MPL 30x5x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020448
GTIN/EAN: 5906301811923
length
30 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
5.63 g
Magnetization Direction
↑ axial
Load capacity
7.03 kg / 68.96 N
Magnetic Induction
446.27 mT / 4463 Gs
Coating
[NiCuNi] Nickel
4.15 ZŁ with VAT / pcs + price for transport
3.37 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Pick up the phone and ask
+48 22 499 98 98
otherwise let us know by means of
our online form
our website.
Force and form of a magnet can be checked on our
our magnetic calculator.
Same-day processing for orders placed before 14:00.
Detailed specification - MPL 30x5x5 / N38 - lamellar magnet
Specification / characteristics - MPL 30x5x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020448 |
| GTIN/EAN | 5906301811923 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 5.63 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 7.03 kg / 68.96 N |
| Magnetic Induction ~ ? | 446.27 mT / 4463 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 |
Technical simulation of the magnet - data
The following data represent the direct effect of a physical analysis. Values are based on algorithms for the material Nd2Fe14B. Real-world parameters may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs gap) - characteristics
MPL 30x5x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4458 Gs
445.8 mT
|
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
medium risk |
| 1 mm |
3235 Gs
323.5 mT
|
3.70 kg / 8.16 lbs
3702.2 g / 36.3 N
|
medium risk |
| 2 mm |
2271 Gs
227.1 mT
|
1.82 kg / 4.02 lbs
1825.0 g / 17.9 N
|
weak grip |
| 3 mm |
1628 Gs
162.8 mT
|
0.94 kg / 2.07 lbs
937.0 g / 9.2 N
|
weak grip |
| 5 mm |
927 Gs
92.7 mT
|
0.30 kg / 0.67 lbs
304.2 g / 3.0 N
|
weak grip |
| 10 mm |
342 Gs
34.2 mT
|
0.04 kg / 0.09 lbs
41.4 g / 0.4 N
|
weak grip |
| 15 mm |
166 Gs
16.6 mT
|
0.01 kg / 0.02 lbs
9.7 g / 0.1 N
|
weak grip |
| 20 mm |
92 Gs
9.2 mT
|
0.00 kg / 0.01 lbs
3.0 g / 0.0 N
|
weak grip |
| 30 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
weak grip |
| 50 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical force (vertical surface)
MPL 30x5x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.41 kg / 3.10 lbs
1406.0 g / 13.8 N
|
| 1 mm | Stal (~0.2) |
0.74 kg / 1.63 lbs
740.0 g / 7.3 N
|
| 2 mm | Stal (~0.2) |
0.36 kg / 0.80 lbs
364.0 g / 3.6 N
|
| 3 mm | Stal (~0.2) |
0.19 kg / 0.41 lbs
188.0 g / 1.8 N
|
| 5 mm | Stal (~0.2) |
0.06 kg / 0.13 lbs
60.0 g / 0.6 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
8.0 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: Wall mounting (sliding) - vertical pull
MPL 30x5x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.11 kg / 4.65 lbs
2109.0 g / 20.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.41 kg / 3.10 lbs
1406.0 g / 13.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.70 kg / 1.55 lbs
703.0 g / 6.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.52 kg / 7.75 lbs
3515.0 g / 34.5 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x5x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.70 kg / 1.55 lbs
703.0 g / 6.9 N
|
| 1 mm |
|
1.76 kg / 3.87 lbs
1757.5 g / 17.2 N
|
| 2 mm |
|
3.52 kg / 7.75 lbs
3515.0 g / 34.5 N
|
| 3 mm |
|
5.27 kg / 11.62 lbs
5272.5 g / 51.7 N
|
| 5 mm |
|
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
| 10 mm |
|
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
| 11 mm |
|
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
| 12 mm |
|
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
Table 5: Thermal stability (stability) - power drop
MPL 30x5x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
7.03 kg / 15.50 lbs
7030.0 g / 69.0 N
|
OK |
| 40 °C | -2.2% |
6.88 kg / 15.16 lbs
6875.3 g / 67.4 N
|
OK |
| 60 °C | -4.4% |
6.72 kg / 14.82 lbs
6720.7 g / 65.9 N
|
|
| 80 °C | -6.6% |
6.57 kg / 14.48 lbs
6566.0 g / 64.4 N
|
|
| 100 °C | -28.8% |
5.01 kg / 11.03 lbs
5005.4 g / 49.1 N
|
Table 6: Two magnets (repulsion) - field range
MPL 30x5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
18.38 kg / 40.52 lbs
5 383 Gs
|
2.76 kg / 6.08 lbs
2757 g / 27.0 N
|
N/A |
| 1 mm |
13.60 kg / 29.99 lbs
7 670 Gs
|
2.04 kg / 4.50 lbs
2040 g / 20.0 N
|
12.24 kg / 26.99 lbs
~0 Gs
|
| 2 mm |
9.68 kg / 21.34 lbs
6 470 Gs
|
1.45 kg / 3.20 lbs
1452 g / 14.2 N
|
8.71 kg / 19.20 lbs
~0 Gs
|
| 3 mm |
6.79 kg / 14.97 lbs
5 419 Gs
|
1.02 kg / 2.25 lbs
1018 g / 10.0 N
|
6.11 kg / 13.47 lbs
~0 Gs
|
