Product available Ships tomorrow

MPL 17x17x3 / 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 020124

GTIN/EAN: 5906301811305

5.00

length

17 mm [±0,1 mm]

Width

17 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.5 g

Magnetization Direction

↑ axial

Load capacity

3.22 kg / 31.54 N

Magnetic Induction

187.48 mT / 1875 Gs

Coating

[NiCuNi] Nickel

technical details »

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Product card - MPL 17x17x3 / N38 - lamellar magnet

Specification / characteristics - MPL 17x17x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020124
GTIN/EAN	5906301811305
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	17 mm [±0,1 mm]
Width	17 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	6.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.22 kg / 31.54 N
Magnetic Induction ~ ?	187.48 mT / 1875 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 17x17x3 / 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 analysis of the magnet - report

The following values represent the result of a mathematical calculation. Values are based on models for the material Nd₂Fe₁₄B. Real-world performance might slightly differ. Use these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - power drop
MPL 17x17x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	1874 Gs 187.4 mT	3.22 kg / 3220.0 g 31.6 N	medium risk
1 mm	1761 Gs 176.1 mT	2.84 kg / 2842.9 g 27.9 N	medium risk
2 mm	1610 Gs 161.0 mT	2.38 kg / 2376.8 g 23.3 N	medium risk
3 mm	1440 Gs 144.0 mT	1.90 kg / 1901.0 g 18.6 N	weak grip
5 mm	1099 Gs 109.9 mT	1.11 kg / 1107.5 g 10.9 N	weak grip
10 mm	508 Gs 50.8 mT	0.24 kg / 236.4 g 2.3 N	weak grip
15 mm	245 Gs 24.5 mT	0.06 kg / 55.2 g 0.5 N	weak grip
20 mm	131 Gs 13.1 mT	0.02 kg / 15.7 g 0.2 N	weak grip
30 mm	48 Gs 4.8 mT	0.00 kg / 2.1 g 0.0 N	weak grip
50 mm	12 Gs 1.2 mT	0.00 kg / 0.1 g 0.0 N	weak grip

Grip strength drops sharply with every subsequent millimeter of spacing. Keep in mind that even a microscopic distance (e.g., contamination, paint, rust) noticeably diminishes the holding power. Magnetic products operate most effectively during direct contact; air break kills the power. Analyze how quickly the parameters drop, when the product does not adhere tightly to the metal substrate. When planning the mounting, eliminate redundant distances.

Table 2: Vertical force (vertical surface)
MPL 17x17x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.64 kg / 644.0 g 6.3 N
1 mm	Stal (~0.2)	0.57 kg / 568.0 g 5.6 N
2 mm	Stal (~0.2)	0.48 kg / 476.0 g 4.7 N
3 mm	Stal (~0.2)	0.38 kg / 380.0 g 3.7 N
5 mm	Stal (~0.2)	0.22 kg / 222.0 g 2.2 N
10 mm	Stal (~0.2)	0.05 kg / 48.0 g 0.5 N
15 mm	Stal (~0.2)	0.01 kg / 12.0 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 table below defines the estimated weight limit sufficient to initiate the shifting of the magnet vertically along a vertical steel wall (considering standard friction coefficient). This parameter is a function of the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MPL 17x17x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.97 kg / 966.0 g 9.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.64 kg / 644.0 g 6.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.32 kg / 322.0 g 3.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.61 kg / 1610.0 g 15.8 N

When mounting a magnet on a upright wall (e.g., a car body), it will only hold barely about 20%-30% of its nominal power. Gravitational force and a weak degree of grip mean that products slide down easier than they pop off the substrate. Want to create a hanger? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slip down under a noticeably lighter cargo. Utilizing a rubberized coating can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MPL 17x17x3 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.32 kg / 322.0 g 3.2 N
1 mm	25%	0.81 kg / 805.0 g 7.9 N
2 mm	50%	1.61 kg / 1610.0 g 15.8 N
5 mm	100%	3.22 kg / 3220.0 g 31.6 N
10 mm	100%	3.22 kg / 3220.0 g 31.6 N

A thin metal plate cannot focus the entire magnetic field, which wastes potential of the magnet. Should you install a neodymium to a weak sheet, the flux will pass right through and the holding will be smaller. To squeeze 100% of this magnet's power, you need a suitably thick backing of steel. The material oversaturation means that on thin elements (e.g., appliance housings), the holder works worse. We suggest choosing the steel thickness based on the following data.

