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
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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.
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Technical specification of the product - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 modeling of the assembly - data
These values are the result of a mathematical analysis. Results rely on algorithms for the class Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - 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
|
crushing |
| 1 mm |
4241 Gs
424.1 mT
|
260.91 kg / 575.21 pounds
260910.0 g / 2559.5 N
|
crushing |
| 2 mm |
4028 Gs
402.8 mT
|
235.43 kg / 519.04 pounds
235433.0 g / 2309.6 N
|
crushing |
| 3 mm |
3818 Gs
381.8 mT
|
211.49 kg / 466.26 pounds
211490.2 g / 2074.7 N
|
crushing |
| 5 mm |
3412 Gs
341.2 mT
|
168.87 kg / 372.30 pounds
168870.4 g / 1656.6 N
|
crushing |
| 10 mm |
2539 Gs
253.9 mT
|
93.54 kg / 206.22 pounds
93539.2 g / 917.6 N
|
crushing |
| 15 mm |
1902 Gs
190.2 mT
|
52.48 kg / 115.70 pounds
52481.2 g / 514.8 N
|
crushing |
| 20 mm |
1457 Gs
145.7 mT
|
30.79 kg / 67.88 pounds
30789.8 g / 302.0 N
|
crushing |
| 30 mm |
920 Gs
92.0 mT
|
12.29 kg / 27.09 pounds
12288.2 g / 120.5 N
|
crushing |
| 50 mm |
456 Gs
45.6 mT
|
3.02 kg / 6.65 pounds
3016.4 g / 29.6 N
|
strong |
Table 2: Shear 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 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: 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 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) - power losses
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 stability (material behavior) - 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 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: Magnet-Magnet interaction (attraction) - forces in the system
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 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: Protective zones (electronics) - 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 |
| Phone / Smartphone | 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: Collisions (cracking risk) - 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: 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: 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. Vertical hold
*Caution: On a vertical surface, the magnet holds merely ~20% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Thermal stability
*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.
Chemical composition
| 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Pros and cons of Nd2Fe14B magnets.
Pros
- They retain magnetic properties for nearly 10 years – the loss is just ~1% (according to analyses),
- They do not lose their magnetic properties even under close interference source,
- In other words, due to the smooth surface of gold, the element looks attractive,
- Magnets are characterized by exceptionally strong magnetic induction on the working surface,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to freedom in designing and the ability to adapt to client solutions,
- Significant place in future technologies – they are commonly used in magnetic memories, electric motors, medical devices, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- Limited possibility of producing threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
- Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum lifting capacity of the magnet – what affects it?
- with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a surface free of scratches
- under conditions of ideal adhesion (metal-to-metal)
- under vertical force direction (90-degree angle)
- in temp. approx. 20°C
Practical aspects of lifting capacity – factors
- Gap between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Direction of force – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
- Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Safe distance
Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).
Life threat
Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Crushing risk
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.
Eye protection
Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Compass and GPS
Note: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.
Do not give to children
Product intended for adults. Small elements can be swallowed, leading to severe trauma. Keep out of reach of children and animals.
Fire risk
Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Conscious usage
Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.
Maximum temperature
Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Allergic reactions
It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands or select coated magnets.