| 5 mm |
3.39 kg / 7.48 lbs
3 830 Gs
|
0.51 kg / 1.12 lbs
509 g / 5.0 N
|
3.05 kg / 6.73 lbs
~0 Gs
|
| 10 mm |
0.80 kg / 1.75 lbs
1 855 Gs
|
0.12 kg / 0.26 lbs
119 g / 1.2 N
|
0.72 kg / 1.58 lbs
~0 Gs
|
| 20 mm |
0.11 kg / 0.24 lbs
684 Gs
|
0.02 kg / 0.04 lbs
16 g / 0.2 N
|
0.10 kg / 0.21 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 lbs
111 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
72 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
49 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
34 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
25 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
19 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MPL 30x5x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (kinetic energy) - warning
MPL 30x5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
35.77 km/h
(9.94 m/s)
|
0.28 J | |
| 30 mm |
61.73 km/h
(17.15 m/s)
|
0.83 J | |
| 50 mm |
79.69 km/h
(22.14 m/s)
|
1.38 J | |
| 100 mm |
112.70 km/h
(31.30 m/s)
|
2.76 J |
Table 9: Anti-corrosion coating durability
MPL 30x5x5 / 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 30x5x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 700 Mx | 57.0 µWb |
| Pc Coefficient | 0.46 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 30x5x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 7.03 kg | Standard |
| Water (riverbed) |
8.05 kg
(+1.02 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical surface, the magnet holds just ~20% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Temperature resistance
*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) = 0.46
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 |
View more offers
Advantages and disadvantages of Nd2Fe14B magnets.
Benefits
- Their magnetic field is maintained, and after around 10 years it drops only by ~1% (according to research),
- They maintain their magnetic properties even under close interference source,
- A magnet with a smooth silver surface has better aesthetics,
- They show high magnetic induction at the operating surface, which increases their power,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to flexibility in forming and the ability to customize to client solutions,
- Wide application in modern industrial fields – they are commonly used in mass storage devices, motor assemblies, medical equipment, also complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- We recommend casing - magnetic holder, due to difficulties in producing threads inside the magnet and complicated forms.
- Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small components of these products can complicate diagnosis medical after entering the body.
- With mass production the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum lifting force for a neodymium magnet – what contributes to it?
- using a sheet made of mild steel, functioning as a ideal flux conductor
- with a cross-section minimum 10 mm
- characterized by even structure
- under conditions of no distance (surface-to-surface)
- under perpendicular force direction (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, 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 converting into lifting capacity.
- Steel grade – ideal substrate is high-permeability steel. Cast iron may attract less.
- Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Allergic reactions
Some people suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling can result in a rash. We suggest use safety gloves.
Hand protection
Pinching hazard: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Danger to the youngest
Only for adults. Small elements pose a choking risk, leading to serious injuries. Keep away from kids and pets.
Safe distance
Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.
Mechanical processing
Powder produced during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
Permanent damage
Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.
Do not underestimate power
Handle with care. Neodymium magnets attract from a distance and connect with massive power, often quicker than you can react.
Phone sensors
An intense magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Maintain magnets close to a device to prevent breaking the sensors.
Protective goggles
NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them breaking into small pieces.
Medical interference
Life threat: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
