Product available Ships today (order by 14:00)

MPL 30x20x4 / 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: PLN 1-6500
Rating: 5

lamellar magnet

Catalog no 020286

GTIN/EAN: 5906301811848

length

30 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

18 g

Magnetization Direction

↑ axial

Load capacity

6.30 kg / 61.84 N

Magnetic Induction

180.57 mT / 1806 Gs

Coating

[NiCuNi] Nickel

view properties »

10.23 ZŁ with VAT / pcs + price for transport

8.32 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

8.32 ZŁ

10.23 ZŁ

price from 100 pcs

7.82 ZŁ

9.62 ZŁ

price from 350 pcs

7.32 ZŁ

9.01 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Hunting for a discount?

Call us now +48 22 499 98 98 otherwise send us a note using inquiry form the contact form page.
Lifting power along with shape of a neodymium magnet can be estimated using our online calculation tool.

Same-day processing for orders placed before 14:00.

Physical properties - MPL 30x20x4 / N38 - lamellar magnet

Specification / characteristics - MPL 30x20x4 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020286
GTIN/EAN	5906301811848
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
length	30 mm [±0,1 mm]
Width	20 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	18 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.30 kg / 61.84 N
Magnetic Induction ~ ?	180.57 mT / 1806 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x20x4 / 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 assembly - report

The following information are the result of a engineering simulation. Results are based on models for the class Nd₂Fe₁₄B. Actual conditions may differ from theoretical values. Use these calculations as a reference point for designers.

Table 1: Static pull force (force vs gap) - characteristics
MPL 30x20x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1805 Gs 180.5 mT	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N	warning
1 mm	1728 Gs 172.8 mT	5.77 kg / 12.72 lbs 5771.5 g / 56.6 N	warning
2 mm	1628 Gs 162.8 mT	5.13 kg / 11.30 lbs 5125.7 g / 50.3 N	warning
3 mm	1515 Gs 151.5 mT	4.43 kg / 9.78 lbs 4434.6 g / 43.5 N	warning
5 mm	1271 Gs 127.1 mT	3.12 kg / 6.89 lbs 3124.3 g / 30.6 N	warning
10 mm	751 Gs 75.1 mT	1.09 kg / 2.40 lbs 1088.7 g / 10.7 N	weak grip
15 mm	435 Gs 43.5 mT	0.37 kg / 0.81 lbs 366.3 g / 3.6 N	weak grip
20 mm	262 Gs 26.2 mT	0.13 kg / 0.29 lbs 132.6 g / 1.3 N	weak grip
30 mm	110 Gs 11.0 mT	0.02 kg / 0.05 lbs 23.2 g / 0.2 N	weak grip
50 mm	30 Gs 3.0 mT	0.00 kg / 0.00 lbs 1.8 g / 0.0 N	weak grip

Magnetic force weakens significantly with every subsequent millimeter of spacing. Remember that even the smallest gap (e.g., contamination, paint, rust) strongly weakens the grip. Magnets hold strongest in perfect adhesion; air break weakens the power. Observe how rapidly the parameters drop, when the magnet does not adhere flatly to the metal substrate. When planning the arrangement, discard redundant distances.

Table 2: Sliding hold (wall)
MPL 30x20x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.26 kg / 2.78 lbs 1260.0 g / 12.4 N
1 mm	Stal (~0.2)	1.15 kg / 2.54 lbs 1154.0 g / 11.3 N
2 mm	Stal (~0.2)	1.03 kg / 2.26 lbs 1026.0 g / 10.1 N
3 mm	Stal (~0.2)	0.89 kg / 1.95 lbs 886.0 g / 8.7 N
5 mm	Stal (~0.2)	0.62 kg / 1.38 lbs 624.0 g / 6.1 N
10 mm	Stal (~0.2)	0.22 kg / 0.48 lbs 218.0 g / 2.1 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 lbs 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 26.0 g / 0.3 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

This section presents the theoretical shear load necessary to initiate the sliding of the magnet down on a vertical metal surface (assuming typical friction coefficient). The holding force depends on the separation distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 30x20x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.89 kg / 4.17 lbs 1890.0 g / 18.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.26 kg / 2.78 lbs 1260.0 g / 12.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.63 kg / 1.39 lbs 630.0 g / 6.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.15 kg / 6.94 lbs 3150.0 g / 30.9 N

When hanging a magnet on a vertical wall (e.g., a fridge), it will maintain barely approx. 20%-30% of its nominal power. Gravity as well as a low friction coefficient cause that products slide down easier than they pull off. Planning a hanger? Consider that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will give way down under a significantly smaller load. Utilizing a rubberized pad can effectively improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 30x20x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.63 kg / 1.39 lbs 630.0 g / 6.2 N
1 mm	25%	1.58 kg / 3.47 lbs 1575.0 g / 15.5 N
2 mm	50%	3.15 kg / 6.94 lbs 3150.0 g / 30.9 N
3 mm	75%	4.73 kg / 10.42 lbs 4725.0 g / 46.4 N
5 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
10 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
11 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N
12 mm	100%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N

