MPL 200x30x30 / N38 - lamellar magnet
lamellar magnet
Catalog no 020125
GTIN/EAN: 5906301811312
length
200 mm [±0,1 mm]
Width
30 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
1350 g
Magnetization Direction
↑ axial
Load capacity
287.38 kg / 2819.19 N
Magnetic Induction
445.15 mT / 4451 Gs
Coating
[NiCuNi] Nickel
563.28 ZŁ with VAT / pcs + price for transport
457.95 ZŁ net + 23% VAT / pcs
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Physical properties - MPL 200x30x30 / N38 - lamellar magnet
Specification / characteristics - MPL 200x30x30 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020125 |
| GTIN/EAN | 5906301811312 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 200 mm [±0,1 mm] |
| Width | 30 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 1350 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 287.38 kg / 2819.19 N |
| Magnetic Induction ~ ? | 445.15 mT / 4451 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 |
Engineering simulation of the magnet - data
These values are the outcome of a mathematical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these calculations as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs distance) - characteristics
MPL 200x30x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4451 Gs
445.1 mT
|
287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N
|
crushing |
| 1 mm |
4241 Gs
424.1 mT
|
260.91 kg / 575.21 LBS
260910.0 g / 2559.5 N
|
crushing |
| 2 mm |
4028 Gs
402.8 mT
|
235.43 kg / 519.04 LBS
235433.0 g / 2309.6 N
|
crushing |
| 3 mm |
3818 Gs
381.8 mT
|
211.49 kg / 466.26 LBS
211490.2 g / 2074.7 N
|
crushing |
| 5 mm |
3412 Gs
341.2 mT
|
168.87 kg / 372.30 LBS
168870.4 g / 1656.6 N
|
crushing |
| 10 mm |
2539 Gs
253.9 mT
|
93.54 kg / 206.22 LBS
93539.2 g / 917.6 N
|
crushing |
| 15 mm |
1902 Gs
190.2 mT
|
52.48 kg / 115.70 LBS
52481.2 g / 514.8 N
|
crushing |
| 20 mm |
1457 Gs
145.7 mT
|
30.79 kg / 67.88 LBS
30789.8 g / 302.0 N
|
crushing |
| 30 mm |
920 Gs
92.0 mT
|
12.29 kg / 27.09 LBS
12288.2 g / 120.5 N
|
crushing |
| 50 mm |
456 Gs
45.6 mT
|
3.02 kg / 6.65 LBS
3016.4 g / 29.6 N
|
strong |
Table 2: Vertical hold (wall)
MPL 200x30x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
57.48 kg / 126.71 LBS
57476.0 g / 563.8 N
|
| 1 mm | Stal (~0.2) |
52.18 kg / 115.04 LBS
52182.0 g / 511.9 N
|
| 2 mm | Stal (~0.2) |
47.09 kg / 103.81 LBS
47086.0 g / 461.9 N
|
| 3 mm | Stal (~0.2) |
42.30 kg / 93.25 LBS
42298.0 g / 414.9 N
|
| 5 mm | Stal (~0.2) |
33.77 kg / 74.46 LBS
33774.0 g / 331.3 N
|
| 10 mm | Stal (~0.2) |
18.71 kg / 41.24 LBS
18708.0 g / 183.5 N
|
| 15 mm | Stal (~0.2) |
10.50 kg / 23.14 LBS
10496.0 g / 103.0 N
|
| 20 mm | Stal (~0.2) |
6.16 kg / 13.58 LBS
6158.0 g / 60.4 N
|
| 30 mm | Stal (~0.2) |
2.46 kg / 5.42 LBS
2458.0 g / 24.1 N
|
| 50 mm | Stal (~0.2) |
0.60 kg / 1.33 LBS
604.0 g / 5.9 N
|
Table 3: Vertical assembly (shearing) - vertical pull
MPL 200x30x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
86.21 kg / 190.07 LBS
86214.0 g / 845.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
57.48 kg / 126.71 LBS
57476.0 g / 563.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
28.74 kg / 63.36 LBS
28738.0 g / 281.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
143.69 kg / 316.78 LBS
143690.0 g / 1409.6 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 200x30x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
9.58 kg / 21.12 LBS
9579.3 g / 94.0 N
|
| 1 mm |
|
23.95 kg / 52.80 LBS
23948.3 g / 234.9 N
|
| 2 mm |
|
47.90 kg / 105.59 LBS
47896.7 g / 469.9 N
|
| 3 mm |
|
71.85 kg / 158.39 LBS
71845.0 g / 704.8 N
|
| 5 mm |
|
119.74 kg / 263.98 LBS
119741.7 g / 1174.7 N
|
| 10 mm |
|
239.48 kg / 527.97 LBS
239483.3 g / 2349.3 N
|
| 11 mm |
|
263.43 kg / 580.77 LBS
263431.7 g / 2584.3 N
|
| 12 mm |
|
287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N
|
Table 5: Thermal stability (stability) - power drop
MPL 200x30x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
287.38 kg / 633.56 LBS
287380.0 g / 2819.2 N
|
OK |
| 40 °C | -2.2% |
281.06 kg / 619.63 LBS
281057.6 g / 2757.2 N
|
OK |
| 60 °C | -4.4% |
274.74 kg / 605.69 LBS
274735.3 g / 2695.2 N
|
|
| 80 °C | -6.6% |
268.41 kg / 591.75 LBS
268412.9 g / 2633.1 N
|
|
| 100 °C | -28.8% |
204.61 kg / 451.10 LBS
204614.6 g / 2007.3 N
|
Table 6: Two magnets (repulsion) - field collision
MPL 200x30x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
732.71 kg / 1615.35 LBS
5 371 Gs
|
109.91 kg / 242.30 LBS
109907 g / 1078.2 N
|
N/A |
| 1 mm |
698.96 kg / 1540.95 LBS
8 694 Gs
|
104.84 kg / 231.14 LBS
104845 g / 1028.5 N
|
629.07 kg / 1386.85 LBS
~0 Gs
|
| 2 mm |
665.22 kg / 1466.57 LBS
8 481 Gs
|
99.78 kg / 219.99 LBS
99784 g / 978.9 N
|
598.70 kg / 1319.91 LBS
~0 Gs
|
| 3 mm |
632.29 kg / 1393.97 LBS
8 269 Gs
|
94.84 kg / 209.10 LBS
