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MP 25x12.5x5 / N38 - ring magnet

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

ring magnet

Catalog no 030342

GTIN/EAN: 5906301812289

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

12.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

13.81 g

Magnetization Direction

↑ axial

Load capacity

5.98 kg / 58.67 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

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6.20 ZŁ with VAT / pcs + price for transport

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Technical specification of the product - MP 25x12.5x5 / N38 - ring magnet

Specification / characteristics - MP 25x12.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030342
GTIN/EAN	5906301812289
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter	25 mm [±0,1 mm]
internal diameter Ø	12.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	13.81 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.98 kg / 58.67 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x12.5x5 / N38 - ring 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 analysis of the assembly - data

These information constitute the outcome of a engineering simulation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - power drop
MP 25x12.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N	strong
1 mm	5310 Gs 531.0 mT	5.05 kg / 11.14 LBS 5051.8 g / 49.6 N	strong
2 mm	4846 Gs 484.6 mT	4.21 kg / 9.27 LBS 4206.8 g / 41.3 N	strong
3 mm	4397 Gs 439.7 mT	3.46 kg / 7.64 LBS 3464.5 g / 34.0 N	strong
5 mm	3576 Gs 357.6 mT	2.29 kg / 5.05 LBS 2291.1 g / 22.5 N	strong
10 mm	2073 Gs 207.3 mT	0.77 kg / 1.70 LBS 769.7 g / 7.6 N	safe
15 mm	1231 Gs 123.1 mT	0.27 kg / 0.60 LBS 271.6 g / 2.7 N	safe
20 mm	773 Gs 77.3 mT	0.11 kg / 0.24 LBS 106.9 g / 1.0 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.05 LBS 22.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 LBS 2.4 g / 0.0 N	safe

Pulling power decreases drastically per each millimeter of spacing. Remember that every additional insulation layer (e.g., dirt, varnish, rust) significantly reduces the pull force. Neodymiums work most effectively in perfect adhesion; air break nullifies the power. Notice how flashily the load capacity drop, when the product does not adhere directly to the metal substrate. When planning the mounting, discard additional spacers.

Table 2: Vertical force (wall)
MP 25x12.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.20 kg / 2.64 LBS 1196.0 g / 11.7 N
1 mm	Stal (~0.2)	1.01 kg / 2.23 LBS 1010.0 g / 9.9 N
2 mm	Stal (~0.2)	0.84 kg / 1.86 LBS 842.0 g / 8.3 N
3 mm	Stal (~0.2)	0.69 kg / 1.53 LBS 692.0 g / 6.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.01 LBS 458.0 g / 4.5 N
10 mm	Stal (~0.2)	0.15 kg / 0.34 LBS 154.0 g / 1.5 N
15 mm	Stal (~0.2)	0.05 kg / 0.12 LBS 54.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 LBS 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The table below defines the theoretical force sufficient to start the downward movement of the magnet downwards along a vertical metal surface (assuming standard friction). This value is a function of the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 25x12.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.79 kg / 3.96 LBS 1794.0 g / 17.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.20 kg / 2.64 LBS 1196.0 g / 11.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.60 kg / 1.32 LBS 598.0 g / 5.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.99 kg / 6.59 LBS 2990.0 g / 29.3 N

When mounting a element on a vertical wall (e.g., a fridge), it will maintain only about 1/5 of its nominal power. Gravity as well as a low friction coefficient influence the fact that magnets move down faster than they pop off the substrate. Designing a wall mount? Note that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the element will slide down under a significantly smaller load. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.60 kg / 1.32 LBS 598.0 g / 5.9 N
1 mm	25%	1.50 kg / 3.30 LBS 1495.0 g / 14.7 N
2 mm	50%	2.99 kg / 6.59 LBS 2990.0 g / 29.3 N
3 mm	75%	4.49 kg / 9.89 LBS 4485.0 g / 44.0 N
5 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
10 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
11 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
12 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N

