MPL 30x20x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020141
GTIN/EAN: 5906301811473
length
30 mm [±0,1 mm]
Width
20 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
45 g
Magnetization Direction
↑ axial
Load capacity
19.53 kg / 191.55 N
Magnetic Induction
371.57 mT / 3716 Gs
Coating
[NiCuNi] Nickel
16.11 ZŁ with VAT / pcs + price for transport
13.10 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 30x20x10 / N38 - lamellar magnet
Specification / characteristics - MPL 30x20x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020141 |
| GTIN/EAN | 5906301811473 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 20 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 45 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 19.53 kg / 191.55 N |
| Magnetic Induction ~ ? | 371.57 mT / 3716 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 product - report
Presented information constitute the outcome of a mathematical calculation. Values are based on algorithms for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Please consider these data as a reference point for designers.
Table 1: Static force (force vs gap) - interaction chart
MPL 30x20x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3715 Gs
371.5 mT
|
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
|
dangerous! |
| 1 mm |
3464 Gs
346.4 mT
|
16.98 kg / 37.44 pounds
16983.1 g / 166.6 N
|
dangerous! |
| 2 mm |
3197 Gs
319.7 mT
|
14.47 kg / 31.89 pounds
14466.6 g / 141.9 N
|
dangerous! |
| 3 mm |
2927 Gs
292.7 mT
|
12.12 kg / 26.73 pounds
12123.3 g / 118.9 N
|
dangerous! |
| 5 mm |
2408 Gs
240.8 mT
|
8.21 kg / 18.10 pounds
8207.8 g / 80.5 N
|
strong |
| 10 mm |
1411 Gs
141.1 mT
|
2.82 kg / 6.21 pounds
2815.6 g / 27.6 N
|
strong |
| 15 mm |
832 Gs
83.2 mT
|
0.98 kg / 2.16 pounds
979.7 g / 9.6 N
|
low risk |
| 20 mm |
512 Gs
51.2 mT
|
0.37 kg / 0.82 pounds
371.2 g / 3.6 N
|
low risk |
| 30 mm |
224 Gs
22.4 mT
|
0.07 kg / 0.16 pounds
70.7 g / 0.7 N
|
low risk |
| 50 mm |
65 Gs
6.5 mT
|
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
low risk |
Table 2: Slippage force (vertical surface)
MPL 30x20x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
3.91 kg / 8.61 pounds
3906.0 g / 38.3 N
|
| 1 mm | Stal (~0.2) |
3.40 kg / 7.49 pounds
3396.0 g / 33.3 N
|
| 2 mm | Stal (~0.2) |
2.89 kg / 6.38 pounds
2894.0 g / 28.4 N
|
| 3 mm | Stal (~0.2) |
2.42 kg / 5.34 pounds
2424.0 g / 23.8 N
|
| 5 mm | Stal (~0.2) |
1.64 kg / 3.62 pounds
1642.0 g / 16.1 N
|
| 10 mm | Stal (~0.2) |
0.56 kg / 1.24 pounds
564.0 g / 5.5 N
|
| 15 mm | Stal (~0.2) |
0.20 kg / 0.43 pounds
196.0 g / 1.9 N
|
| 20 mm | Stal (~0.2) |
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
|
| 30 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
Table 3: Vertical assembly (shearing) - vertical pull
MPL 30x20x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
5.86 kg / 12.92 pounds
5859.0 g / 57.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
3.91 kg / 8.61 pounds
3906.0 g / 38.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.95 kg / 4.31 pounds
1953.0 g / 19.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
9.77 kg / 21.53 pounds
9765.0 g / 95.8 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 30x20x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.98 kg / 2.15 pounds
976.5 g / 9.6 N
|
| 1 mm |
|
2.44 kg / 5.38 pounds
2441.3 g / 23.9 N
|
| 2 mm |
|
4.88 kg / 10.76 pounds
4882.5 g / 47.9 N
|
| 3 mm |
|
7.32 kg / 16.15 pounds
7323.8 g / 71.8 N
|
| 5 mm |
|
12.21 kg / 26.91 pounds
12206.3 g / 119.7 N
|
| 10 mm |
|
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
|
| 11 mm |
|
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
|
| 12 mm |
|
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 30x20x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
19.53 kg / 43.06 pounds
19530.0 g / 191.6 N
|
OK |
| 40 °C | -2.2% |
19.10 kg / 42.11 pounds
19100.3 g / 187.4 N
|
OK |
| 60 °C | -4.4% |
18.67 kg / 41.16 pounds
18670.7 g / 183.2 N
|
|
| 80 °C | -6.6% |
18.24 kg / 40.21 pounds
18241.0 g / 178.9 N
|
|
| 100 °C | -28.8% |
13.91 kg / 30.66 pounds
13905.4 g / 136.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 30x20x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
51.05 kg / 112.54 pounds
5 124 Gs
|
7.66 kg / 16.88 pounds
7657 g / 75.1 N
|
N/A |
| 1 mm |
47.76 kg / 105.28 pounds
7 186 Gs
|
7.16 kg / 15.79 pounds
7163 g / 70.3 N
|
42.98 kg / 94.76 pounds
~0 Gs
|
| 2 mm |
44.39 kg / 97.86 pounds
6 928 Gs
|
6.66 kg / 14.68 pounds
6658 g / 65.3 N
|
39.95 kg / 88.08 pounds
~0 Gs
|
| 3 mm |
41.06 kg / 90.52 pounds
6 663 Gs
|
6.16 kg / 13.58 pounds
