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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
457.95 zł net / pcs
563.28 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
How much will a block magnet really hold?
What is the maximum working temperature?
What safety factor should I allow?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
Call us now
+48 888 99 98 98
alternatively let us know using
contact form
the contact section.
Specifications and structure of a neodymium magnet can be estimated using our
power calculator.
Order by 14:00 and we’ll ship today!
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 | 310 | °C |
| Curie Temperature TF | 590 | °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 assembly - technical parameters
Presented data are the result of a engineering analysis. Results rely on models for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static 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 pounds
287380.0 g / 2819.2 N
|
dangerous! |
| 1 mm |
4241 Gs
424.1 mT
|
260.91 kg / 575.21 pounds
260910.0 g / 2559.5 N
|
dangerous! |
| 2 mm |
4028 Gs
402.8 mT
|
235.43 kg / 519.04 pounds
235433.0 g / 2309.6 N
|
dangerous! |
| 3 mm |
3818 Gs
381.8 mT
|
211.49 kg / 466.26 pounds
211490.2 g / 2074.7 N
|
dangerous! |
| 5 mm |
3412 Gs
341.2 mT
|
168.87 kg / 372.30 pounds
168870.4 g / 1656.6 N
|
dangerous! |
| 10 mm |
2539 Gs
253.9 mT
|
93.54 kg / 206.22 pounds
93539.2 g / 917.6 N
|
dangerous! |
| 15 mm |
1902 Gs
190.2 mT
|
52.48 kg / 115.70 pounds
52481.2 g / 514.8 N
|
dangerous! |
| 20 mm |
1457 Gs
145.7 mT
|
30.79 kg / 67.88 pounds
30789.8 g / 302.0 N
|
dangerous! |
| 30 mm |
920 Gs
92.0 mT
|
12.29 kg / 27.09 pounds
12288.2 g / 120.5 N
|
dangerous! |
| 50 mm |
456 Gs
45.6 mT
|
3.02 kg / 6.65 pounds
3016.4 g / 29.6 N
|
warning |
Table 2: Vertical force (wall)
MPL 200x30x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
57.48 kg / 126.71 pounds
57476.0 g / 563.8 N
|
| 1 mm | Stal (~0.2) |
52.18 kg / 115.04 pounds
52182.0 g / 511.9 N
|
| 2 mm | Stal (~0.2) |
47.09 kg / 103.81 pounds
47086.0 g / 461.9 N
|
| 3 mm | Stal (~0.2) |
42.30 kg / 93.25 pounds
42298.0 g / 414.9 N
|
| 5 mm | Stal (~0.2) |
33.77 kg / 74.46 pounds
33774.0 g / 331.3 N
|
| 10 mm | Stal (~0.2) |
18.71 kg / 41.24 pounds
18708.0 g / 183.5 N
|
| 15 mm | Stal (~0.2) |
10.50 kg / 23.14 pounds
10496.0 g / 103.0 N
|
| 20 mm | Stal (~0.2) |
6.16 kg / 13.58 pounds
6158.0 g / 60.4 N
|
| 30 mm | Stal (~0.2) |
2.46 kg / 5.42 pounds
2458.0 g / 24.1 N
|
| 50 mm | Stal (~0.2) |
0.60 kg / 1.33 pounds
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 pounds
86214.0 g / 845.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
57.48 kg / 126.71 pounds
57476.0 g / 563.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
28.74 kg / 63.36 pounds
28738.0 g / 281.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
143.69 kg / 316.78 pounds
143690.0 g / 1409.6 N
|
Table 4: Material efficiency (substrate influence) - 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 pounds
9579.3 g / 94.0 N
|
| 1 mm |
|
23.95 kg / 52.80 pounds
23948.3 g / 234.9 N
|
| 2 mm |
|
47.90 kg / 105.59 pounds
47896.7 g / 469.9 N
|
| 3 mm |
|
71.85 kg / 158.39 pounds
71845.0 g / 704.8 N
|
| 5 mm |
|
119.74 kg / 263.98 pounds
119741.7 g / 1174.7 N
|
| 10 mm |
|
239.48 kg / 527.97 pounds
239483.3 g / 2349.3 N
|
| 11 mm |
|
263.43 kg / 580.77 pounds
263431.7 g / 2584.3 N
|
| 12 mm |
|
287.38 kg / 633.56 pounds
287380.0 g / 2819.2 N
|
Table 5: Thermal resistance (material behavior) - 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 pounds
287380.0 g / 2819.2 N
|
OK |
| 40 °C | -2.2% |
281.06 kg / 619.63 pounds
281057.6 g / 2757.2 N
|
OK |
| 60 °C | -4.4% |
274.74 kg / 605.69 pounds
274735.3 g / 2695.2 N
|
|
| 80 °C | -6.6% |
268.41 kg / 591.75 pounds
268412.9 g / 2633.1 N
|
|
| 100 °C | -28.8% |
204.61 kg / 451.10 pounds
204614.6 g / 2007.3 N
|
Table 6: Two magnets (attraction) - field range
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 pounds
5 371 Gs
|
109.91 kg / 242.30 pounds
109907 g / 1078.2 N
|
N/A |
| 1 mm |
698.96 kg / 1540.95 pounds
8 694 Gs
|
104.84 kg / 231.14 pounds
104845 g / 1028.5 N
|
629.07 kg / 1386.85 pounds
~0 Gs
|
| 2 mm |
665.22 kg / 1466.57 pounds
8 481 Gs
|
99.78 kg / 219.99 pounds
99784 g / 978.9 N
|
598.70 kg / 1319.91 pounds