A too thin steel is incapable of focus the full magnetic flux, which wastes potential of the holder. Should you install a neodymium to a too thin substrate, the flux will penetrate right through and the attraction force will be weaker. To squeeze 100% of this magnet's potential, you require a sufficiently solid element of steel. The saturation effect means that on delicate walls (e.g., car bodies), the magnet works worse. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal resistance (stability) - power drop
MP 25x12.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N	OK
40 °C	-2.2%	5.85 kg / 12.89 LBS 5848.4 g / 57.4 N	OK
60 °C	-4.4%	5.72 kg / 12.60 LBS 5716.9 g / 56.1 N	OK
80 °C	-6.6%	5.59 kg / 12.31 LBS 5585.3 g / 54.8 N
100 °C	-28.8%	4.26 kg / 9.39 LBS 4257.8 g / 41.8 N

Ordinary NdFeB products lose power after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly demagnetize this product. With increasing heat, the magnet's capacity temporarily decreases. Avoid using this product close to ovens higher than its operating temperature limit. Too high temperature will lead to permanent loss of magnetic properties.

*Engineering note: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) risk losing magnetic properties under lower heat stress than taller cylinders. Warning indicator in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MP 25x12.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	82.42 kg / 181.72 LBS 6 082 Gs	12.36 kg / 27.26 LBS 12364 g / 121.3 N	N/A
1 mm	75.95 kg / 167.44 LBS 11 091 Gs	11.39 kg / 25.12 LBS 11392 g / 111.8 N	68.35 kg / 150.69 LBS ~0 Gs
2 mm	69.63 kg / 153.51 LBS 10 620 Gs	10.44 kg / 23.03 LBS 10445 g / 102.5 N	62.67 kg / 138.16 LBS ~0 Gs
3 mm	63.64 kg / 140.29 LBS 10 153 Gs	9.55 kg / 21.04 LBS 9545 g / 93.6 N	57.27 kg / 126.26 LBS ~0 Gs
5 mm	52.69 kg / 116.16 LBS 9 238 Gs	7.90 kg / 17.42 LBS 7903 g / 77.5 N	47.42 kg / 104.54 LBS ~0 Gs
10 mm	31.58 kg / 69.62 LBS 7 152 Gs	4.74 kg / 10.44 LBS 4737 g / 46.5 N	28.42 kg / 62.66 LBS ~0 Gs
20 mm	10.61 kg / 23.39 LBS 4 145 Gs	1.59 kg / 3.51 LBS 1591 g / 15.6 N	9.55 kg / 21.05 LBS ~0 Gs
50 mm	0.65 kg / 1.43 LBS 1 024 Gs	0.10 kg / 0.21 LBS 97 g / 1.0 N	0.58 kg / 1.28 LBS ~0 Gs
60 mm	0.31 kg / 0.69 LBS 712 Gs	0.05 kg / 0.10 LBS 47 g / 0.5 N	0.28 kg / 0.62 LBS ~0 Gs
70 mm	0.16 kg / 0.36 LBS 514 Gs	0.02 kg / 0.05 LBS 24 g / 0.2 N	0.15 kg / 0.32 LBS ~0 Gs
80 mm	0.09 kg / 0.20 LBS 383 Gs	0.01 kg / 0.03 LBS 14 g / 0.1 N	0.08 kg / 0.18 LBS ~0 Gs
90 mm	0.05 kg / 0.12 LBS 293 Gs	0.01 kg / 0.02 LBS 8 g / 0.1 N	0.05 kg / 0.11 LBS ~0 Gs
100 mm	0.03 kg / 0.07 LBS 230 Gs	0.00 kg / 0.01 LBS 5 g / 0.0 N	0.03 kg / 0.06 LBS ~0 Gs

Two magnets interact from a wider radius than a magnet and steel setup. Such a system of magnet-to-magnet generates a stronger field and a wider radius of operation. Designing a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the collision energy is massive. The repulsion force is marginally weaker than the attraction, but still large.
*Flux density between like poles reaches ~0 Gs at the geometric center of the gap (due to field cancellation).
Attention: Results demonstrate sliding force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x12.5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Timepiece	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Remote	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

A strong magnetic field is a real danger to electronics as well as medical implants. These magnets generate a flux that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and plastic. Exceptional care must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MP 25x12.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.61 km/h (6.28 m/s)	0.27 J
30 mm	36.44 km/h (10.12 m/s)	0.71 J
50 mm	46.94 km/h (13.04 m/s)	1.17 J
100 mm	66.37 km/h (18.43 m/s)	2.35 J

Magnetic elements are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or injury to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when working with large magnets.