6159 g / 60.4 N
|
36.95 kg / 81.47 pounds
~0 Gs
|
| 5 mm |
34.68 kg / 76.45 pounds
6 124 Gs
|
5.20 kg / 11.47 pounds
5202 g / 51.0 N
|
31.21 kg / 68.81 pounds
~0 Gs
|
| 10 mm |
21.45 kg / 47.30 pounds
4 817 Gs
|
3.22 kg / 7.09 pounds
3218 g / 31.6 N
|
19.31 kg / 42.57 pounds
~0 Gs
|
| 20 mm |
7.36 kg / 16.22 pounds
2 821 Gs
|
1.10 kg / 2.43 pounds
1104 g / 10.8 N
|
6.62 kg / 14.60 pounds
~0 Gs
|
| 50 mm |
0.40 kg / 0.89 pounds
662 Gs
|
0.06 kg / 0.13 pounds
61 g / 0.6 N
|
0.36 kg / 0.80 pounds
~0 Gs
|
| 60 mm |
0.18 kg / 0.41 pounds
447 Gs
|
0.03 kg / 0.06 pounds
28 g / 0.3 N
|
0.17 kg / 0.37 pounds
~0 Gs
|
| 70 mm |
0.09 kg / 0.20 pounds
314 Gs
|
0.01 kg / 0.03 pounds
14 g / 0.1 N
|
0.08 kg / 0.18 pounds
~0 Gs
|
| 80 mm |
0.05 kg / 0.11 pounds
228 Gs
|
0.01 kg / 0.02 pounds
7 g / 0.1 N
|
0.04 kg / 0.10 pounds
~0 Gs
|
| 90 mm |
0.03 kg / 0.06 pounds
170 Gs
|
0.00 kg / 0.01 pounds
4 g / 0.0 N
|
0.02 kg / 0.05 pounds
~0 Gs
|
| 100 mm |
0.02 kg / 0.03 pounds
130 Gs
|
0.00 kg / 0.01 pounds
2 g / 0.0 N
|
0.01 kg / 0.03 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 30x20x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 13.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 10.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 8.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 6.5 cm |
| Remote | 50 Gs (5.0 mT) | 6.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x20x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.82 km/h
(6.34 m/s)
|
0.90 J | |
| 30 mm |
36.47 km/h
(10.13 m/s)
|
2.31 J | |
| 50 mm |
46.99 km/h
(13.05 m/s)
|
3.83 J | |
| 100 mm |
66.44 km/h
(18.46 m/s)
|
7.66 J |
Table 9: Coating parameters (durability)
MPL 30x20x10 / 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 (Pc)
MPL 30x20x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 22 801 Mx | 228.0 µWb |
| Pc Coefficient | 0.46 | Low (Flat) |
Table 11: Submerged application
MPL 30x20x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 19.53 kg | Standard |
| Water (riverbed) |
22.36 kg
(+2.83 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) significantly weakens 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
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.
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 |
Other offers
Advantages and disadvantages of neodymium magnets.
Pros
- They retain attractive force for around ten years – the drop is just ~1% (based on simulations),
- They retain their magnetic properties even under close interference source,
- The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to look better,
- Magnets are distinguished by exceptionally strong magnetic induction on the active area,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of custom shaping and adjusting to precise needs,
- Significant place in high-tech industry – they find application in data components, electromotive mechanisms, medical equipment, as well as other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in miniature devices
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 very resistant to heat
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
- Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Maximum magnetic pulling force – what contributes to it?
- with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness reaches at least 10 mm
- with a surface cleaned and smooth
- under conditions of no distance (metal-to-metal)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Surface condition – ground elements guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.
Safety rules for work with neodymium magnets
Heat warning
Keep cool. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).
Life threat
Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Immense force
Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Magnet fragility
Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. We recommend safety glasses.
Crushing force
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.
Mechanical processing
Dust produced during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
Avoid contact if allergic
Studies show that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent touching magnets with bare hands and select coated magnets.
Keep away from computers
Data protection: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, timepieces).
GPS and phone interference
Remember: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your mobile, tablet, and GPS.
Keep away from children
Product intended for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of children and animals.
