MPL 12x10x4 / N38 - lamellar magnet
lamellar magnet
Catalog no 020118
GTIN/EAN: 5906301811244
length
12 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
3.6 g
Magnetization Direction
↑ axial
Load capacity
3.45 kg / 33.88 N
Magnetic Induction
340.59 mT / 3406 Gs
Coating
[NiCuNi] Nickel
1.697 ZŁ with VAT / pcs + price for transport
1.380 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - MPL 12x10x4 / N38 - lamellar magnet
Specification / characteristics - MPL 12x10x4 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020118 |
| GTIN/EAN | 5906301811244 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 12 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 3.6 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.45 kg / 33.88 N |
| Magnetic Induction ~ ? | 340.59 mT / 3406 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 |
Physical simulation of the assembly - data
Presented values are the result of a physical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs gap) - characteristics
MPL 12x10x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3404 Gs
340.4 mT
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
warning |
| 1 mm |
2920 Gs
292.0 mT
|
2.54 kg / 5.60 lbs
2538.8 g / 24.9 N
|
warning |
| 2 mm |
2399 Gs
239.9 mT
|
1.71 kg / 3.78 lbs
1713.7 g / 16.8 N
|
safe |
| 3 mm |
1919 Gs
191.9 mT
|
1.10 kg / 2.42 lbs
1096.3 g / 10.8 N
|
safe |
| 5 mm |
1190 Gs
119.0 mT
|
0.42 kg / 0.93 lbs
421.6 g / 4.1 N
|
safe |
| 10 mm |
392 Gs
39.2 mT
|
0.05 kg / 0.10 lbs
45.7 g / 0.4 N
|
safe |
| 15 mm |
162 Gs
16.2 mT
|
0.01 kg / 0.02 lbs
7.8 g / 0.1 N
|
safe |
| 20 mm |
80 Gs
8.0 mT
|
0.00 kg / 0.00 lbs
1.9 g / 0.0 N
|
safe |
| 30 mm |
27 Gs
2.7 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
safe |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Slippage hold (wall)
MPL 12x10x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.69 kg / 1.52 lbs
690.0 g / 6.8 N
|
| 1 mm | Stal (~0.2) |
0.51 kg / 1.12 lbs
508.0 g / 5.0 N
|
| 2 mm | Stal (~0.2) |
0.34 kg / 0.75 lbs
342.0 g / 3.4 N
|
| 3 mm | Stal (~0.2) |
0.22 kg / 0.49 lbs
220.0 g / 2.2 N
|
| 5 mm | Stal (~0.2) |
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
10.0 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) - behavior on slippery surfaces
MPL 12x10x4 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.04 kg / 2.28 lbs
1035.0 g / 10.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.69 kg / 1.52 lbs
690.0 g / 6.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.35 kg / 0.76 lbs
345.0 g / 3.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.73 kg / 3.80 lbs
1725.0 g / 16.9 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 12x10x4 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.35 kg / 0.76 lbs
345.0 g / 3.4 N
|
| 1 mm |
|
0.86 kg / 1.90 lbs
862.5 g / 8.5 N
|
| 2 mm |
|
1.73 kg / 3.80 lbs
1725.0 g / 16.9 N
|
| 3 mm |
|
2.59 kg / 5.70 lbs
2587.5 g / 25.4 N
|
| 5 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 10 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 11 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 12 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
Table 5: Thermal stability (stability) - thermal limit
MPL 12x10x4 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
OK |
| 40 °C | -2.2% |
3.37 kg / 7.44 lbs
3374.1 g / 33.1 N
|
OK |
| 60 °C | -4.4% |
3.30 kg / 7.27 lbs
3298.2 g / 32.4 N
|
|
| 80 °C | -6.6% |
3.22 kg / 7.10 lbs
3222.3 g / 31.6 N
|
|
| 100 °C | -28.8% |
2.46 kg / 5.42 lbs
2456.4 g / 24.1 N
|
Table 6: Two magnets (attraction) - field range
MPL 12x10x4 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.57 kg / 18.90 lbs
4 915 Gs
|
1.29 kg / 2.84 lbs
1286 g / 12.6 N
|
N/A |
| 1 mm |
7.46 kg / 16.44 lbs
6 349 Gs
|
1.12 kg / 2.47 lbs
1118 g / 11.0 N
|
6.71 kg / 14.79 lbs
~0 Gs
|
| 2 mm |
6.31 kg / 13.91 lbs
5 841 Gs
|
0.95 kg / 2.09 lbs
946 g / 9.3 N
|
5.68 kg / 12.52 lbs
~0 Gs
|
| 3 mm |
5.23 kg / 11.53 lbs
5 317 Gs
|
0.78 kg / 1.73 lbs
784 g / 7.7 N
|
4.71 kg / 10.37 lbs
~0 Gs
|
| 5 mm |
3.42 kg / 7.55 lbs
4 302 Gs
|
0.51 kg / 1.13 lbs
513 g / 5.0 N
|
3.08 kg / 6.79 lbs
~0 Gs
|
| 10 mm |
1.05 kg / 2.31 lbs
2 380 Gs
|
0.16 kg / 0.35 lbs
157 g / 1.5 N
|
0.94 kg / 2.08 lbs
~0 Gs
|
| 20 mm |
0.11 kg / 0.25 lbs
784 Gs
|
0.02 kg / 0.04 lbs
17 g / 0.2 N
|
0.10 kg / 0.23 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
