Product available Ships today (order by 14:00)

MPL 40x18x10 SH / 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 020157

GTIN/EAN: 5906301811633

5.00

length

40 mm [±0,1 mm]

Width

18 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

54 g

Magnetization Direction

↑ axial

Load capacity

23.81 kg / 233.58 N

Magnetic Induction

366.66 mT / 3667 Gs

Coating

[NiCuNi] Nickel

product parameters »

36.29 ZŁ with VAT / pcs + price for transport

29.50 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 40x18x10 SH / N38 - lamellar magnet

Specification / characteristics - MPL 40x18x10 SH / N38 - lamellar magnet

properties

properties	values
Cat. no.	020157
GTIN/EAN	5906301811633
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	40 mm [±0,1 mm]
Width	18 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	54 g
Magnetization Direction	↑ axial
Load capacity ~ ?	23.81 kg / 233.58 N
Magnetic Induction ~ ?	366.66 mT / 3667 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x18x10 SH / 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

Technical simulation of the product - data

These data constitute the result of a mathematical analysis. Results were calculated on models for the material Nd₂Fe₁₄B. Real-world performance might slightly differ from theoretical values. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs distance) - interaction chart
MPL 40x18x10 SH / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	3666 Gs 366.6 mT	23.81 kg / 23810.0 g 233.6 N	critical level
1 mm	3399 Gs 339.9 mT	20.48 kg / 20476.1 g 200.9 N	critical level
2 mm	3120 Gs 312.0 mT	17.25 kg / 17245.9 g 169.2 N	critical level
3 mm	2841 Gs 284.1 mT	14.30 kg / 14304.1 g 140.3 N	critical level
5 mm	2321 Gs 232.1 mT	9.55 kg / 9547.8 g 93.7 N	warning
10 mm	1370 Gs 137.0 mT	3.32 kg / 3324.4 g 32.6 N	warning
15 mm	833 Gs 83.3 mT	1.23 kg / 1229.0 g 12.1 N	low risk
20 mm	530 Gs 53.0 mT	0.50 kg / 498.1 g 4.9 N	low risk
30 mm	244 Gs 24.4 mT	0.11 kg / 105.3 g 1.0 N	low risk
50 mm	75 Gs 7.5 mT	0.01 kg / 9.9 g 0.1 N	low risk

Grip strength weakens sharply per each millimeter of distance. Keep in mind that even the smallest gap (e.g., dirt, varnish, dust) strongly weakens the grip. Neodymiums operate most effectively at the point of direct contact; distance drastically cuts the power. Observe how quickly the parameters fall, when the product does not touch directly to the steel surface. When planning the assembly, eliminate unnecessary gaps.

Table 2: Slippage hold (wall)
MPL 40x18x10 SH / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	4.76 kg / 4762.0 g 46.7 N
1 mm	Stal (~0.2)	4.10 kg / 4096.0 g 40.2 N
2 mm	Stal (~0.2)	3.45 kg / 3450.0 g 33.8 N
3 mm	Stal (~0.2)	2.86 kg / 2860.0 g 28.1 N
5 mm	Stal (~0.2)	1.91 kg / 1910.0 g 18.7 N
10 mm	Stal (~0.2)	0.66 kg / 664.0 g 6.5 N
15 mm	Stal (~0.2)	0.25 kg / 246.0 g 2.4 N
20 mm	Stal (~0.2)	0.10 kg / 100.0 g 1.0 N
30 mm	Stal (~0.2)	0.02 kg / 22.0 g 0.2 N
50 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N

The table below calculates the theoretical shear load sufficient to initiate the shifting of the magnet downwards on a upright metal surface (considering typical friction coefficient). This value is a function of the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MPL 40x18x10 SH / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	7.14 kg / 7143.0 g 70.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.76 kg / 4762.0 g 46.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.38 kg / 2381.0 g 23.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	11.91 kg / 11905.0 g 116.8 N

When hanging a element on a vertical surface (e.g., a board), it will maintain barely approx. 20%-30% of its nominal power. Gravity and a weak degree of grip cause that holders slip easier than they pull off. Want to create a hanger? Remember that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the holder will slip down under a noticeably lighter cargo. Using a rubber layer can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 40x18x10 SH / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	5%	1.19 kg / 1190.5 g 11.7 N
1 mm	13%	2.98 kg / 2976.3 g 29.2 N
2 mm	25%	5.95 kg / 5952.5 g 58.4 N
5 mm	63%	14.88 kg / 14881.3 g 146.0 N
10 mm	100%	23.81 kg / 23810.0 g 233.6 N

