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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Technical details - 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 |
Technical simulation of the product - technical parameters
Presented values constitute the direct effect of a mathematical calculation. Values are based on models for the material Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Please consider these data as a reference point during assembly planning.
Table 1: Static pull force (force vs distance) - interaction chart
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
|
dangerous! |
| 1 mm |
4241 Gs
424.1 mT
|
260.91 kg / 575.21 lbs
260910.0 g / 2559.5 N
|
dangerous! |
| 2 mm |
4028 Gs
402.8 mT
|
235.43 kg / 519.04 lbs
235433.0 g / 2309.6 N
|
dangerous! |
| 3 mm |
3818 Gs
381.8 mT
|
211.49 kg / 466.26 lbs
211490.2 g / 2074.7 N
|
dangerous! |
| 5 mm |
3412 Gs
341.2 mT
|
168.87 kg / 372.30 lbs
168870.4 g / 1656.6 N
|
dangerous! |
| 10 mm |
2539 Gs
253.9 mT
|
93.54 kg / 206.22 lbs
93539.2 g / 917.6 N
|
dangerous! |
| 15 mm |
1902 Gs
190.2 mT
|
52.48 kg / 115.70 lbs
52481.2 g / 514.8 N
|
dangerous! |
| 20 mm |
1457 Gs
145.7 mT
|
30.79 kg / 67.88 lbs
30789.8 g / 302.0 N
|
dangerous! |
| 30 mm |
920 Gs
92.0 mT
|
12.29 kg / 27.09 lbs
12288.2 g / 120.5 N
|
dangerous! |
| 50 mm |
456 Gs
45.6 mT
|
3.02 kg / 6.65 lbs
3016.4 g / 29.6 N
|
strong |
Table 2: Sliding 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: Wall mounting (sliding) - 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 (substrate influence) - power losses
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 resistance (stability) - resistance threshold
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 (attraction) - field collision
MPL 200x30x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Protective zones (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 23.5 cm |
| Mobile device | 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: Dynamics (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: Coating parameters (durability)
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: Construction data (Flux)
MPL 200x30x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 221 734 Mx | 2217.3 µWb |
| Pc Coefficient | 0.45 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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)
*Warning: On a vertical wall, the magnet retains just ~20% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) drastically reduces the holding force.
3. Temperature resistance
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.45
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.
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% |
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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Pros and cons of rare earth magnets.
Advantages
- They have stable power, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
- Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external magnetic fields,
- In other words, due to the glossy layer of gold, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to the possibility of flexible forming and adaptation to custom requirements, magnetic components can be modeled in a variety of shapes and sizes, which makes them more universal,
- Significant place in modern industrial fields – they are used in HDD drives, electric drive systems, advanced medical instruments, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in miniature devices
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 protecting against moisture
- We recommend casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products can disrupt the diagnostic process medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum magnetic pulling force – what contributes to it?
- with the contact of a yoke made of special test steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to avoid saturation
- with an polished contact surface
- with direct contact (without impurities)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
Practical aspects of lifting capacity – factors
- Clearance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
- Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Do not overheat magnets
Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Impact on smartphones
Navigation devices and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.
Safe operation
Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.
Magnets are brittle
Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Nickel coating and allergies
Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, refrain from direct skin contact and choose encased magnets.
Combustion hazard
Combustion risk: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.
Danger to pacemakers
Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
No play value
Product intended for adults. Small elements can be swallowed, leading to serious injuries. Keep out of reach of children and animals.
Bodily injuries
Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!
Threat to electronics
Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).
