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 data - 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 |
Physical modeling of the magnet - data
The following data represent the outcome of a mathematical analysis. Results were calculated on models for the material Nd2Fe14B. Real-world conditions might slightly differ. Treat these data as a reference point when designing systems.
Table 1: Static force (pull 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
|
warning |
Table 2: Sliding load (vertical surface)
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 (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: Working in heat (stability) - thermal limit
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: Magnet-Magnet interaction (repulsion) - field range
MPL 200x30x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear 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) (implants) - 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: Impact energy (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: 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. Shear force
*Note: On a vertical surface, the magnet holds just ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*For N38 grade, the critical limit 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.
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% |
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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Strengths as well as weaknesses of rare earth magnets.
Benefits
- They do not lose strength, even after nearly ten years – the drop in lifting capacity is only ~1% (according to tests),
- They are resistant to demagnetization induced by external disturbances,
- In other words, due to the aesthetic layer of nickel, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual forming and modifying to atypical conditions,
- Universal use in electronics industry – they find application in mass storage devices, motor assemblies, medical equipment, and modern systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We recommend casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Additionally, small components of these devices are able to be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Maximum lifting capacity of the magnet – what contributes to it?
- on a base made of structural steel, effectively closing the magnetic field
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with an ideally smooth contact surface
- without any clearance between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at room temperature
Practical lifting capacity: influencing factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – note 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.
- Base massiveness – too thin plate does not close the flux, causing part of the flux to be wasted into the air.
- Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
- Surface condition – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
- Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Safety rules for work with NdFeB magnets
Warning for heart patients
People with a pacemaker should maintain an large gap from magnets. The magnetic field can stop the functioning of the implant.
GPS Danger
Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.
Data carriers
Intense magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.
Swallowing risk
Strictly store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.
Combustion hazard
Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.
Crushing force
Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.
Handling guide
Use magnets consciously. Their immense force can surprise even professionals. Be vigilant and respect their power.
Sensitization to coating
Medical facts indicate that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands or select versions in plastic housing.
Demagnetization risk
Keep cool. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, look for HT versions (H, SH, UH).
Protective goggles
Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets will cause them breaking into small pieces.