A too thin steel is incapable of take in the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a weak sheet, the field will pass right through and the holding will be smaller. To achieve the maximum of this neodymium's potential, you need a suitably thick element of steel. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the holder holds weaker. We advise picking the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
MPL 40x18x10 SH / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	23.81 kg / 23810.0 g 233.6 N	OK
40 °C	-2.2%	23.29 kg / 23286.2 g 228.4 N	OK
60 °C	-4.4%	22.76 kg / 22762.4 g 223.3 N
80 °C	-6.6%	22.24 kg / 22238.5 g 218.2 N
100 °C	-28.8%	16.95 kg / 16952.7 g 166.3 N

Ordinary NdFeB products irreversibly lose power after exceeding the maximum temperature. Protect against heat – excessive heat can permanently destroy this magnet. With every degree above norm, the magnet's capacity momentarily drops. Do not use this product close to heaters exceeding its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetism.

*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than taller cylinders. Warning indicator in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MPL 40x18x10 SH / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	59.64 kg / 59645 g 585.1 N 5 034 Gs	N/A
1 mm	55.50 kg / 55499 g 544.4 N 7 072 Gs	49.95 kg / 49949 g 490.0 N ~0 Gs
2 mm	51.29 kg / 51293 g 503.2 N 6 799 Gs	46.16 kg / 46164 g 452.9 N ~0 Gs
3 mm	47.18 kg / 47176 g 462.8 N 6 520 Gs	42.46 kg / 42459 g 416.5 N ~0 Gs
5 mm	39.41 kg / 39410 g 386.6 N 5 959 Gs	35.47 kg / 35469 g 348.0 N ~0 Gs
10 mm	23.92 kg / 23918 g 234.6 N 4 643 Gs	21.53 kg / 21526 g 211.2 N ~0 Gs
20 mm	8.33 kg / 8328 g 81.7 N 2 739 Gs	7.49 kg / 7495 g 73.5 N ~0 Gs
50 mm	0.55 kg / 552 g 5.4 N 705 Gs	0.50 kg / 497 g 4.9 N ~0 Gs

Two magnetic products interact from a wider radius than a neodymium and metal combination. The connection of two magnets generates a stronger field and a further horizon of action. Designing a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the impact force is extreme. The levitation is slightly lower than the connection force, but still large.
*The magnetic induction in repulsion mode reaches ~0 Gs at the midpoint between the magnets (resulting from vector opposition).

Table 7: Protective zones (electronics) - warnings
MPL 40x18x10 SH / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	14.0 cm
Hearing aid	10 Gs (1.0 mT)	11.0 cm
Mechanical watch	20 Gs (2.0 mT)	8.5 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Car key	50 Gs (5.0 mT)	6.0 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

A strong magnetic field poses a large risk to IT equipment as well as pacemakers. These magnets generate a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and glass. Exceptional care must be exercised by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MPL 40x18x10 SH / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.95 km/h (6.38 m/s)	1.10 J
30 mm	36.78 km/h (10.22 m/s)	2.82 J
50 mm	47.37 km/h (13.16 m/s)	4.67 J
100 mm	66.97 km/h (18.60 m/s)	9.34 J

Magnetic elements are very brittle – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Impact energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when working with large magnets.

Table 9: Corrosion resistance
MPL 40x18x10 SH / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MPL 40x18x10 SH / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	26 060 Mx	260.6 µWb
P_c Coefficient	0.43	Low (Flat)

Flux value emitted by the magnet pole. Key data in coil applications as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 40x18x10 SH / N38

Environment	Effective steel pull	Effect
Air (land)	23.81 kg	Standard
Water (riverbed)	27.26 kg (+3.45 kg Buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains just ~20% of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.43

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 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.

Engineering data and GPSR

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

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: 020157-2025

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This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 40x18x10 mm and a weight of 54 g, guarantees premium class connection. This rectangular block with a force of 233.58 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.

The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 23.81 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.

