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MPL 20x5x5 / N38 - lamellar magnet

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

lamellar magnet

Catalog no 020132

GTIN/EAN: 5906301811381

5.00

length

20 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

3.75 g

Magnetization Direction

↑ axial

Load capacity

4.42 kg / 43.32 N

Magnetic Induction

456.78 mT / 4568 Gs

Coating

[NiCuNi] Nickel

technical specifications »

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Technical - MPL 20x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 20x5x5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020132
GTIN/EAN	5906301811381
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	20 mm [±0,1 mm]
Width	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	3.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.42 kg / 43.32 N
Magnetic Induction ~ ?	456.78 mT / 4568 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x5x5 / 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 modeling of the assembly - technical parameters

The following values represent the direct effect of a physical calculation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance might slightly differ from theoretical values. Use these calculations as a reference point for designers.

Table 1: Static pull force (force vs distance) - characteristics
MPL 20x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4563 Gs 456.3 mT	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N	medium risk
1 mm	3323 Gs 332.3 mT	2.34 kg / 5.17 lbs 2344.7 g / 23.0 N	medium risk
2 mm	2341 Gs 234.1 mT	1.16 kg / 2.56 lbs 1163.0 g / 11.4 N	weak grip
3 mm	1678 Gs 167.8 mT	0.60 kg / 1.32 lbs 597.4 g / 5.9 N	weak grip
5 mm	944 Gs 94.4 mT	0.19 kg / 0.42 lbs 189.2 g / 1.9 N	weak grip
10 mm	320 Gs 32.0 mT	0.02 kg / 0.05 lbs 21.7 g / 0.2 N	weak grip
15 mm	141 Gs 14.1 mT	0.00 kg / 0.01 lbs 4.2 g / 0.0 N	weak grip
20 mm	73 Gs 7.3 mT	0.00 kg / 0.00 lbs 1.1 g / 0.0 N	weak grip
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	weak grip
50 mm	7 Gs 0.7 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip

Magnetic force drops sharply with every mm of gap. Remember that even a microscopic distance (e.g., dirt, varnish, veneer) significantly reduces the pull force. Magnets hold most effectively in perfect adhesion; distance weakens the force. Observe how quickly the parameters drop, when the magnet does not touch flatly to the metal substrate. When planning the mounting, eliminate unnecessary gaps.

Table 2: Shear capacity (vertical surface)
MPL 20x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.88 kg / 1.95 lbs 884.0 g / 8.7 N
1 mm	Stal (~0.2)	0.47 kg / 1.03 lbs 468.0 g / 4.6 N
2 mm	Stal (~0.2)	0.23 kg / 0.51 lbs 232.0 g / 2.3 N
3 mm	Stal (~0.2)	0.12 kg / 0.26 lbs 120.0 g / 1.2 N
5 mm	Stal (~0.2)	0.04 kg / 0.08 lbs 38.0 g / 0.4 N
10 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The following data calculates the theoretical weight limit sufficient to cause the slippage of the magnet vertically against a upright metal surface (assuming typical friction). This value is a function of the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 20x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.33 kg / 2.92 lbs 1326.0 g / 13.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.88 kg / 1.95 lbs 884.0 g / 8.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.44 kg / 0.97 lbs 442.0 g / 4.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.21 kg / 4.87 lbs 2210.0 g / 21.7 N

When hanging a holder on a upright surface (e.g., a car body), it will only hold just approx. 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip mean that holders slide down easier than they pop off the substrate. Designing a hanger? Note that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a much lighter weight. Utilizing a rubberized layer can effectively raise the stability.

