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MPL 30x15x2 / N38 - lamellar magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500
Rating: 5

lamellar magnet

Catalog no 020140

GTIN/EAN: 5906301811466

5.00

length

30 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

6.75 g

Magnetization Direction

↑ axial

Load capacity

2.11 kg / 20.74 N

Magnetic Induction

115.11 mT / 1151 Gs

Coating

[NiCuNi] Nickel

check properties »

3.89 ZŁ with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - MPL 30x15x2 / N38 - lamellar magnet

Specification / characteristics - MPL 30x15x2 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020140
GTIN/EAN	5906301811466
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
length	30 mm [±0,1 mm]
Width	15 mm [±0,1 mm]
Height	2 mm [±0,1 mm]
Weight	6.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.11 kg / 20.74 N
Magnetic Induction ~ ?	115.11 mT / 1151 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x15x2 / N38 - lamellar magnet

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 product - report

Presented data constitute the direct effect of a engineering analysis. Results rely on algorithms for the material Nd₂Fe₁₄B. Operational parameters might slightly differ from theoretical values. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - power drop
MPL 30x15x2 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	1151 Gs 115.1 mT	2.11 kg / 2110.0 g 20.7 N	strong
1 mm	1098 Gs 109.8 mT	1.92 kg / 1920.5 g 18.8 N	weak grip
2 mm	1019 Gs 101.9 mT	1.65 kg / 1654.9 g 16.2 N	weak grip
3 mm	926 Gs 92.6 mT	1.37 kg / 1365.9 g 13.4 N	weak grip
5 mm	733 Gs 73.3 mT	0.86 kg / 855.2 g 8.4 N	weak grip
10 mm	379 Gs 37.9 mT	0.23 kg / 228.8 g 2.2 N	weak grip
15 mm	203 Gs 20.3 mT	0.07 kg / 65.6 g 0.6 N	weak grip
20 mm	116 Gs 11.6 mT	0.02 kg / 21.6 g 0.2 N	weak grip
30 mm	46 Gs 4.6 mT	0.00 kg / 3.4 g 0.0 N	weak grip
50 mm	12 Gs 1.2 mT	0.00 kg / 0.2 g 0.0 N	weak grip

Pulling power drops significantly with every subsequent millimeter of distance. Note that even a very thin break (e.g., contamination, paint, veneer) noticeably diminishes the holding power. Neodymiums operate strongest during direct contact; gap drastically cuts the force. Observe how flashily the parameters fall, when the magnet does not adhere tightly to the steel surface. When calculating the assembly, discard additional spacers.

Table 2: Shear load (vertical surface)
MPL 30x15x2 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.42 kg / 422.0 g 4.1 N
1 mm	Stal (~0.2)	0.38 kg / 384.0 g 3.8 N
2 mm	Stal (~0.2)	0.33 kg / 330.0 g 3.2 N
3 mm	Stal (~0.2)	0.27 kg / 274.0 g 2.7 N
5 mm	Stal (~0.2)	0.17 kg / 172.0 g 1.7 N
10 mm	Stal (~0.2)	0.05 kg / 46.0 g 0.5 N
15 mm	Stal (~0.2)	0.01 kg / 14.0 g 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 4.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The following data indicates the theoretical weight limit required to initiate the slippage of the magnet down on a upright steel wall (considering standard friction). This value varies with the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x15x2 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.63 kg / 633.0 g 6.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.42 kg / 422.0 g 4.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.21 kg / 211.0 g 2.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.06 kg / 1055.0 g 10.3 N

When hanging a holder on a upright plane (e.g., a board), it will maintain barely about 1/5 of nominal attraction strength. Gravitational force as well as a low friction coefficient mean that holders slide down faster than they pop off the substrate. Want to create a hanger? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the holder will slide down under a significantly smaller weight. Application of an anti-slip layer can drastically increase the grip.