94844 g / 930.4 N
|
569.07 kg / 1254.57 LBS
~0 Gs
|
| 5 mm |
569.22 kg / 1254.92 LBS
7 846 Gs
|
85.38 kg / 188.24 LBS
85383 g / 837.6 N
|
512.30 kg / 1129.42 LBS
~0 Gs
|
| 10 mm |
430.56 kg / 949.22 LBS
6 823 Gs
|
64.58 kg / 142.38 LBS
64584 g / 633.6 N
|
387.50 kg / 854.29 LBS
~0 Gs
|
| 20 mm |
238.49 kg / 525.78 LBS
5 078 Gs
|
35.77 kg / 78.87 LBS
35774 g / 350.9 N
|
214.64 kg / 473.20 LBS
~0 Gs
|
| 50 mm |
48.45 kg / 106.82 LBS
2 289 Gs
|
7.27 kg / 16.02 LBS
7268 g / 71.3 N
|
43.61 kg / 96.13 LBS
~0 Gs
|
| 60 mm |
31.33 kg / 69.07 LBS
1 841 Gs
|
4.70 kg / 10.36 LBS
4700 g / 46.1 N
|
28.20 kg / 62.16 LBS
~0 Gs
|
| 70 mm |
21.09 kg / 46.49 LBS
1 510 Gs
|
3.16 kg / 6.97 LBS
3163 g / 31.0 N
|
18.98 kg / 41.84 LBS
~0 Gs
|
| 80 mm |
14.67 kg / 32.35 LBS
1 260 Gs
|
2.20 kg / 4.85 LBS
2201 g / 21.6 N
|
13.21 kg / 29.12 LBS
~0 Gs
|
| 90 mm |
10.50 kg / 23.15 LBS
1 066 Gs
|
1.58 kg / 3.47 LBS
1575 g / 15.5 N
|
9.45 kg / 20.83 LBS
~0 Gs
|
| 100 mm |
7.69 kg / 16.95 LBS
912 Gs
|
1.15 kg / 2.54 LBS
1154 g / 11.3 N
|
6.92 kg / 15.26 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 200x30x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 39.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 30.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 23.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 18.0 cm |
| Remote | 50 Gs (5.0 mT) | 16.5 cm |
| Payment card | 400 Gs (40.0 mT) | 5.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 4.5 cm |
Table 8: Collisions (kinetic energy) - warning
MPL 200x30x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
17.45 km/h
(4.85 m/s)
|
15.86 J | |
| 30 mm |
26.16 km/h
(7.27 m/s)
|
35.64 J | |
| 50 mm |
33.12 km/h
(9.20 m/s)
|
57.12 J | |
| 100 mm |
46.56 km/h
(12.93 m/s)
|
112.90 J |
Table 9: Surface protection spec
MPL 200x30x30 / 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 200x30x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 221 734 Mx | 2217.3 µWb |
| Pc Coefficient | 0.45 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 200x30x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 287.38 kg | Standard |
| Water (riverbed) |
329.05 kg
(+41.67 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) drastically limits the holding force.
3. Temperature resistance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.45
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Strengths and weaknesses of Nd2Fe14B magnets.
Benefits
- Their power remains stable, and after approximately 10 years it decreases only by ~1% (theoretically),
- Magnets perfectly defend themselves against demagnetization caused by foreign field sources,
- The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to the potential of accurate molding and adaptation to unique projects, neodymium magnets can be created in a broad palette of forms and dimensions, which makes them more universal,
- Wide application in innovative solutions – they are used in hard drives, brushless drives, advanced medical instruments, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in small systems
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 extremely resistant to heat
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in creating threads and complex forms in magnets, we recommend using a housing - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- on a base made of mild steel, optimally conducting the magnetic flux
- whose transverse dimension equals approx. 10 mm
- characterized by even structure
- under conditions of gap-free contact (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- at ambient temperature approx. 20 degrees Celsius
Practical aspects of lifting capacity – factors
- Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
- Direction of force – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be escaped to the other side.
- Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.
H&S for magnets
Crushing force
Protect your hands. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!
Fire risk
Powder generated during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
ICD Warning
For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.
Material brittleness
NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets leads to them cracking into small pieces.
Permanent damage
Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.
Magnetic interference
A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.
Electronic hazard
Very strong magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Do not underestimate power
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Swallowing risk
Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.
Skin irritation risks
A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to skin redness. We strongly advise use protective gloves.