Table 4: Steel thickness (saturation) - power losses
MPL 20x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.44 kg / 0.97 lbs 442.0 g / 4.3 N
1 mm	25%	1.11 kg / 2.44 lbs 1105.0 g / 10.8 N
2 mm	50%	2.21 kg / 4.87 lbs 2210.0 g / 21.7 N
3 mm	75%	3.32 kg / 7.31 lbs 3315.0 g / 32.5 N
5 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
10 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
11 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N
12 mm	100%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N

A thin sheet cannot conduct the full magnetic flux, which weakens actual performance of the holder. Should you install a neodymium to a weak sheet, the flux will pass right through and the holding will be smaller. To squeeze full efficiency of this magnet's power, you need a suitably thick piece of steel. The saturation phenomenon means that on thin elements (e.g., appliance housings), the holder holds weaker. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 20x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.42 kg / 9.74 lbs 4420.0 g / 43.4 N	OK
40 °C	-2.2%	4.32 kg / 9.53 lbs 4322.8 g / 42.4 N	OK
60 °C	-4.4%	4.23 kg / 9.32 lbs 4225.5 g / 41.5 N
80 °C	-6.6%	4.13 kg / 9.10 lbs 4128.3 g / 40.5 N
100 °C	-28.8%	3.15 kg / 6.94 lbs 3147.0 g / 30.9 N

Classic neodymiums irreversibly lose power past the thermal threshold. Watch out for overheating – heat can permanently destroy this magnet. As the temperature rises, the magnet's capacity temporarily lowers. Do not use this product close to ovens higher than its operating temperature limit. Too high temperature will cause destruction of magnetic properties.

*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 20x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	12.84 kg / 28.30 lbs 5 504 Gs	1.93 kg / 4.24 lbs 1925 g / 18.9 N	N/A
1 mm	9.53 kg / 21.01 lbs 7 864 Gs	1.43 kg / 3.15 lbs 1430 g / 14.0 N	8.58 kg / 18.91 lbs ~0 Gs
2 mm	6.81 kg / 15.01 lbs 6 647 Gs	1.02 kg / 2.25 lbs 1021 g / 10.0 N	6.13 kg / 13.51 lbs ~0 Gs
3 mm	4.79 kg / 10.57 lbs 5 577 Gs	0.72 kg / 1.59 lbs 719 g / 7.1 N	4.31 kg / 9.51 lbs ~0 Gs
5 mm	2.40 kg / 5.30 lbs 3 949 Gs	0.36 kg / 0.79 lbs 360 g / 3.5 N	2.16 kg / 4.77 lbs ~0 Gs
10 mm	0.55 kg / 1.21 lbs 1 888 Gs	0.08 kg / 0.18 lbs 82 g / 0.8 N	0.49 kg / 1.09 lbs ~0 Gs
20 mm	0.06 kg / 0.14 lbs 640 Gs	0.01 kg / 0.02 lbs 9 g / 0.1 N	0.06 kg / 0.13 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 84 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.00 lbs 53 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
70 mm	0.00 kg / 0.00 lbs 35 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
80 mm	0.00 kg / 0.00 lbs 24 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
90 mm	0.00 kg / 0.00 lbs 18 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.00 lbs 13 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet generates a stronger field and a larger range of operation. Designing a powerful holder? Use a pair of magnets instead of one magnet and a steel. Be careful that when attracting two neodymiums, the collision energy is massive. The repulsion force is a bit weaker than the connection force, but still significant.
*Flux density between like poles drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Attention: Calculations apply to shear force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - precautionary measures
MPL 20x5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.0 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Timepiece	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a real danger to electronic devices and medical implants. These NdFeB products produce a field that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field acts through matter and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, remotes, speakers, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MPL 20x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	34.73 km/h (9.65 m/s)	0.17 J
30 mm	59.97 km/h (16.66 m/s)	0.52 J
50 mm	77.42 km/h (21.51 m/s)	0.87 J
100 mm	109.49 km/h (30.41 m/s)	1.73 J

Neodymium magnets are very brittle – a collision with steel can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the magnet. Wear eye protection when playing with powerful specimens.

Table 9: Corrosion resistance
MPL 20x5x5 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MPL 20x5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 204 Mx	42.0 µWb
P_c Coefficient	0.54	Low (Flat)

Total magnetic flux emitted by the pole surface. Essential parameter in coil applications and motors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
MPL 20x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	4.42 kg	Standard
Water (riverbed)	5.06 kg (+0.64 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!