Table 4: Steel thickness (saturation) - power losses
MPL 30x15x2 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.21 kg / 211.0 g 2.1 N
1 mm	25%	0.53 kg / 527.5 g 5.2 N
2 mm	50%	1.06 kg / 1055.0 g 10.3 N
5 mm	100%	2.11 kg / 2110.0 g 20.7 N
10 mm	100%	2.11 kg / 2110.0 g 20.7 N

A thin sheet cannot focus the entire magnetic field, which wastes potential of the magnet. If you mount a strong magnet to a weak sheet, the field will penetrate right through and the pull force will drop sharply. To squeeze 100% of this magnet's power, you need a suitably thick element of steel. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - thermal limit
MPL 30x15x2 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	2.11 kg / 2110.0 g 20.7 N	OK
40 °C	-2.2%	2.06 kg / 2063.6 g 20.2 N	OK
60 °C	-4.4%	2.02 kg / 2017.2 g 19.8 N
80 °C	-6.6%	1.97 kg / 1970.7 g 19.3 N
100 °C	-28.8%	1.50 kg / 1502.3 g 14.7 N

Classic neodymiums change their properties parameters above the temperature limit. Protect against heat – high temperature can irreversibly damage this product. As the temperature rises, the magnet's power temporarily decreases. Avoid using this magnet close to heaters exceeding its safe range. Too high temperature will lead to destruction of magnetic properties.

*Engineering note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) are more susceptible to demagnetization sooner compared to rod magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 30x15x2 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	3.67 kg / 3675 g 36.1 N 2 169 Gs	N/A
1 mm	3.53 kg / 3533 g 34.7 N 2 257 Gs	3.18 kg / 3180 g 31.2 N ~0 Gs
2 mm	3.34 kg / 3345 g 32.8 N 2 196 Gs	3.01 kg / 3010 g 29.5 N ~0 Gs
3 mm	3.12 kg / 3124 g 30.6 N 2 122 Gs	2.81 kg / 2812 g 27.6 N ~0 Gs
5 mm	2.63 kg / 2631 g 25.8 N 1 948 Gs	2.37 kg / 2368 g 23.2 N ~0 Gs
10 mm	1.49 kg / 1490 g 14.6 N 1 465 Gs	1.34 kg / 1341 g 13.2 N ~0 Gs
20 mm	0.40 kg / 398 g 3.9 N 758 Gs	0.36 kg / 359 g 3.5 N ~0 Gs
50 mm	0.01 kg / 14 g 0.1 N 142 Gs	0.01 kg / 13 g 0.1 N ~0 Gs

Two strong neodymiums attract each other from a significantly greater distance than a magnet and sheet combination. The connection of two magnets creates a more powerful interaction and a larger range of operation. Want to build a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Remember that when connecting a pair of magnets, the collision energy is huge. The levitation is slightly lower than the attraction, but still impressive.
*Flux density between like poles is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).

Table 7: Hazards (implants) - warnings
MPL 30x15x2 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Timepiece	20 Gs (2.0 mT)	4.5 cm
Mobile device	40 Gs (4.0 mT)	3.5 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field is a large risk to electronics and medical implants. These NdFeB products generate a flux that disrupts operation of digital equipment. Notice: the invisible magnetic field acts through matter and housings. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x15x2 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.00 km/h (5.28 m/s)	0.09 J
30 mm	30.91 km/h (8.59 m/s)	0.25 J
50 mm	39.87 km/h (11.08 m/s)	0.41 J
100 mm	56.39 km/h (15.66 m/s)	0.83 J

Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Watch the impact speed – a neodymium left loose becomes dangerous. Impact energy can cause material chips or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the neodymium. Use safety goggles when playing with powerful specimens.

Table 9: Surface protection spec
MPL 30x15x2 / 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)

The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (P_c)
MPL 30x15x2 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 236 Mx	62.4 µWb
P_c Coefficient	0.13	Low (Flat)

Flux value emitted by the magnet pole. Key data when building generators and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 30x15x2 / N38

Environment	Effective steel pull	Effect
Air (land)	2.11 kg	Standard
Water (riverbed)	2.42 kg (+0.31 kg Buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Warning: On a vertical wall, the magnet holds merely ~20% of its max power.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Heat tolerance

*For standard magnets, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.13

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 P_c (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 P_c 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.

