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
How we measure these parameters — certificates and measurements
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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Product card - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 |
Engineering modeling of the magnet - report
The following information are the outcome of a physical calculation. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs distance) - interaction chart
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 capacity (vertical surface)
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 (sliding) - vertical pull
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 (saturation) - sheet metal selection
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: Working in heat (stability) - thermal limit
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: Two magnets (repulsion) - field collision
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: Safety (HSE) (electronics) - 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 |
| Timepiece | 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 (kinetic energy) - warning
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: Anti-corrosion coating 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: Construction data (Pc)
MPL 15x10x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 194 Mx | 31.9 µWb |
| Pc Coefficient | 0.22 | Low (Flat) |
Table 11: Physics of underwater searching
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 merely ~20% of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. 0.5mm PC case) severely reduces 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.
Chemical composition
| 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Strengths and weaknesses of neodymium magnets.
Strengths
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- They have excellent resistance to magnetism drop when exposed to external fields,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Magnets exhibit impressive magnetic induction on the active area,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of exact shaping as well as adjusting to concrete applications,
- Key role in advanced technology sectors – they are commonly used in magnetic memories, electric motors, medical devices, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited possibility of making nuts in the magnet and complex forms - preferred is a housing - mounting mechanism.
- Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
- Due to expensive raw materials, their price is higher than average,
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
- with a cross-section of at least 10 mm
- characterized by smoothness
- under conditions of ideal adhesion (surface-to-surface)
- during detachment in a direction perpendicular to the mounting surface
- at ambient temperature approx. 20 degrees Celsius
Determinants of lifting force in real conditions
- Distance – existence of any layer (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and holding force.
- Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.
Safety rules for work with neodymium magnets
Machining danger
Powder created during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
Protect data
Data protection: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).
Do not overheat magnets
Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and strength.
Magnets are brittle
Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Pacemakers
For implant holders: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Powerful field
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
GPS Danger
Be aware: rare earth magnets generate a field that confuses precision electronics. Keep a separation from your mobile, device, and navigation systems.
Allergic reactions
It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or choose versions in plastic housing.
Keep away from children
Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Keep away from kids and pets.
Bone fractures
Big blocks can break fingers instantly. Do not put your hand betwixt two attracting surfaces.
