MPL 10x7x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020115
GTIN/EAN: 5906301811213
- length
- 10 mm [±0,1 mm]
- Width
- 7 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 1.58 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
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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 10x7x3 / N38 - lamellar magnet
Specification / characteristics - MPL 10x7x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020115 |
| GTIN/EAN | 5906301811213 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 10 mm [±0,1 mm] |
| Width | 7 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.58 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.02 kg / 19.82 N |
| Magnetic Induction ~ ? | 339.79 mT / 3398 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 |
Physical analysis of the magnet - report
Presented data are the outcome of a engineering analysis. Values were calculated on models for the class Nd2Fe14B. Operational parameters may differ from theoretical values. Use these data as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs distance) - interaction chart
MPL 10x7x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3396 Gs
339.6 mT
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
medium risk |
| 1 mm |
2727 Gs
272.7 mT
|
1.30 kg / 2.87 LBS
1303.2 g / 12.8 N
|
weak grip |
| 2 mm |
2053 Gs
205.3 mT
|
0.74 kg / 1.63 LBS
738.2 g / 7.2 N
|
weak grip |
| 3 mm |
1502 Gs
150.2 mT
|
0.40 kg / 0.87 LBS
395.2 g / 3.9 N
|
weak grip |
| 5 mm |
803 Gs
80.3 mT
|
0.11 kg / 0.25 LBS
113.0 g / 1.1 N
|
weak grip |
| 10 mm |
216 Gs
21.6 mT
|
0.01 kg / 0.02 LBS
8.2 g / 0.1 N
|
weak grip |
| 15 mm |
82 Gs
8.2 mT
|
0.00 kg / 0.00 LBS
1.2 g / 0.0 N
|
weak grip |
| 20 mm |
39 Gs
3.9 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
weak grip |
| 30 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding load (wall)
MPL 10x7x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.40 kg / 0.89 LBS
404.0 g / 4.0 N
|
| 1 mm | Stal (~0.2) |
0.26 kg / 0.57 LBS
260.0 g / 2.6 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 LBS
148.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.18 LBS
80.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
22.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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 10x7x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.61 kg / 1.34 LBS
606.0 g / 5.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.40 kg / 0.89 LBS
404.0 g / 4.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.20 kg / 0.45 LBS
202.0 g / 2.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.01 kg / 2.23 LBS
1010.0 g / 9.9 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 10x7x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.20 kg / 0.45 LBS
202.0 g / 2.0 N
|
| 1 mm |
|
0.51 kg / 1.11 LBS
505.0 g / 5.0 N
|
| 2 mm |
|
1.01 kg / 2.23 LBS
1010.0 g / 9.9 N
|
| 3 mm |
|
1.52 kg / 3.34 LBS
1515.0 g / 14.9 N
|
| 5 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 10 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 11 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
| 12 mm |
|
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 10x7x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.02 kg / 4.45 LBS
2020.0 g / 19.8 N
|
OK |
| 40 °C | -2.2% |
1.98 kg / 4.36 LBS
1975.6 g / 19.4 N
|
OK |
| 60 °C | -4.4% |
1.93 kg / 4.26 LBS
1931.1 g / 18.9 N
|
|
| 80 °C | -6.6% |
1.89 kg / 4.16 LBS
1886.7 g / 18.5 N
|
|
| 100 °C | -28.8% |
1.44 kg / 3.17 LBS
1438.2 g / 14.1 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 10x7x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.98 kg / 10.97 LBS
4 893 Gs
|
0.75 kg / 1.65 LBS
746 g / 7.3 N
|
N/A |
| 1 mm |
4.09 kg / 9.01 LBS
6 155 Gs
|
0.61 kg / 1.35 LBS
613 g / 6.0 N
|
3.68 kg / 8.11 LBS
~0 Gs
|
| 2 mm |
3.21 kg / 7.08 LBS
5 455 Gs
|
0.48 kg / 1.06 LBS
482 g / 4.7 N
|
2.89 kg / 6.37 LBS
~0 Gs
|
| 3 mm |
2.44 kg / 5.39 LBS
4 758 Gs
|
0.37 kg / 0.81 LBS
366 g / 3.6 N
|
2.20 kg / 4.85 LBS
~0 Gs
|
| 5 mm |
1.34 kg / 2.94 LBS
3 518 Gs
|
0.20 kg / 0.44 LBS
200 g / 2.0 N
|
1.20 kg / 2.65 LBS
~0 Gs
|
| 10 mm |
0.28 kg / 0.61 LBS
1 606 Gs
|
0.04 kg / 0.09 LBS
42 g / 0.4 N
|
0.25 kg / 0.55 LBS
~0 Gs
|
| 20 mm |
0.02 kg / 0.04 LBS
433 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
43 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
26 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
17 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
11 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
8 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
6 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (implants) - warnings
MPL 10x7x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 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) - warning
MPL 10x7x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.91 km/h
(6.92 m/s)
|
0.04 J | |
| 30 mm |
24.98 km/h
(6.94 m/s)
|
0.04 J | |
| 50 mm |
24.97 km/h
(6.94 m/s)
|
0.04 J | |
| 100 mm |
24.98 km/h
(6.94 m/s)
|
0.04 J |
Table 9: Corrosion resistance
MPL 10x7x3 / 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 10x7x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 480 Mx | 24.8 µWb |
| Pc Coefficient | 0.42 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 10x7x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.02 kg | Standard |
| Water (riverbed) |
2.31 kg
(+0.29 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: 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) significantly limits the holding force.
3. Thermal stability
*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) = 0.42
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also proposals
Advantages and disadvantages of rare earth magnets.
Strengths
- They retain full power for around ten years – the drop is just ~1% (in theory),
- They are extremely resistant to demagnetization induced by presence of other magnetic fields,
- Thanks to the elegant finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
- Magnetic induction on the working part of the magnet turns out to be exceptional,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to flexibility in forming and the ability to adapt to unusual requirements,
- Huge importance in modern technologies – they serve a role in computer drives, brushless drives, precision medical tools, as well as complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets decrease their power 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 durability even at temperatures up to 230°C
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complex forms in magnets, we recommend using casing - magnetic mechanism.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a plate made of mild steel, perfectly concentrating the magnetic flux
- possessing a thickness of min. 10 mm to avoid saturation
- with a surface perfectly flat
- with direct contact (without paint)
- under perpendicular force direction (90-degree angle)
- in temp. approx. 20°C
Determinants of practical lifting force of a magnet
- Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
- Material composition – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
- Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
- Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked on the plate surface 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 small distance between the magnet’s surface and the plate decreases the holding force.
Safety rules for work with neodymium magnets
Safe distance
Do not bring magnets close to a wallet, computer, or TV. The magnetism can destroy these devices and wipe information from cards.
Allergy Warning
Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact or select encased magnets.
GPS and phone interference
Note: neodymium magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.
Machining danger
Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
ICD Warning
For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Crushing risk
Watch your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Fragile material
Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.
Thermal limits
Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
Powerful field
Handle with care. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.
Do not give to children
Strictly store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.
