS
~0 Gs
|
| 2 mm |
1.70 kg / 3.76 LBS
6 071 Gs
|
0.26 kg / 0.56 LBS
256 g / 2.5 N
|
1.53 kg / 3.38 LBS
~0 Gs
|
| 3 mm |
0.93 kg / 2.05 LBS
4 482 Gs
|
0.14 kg / 0.31 LBS
139 g / 1.4 N
|
0.84 kg / 1.84 LBS
~0 Gs
|
| 5 mm |
0.36 kg / 0.79 LBS
2 788 Gs
|
0.05 kg / 0.12 LBS
54 g / 0.5 N
|
0.32 kg / 0.71 LBS
~0 Gs
|
| 10 mm |
0.07 kg / 0.16 LBS
1 247 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.06 kg / 0.14 LBS
~0 Gs
|
| 20 mm |
0.01 kg / 0.02 LBS
435 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
71 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
47 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
33 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
24 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
18 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
14 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 15x2x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 50 Gs (5.0 mT) | 2.5 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 15x2x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
10.13 km/h
(2.81 m/s)
|
0.03 J | |
| 30 mm |
17.53 km/h
(4.87 m/s)
|
0.08 J | |
| 50 mm |
22.63 km/h
(6.29 m/s)
|
0.13 J | |
| 100 mm |
32.01 km/h
(8.89 m/s)
|
0.27 J |
Table 9: Corrosion resistance
MPL 15x2x30 / 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 15x2x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 210 Mx | 22.1 µWb |
| Pc Coefficient | 1.54 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MPL 15x2x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.68 kg | Standard |
| Water (riverbed) |
0.78 kg
(+0.10 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical surface, the magnet holds merely ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Thermal stability
*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) = 1.54
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.
Elemental analysis
| 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 |
See also products
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- They do not lose power, even over around ten years – the decrease in lifting capacity is only ~1% (theoretically),
- They are resistant to demagnetization induced by external disturbances,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to look better,
- Magnetic induction on the working part of the magnet is impressive,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- In view of the potential of free forming and customization to custom projects, magnetic components can be created in a variety of geometric configurations, which makes them more universal,
- Key role in modern technologies – they are utilized in mass storage devices, electric drive systems, medical equipment, and modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 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 shapes - recommended is a housing - mounting mechanism.
- Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Lifting parameters
Highest magnetic holding force – what contributes to it?
- on a base made of structural steel, perfectly concentrating the magnetic field
- with a cross-section minimum 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (surface-to-surface)
- during detachment in a direction perpendicular to the plane
- at temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of maximum force).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Steel type – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
- Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was determined with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Hand protection
Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Cards and drives
Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).
No play value
Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.
Magnetic interference
GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.
Nickel allergy
Some people suffer from a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact might lead to skin redness. It is best to use safety gloves.
Permanent damage
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.
Powerful field
Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can react.
Protective goggles
Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets leads to them shattering into shards.
Health Danger
Individuals with a pacemaker must keep an absolute distance from magnets. The magnetic field can interfere with the operation of the implant.
Do not drill into magnets
Powder generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