A thin sheet cannot absorb the entire magnetic field, which weakens actual performance of the magnet. If you install a neodymium to a too thin substrate, the field will pass right through and the pull force will drop sharply. To utilize full efficiency of this neodymium's power, you require a sufficiently solid backing of metal. The saturation effect means that on thin elements (e.g., appliance housings), 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 30x20x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.30 kg / 13.89 lbs 6300.0 g / 61.8 N	OK
40 °C	-2.2%	6.16 kg / 13.58 lbs 6161.4 g / 60.4 N	OK
60 °C	-4.4%	6.02 kg / 13.28 lbs 6022.8 g / 59.1 N
80 °C	-6.6%	5.88 kg / 12.97 lbs 5884.2 g / 57.7 N
100 °C	-28.8%	4.49 kg / 9.89 lbs 4485.6 g / 44.0 N

Ordinary NdFeB products irreversibly lose power after exceeding the maximum temperature. Protect against heat – heat can irreversibly damage this magnet. As the temperature rises, the neodymium's capacity temporarily decreases. Refrain from using this product in hot environments higher than its operating temperature limit. Too high temperature will lead to irreversible degradation of magnetic properties.

*Important note: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties at lower temperatures than long magnets. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field range
MPL 30x20x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	12.06 kg / 26.58 lbs 3 198 Gs	1.81 kg / 3.99 lbs 1809 g / 17.7 N	N/A
1 mm	11.59 kg / 25.55 lbs 3 540 Gs	1.74 kg / 3.83 lbs 1739 g / 17.1 N	10.43 kg / 23.00 lbs ~0 Gs
2 mm	11.05 kg / 24.35 lbs 3 456 Gs	1.66 kg / 3.65 lbs 1657 g / 16.3 N	9.94 kg / 21.92 lbs ~0 Gs
3 mm	10.45 kg / 23.03 lbs 3 361 Gs	1.57 kg / 3.45 lbs 1567 g / 15.4 N	9.40 kg / 20.73 lbs ~0 Gs
5 mm	9.15 kg / 20.18 lbs 3 146 Gs	1.37 kg / 3.03 lbs 1373 g / 13.5 N	8.24 kg / 18.16 lbs ~0 Gs
10 mm	5.98 kg / 13.18 lbs 2 543 Gs	0.90 kg / 1.98 lbs 897 g / 8.8 N	5.38 kg / 11.86 lbs ~0 Gs
20 mm	2.08 kg / 4.59 lbs 1 501 Gs	0.31 kg / 0.69 lbs 313 g / 3.1 N	1.88 kg / 4.13 lbs ~0 Gs
50 mm	0.10 kg / 0.22 lbs 331 Gs	0.02 kg / 0.03 lbs 15 g / 0.1 N	0.09 kg / 0.20 lbs ~0 Gs
60 mm	0.04 kg / 0.10 lbs 219 Gs	0.01 kg / 0.01 lbs 7 g / 0.1 N	0.04 kg / 0.09 lbs ~0 Gs
70 mm	0.02 kg / 0.05 lbs 151 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
80 mm	0.01 kg / 0.02 lbs 108 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs
90 mm	0.01 kg / 0.01 lbs 80 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.01 lbs 60 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets attract each other from a much further distance than a magnet and sheet setup. Such a system of magnet-to-magnet produces a massive flux and a further horizon of action. Planning to create a solid fastener? Apply two magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the pinch force is huge. The repulsion force is a bit weaker than the attraction, but still impressive.
*The magnetic induction in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Note: Figures refer to shear force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - warnings
MPL 30x20x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.0 cm
Hearing aid	10 Gs (1.0 mT)	7.5 cm
Mechanical watch	20 Gs (2.0 mT)	6.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.5 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a large risk to electronic devices and medical implants. These NdFeB products produce a flux that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and glass. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, speakers, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x20x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.81 km/h (5.78 m/s)	0.30 J
30 mm	32.75 km/h (9.10 m/s)	0.75 J
50 mm	42.20 km/h (11.72 m/s)	1.24 J
100 mm	59.66 km/h (16.57 m/s)	2.47 J

Neodymium magnets are delicate – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MPL 30x20x4 / 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 30x20x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	12 775 Mx	127.8 µWb
P_c Coefficient	0.22	Low (Flat)

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

Table 11: Physics of underwater searching
MPL 30x20x4 / N38

Environment	Effective steel pull	Effect
Air (land)	6.30 kg	Standard
Water (riverbed)	7.21 kg (+0.91 kg buoyancy gain)	+14.5%

Corrosion warning: 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains only a fraction of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Power loss vs temp

*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) = 0.22

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

Elemental analysis

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: 020286-2026

Magnet Unit Converter

Magnet pull force

Kilograms (kg)

Newtons (N)

Pounds (lbs)

Field Strength

Induction (Gs)

Tesla (T)

Simply complete any input, to let the converter calculate everything else instantly.