Table 5: Working in heat (material behavior) - resistance threshold
MPL 17x17x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	3.22 kg / 3220.0 g 31.6 N	OK
40 °C	-2.2%	3.15 kg / 3149.2 g 30.9 N	OK
60 °C	-4.4%	3.08 kg / 3078.3 g 30.2 N
80 °C	-6.6%	3.01 kg / 3007.5 g 29.5 N
100 °C	-28.8%	2.29 kg / 2292.6 g 22.5 N

Classic neodymiums lose parameters above the temperature limit. Protect against heat – excessive heat can irreversibly damage this product. As the temperature rises, the magnet's power momentarily lowers. Avoid using this magnet close to ovens higher than its working range. Too high temperature will cause permanent loss of magnetism.

*Engineering note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) may lose charge permanently under lower heat stress compared to rod magnets. Red status in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 17x17x3 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	6.26 kg / 6260 g 61.4 N 3 313 Gs	N/A
1 mm	5.93 kg / 5928 g 58.2 N 3 648 Gs	5.33 kg / 5335 g 52.3 N ~0 Gs
2 mm	5.53 kg / 5527 g 54.2 N 3 523 Gs	4.97 kg / 4974 g 48.8 N ~0 Gs
3 mm	5.08 kg / 5085 g 49.9 N 3 379 Gs	4.58 kg / 4576 g 44.9 N ~0 Gs
5 mm	4.15 kg / 4153 g 40.7 N 3 053 Gs	3.74 kg / 3738 g 36.7 N ~0 Gs
10 mm	2.15 kg / 2153 g 21.1 N 2 199 Gs	1.94 kg / 1938 g 19.0 N ~0 Gs
20 mm	0.46 kg / 460 g 4.5 N 1 016 Gs	0.41 kg / 414 g 4.1 N ~0 Gs
50 mm	0.01 kg / 10 g 0.1 N 153 Gs	0.01 kg / 9 g 0.1 N ~0 Gs

Two magnetic products attract each other from a wider radius than a magnet and steel setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of action. Designing a powerful holder? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is massive. The levitation is slightly lower than the attraction, but still significant.
*Field value in repulsion mode drops to ~0 Gs at the midpoint of the gap (resulting from vector opposition).

Table 7: Hazards (implants) - precautionary measures
MPL 17x17x3 / 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
Mechanical watch	20 Gs (2.0 mT)	4.5 cm
Mobile device	40 Gs (4.0 mT)	3.5 cm
Car key	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation is a serious hazard to IT equipment and medical implants. These magnets produce a flux that destroys function of digital equipment. Notice: the unseen radiation acts through matter and housings. Increased vigilance must be taken by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 17x17x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	23.45 km/h (6.52 m/s)	0.14 J
30 mm	38.89 km/h (10.80 m/s)	0.38 J
50 mm	50.19 km/h (13.94 m/s)	0.63 J
100 mm	70.98 km/h (19.72 m/s)	1.26 J

NdFeB products are delicate – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or injury to skin. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 17x17x3 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MPL 17x17x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 509 Mx	65.1 µWb
P_c Coefficient	0.23	Low (Flat)

Flux value passing through the magnet pole. Essential parameter for generator designers and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 17x17x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.22 kg	Standard
Water (riverbed)	3.69 kg (+0.47 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!

In water, the magnet feels stronger thanks to Archimedes' principle. 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 just a fraction of its perpendicular strength.

2. Steel saturation

*Thin metal sheet (e.g. computer case) severely limits the holding force.

3. Thermal stability

*For standard magnets, 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) = 0.23

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.

Engineering data and GPSR

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

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: 020124-2025

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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 17x17x3 mm and a weight of 6.5 g, guarantees premium class connection. This magnetic block with a force of 31.54 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.

Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 17x17x3 / 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.

Plate magnets MPL 17x17x3 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.

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. 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. In practice, this means that this magnet has the greatest attraction force on its main planes (17x17 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.

This model is characterized by dimensions 17x17x3 mm, which, at a weight of 6.5 g, makes it an element with high energy density. The key parameter here is the lifting capacity amounting to approximately 3.22 kg (force ~31.54 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of neodymium magnets.

