MPL 30x15x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020389
GTIN/EAN: 5906301811886
length
30 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
33.75 g
Magnetization Direction
↑ axial
Load capacity
16.84 kg / 165.22 N
Magnetic Induction
413.45 mT / 4135 Gs
Coating
[NiCuNi] Nickel
24.48 ZŁ with VAT / pcs + price for transport
19.90 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 888 99 98 98
or drop us a message via
form
the contact page.
Strength and appearance of magnetic components can be reviewed using our
online calculation tool.
Orders placed before 14:00 will be shipped the same business day.
Technical - MPL 30x15x10 / N38 - lamellar magnet
Specification / characteristics - MPL 30x15x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020389 |
| GTIN/EAN | 5906301811886 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 33.75 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 16.84 kg / 165.22 N |
| Magnetic Induction ~ ? | 413.45 mT / 4135 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 analysis of the assembly - technical parameters
Presented data are the outcome of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.
Table 1: Static force (force vs distance) - power drop
MPL 30x15x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4133 Gs
413.3 mT
|
16.84 kg / 37.13 LBS
16840.0 g / 165.2 N
|
dangerous! |
| 1 mm |
3754 Gs
375.4 mT
|
13.89 kg / 30.62 LBS
13889.5 g / 136.3 N
|
dangerous! |
| 2 mm |
3365 Gs
336.5 mT
|
11.16 kg / 24.60 LBS
11159.2 g / 109.5 N
|
dangerous! |
| 3 mm |
2988 Gs
298.8 mT
|
8.80 kg / 19.41 LBS
8803.6 g / 86.4 N
|
medium risk |
| 5 mm |
2321 Gs
232.1 mT
|
5.31 kg / 11.71 LBS
5309.9 g / 52.1 N
|
medium risk |
| 10 mm |
1225 Gs
122.5 mT
|
1.48 kg / 3.26 LBS
1480.1 g / 14.5 N
|
safe |
| 15 mm |
684 Gs
68.4 mT
|
0.46 kg / 1.02 LBS
461.6 g / 4.5 N
|
safe |
| 20 mm |
409 Gs
40.9 mT
|
0.16 kg / 0.36 LBS
164.8 g / 1.6 N
|
safe |
| 30 mm |
173 Gs
17.3 mT
|
0.03 kg / 0.07 LBS
29.6 g / 0.3 N
|
safe |
| 50 mm |
50 Gs
5.0 mT
|
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
|
safe |
Table 2: Shear load (wall)
MPL 30x15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
3.37 kg / 7.43 LBS
3368.0 g / 33.0 N
|
| 1 mm | Stal (~0.2) |
2.78 kg / 6.12 LBS
2778.0 g / 27.3 N
|
| 2 mm | Stal (~0.2) |
2.23 kg / 4.92 LBS
2232.0 g / 21.9 N
|
| 3 mm | Stal (~0.2) |
1.76 kg / 3.88 LBS
1760.0 g / 17.3 N
|
| 5 mm | Stal (~0.2) |
1.06 kg / 2.34 LBS
1062.0 g / 10.4 N
|
| 10 mm | Stal (~0.2) |
0.30 kg / 0.65 LBS
296.0 g / 2.9 N
|
| 15 mm | Stal (~0.2) |
0.09 kg / 0.20 LBS
92.0 g / 0.9 N
|
| 20 mm | Stal (~0.2) |
0.03 kg / 0.07 LBS
32.0 g / 0.3 N
|
| 30 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 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 30x15x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
5.05 kg / 11.14 LBS
5052.0 g / 49.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
3.37 kg / 7.43 LBS
3368.0 g / 33.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.68 kg / 3.71 LBS
1684.0 g / 16.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
8.42 kg / 18.56 LBS
8420.0 g / 82.6 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 30x15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.84 kg / 1.86 LBS
842.0 g / 8.3 N
|
| 1 mm |
|
2.11 kg / 4.64 LBS
2105.0 g / 20.7 N
|
| 2 mm |
|
4.21 kg / 9.28 LBS
4210.0 g / 41.3 N
|
| 3 mm |
|
6.31 kg / 13.92 LBS
6315.0 g / 62.0 N
|
| 5 mm |
|
10.53 kg / 23.20 LBS
10525.0 g / 103.3 N
|
| 10 mm |
|
16.84 kg / 37.13 LBS
16840.0 g / 165.2 N
|
| 11 mm |
|
16.84 kg / 37.13 LBS
16840.0 g / 165.2 N
|
| 12 mm |
|
16.84 kg / 37.13 LBS
16840.0 g / 165.2 N
|
Table 5: Thermal resistance (stability) - power drop
MPL 30x15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
16.84 kg / 37.13 LBS
16840.0 g / 165.2 N
|
OK |
| 40 °C | -2.2% |
16.47 kg / 36.31 LBS
16469.5 g / 161.6 N
|
OK |
| 60 °C | -4.4% |
16.10 kg / 35.49 LBS
16099.0 g / 157.9 N
|
|
| 80 °C | -6.6% |
15.73 kg / 34.68 LBS
15728.6 g / 154.3 N
|
|
| 100 °C | -28.8% |
11.99 kg / 26.43 LBS
11990.1 g / 117.6 N
|
Table 6: Two magnets (attraction) - forces in the system
MPL 30x15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
47.39 kg / 104.48 LBS
5 357 Gs
|
7.11 kg / 15.67 LBS
7109 g / 69.7 N
|
N/A |
| 1 mm |
43.23 kg / 95.30 LBS
7 895 Gs
|
6.48 kg / 14.29 LBS
6484 g / 63.6 N
|
38.90 kg / 85.77 LBS
~0 Gs
|
| 2 mm |
39.09 kg / 86.17 LBS
7 507 Gs
|
5.86 kg / 12.93 LBS
5863 g / 57.5 N
|
35.18 kg / 77.56 LBS
~0 Gs
|
| 3 mm |
35.13 kg / 77.45 LBS
7 117 Gs
|
5.27 kg / 11.62 LBS
5270 g / 51.7 N
|
31.62 kg / 69.70 LBS
~0 Gs
|
| 5 mm |
27.95 kg / 61.61 LBS