Plate magnets MPL 40x18x10 SH / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 23.81 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. 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 (40x18 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

This model is characterized by dimensions 40x18x10 mm, which, at a weight of 54 g, makes it an element with impressive energy density. The key parameter here is the lifting capacity amounting to approximately 23.81 kg (force ~233.58 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros and cons of Nd₂Fe₁₄B magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
Magnets very well protect themselves against loss of magnetization caused by ambient magnetic noise,
The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
Magnetic induction on the working layer of the magnet remains very high,
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...
Due to the possibility of precise shaping and adaptation to unique projects, neodymium magnets can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
Fundamental importance in modern technologies – they serve a role in computer drives, brushless drives, diagnostic systems, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in compact constructions

Weaknesses

Drawbacks and weaknesses of neodymium magnets: tips and applications.

At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
Due to neodymium price, their price is higher than average,

Lifting parameters

Highest magnetic holding force – what it depends on?

The force parameter is a theoretical maximum value executed under the following configuration:

with the contact of a sheet made of special test steel, guaranteeing full magnetic saturation
with a cross-section minimum 10 mm
with a plane cleaned and smooth
without the slightest clearance between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Determinants of practical lifting force of a magnet

In practice, the actual holding force results from a number of factors, presented from crucial:

Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
Steel grade – the best choice is pure iron steel. Cast iron may attract less.
Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness happens, cease handling magnets and wear gloves.

Hand protection

Danger of trauma: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Operating temperature

Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and pulling force.

Implant safety

Patients with a pacemaker have to maintain an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Electronic hazard

Data protection: Neodymium magnets can damage data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Powerful field

Handle with care. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can move away.

Mechanical processing

Dust generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

This is not a toy

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Magnets are brittle

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets will cause them cracking into small pieces.

Keep away from electronics

Navigation devices and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.

Security! Want to know more? Check our post: Why are neodymium magnets dangerous?

MPL 40x18x10 SH / N38 - lamellar magnet

Physical properties - MPL 40x18x10 SH / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the product - data

Table 1: Static pull force (pull vs distance) - interaction chart MPL 40x18x10 SH / N38

Table 2: Slippage hold (wall) MPL 40x18x10 SH / N38

Table 3: Wall mounting (shearing) - vertical pull MPL 40x18x10 SH / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MPL 40x18x10 SH / N38

Table 5: Thermal resistance (material behavior) - power drop MPL 40x18x10 SH / N38

Table 6: Two magnets (repulsion) - field range MPL 40x18x10 SH / N38

Table 7: Protective zones (electronics) - warnings MPL 40x18x10 SH / N38

Table 8: Impact energy (cracking risk) - collision effects MPL 40x18x10 SH / N38

Table 9: Corrosion resistance MPL 40x18x10 SH / N38

Table 10: Electrical data (Pc) MPL 40x18x10 SH / N38

Table 11: Hydrostatics and buoyancy MPL 40x18x10 SH / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Sustainability

Pulling force

Magnetic Induction

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Pros and cons of Nd2Fe14B magnets.

Pros

Weaknesses

Lifting parameters

Highest magnetic holding force – what it depends on?

Determinants of practical lifting force of a magnet

Safety rules for work with NdFeB magnets

Sensitization to coating

Hand protection

Operating temperature

Implant safety

Electronic hazard

Powerful field

Mechanical processing

This is not a toy

Magnets are brittle

Keep away from electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - interaction chart
MPL 40x18x10 SH / N38

Table 2: Slippage hold (wall)
MPL 40x18x10 SH / N38

Table 3: Wall mounting (shearing) - vertical pull
MPL 40x18x10 SH / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 40x18x10 SH / N38

Table 5: Thermal resistance (material behavior) - power drop
MPL 40x18x10 SH / N38

Table 6: Two magnets (repulsion) - field range
MPL 40x18x10 SH / N38

Table 7: Protective zones (electronics) - warnings
MPL 40x18x10 SH / N38

Table 8: Impact energy (cracking risk) - collision effects
MPL 40x18x10 SH / N38

Table 9: Corrosion resistance
MPL 40x18x10 SH / N38

Table 10: Electrical data (P_c)
MPL 40x18x10 SH / N38

Table 11: Hydrostatics and buoyancy
MPL 40x18x10 SH / N38

Pros and cons of Nd₂Fe₁₄B magnets.