90 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
55 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
36 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
25 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
18 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
13 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (electronics) - warnings
MPL 12x10x4 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 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 12x10x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
31.48 km/h
(8.74 m/s)
|
0.14 J | |
| 30 mm |
54.08 km/h
(15.02 m/s)
|
0.41 J | |
| 50 mm |
69.81 km/h
(19.39 m/s)
|
0.68 J | |
| 100 mm |
98.73 km/h
(27.42 m/s)
|
1.35 J |
Table 9: Coating parameters (durability)
MPL 12x10x4 / 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 (Flux)
MPL 12x10x4 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 295 Mx | 42.9 µWb |
| Pc Coefficient | 0.43 | Low (Flat) |
Table 11: Submerged application
MPL 12x10x4 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.45 kg | Standard |
| Water (riverbed) |
3.95 kg
(+0.50 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Thermal stability
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.43
This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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% |
Environmental data
| 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 rare earth magnets.
Benefits
- Their strength is durable, and after around ten years it drops only by ~1% (theoretically),
- Neodymium magnets are extremely resistant to loss of magnetic properties caused by external magnetic fields,
- Thanks to the smooth finish, the coating of nickel, gold-plated, or silver-plated gives an elegant appearance,
- Magnets are characterized by very high magnetic induction on the outer layer,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
- Thanks to modularity in shaping and the ability to adapt to individual projects,
- Wide application in innovative solutions – they find application in mass storage devices, electric motors, medical equipment, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Cons
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing nuts and complicated forms in magnets, we recommend using cover - magnetic mount.
- Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to complicate diagnosis medical when they are in the body.
- Due to neodymium price, their price exceeds standard values,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the contact of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
- possessing a massiveness of at least 10 mm to avoid saturation
- with an polished contact surface
- without any clearance between the magnet and steel
- during pulling in a direction vertical to the plane
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
- Base massiveness – too thin steel does not close the flux, causing part of the power to be lost into the air.
- Material type – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
- Plate texture – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Powerful field
Use magnets consciously. Their huge power can surprise even professionals. Stay alert and do not underestimate their power.
Precision electronics
Remember: rare earth magnets generate a field that interferes with precision electronics. Keep a safe distance from your phone, device, and GPS.
Product not for children
Strictly store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are fatal.
Bone fractures
Big blocks can smash fingers in a fraction of a second. Never put your hand between two attracting surfaces.
Machining danger
Powder produced during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Life threat
Warning for patients: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.
Protect data
Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Warning for allergy sufferers
Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands or opt for versions in plastic housing.
Demagnetization risk
Watch the temperature. Heating the magnet to high heat will destroy its properties and pulling force.
Material brittleness
NdFeB magnets are sintered ceramics, which means they are fragile like glass. Collision of two magnets will cause them shattering into small pieces.