6 348 Gs
|
4.19 kg / 9.24 LBS
4192 g / 41.1 N
|
25.15 kg / 55.45 LBS
~0 Gs
|
| 10 mm |
14.94 kg / 32.94 LBS
4 642 Gs
|
2.24 kg / 4.94 LBS
2242 g / 22.0 N
|
13.45 kg / 29.65 LBS
~0 Gs
|
| 20 mm |
4.17 kg / 9.18 LBS
2 451 Gs
|
0.62 kg / 1.38 LBS
625 g / 6.1 N
|
3.75 kg / 8.26 LBS
~0 Gs
|
| 50 mm |
0.19 kg / 0.41 LBS
519 Gs
|
0.03 kg / 0.06 LBS
28 g / 0.3 N
|
0.17 kg / 0.37 LBS
~0 Gs
|
| 60 mm |
0.08 kg / 0.18 LBS
347 Gs
|
0.01 kg / 0.03 LBS
13 g / 0.1 N
|
0.08 kg / 0.17 LBS
~0 Gs
|
| 70 mm |
0.04 kg / 0.09 LBS
242 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.04 kg / 0.08 LBS
~0 Gs
|
| 80 mm |
0.02 kg / 0.05 LBS
175 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 90 mm |
0.01 kg / 0.03 LBS
130 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.02 LBS
~0 Gs
|
| 100 mm |
0.01 kg / 0.02 LBS
99 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 30x15x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 12.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Collisions (cracking risk) - warning
MPL 30x15x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.73 km/h
(6.59 m/s)
|
0.73 J | |
| 30 mm |
39.06 km/h
(10.85 m/s)
|
1.99 J | |
| 50 mm |
50.38 km/h
(13.99 m/s)
|
3.30 J | |
| 100 mm |
71.24 km/h
(19.79 m/s)
|
6.61 J |
Table 9: Corrosion resistance
MPL 30x15x10 / 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 30x15x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 18 390 Mx | 183.9 µWb |
| Pc Coefficient | 0.52 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 30x15x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 16.84 kg | Standard |
| Water (riverbed) |
19.28 kg
(+2.44 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical surface, the magnet holds just a fraction of its max power.
2. Steel thickness impact
*Thin steel (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.52
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.
Elemental analysis
| 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 products
Strengths and weaknesses of neodymium magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- They maintain their magnetic properties even under strong external field,
- By covering with a lustrous coating of silver, the element gains an aesthetic look,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Thanks to freedom in designing and the capacity to customize to individual projects,
- Key role in advanced technology sectors – they find application in computer drives, motor assemblies, diagnostic systems, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems
Cons
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- 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.
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing nuts and complex forms in magnets, we propose using a housing - magnetic mount.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these magnets can complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- using a sheet made of high-permeability steel, acting as a circuit closing element
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- characterized by even structure
- under conditions of no distance (metal-to-metal)
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Determinants of lifting force in real conditions
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
- Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
- Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures 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, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safe handling of neodymium magnets
Skin irritation risks
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop handling magnets and wear gloves.
Do not drill into magnets
Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Do not underestimate power
Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
GPS and phone interference
Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your mobile, device, and GPS.
Keep away from computers
Data protection: Strong magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).
Fragile material
Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.
Swallowing risk
Strictly keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.
Crushing risk
Watch your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying anything in their path. Exercise extreme caution!
Do not overheat magnets
Keep cool. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).
Life threat
Individuals with a ICD have to maintain an absolute distance from magnets. The magnetism can stop the operation of the implant.