~0 Gs
|
| 3 mm |
632.29 kg / 1393.97 pounds
8 269 Gs
|
94.84 kg / 209.10 pounds
94844 g / 930.4 N
|
569.07 kg / 1254.57 pounds
~0 Gs
|
| 5 mm |
569.22 kg / 1254.92 pounds
7 846 Gs
|
85.38 kg / 188.24 pounds
85383 g / 837.6 N
|
512.30 kg / 1129.42 pounds
~0 Gs
|
| 10 mm |
430.56 kg / 949.22 pounds
6 823 Gs
|
64.58 kg / 142.38 pounds
64584 g / 633.6 N
|
387.50 kg / 854.29 pounds
~0 Gs
|
| 20 mm |
238.49 kg / 525.78 pounds
5 078 Gs
|
35.77 kg / 78.87 pounds
35774 g / 350.9 N
|
214.64 kg / 473.20 pounds
~0 Gs
|
| 50 mm |
48.45 kg / 106.82 pounds
2 289 Gs
|
7.27 kg / 16.02 pounds
7268 g / 71.3 N
|
43.61 kg / 96.13 pounds
~0 Gs
|
| 60 mm |
31.33 kg / 69.07 pounds
1 841 Gs
|
4.70 kg / 10.36 pounds
4700 g / 46.1 N
|
28.20 kg / 62.16 pounds
~0 Gs
|
| 70 mm |
21.09 kg / 46.49 pounds
1 510 Gs
|
3.16 kg / 6.97 pounds
3163 g / 31.0 N
|
18.98 kg / 41.84 pounds
~0 Gs
|
| 80 mm |
14.67 kg / 32.35 pounds
1 260 Gs
|
2.20 kg / 4.85 pounds
2201 g / 21.6 N
|
13.21 kg / 29.12 pounds
~0 Gs
|
| 90 mm |
10.50 kg / 23.15 pounds
1 066 Gs
|
1.58 kg / 3.47 pounds
1575 g / 15.5 N
|
9.45 kg / 20.83 pounds
~0 Gs
|
| 100 mm |
7.69 kg / 16.95 pounds
912 Gs
|
1.15 kg / 2.54 pounds
1154 g / 11.3 N
|
6.92 kg / 15.26 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
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 |
| Car key | 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 |
18.23 km/h
(5.06 m/s)
|
17.30 J | |
| 30 mm |
21.78 km/h
(6.05 m/s)
|
24.71 J | |
| 50 mm |
22.32 km/h
(6.20 m/s)
|
25.95 J | |
| 100 mm |
22.55 km/h
(6.26 m/s)
|
26.48 J |
Table 9: Corrosion resistance
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 (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: 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. Sliding resistance
*Warning: On a vertical wall, the magnet holds just ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Heat tolerance
*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
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 deals
Advantages as well as disadvantages of rare earth magnets.
Pros
- They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
- They possess excellent resistance to magnetism drop due to external magnetic sources,
- A magnet with a metallic gold surface has better aesthetics,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to flexibility in forming and the ability to modify to individual projects,
- Huge importance in modern industrial fields – they serve a role in HDD drives, brushless drives, diagnostic systems, as well as multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Limited ability of producing nuts in the magnet and complicated forms - preferred is cover - magnetic holder.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
- Due to complex production process, their price exceeds standard values,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what it depends on?
- on a plate made of structural steel, effectively closing the magnetic field
- with a thickness no less than 10 mm
- with an ideally smooth touching surface
- with zero gap (without paint)
- during detachment in a direction vertical to the plane
- at temperature room level
Impact of factors on magnetic holding capacity in practice
- Clearance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Steel grade – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.
Safe handling of neodymium magnets
Handling rules
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Dust explosion hazard
Machining of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Health Danger
Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.
Eye protection
NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them cracking into small pieces.
Skin irritation risks
A percentage of the population suffer from a hypersensitivity to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause skin redness. We suggest use safety gloves.
Bodily injuries
Risk of injury: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Data carriers
Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.
Heat sensitivity
Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Threat to navigation
Remember: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.
Keep away from children
Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.