Technical and environmental data

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 020140-2025

Measurement Calculator

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Kilograms (kg)

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 30x15x2 mm and a weight of 6.75 g, guarantees the highest quality connection. This rectangular block with a force of 20.74 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 2.11 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 30x15x2 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 2.11 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.

For mounting flat magnets MPL 30x15x2 / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (30x15 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.

The presented product is a neodymium magnet with precisely defined parameters: 30 mm (length), 15 mm (width), and 2 mm (thickness). It is a magnetic block with dimensions 30x15x2 mm and a self-weight of 6.75 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Benefits

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:

They do not lose power, even after approximately ten years – the drop in power is only ~1% (based on measurements),
Magnets perfectly defend themselves against loss of magnetization caused by foreign field sources,
By using a smooth coating of silver, the element gains an nice look,
Magnets have extremely high magnetic induction on the outer side,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
Thanks to the ability of free forming and adaptation to specialized needs, NdFeB magnets can be created in a wide range of forms and dimensions, which expands the range of possible applications,
Key role in advanced technology sectors – they are used in magnetic memories, drive modules, advanced medical instruments, also multitasking production systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 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 prevent oxidation as well as corrosion.
Limited possibility of making threads in the magnet and complicated shapes - preferred is casing - magnetic holder.
Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products are able to disrupt the diagnostic process medical after entering the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

The lifting capacity listed is a result of laboratory testing performed under the following configuration:

on a block made of structural steel, perfectly concentrating the magnetic flux
with a thickness no less than 10 mm
with an ideally smooth contact surface
without any air gap between the magnet and steel
during detachment in a direction vertical to the plane
in temp. approx. 20°C

Lifting capacity in real conditions – factors

Holding efficiency is influenced by working environment parameters, including (from most important):

Clearance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
Base massiveness – too thin plate causes magnetic saturation, causing part of the power to be wasted to the other side.
Material type – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
Smoothness – full contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings

Warning for allergy sufferers

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, refrain from direct skin contact and select encased magnets.

This is not a toy

Absolutely keep magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

GPS Danger

Be aware: neodymium magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.

Permanent damage

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Life threat

Individuals with a heart stimulator must maintain an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Safe distance

Do not bring magnets close to a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Hand protection

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Eye protection

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.

Handling guide

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Combustion hazard

Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?

MPL 30x15x2 / N38 - lamellar magnet

Technical parameters of the product - MPL 30x15x2 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the product - report

Table 1: Static pull force (force vs gap) - power drop MPL 30x15x2 / N38

Table 2: Shear load (vertical surface) MPL 30x15x2 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 30x15x2 / N38

Table 4: Steel thickness (saturation) - power losses MPL 30x15x2 / N38

Table 5: Thermal stability (stability) - thermal limit MPL 30x15x2 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MPL 30x15x2 / N38

Table 7: Hazards (implants) - warnings MPL 30x15x2 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 30x15x2 / N38

Table 9: Surface protection spec MPL 30x15x2 / N38

Table 10: Construction data (Pc) MPL 30x15x2 / N38

Table 11: Hydrostatics and buoyancy MPL 30x15x2 / N38

1. Shear force

2. Steel saturation

3. Heat tolerance

4. Demagnetization curve and operating point (B-H)

Material specification

Environmental data

Pulling force

Magnetic Induction

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Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Limitations

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Lifting capacity in real conditions – factors

Warnings

Warning for allergy sufferers

This is not a toy

GPS Danger

Permanent damage

Life threat

Safe distance

Hand protection

Eye protection

Handling guide

Combustion hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - power drop
MPL 30x15x2 / N38

Table 2: Shear load (vertical surface)
MPL 30x15x2 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x15x2 / N38

Table 4: Steel thickness (saturation) - power losses
MPL 30x15x2 / N38

Table 5: Thermal stability (stability) - thermal limit
MPL 30x15x2 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 30x15x2 / N38

Table 7: Hazards (implants) - warnings
MPL 30x15x2 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x15x2 / N38

Table 9: Surface protection spec
MPL 30x15x2 / N38

Table 10: Construction data (P_c)
MPL 30x15x2 / N38

Table 11: Hydrostatics and buoyancy
MPL 30x15x2 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.