Table 9: Corrosion resistance
MP 25x12.5x5 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 25x12.5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 536 Mx	245.4 µWb
P_c Coefficient	1.03	High (Stable)

Flux value passing through the magnet pole. Essential parameter in coil applications as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 25x12.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.98 kg	Standard
Water (riverbed)	6.85 kg (+0.87 kg buoyancy gain)	+14.5%

Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains merely ~20% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 1.03

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

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%

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: 030342-2026

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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Mounting is clean and reversible, unlike gluing. This product with a force of 5.98 kg works great as a door latch, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 25x12.5x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.

The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

It is a magnetic ring with a diameter of 25 mm and thickness 5 mm. The key parameter here is the lifting capacity amounting to approximately 5.98 kg (force ~58.67 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 12.5 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of rare earth magnets.

Benefits

Besides their high retention, neodymium magnets are valued for these benefits:

They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
They possess excellent resistance to magnetic field loss when exposed to external fields,
A magnet with a metallic silver surface has an effective appearance,
They show high magnetic induction at the operating surface, which improves attraction properties,
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...
Thanks to the possibility of free shaping and adaptation to unique solutions, magnetic components can be manufactured in a wide range of shapes and sizes, which increases their versatility,
Key role in advanced technology sectors – they are utilized in hard drives, drive modules, medical devices, and technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:

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.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Due to limitations in realizing threads and complex shapes in magnets, we recommend using cover - magnetic mount.
Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these products are able to be problematic in diagnostics medical when they are in the body.
With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

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

Magnet power was defined for optimal configuration, taking into account:

with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
whose transverse dimension reaches at least 10 mm
with a plane perfectly flat
without any clearance between the magnet and steel
under perpendicular force vector (90-degree angle)
at standard ambient temperature

Determinants of lifting force in real conditions

In practice, the actual lifting capacity depends on a number of factors, ranked from the most important:

Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
Metal type – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets

Electronic hazard

Intense magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Implant safety

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Choking Hazard

These products are not intended for children. Eating a few magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness occurs, cease handling magnets and use protective gear.

Handling rules

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Material brittleness

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Combustion hazard

Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Heat sensitivity

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Compass and GPS

Be aware: rare earth magnets produce a field that disrupts precision electronics. Keep a safe distance from your phone, device, and navigation systems.

Physical harm

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

Safety First! Learn more about risks in the article: Safety of working with magnets.

MP 25x12.5x5 / N38 - ring magnet

Technical specification of the product - MP 25x12.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - data

Table 1: Static pull force (force vs distance) - power drop MP 25x12.5x5 / N38

Table 2: Vertical force (wall) MP 25x12.5x5 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 25x12.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses MP 25x12.5x5 / N38

Table 5: Thermal resistance (stability) - power drop MP 25x12.5x5 / N38

Table 6: Two magnets (attraction) - field range MP 25x12.5x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MP 25x12.5x5 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 25x12.5x5 / N38

Table 9: Corrosion resistance MP 25x12.5x5 / N38

Table 10: Electrical data (Flux) MP 25x12.5x5 / N38

Table 11: Underwater work (magnet fishing) MP 25x12.5x5 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Temperature resistance

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Field Strength

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Advantages as well as disadvantages of rare earth magnets.

Benefits

Cons

Lifting parameters

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

Determinants of lifting force in real conditions

Precautions when working with neodymium magnets

Electronic hazard

Implant safety

Choking Hazard

Sensitization to coating

Handling rules

Material brittleness

Combustion hazard

Heat sensitivity

Compass and GPS

Physical harm

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MP 25x12.5x5 / N38

Table 2: Vertical force (wall)
MP 25x12.5x5 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 25x12.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Table 5: Thermal resistance (stability) - power drop
MP 25x12.5x5 / N38

Table 6: Two magnets (attraction) - field range
MP 25x12.5x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x12.5x5 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 25x12.5x5 / N38

Table 9: Corrosion resistance
MP 25x12.5x5 / N38

Table 10: Electrical data (Flux)
MP 25x12.5x5 / N38

Table 11: Underwater work (magnet fishing)
MP 25x12.5x5 / N38