MPL 15x10x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020388
GTIN/EAN: 5906301811879
- length
- 15 mm [±0,1 mm]
- Width
- 10 mm [±0,1 mm]
- Height
- 2 mm [±0,1 mm]
- Weight
- 2.25 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
1.070 zł net / pcs
1.316 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
How much will a block magnet really hold?
What is the maximum working temperature?
What safety factor should I allow?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Physical properties - MPL 15x10x2 / N38 - lamellar magnet
Specification / characteristics - MPL 15x10x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020388 |
| GTIN/EAN | 5906301811879 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 2.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.57 kg / 15.45 N |
| Magnetic Induction ~ ? | 180.53 mT / 1805 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 modeling of the product - data
The following values are the outcome of a mathematical calculation. Values are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs gap) - characteristics
MPL 15x10x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1805 Gs
180.5 mT
|
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
low risk |
| 1 mm |
1628 Gs
162.8 mT
|
1.28 kg / 2.82 lbs
1278.3 g / 12.5 N
|
low risk |
| 2 mm |
1394 Gs
139.4 mT
|
0.94 kg / 2.06 lbs
936.3 g / 9.2 N
|
low risk |
| 3 mm |
1152 Gs
115.2 mT
|
0.64 kg / 1.41 lbs
639.9 g / 6.3 N
|
low risk |
| 5 mm |
751 Gs
75.1 mT
|
0.27 kg / 0.60 lbs
271.5 g / 2.7 N
|
low risk |
| 10 mm |
262 Gs
26.2 mT
|
0.03 kg / 0.07 lbs
33.1 g / 0.3 N
|
low risk |
| 15 mm |
110 Gs
11.0 mT
|
0.01 kg / 0.01 lbs
5.8 g / 0.1 N
|
low risk |
| 20 mm |
54 Gs
5.4 mT
|
0.00 kg / 0.00 lbs
1.4 g / 0.0 N
|
low risk |
| 30 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
low risk |
| 50 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical force (wall)
MPL 15x10x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.31 kg / 0.69 lbs
314.0 g / 3.1 N
|
| 1 mm | Stal (~0.2) |
0.26 kg / 0.56 lbs
256.0 g / 2.5 N
|
| 2 mm | Stal (~0.2) |
0.19 kg / 0.41 lbs
188.0 g / 1.8 N
|
| 3 mm | Stal (~0.2) |
0.13 kg / 0.28 lbs
128.0 g / 1.3 N
|
| 5 mm | Stal (~0.2) |
0.05 kg / 0.12 lbs
54.0 g / 0.5 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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) - behavior on slippery surfaces
MPL 15x10x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.47 kg / 1.04 lbs
471.0 g / 4.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.31 kg / 0.69 lbs
314.0 g / 3.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.16 kg / 0.35 lbs
157.0 g / 1.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.79 kg / 1.73 lbs
785.0 g / 7.7 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 15x10x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.16 kg / 0.35 lbs
157.0 g / 1.5 N
|
| 1 mm |
|
0.39 kg / 0.87 lbs
392.5 g / 3.9 N
|
| 2 mm |
|
0.79 kg / 1.73 lbs
785.0 g / 7.7 N
|
| 3 mm |
|
1.18 kg / 2.60 lbs
1177.5 g / 11.6 N
|
| 5 mm |
|
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
| 10 mm |
|
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
| 11 mm |
|
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
| 12 mm |
|
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
Table 5: Thermal stability (stability) - power drop
MPL 15x10x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.57 kg / 3.46 lbs
1570.0 g / 15.4 N
|
OK |
| 40 °C | -2.2% |
1.54 kg / 3.39 lbs
1535.5 g / 15.1 N
|
OK |
| 60 °C | -4.4% |
1.50 kg / 3.31 lbs
1500.9 g / 14.7 N
|
|
| 80 °C | -6.6% |
1.47 kg / 3.23 lbs
1466.4 g / 14.4 N
|
|
| 100 °C | -28.8% |
1.12 kg / 2.46 lbs
1117.8 g / 11.0 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 15x10x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
3.01 kg / 6.64 lbs
3 196 Gs
|
0.45 kg / 1.00 lbs
452 g / 4.4 N
|
N/A |
| 1 mm |
2.76 kg / 6.09 lbs
3 456 Gs
|
0.41 kg / 0.91 lbs
414 g / 4.1 N
|
2.49 kg / 5.48 lbs
~0 Gs
|
| 2 mm |
2.45 kg / 5.41 lbs
3 257 Gs
|
0.37 kg / 0.81 lbs
368 g / 3.6 N
|
2.21 kg / 4.87 lbs
~0 Gs
|
| 3 mm |
2.12 kg / 4.68 lbs
3 029 Gs
|
0.32 kg / 0.70 lbs
318 g / 3.1 N
|
1.91 kg / 4.21 lbs
~0 Gs
|
| 5 mm |
1.49 kg / 3.30 lbs
2 543 Gs
|
0.22 kg / 0.49 lbs
224 g / 2.2 N
|
1.35 kg / 2.97 lbs
~0 Gs
|
| 10 mm |
0.52 kg / 1.15 lbs
1 501 Gs
|
0.08 kg / 0.17 lbs
78 g / 0.8 N
|
0.47 kg / 1.03 lbs
~0 Gs
|
| 20 mm |
0.06 kg / 0.14 lbs
524 Gs
|
0.01 kg / 0.02 lbs
10 g / 0.1 N
|
0.06 kg / 0.13 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
60 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
37 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
24 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
16 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
12 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
9 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 15x10x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.0 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: Impact energy (cracking risk) - collision effects
MPL 15x10x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.20 km/h
(6.44 m/s)
|
0.05 J | |
| 30 mm |
23.43 km/h
(6.51 m/s)
|
0.05 J | |
| 50 mm |
23.41 km/h
(6.50 m/s)
|
0.05 J | |
| 100 mm |
23.44 km/h
(6.51 m/s)
|
0.05 J |
Table 9: Coating parameters (durability)
MPL 15x10x2 / 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 (Flux)
MPL 15x10x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 194 Mx | 31.9 µWb |
| Pc Coefficient | 0.22 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 15x10x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.57 kg | Standard |
| Water (riverbed) |
1.80 kg
(+0.23 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical wall, the magnet retains only ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely limits the holding force.
3. Power loss vs temp
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.22
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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Advantages and disadvantages of neodymium magnets.
Advantages
- They do not lose magnetism, even during approximately 10 years – the reduction in strength is only ~1% (according to tests),
- They possess excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
- A magnet with a smooth nickel surface has an effective appearance,
- Magnetic induction on the surface of the magnet remains very high,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
- Thanks to flexibility in designing and the capacity to customize to specific needs,
- Universal use in future technologies – they find application in magnetic memories, motor assemblies, precision medical tools, as well as other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets lose their strength 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Additionally, small elements of these products are able to complicate diagnosis medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Pull force analysis
Best holding force of the magnet in ideal parameters – what affects it?
- using a plate made of high-permeability steel, acting as a circuit closing element
- whose thickness reaches at least 10 mm
- with an polished touching surface
- under conditions of no distance (surface-to-surface)
- under perpendicular application of breakaway force (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Gap (betwixt the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Plate material – mild steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.
H&S for magnets
Beware of splinters
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Magnetic interference
Navigation devices and mobile phones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Do not give to children
Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.
Bone fractures
Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Use thick gloves.
Protect data
Intense magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Thermal limits
Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.
Nickel allergy
Some people suffer from a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact can result in dermatitis. We recommend wear protective gloves.
Dust is flammable
Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.
Handling rules
Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.
Danger to pacemakers
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