Benefits

Apart from their consistent power, neodymium magnets have these key benefits:

They do not lose strength, even over around ten years – the decrease in lifting capacity is only ~1% (according to tests),
They do not lose their magnetic properties even under close interference source,
The use of an refined finish of noble metals (nickel, gold, silver) causes the element to present itself better,
They show high magnetic induction at the operating surface, which increases their power,
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 ability of free shaping and adaptation to individualized needs, magnetic components can be manufactured in a wide range of forms and dimensions, which amplifies use scope,
Significant place in innovative solutions – they are commonly used in hard drives, electric drive systems, precision medical tools, and complex engineering applications.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets: tips and applications.

At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. 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 stable to moisture, when using outdoors
We recommend casing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these products can disrupt the diagnostic process medical when they are in the body.
Due to neodymium price, their price is relatively high,

Lifting parameters

Detachment force of the magnet in optimal conditions – what it depends on?

The load parameter shown refers to the maximum value, recorded under optimal environment, namely:

on a plate made of structural steel, effectively closing the magnetic field
possessing a thickness of at least 10 mm to ensure full flux closure
with an ideally smooth contact surface
under conditions of no distance (surface-to-surface)
for force acting at a right angle (pull-off, not shear)
at standard ambient temperature

Magnet lifting force in use – key factors

In real-world applications, the real power results from several key aspects, presented from crucial:

Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Steel thickness – insufficiently thick steel does not close the flux, causing part of the power to be wasted to the other side.
Steel grade – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
Thermal environment – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Warnings

Bone fractures

Danger of trauma: The pulling power is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Phone sensors

Remember: rare earth magnets generate a field that confuses precision electronics. Keep a safe distance from your phone, device, and GPS.

Life threat

For implant holders: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Product not for children

NdFeB magnets are not suitable for play. Swallowing several magnets may result in them attracting across intestines, which poses a severe health hazard and necessitates urgent medical intervention.

Power loss in heat

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets will cause them breaking into small pieces.

Machining danger

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Nickel allergy

Studies show that nickel (the usual finish) is a common allergen. For allergy sufferers, avoid direct skin contact or select encased magnets.

Respect the power

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

Safe distance

Equipment safety: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Danger! Details about hazards in the article: Safety of working with magnets.

MPL 17x17x3 / N38 - lamellar magnet

Product card - MPL 17x17x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - report

Table 1: Static force (pull vs distance) - power drop MPL 17x17x3 / N38

Table 2: Vertical force (vertical surface) MPL 17x17x3 / N38

Table 3: Wall mounting (shearing) - vertical pull MPL 17x17x3 / N38

Table 4: Steel thickness (substrate influence) - power losses MPL 17x17x3 / N38

Table 5: Working in heat (material behavior) - resistance threshold MPL 17x17x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MPL 17x17x3 / N38

Table 7: Hazards (implants) - precautionary measures MPL 17x17x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 17x17x3 / N38

Table 9: Anti-corrosion coating durability MPL 17x17x3 / N38

Table 10: Construction data (Flux) MPL 17x17x3 / N38

Table 11: Underwater work (magnet fishing) MPL 17x17x3 / N38

1. Sliding resistance

2. Steel saturation

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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Strengths and weaknesses of neodymium magnets.

Benefits

Disadvantages

Lifting parameters

Detachment force of the magnet in optimal conditions – what it depends on?

Magnet lifting force in use – key factors

Warnings

Bone fractures

Phone sensors

Life threat

Product not for children

Power loss in heat

Eye protection

Machining danger

Nickel allergy

Respect the power

Safe distance

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MPL 17x17x3 / N38

Table 2: Vertical force (vertical surface)
MPL 17x17x3 / N38

Table 3: Wall mounting (shearing) - vertical pull
MPL 17x17x3 / N38

Table 4: Steel thickness (substrate influence) - power losses
MPL 17x17x3 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MPL 17x17x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 17x17x3 / N38

Table 7: Hazards (implants) - precautionary measures
MPL 17x17x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 17x17x3 / N38

Table 9: Anti-corrosion coating durability
MPL 17x17x3 / N38

Table 10: Construction data (Flux)
MPL 17x17x3 / N38

Table 11: Underwater work (magnet fishing)
MPL 17x17x3 / N38