MPL 15x5x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020123
GTIN/EAN: 5906301811299
length
15 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
2.81 g
Magnetization Direction
↑ axial
Load capacity
3.20 kg / 31.38 N
Magnetic Induction
468.69 mT / 4687 Gs
Coating
[NiCuNi] Nickel
1.390 ZŁ with VAT / pcs + price for transport
1.130 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical data of the product - MPL 15x5x5 / N38 - lamellar magnet
Specification / characteristics - MPL 15x5x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020123 |
| GTIN/EAN | 5906301811299 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 2.81 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.20 kg / 31.38 N |
| Magnetic Induction ~ ? | 468.69 mT / 4687 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 modeling of the product - technical parameters
These information are the result of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational performance may differ. Use these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - interaction chart
MPL 15x5x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4682 Gs
468.2 mT
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
warning |
| 1 mm |
3410 Gs
341.0 mT
|
1.70 kg / 3.74 pounds
1697.3 g / 16.7 N
|
low risk |
| 2 mm |
2394 Gs
239.4 mT
|
0.84 kg / 1.84 pounds
836.5 g / 8.2 N
|
low risk |
| 3 mm |
1701 Gs
170.1 mT
|
0.42 kg / 0.93 pounds
422.6 g / 4.1 N
|
low risk |
| 5 mm |
928 Gs
92.8 mT
|
0.13 kg / 0.28 pounds
125.8 g / 1.2 N
|
low risk |
| 10 mm |
286 Gs
28.6 mT
|
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
|
low risk |
| 15 mm |
119 Gs
11.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
low risk |
| 20 mm |
59 Gs
5.9 mT
|
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
|
low risk |
| 30 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical capacity (wall)
MPL 15x5x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
|
| 1 mm | Stal (~0.2) |
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.37 pounds
168.0 g / 1.6 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.19 pounds
84.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.06 pounds
26.0 g / 0.3 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 15x5x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 15x5x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 1 mm |
|
0.80 kg / 1.76 pounds
800.0 g / 7.8 N
|
| 2 mm |
|
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
|
| 3 mm |
|
2.40 kg / 5.29 pounds
2400.0 g / 23.5 N
|
| 5 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 10 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 11 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 12 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
Table 5: Working in heat (stability) - power drop
MPL 15x5x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
OK |
| 40 °C | -2.2% |
3.13 kg / 6.90 pounds
3129.6 g / 30.7 N
|
OK |
| 60 °C | -4.4% |
3.06 kg / 6.74 pounds
3059.2 g / 30.0 N
|
|
| 80 °C | -6.6% |
2.99 kg / 6.59 pounds
2988.8 g / 29.3 N
|
|
| 100 °C | -28.8% |
2.28 kg / 5.02 pounds
2278.4 g / 22.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 15x5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
10.14 kg / 22.35 pounds
5 608 Gs
|
1.52 kg / 3.35 pounds
1520 g / 14.9 N
|
N/A |
| 1 mm |
7.53 kg / 16.60 pounds
8 071 Gs
|
1.13 kg / 2.49 pounds
1129 g / 11.1 N
|
6.78 kg / 14.94 pounds
~0 Gs
|
| 2 mm |
5.38 kg / 11.85 pounds
6 820 Gs
|
0.81 kg / 1.78 pounds
806 g / 7.9 N
|
4.84 kg / 10.67 pounds
~0 Gs
|
| 3 mm |
3.78 kg / 8.33 pounds
5 716 Gs
|
0.57 kg / 1.25 pounds
567 g / 5.6 N
|
3.40 kg / 7.49 pounds
~0 Gs
|
| 5 mm |
1.87 kg / 4.13 pounds
4 024 Gs
|
0.28 kg / 0.62 pounds
281 g / 2.8 N
|
1.68 kg / 3.71 pounds
~0 Gs
|
| 10 mm |
0.40 kg / 0.88 pounds
1 857 Gs
|
0.06 kg / 0.13 pounds
60 g / 0.6 N
|
0.36 kg / 0.79 pounds
~0 Gs
|
| 20 mm |
0.04 kg / 0.08 pounds
572 Gs
|
0.01 kg / 0.01 pounds
6 g / 0.1 N
|
0.03 kg / 0.08 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
67 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
41 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
27 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
19 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
14 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
10 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 15x5x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Timepiece | 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: Collisions (kinetic energy) - warning
MPL 15x5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
34.11 km/h
(9.48 m/s)
|
0.13 J | |
| 30 mm |
58.95 km/h
(16.37 m/s)
|
0.38 J | |
| 50 mm |
76.10 km/h
(21.14 m/s)
|
0.63 J | |
| 100 mm |
107.62 km/h
(29.90 m/s)
|
1.26 J |
Table 9: Corrosion resistance
MPL 15x5x5 / 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 15x5x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 366 Mx | 33.7 µWb |
| Pc Coefficient | 0.60 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 15x5x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.20 kg | Standard |
| Water (riverbed) |
3.66 kg
(+0.46 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly weakens 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) = 0.60
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of neodymium magnets.
Benefits
- They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
- Neodymium magnets are distinguished by highly resistant to magnetic field loss caused by external field sources,
- A magnet with a metallic gold surface looks better,
- They feature high magnetic induction at the operating surface, which increases their power,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to the potential of accurate forming and customization to unique requirements, magnetic components can be produced in a broad palette of shapes and sizes, which amplifies use scope,
- Universal use in modern technologies – they serve a role in hard drives, electric motors, medical devices, as well as industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited ability of making nuts in the magnet and complicated shapes - recommended is casing - mounting mechanism.
- Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
- Due to complex production process, their price is relatively high,
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- on a block made of mild steel, perfectly concentrating the magnetic field
- whose thickness reaches at least 10 mm
- with an polished touching surface
- under conditions of ideal adhesion (metal-to-metal)
- for force acting at a right angle (pull-off, not shear)
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Clearance – the presence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
GPS and phone interference
Be aware: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your mobile, device, and GPS.
Metal Allergy
It is widely known that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact or choose coated magnets.
Serious injuries
Big blocks can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.
Risk of cracking
Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Heat sensitivity
Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Do not underestimate power
Use magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and do not underestimate their power.
Combustion hazard
Powder produced during grinding of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Cards and drives
Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.
Implant safety
People with a ICD have to maintain an absolute distance from magnets. The magnetism can disrupt the operation of the implant.
Choking Hazard
Neodymium magnets are not suitable for play. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which poses a direct threat to life and requires immediate surgery.
