MPL 15x15x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020120
GTIN/EAN: 5906301811268
length
15 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
8.44 g
Magnetization Direction
↑ axial
Load capacity
5.87 kg / 57.62 N
Magnetic Induction
318.00 mT / 3180 Gs
Coating
[NiCuNi] Nickel
4.03 ZŁ with VAT / pcs + price for transport
3.28 ZŁ net + 23% VAT / pcs
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Technical data of the product - MPL 15x15x5 / N38 - lamellar magnet
Specification / characteristics - MPL 15x15x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020120 |
| GTIN/EAN | 5906301811268 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 8.44 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 5.87 kg / 57.62 N |
| Magnetic Induction ~ ? | 318.00 mT / 3180 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 assembly - data
These values represent the direct effect of a physical analysis. Values are based on models for the material Nd2Fe14B. Real-world performance may differ. Please consider these data as a reference point for designers.
Table 1: Static pull force (pull vs gap) - characteristics
MPL 15x15x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3179 Gs
317.9 mT
|
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
medium risk |
| 1 mm |
2873 Gs
287.3 mT
|
4.79 kg / 10.57 pounds
4794.1 g / 47.0 N
|
medium risk |
| 2 mm |
2528 Gs
252.8 mT
|
3.71 kg / 8.18 pounds
3712.5 g / 36.4 N
|
medium risk |
| 3 mm |
2181 Gs
218.1 mT
|
2.76 kg / 6.09 pounds
2763.0 g / 27.1 N
|
medium risk |
| 5 mm |
1565 Gs
156.5 mT
|
1.42 kg / 3.14 pounds
1422.0 g / 13.9 N
|
low risk |
| 10 mm |
659 Gs
65.9 mT
|
0.25 kg / 0.56 pounds
252.1 g / 2.5 N
|
low risk |
| 15 mm |
307 Gs
30.7 mT
|
0.05 kg / 0.12 pounds
54.7 g / 0.5 N
|
low risk |
| 20 mm |
162 Gs
16.2 mT
|
0.02 kg / 0.03 pounds
15.2 g / 0.1 N
|
low risk |
| 30 mm |
59 Gs
5.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
low risk |
| 50 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
Table 2: Vertical hold (vertical surface)
MPL 15x15x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.17 kg / 2.59 pounds
1174.0 g / 11.5 N
|
| 1 mm | Stal (~0.2) |
0.96 kg / 2.11 pounds
958.0 g / 9.4 N
|
| 2 mm | Stal (~0.2) |
0.74 kg / 1.64 pounds
742.0 g / 7.3 N
|
| 3 mm | Stal (~0.2) |
0.55 kg / 1.22 pounds
552.0 g / 5.4 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.63 pounds
284.0 g / 2.8 N
|
| 10 mm | Stal (~0.2) |
0.05 kg / 0.11 pounds
50.0 g / 0.5 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 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 15x15x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.76 kg / 3.88 pounds
1761.0 g / 17.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.17 kg / 2.59 pounds
1174.0 g / 11.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.59 kg / 1.29 pounds
587.0 g / 5.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.94 kg / 6.47 pounds
2935.0 g / 28.8 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 15x15x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.59 kg / 1.29 pounds
587.0 g / 5.8 N
|
| 1 mm |
|
1.47 kg / 3.24 pounds
1467.5 g / 14.4 N
|
| 2 mm |
|
2.94 kg / 6.47 pounds
2935.0 g / 28.8 N
|
| 3 mm |
|
4.40 kg / 9.71 pounds
4402.5 g / 43.2 N
|
| 5 mm |
|
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
| 10 mm |
|
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
| 11 mm |
|
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
| 12 mm |
|
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 15x15x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.87 kg / 12.94 pounds
5870.0 g / 57.6 N
|
OK |
| 40 °C | -2.2% |
5.74 kg / 12.66 pounds
5740.9 g / 56.3 N
|
OK |
| 60 °C | -4.4% |
5.61 kg / 12.37 pounds
5611.7 g / 55.1 N
|
|
| 80 °C | -6.6% |
5.48 kg / 12.09 pounds
5482.6 g / 53.8 N
|
|
| 100 °C | -28.8% |
4.18 kg / 9.21 pounds
4179.4 g / 41.0 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 15x15x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
14.02 kg / 30.90 pounds
4 741 Gs
|
2.10 kg / 4.64 pounds
2103 g / 20.6 N
|
N/A |
| 1 mm |
12.77 kg / 28.15 pounds
6 068 Gs
|
1.92 kg / 4.22 pounds
1916 g / 18.8 N
|
11.49 kg / 25.34 pounds
~0 Gs
|
| 2 mm |
11.45 kg / 25.24 pounds
5 746 Gs
|
1.72 kg / 3.79 pounds
1717 g / 16.8 N
|
10.30 kg / 22.72 pounds
~0 Gs
|
| 3 mm |
10.13 kg / 22.34 pounds