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. Sliding resistance

*Caution: On a vertical surface, the magnet holds merely a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Power loss vs temp

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.54

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 specification and ecology

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: 020132-2026

Measurement Calculator

Magnet pull force

Force in kg

lbs

Field Strength

Gauss (Gs)

Input a figure in a single field to get results in the other units at once.

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Model MPL 20x5x5 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 43.32 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 20x5x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

They constitute a key element in the production of generators and material handling systems. Thanks to the flat surface and high force (approx. 4.42 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. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.

This model is characterized by dimensions 20x5x5 mm, which, at a weight of 3.75 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 20x5x5 mm and a self-weight of 3.75 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Benefits

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

They do not lose strength, even over nearly ten years – the decrease in strength is only ~1% (according to tests),
Magnets perfectly protect themselves against loss of magnetization caused by external fields,
By using a shiny layer of nickel, the element presents an proper look,
Magnets have maximum magnetic induction on the active area,
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...
Possibility of detailed machining as well as optimizing to individual applications,
Key role in modern industrial fields – they are used in mass storage devices, electromotive mechanisms, advanced medical instruments, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions

Limitations

Disadvantages of NdFeB magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in realizing threads and complex shapes in magnets, we recommend using casing - magnetic mount.
Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical after entering the body.
With budget limitations the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The force parameter is a measurement result conducted under specific, ideal conditions:

with the contact of a sheet made of special test steel, ensuring full magnetic saturation
with a thickness of at least 10 mm
with a surface perfectly flat
without the slightest insulating layer between the magnet and steel
during detachment in a direction vertical to the mounting surface
at room temperature

Impact of factors on magnetic holding capacity in practice

In practice, the actual holding force is determined by many variables, ranked from most significant:

Gap (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Warnings

Fragile material

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Fire warning

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Nickel allergy

A percentage of the population experience a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause an allergic reaction. It is best to use protective gloves.

Medical implants

Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.

No play value

Absolutely keep magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are tragic.

Respect the power

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Finger safety

Watch your fingers. Two large magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!

Cards and drives

Very strong magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.

Phone sensors

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Demagnetization risk

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Security! More info about risks in the article: Magnet Safety Guide.

MPL 20x5x5 / N38 - lamellar magnet

Technical - MPL 20x5x5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the assembly - technical parameters

Table 1: Static pull force (force vs distance) - characteristics MPL 20x5x5 / N38

Table 2: Shear capacity (vertical surface) MPL 20x5x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 20x5x5 / N38

Table 4: Steel thickness (saturation) - power losses MPL 20x5x5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MPL 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MPL 20x5x5 / N38

Table 7: Protective zones (electronics) - precautionary measures MPL 20x5x5 / N38

Table 8: Collisions (cracking risk) - collision effects MPL 20x5x5 / N38

Table 9: Corrosion resistance MPL 20x5x5 / N38

Table 10: Electrical data (Pc) MPL 20x5x5 / N38

Table 11: Physics of underwater searching MPL 20x5x5 / N38

1. Sliding resistance

2. Steel saturation

3. Power loss vs temp

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

Material specification

Environmental data

Magnet pull force

Field Strength

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MPL 40x10x5 / N38 - lamellar magnet

UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Limitations

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Impact of factors on magnetic holding capacity in practice

Warnings

Fragile material

Fire warning

Nickel allergy

Medical implants

No play value

Respect the power

Finger safety

Cards and drives

Phone sensors

Demagnetization risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - characteristics
MPL 20x5x5 / N38

Table 2: Shear capacity (vertical surface)
MPL 20x5x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 20x5x5 / N38

Table 4: Steel thickness (saturation) - power losses
MPL 20x5x5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 20x5x5 / N38

Table 7: Protective zones (electronics) - precautionary measures
MPL 20x5x5 / N38

Table 8: Collisions (cracking risk) - collision effects
MPL 20x5x5 / N38

Table 9: Corrosion resistance
MPL 20x5x5 / N38

Table 10: Electrical data (P_c)
MPL 20x5x5 / N38

Table 11: Physics of underwater searching
MPL 20x5x5 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.