Check out more products

Product available Ships today (order by 14:00)

MPL 10x7x3 / N38 - lamellar magnet

0.849 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMS 75x19x10.5x18 / N38 - conical magnetic holder

125.56 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 32x275 [2xM8] / N42 - magnetic separator

824.10 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

200.00 ZŁ brutto / pcs

Model MPL 30x20x4 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 6.30 kg), this product is available off-the-shelf from our warehouse in Poland. 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. Watch your fingers! Magnets with a force of 6.30 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.

They constitute a key element in the production of wind generators and material handling systems. 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.

For mounting flat magnets MPL 30x20x4 / N38, it is best to use two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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).

Standardly, the MPL 30x20x4 / N38 model is magnetized through the thickness (dimension 4 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (30x20 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 30x20x4 mm, which, at a weight of 18 g, makes it an element with high energy density. It is a magnetic block with dimensions 30x20x4 mm and a self-weight of 18 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Strengths as well as weaknesses of neodymium magnets.

Advantages

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

Their power is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
They maintain their magnetic properties even under strong external field,
By covering with a smooth layer of nickel, the element gains an nice look,
The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
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 exact modeling as well as adjusting to precise requirements,
Wide application in advanced technology sectors – they serve a role in data components, electromotive mechanisms, medical devices, also complex engineering applications.
Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

Characteristics of disadvantages of neodymium magnets: tips and applications.

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
We recommend casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to complicate diagnosis medical in case of swallowing.
Due to neodymium price, their price is relatively high,

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

The specified lifting capacity refers to the maximum value, measured under optimal environment, meaning:

on a plate made of mild steel, effectively closing the magnetic flux
possessing a thickness of at least 10 mm to ensure full flux closure
with an ideally smooth contact surface
without any insulating layer between the magnet and steel
during pulling in a direction vertical to the mounting surface
at conditions approx. 20°C

Determinants of practical lifting force of a magnet

In real-world applications, the real power is determined by several key aspects, listed from most significant:

Distance (betwixt the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
Angle of force application – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
Steel thickness – too thin plate does not close the flux, causing part of the flux to be escaped to the other side.
Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets

Data carriers

Avoid bringing magnets near a purse, computer, or TV. The magnetism can destroy these devices and erase data from cards.

GPS and phone interference

Note: neodymium magnets produce a field that interferes with precision electronics. Maintain a separation from your mobile, device, and GPS.

Do not underestimate power

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

Physical harm

Large magnets can break fingers instantly. Under no circumstances put your hand betwixt two strong magnets.

Maximum temperature

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Beware of splinters

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

Machining danger

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Implant safety

People with a pacemaker must maintain an absolute distance from magnets. The magnetic field can disrupt the operation of the life-saving device.

Skin irritation risks

A percentage of the population suffer from a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Extended handling may cause a rash. It is best to wear protective gloves.

Adults only

Strictly store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are fatal.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?

MPL 30x20x4 / N38 - lamellar magnet

Physical properties - MPL 30x20x4 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the assembly - report

Table 1: Static pull force (force vs gap) - characteristics MPL 30x20x4 / N38

Table 2: Sliding hold (wall) MPL 30x20x4 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MPL 30x20x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MPL 30x20x4 / N38

Table 5: Thermal resistance (material behavior) - power drop MPL 30x20x4 / N38

Table 6: Two magnets (attraction) - field range MPL 30x20x4 / N38

Table 7: Hazards (implants) - warnings MPL 30x20x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 30x20x4 / N38

Table 9: Corrosion resistance MPL 30x20x4 / N38

Table 10: Electrical data (Pc) MPL 30x20x4 / N38

Table 11: Physics of underwater searching MPL 30x20x4 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Power loss vs temp

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

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Field Strength

Check out more products

MPL 10x7x3 / N38 - lamellar magnet

UMS 75x19x10.5x18 / N38 - conical magnetic holder

SM 32x275 [2xM8] / N42 - magnetic separator

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

Strengths as well as weaknesses of neodymium magnets.

Advantages

Limitations

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

Determinants of practical lifting force of a magnet

H&S for magnets

Data carriers

GPS and phone interference

Do not underestimate power

Physical harm

Maximum temperature

Beware of splinters

Machining danger

Implant safety

Skin irritation risks

Adults only

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MPL 30x20x4 / N38

Table 2: Sliding hold (wall)
MPL 30x20x4 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 30x20x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 30x20x4 / N38

Table 5: Thermal resistance (material behavior) - power drop
MPL 30x20x4 / N38

Table 6: Two magnets (attraction) - field range
MPL 30x20x4 / N38

Table 7: Hazards (implants) - warnings
MPL 30x20x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 30x20x4 / N38

Table 9: Corrosion resistance
MPL 30x20x4 / N38

Table 10: Electrical data (P_c)
MPL 30x20x4 / N38

Table 11: Physics of underwater searching
MPL 30x20x4 / N38