MPL 10x10x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020111
GTIN/EAN: 5906301811176
- length
- 10 mm [±0,1 mm]
- Width
- 10 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 2.25 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
1.150 zł net / pcs
1.414 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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Technical of the product - MPL 10x10x3 / N38 - lamellar magnet
Specification / characteristics - MPL 10x10x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020111 |
| GTIN/EAN | 5906301811176 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 10 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 2.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.32 kg / 22.77 N |
| Magnetic Induction ~ ? | 293.71 mT / 2937 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 |
Engineering simulation of the assembly - technical parameters
The following values represent the result of a engineering calculation. Results rely on algorithms for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Please consider these calculations as a reference point when designing systems.
Table 1: Static force (pull vs distance) - interaction chart
MPL 10x10x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2936 Gs
293.6 mT
|
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
strong |
| 1 mm |
2513 Gs
251.3 mT
|
1.70 kg / 3.75 pounds
1700.6 g / 16.7 N
|
weak grip |
| 2 mm |
2036 Gs
203.6 mT
|
1.12 kg / 2.46 pounds
1115.5 g / 10.9 N
|
weak grip |
| 3 mm |
1594 Gs
159.4 mT
|
0.68 kg / 1.51 pounds
683.9 g / 6.7 N
|
weak grip |
| 5 mm |
943 Gs
94.3 mT
|
0.24 kg / 0.53 pounds
239.3 g / 2.3 N
|
weak grip |
| 10 mm |
285 Gs
28.5 mT
|
0.02 kg / 0.05 pounds
21.8 g / 0.2 N
|
weak grip |
| 15 mm |
112 Gs
11.2 mT
|
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
|
weak grip |
| 20 mm |
54 Gs
5.4 mT
|
0.00 kg / 0.00 pounds
0.8 g / 0.0 N
|
weak grip |
| 30 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 50 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical hold (wall)
MPL 10x10x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.46 kg / 1.02 pounds
464.0 g / 4.6 N
|
| 1 mm | Stal (~0.2) |
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 2 mm | Stal (~0.2) |
0.22 kg / 0.49 pounds
224.0 g / 2.2 N
|
| 3 mm | Stal (~0.2) |
0.14 kg / 0.30 pounds
136.0 g / 1.3 N
|
| 5 mm | Stal (~0.2) |
0.05 kg / 0.11 pounds
48.0 g / 0.5 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 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: Vertical assembly (shearing) - vertical pull
MPL 10x10x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.70 kg / 1.53 pounds
696.0 g / 6.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.46 kg / 1.02 pounds
464.0 g / 4.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.23 kg / 0.51 pounds
232.0 g / 2.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.16 kg / 2.56 pounds
1160.0 g / 11.4 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MPL 10x10x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.23 kg / 0.51 pounds
232.0 g / 2.3 N
|
| 1 mm |
|
0.58 kg / 1.28 pounds
580.0 g / 5.7 N
|
| 2 mm |
|
1.16 kg / 2.56 pounds
1160.0 g / 11.4 N
|
| 3 mm |
|
1.74 kg / 3.84 pounds
1740.0 g / 17.1 N
|
| 5 mm |
|
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
| 10 mm |
|
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
| 11 mm |
|
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
| 12 mm |
|
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
Table 5: Thermal stability (stability) - power drop
MPL 10x10x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.32 kg / 5.11 pounds
2320.0 g / 22.8 N
|
OK |
| 40 °C | -2.2% |
2.27 kg / 5.00 pounds
2269.0 g / 22.3 N
|
OK |
| 60 °C | -4.4% |
2.22 kg / 4.89 pounds
2217.9 g / 21.8 N
|
|
| 80 °C | -6.6% |
2.17 kg / 4.78 pounds
2166.9 g / 21.3 N
|
|
| 100 °C | -28.8% |
1.65 kg / 3.64 pounds
1651.8 g / 16.2 N
|
Table 6: Two magnets (attraction) - field range
MPL 10x10x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.31 kg / 11.71 pounds
4 526 Gs
|
0.80 kg / 1.76 pounds
797 g / 7.8 N
|
N/A |
| 1 mm |
4.63 kg / 10.20 pounds
5 480 Gs
|
0.69 kg / 1.53 pounds
694 g / 6.8 N
|
4.17 kg / 9.18 pounds
~0 Gs
|
| 2 mm |
3.89 kg / 8.59 pounds
5 027 Gs
|
0.58 kg / 1.29 pounds
584 g / 5.7 N
|
3.51 kg / 7.73 pounds
~0 Gs
|
| 3 mm |
3.19 kg / 7.03 pounds
4 549 Gs
|
0.48 kg / 1.05 pounds
