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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Physical properties - 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 analysis of the product - technical parameters
The following information constitute the outcome of a mathematical analysis. Values are based on models for the class Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
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: Sliding hold (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: Vertical assembly (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 (substrate influence) - 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: Thermal resistance (stability) - resistance threshold
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: Magnet-Magnet interaction (attraction) - field collision
MPL 15x2x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (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: Protective zones (implants) - 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 |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 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 (cracking risk) - 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: Surface protection spec
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: Submerged application
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. Shear force
*Note: On a vertical wall, the magnet holds merely a fraction of its max power.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.
3. Power loss vs temp
*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) = 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 |
Other offers
Pros and cons of Nd2Fe14B magnets.
Benefits
- They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
- They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
- A magnet with a shiny nickel surface looks better,
- Magnets have impressive magnetic induction on the outer layer,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Possibility of individual forming as well as adjusting to precise applications,
- Versatile presence in advanced technology sectors – they find application in mass storage devices, electric motors, diagnostic systems, and industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium magnets decrease their force 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 stability even at temperatures up to 230°C
- 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
- We suggest a housing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
- Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum holding power of the magnet – what affects it?
- on a base made of mild steel, optimally conducting the magnetic field
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a plane free of scratches
- with zero gap (without coatings)
- under perpendicular force vector (90-degree angle)
- at temperature approx. 20 degrees Celsius
What influences lifting capacity in practice
- Gap (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
- Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
- Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the holding force.
Safety rules for work with NdFeB magnets
Swallowing risk
Always store magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are fatal.
Electronic hazard
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.
Shattering risk
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Impact on smartphones
A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.
Operating temperature
Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.
Allergic reactions
Studies show that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, avoid touching magnets with bare hands and select versions in plastic housing.
Danger to pacemakers
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Do not underestimate power
Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Fire warning
Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Serious injuries
Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!