5 405 Gs
|
1.52 kg / 3.35 pounds
1520 g / 14.9 N
|
9.12 kg / 20.10 pounds
~0 Gs
|
| 5 mm |
7.68 kg / 16.93 pounds
4 706 Gs
|
1.15 kg / 2.54 pounds
1152 g / 11.3 N
|
6.91 kg / 15.24 pounds
~0 Gs
|
| 10 mm |
3.40 kg / 7.49 pounds
3 129 Gs
|
0.51 kg / 1.12 pounds
509 g / 5.0 N
|
3.06 kg / 6.74 pounds
~0 Gs
|
| 20 mm |
0.60 kg / 1.33 pounds
1 318 Gs
|
0.09 kg / 0.20 pounds
90 g / 0.9 N
|
0.54 kg / 1.19 pounds
~0 Gs
|
| 50 mm |
0.01 kg / 0.03 pounds
188 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 pounds
118 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
79 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
55 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
40 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
30 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 15x15x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 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) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MPL 15x15x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
27.30 km/h
(7.58 m/s)
|
0.24 J | |
| 30 mm |
46.08 km/h
(12.80 m/s)
|
0.69 J | |
| 50 mm |
59.47 km/h
(16.52 m/s)
|
1.15 J | |
| 100 mm |
84.11 km/h
(23.36 m/s)
|
2.30 J |
Table 9: Corrosion resistance
MPL 15x15x5 / 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: Electrical data (Pc)
MPL 15x15x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 7 651 Mx | 76.5 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 15x15x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 5.87 kg | Standard |
| Water (riverbed) |
6.72 kg
(+0.85 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical wall, the magnet holds only a fraction of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. computer case) severely reduces the holding force.
3. Power loss vs temp
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.40
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 |
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Strengths as well as weaknesses of Nd2Fe14B magnets.
Advantages
- Their strength remains stable, and after approximately ten years it drops only by ~1% (according to research),
- They do not lose their magnetic properties even under external field action,
- The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnets exhibit very high magnetic induction on the outer side,
- 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 exact machining and optimizing to defined needs,
- Huge importance in electronics industry – they are used in HDD drives, motor assemblies, diagnostic systems, as well as industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Cons
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Limited possibility of making nuts in the magnet and complex shapes - recommended is casing - magnetic holder.
- Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- using a base made of low-carbon steel, functioning as a magnetic yoke
- possessing a massiveness of at least 10 mm to ensure full flux closure
- with a plane perfectly flat
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction perpendicular to the plane
- in temp. approx. 20°C
Determinants of practical lifting force of a magnet
- Clearance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
- Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
- Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.
Warnings
Risk of cracking
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Allergy Warning
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.
Dust explosion hazard
Dust created during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
Health Danger
For implant holders: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.
Bone fractures
Danger of trauma: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
Keep away from computers
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, mechanical watches).
Respect the power
Handle magnets consciously. Their immense force can shock even professionals. Plan your moves and do not underestimate their power.
This is not a toy
Neodymium magnets are not toys. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.
Threat to navigation
Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.
Operating temperature
Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. This process is irreversible.