478 g / 4.7 N
|
2.87 kg / 6.33 pounds
~0 Gs
|
| 5 mm |
2.01 kg / 4.44 pounds
3 613 Gs
|
0.30 kg / 0.67 pounds
302 g / 3.0 N
|
1.81 kg / 3.99 pounds
~0 Gs
|
| 10 mm |
0.55 kg / 1.21 pounds
1 886 Gs
|
0.08 kg / 0.18 pounds
82 g / 0.8 N
|
0.49 kg / 1.09 pounds
~0 Gs
|
| 20 mm |
0.05 kg / 0.11 pounds
569 Gs
|
0.01 kg / 0.02 pounds
7 g / 0.1 N
|
0.04 kg / 0.10 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
60 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
36 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
24 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
16 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
12 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
9 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 10x10x3 / 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: Collisions (cracking risk) - warning
MPL 10x10x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.15 km/h
(6.99 m/s)
|
0.05 J | |
| 30 mm |
25.28 km/h
(7.02 m/s)
|
0.06 J | |
| 50 mm |
25.27 km/h
(7.02 m/s)
|
0.06 J | |
| 100 mm |
25.29 km/h
(7.02 m/s)
|
0.06 J |
Table 9: Surface protection spec
MPL 10x10x3 / 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 10x10x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 197 Mx | 32.0 µWb |
| Pc Coefficient | 0.36 | Low (Flat) |
Table 11: Submerged application
MPL 10x10x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.32 kg | Standard |
| Water (riverbed) |
2.66 kg
(+0.34 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) severely limits the holding force.
3. Temperature resistance
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.36
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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Pros and cons of rare earth magnets.
Pros
- They do not lose magnetism, even during nearly ten years – the drop in power is only ~1% (according to tests),
- They retain their magnetic properties even under close interference source,
- In other words, due to the smooth layer of nickel, the element becomes visually attractive,
- They feature high magnetic induction at the operating surface, which affects their effectiveness,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual modeling and adjusting to specific applications,
- Fundamental importance in advanced technology sectors – they are used in magnetic memories, electromotive mechanisms, medical devices, and other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices
Cons
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also increases their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- Due to limitations in creating nuts and complex forms in magnets, we propose using a housing - magnetic holder.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
- With mass production the cost of neodymium magnets is a challenge,
Pull force analysis
Highest magnetic holding force – what it depends on?
- using a base made of high-permeability steel, acting as a circuit closing element
- whose thickness reaches at least 10 mm
- characterized by smoothness
- under conditions of gap-free contact (metal-to-metal)
- during detachment in a direction perpendicular to the mounting surface
- in stable room temperature
Determinants of practical lifting force of a magnet
- Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Metal type – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Precautions when working with neodymium magnets
Keep away from children
Strictly store magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are very dangerous.
Cards and drives
Device Safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, timepieces).
Hand protection
Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Powerful field
Handle magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.
GPS Danger
A powerful magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent damaging the sensors.
Operating temperature
Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).
Health Danger
Patients with a heart stimulator have to maintain an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.
Magnets are brittle
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Nickel coating and allergies
Studies show that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and choose coated magnets.
Fire risk
Machining of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
