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MPL 5x5x1.2 / 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 020171

GTIN/EAN: 5906301811770

5.00

length

5 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

1.2 mm [±0,1 mm]

Weight

0.22 g

Magnetization Direction

↑ axial

Load capacity

0.44 kg / 4.28 N

Magnetic Induction

245.17 mT / 2452 Gs

Coating

[NiCuNi] Nickel

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0.1845 ZŁ with VAT / pcs + price for transport

0.1500 ZŁ net + 23% VAT / pcs

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Technical - MPL 5x5x1.2 / N38 - lamellar magnet

Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020171
GTIN/EAN	5906301811770
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	5 mm [±0,1 mm]
Width	5 mm [±0,1 mm]
Height	1.2 mm [±0,1 mm]
Weight	0.22 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.44 kg / 4.28 N
Magnetic Induction ~ ?	245.17 mT / 2452 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.2 / 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 product - data

The following values are the result of a mathematical calculation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Actual performance may deviate from the simulation results. Use these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs gap) - power drop
MPL 5x5x1.2 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2450 Gs 245.0 mT	0.44 kg / 440.0 g 4.3 N	safe
1 mm	1739 Gs 173.9 mT	0.22 kg / 221.8 g 2.2 N	safe
2 mm	1054 Gs 105.4 mT	0.08 kg / 81.4 g 0.8 N	safe
3 mm	622 Gs 62.2 mT	0.03 kg / 28.4 g 0.3 N	safe
5 mm	241 Gs 24.1 mT	0.00 kg / 4.3 g 0.0 N	safe
10 mm	45 Gs 4.5 mT	0.00 kg / 0.1 g 0.0 N	safe
15 mm	15 Gs 1.5 mT	0.00 kg / 0.0 g 0.0 N	safe
20 mm	7 Gs 0.7 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	2 Gs 0.2 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	0 Gs 0.0 mT	0.00 kg / 0.0 g 0.0 N	safe

Pulling power decreases sharply with every subsequent millimeter of spacing. Note that even a very thin break (e.g., dirt, paint, veneer) strongly weakens the grip. Magnetic products operate most effectively during direct contact; air break kills the power. Observe how rapidly the parameters fall, when the magnet does not adhere flatly to the steel surface. When calculating the arrangement, eliminate redundant distances.

Table 2: Vertical capacity (vertical surface)
MPL 5x5x1.2 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.09 kg / 88.0 g 0.9 N
1 mm	Stal (~0.2)	0.04 kg / 44.0 g 0.4 N
2 mm	Stal (~0.2)	0.02 kg / 16.0 g 0.2 N
3 mm	Stal (~0.2)	0.01 kg / 6.0 g 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 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 shows the estimated holding capacity required to initiate the sliding of the magnet downwards on a upright steel wall (considering standard friction coefficient). The holding force is a function of the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 5x5x1.2 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.13 kg / 132.0 g 1.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.09 kg / 88.0 g 0.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.04 kg / 44.0 g 0.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.22 kg / 220.0 g 2.2 N

When mounting a element on a upright wall (e.g., a car body), it will only hold just about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient cause that magnets move down faster than they pop off the substrate. Designing a vertical fastening? Remember that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the element will slide down under a much lighter cargo. Using a rubber coating can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 5x5x1.2 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.04 kg / 44.0 g 0.4 N
1 mm	25%	0.11 kg / 110.0 g 1.1 N
2 mm	50%	0.22 kg / 220.0 g 2.2 N
5 mm	100%	0.44 kg / 440.0 g 4.3 N
10 mm	100%	0.44 kg / 440.0 g 4.3 N

A thin sheet is not enough to absorb the entire magnetic field, which weakens actual performance of the holder. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the attraction force will be weaker. To achieve 100% of this magnet's power, you need a suitably thick element of metal. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the magnet works worse. We recommend selecting the steel dimension from these parameters.

Table 5: Working in heat (material behavior) - power drop
MPL 5x5x1.2 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.44 kg / 440.0 g 4.3 N	OK
40 °C	-2.2%	0.43 kg / 430.3 g 4.2 N	OK
60 °C	-4.4%	0.42 kg / 420.6 g 4.1 N
80 °C	-6.6%	0.41 kg / 411.0 g 4.0 N
100 °C	-28.8%	0.31 kg / 313.3 g 3.1 N

Ordinary NdFeB products change their properties parameters after exceeding the maximum temperature. Watch out for overheating – heat can permanently destroy this magnet. With increasing heat, the magnet's power briefly decreases. Refrain from using this product close to heaters higher than its safe range. Too high temperature will cause irreversible degradation of magnetism.

*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 5x5x1.2 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	0.92 kg / 925 g 9.1 N 4 027 Gs	N/A
1 mm	0.70 kg / 699 g 6.9 N 4 260 Gs	0.63 kg / 629 g 6.2 N ~0 Gs
2 mm	0.47 kg / 466 g 4.6 N 3 478 Gs	0.42 kg / 420 g 4.1 N ~0 Gs
3 mm	0.29 kg / 288 g 2.8 N 2 734 Gs	0.26 kg / 259 g 2.5 N ~0 Gs
5 mm	0.10 kg / 101 g 1.0 N 1 617 Gs	0.09 kg / 91 g 0.9 N ~0 Gs
10 mm	0.01 kg / 9 g 0.1 N 482 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
20 mm	0.00 kg / 0 g 0.0 N 90 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 7 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a much further distance than a neodymium and metal setup. The connection of magnet-to-magnet produces a massive flux and a larger range of operation. Planning to create a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the impact force is extreme. The levitation is a bit weaker than the attraction, but still large.
*Field value in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).

Table 7: Protective zones (electronics) - warnings
MPL 5x5x1.2 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	2.5 cm
Hearing aid	10 Gs (1.0 mT)	2.0 cm
Mechanical watch	20 Gs (2.0 mT)	1.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.0 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation is a real danger to electronics and pacemakers. These neodymiums generate a field that disrupts operation of digital equipment. Remember: the unseen radiation acts through matter and glass. Exceptional care must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - warning
MPL 5x5x1.2 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	45.11 km/h (12.53 m/s)	0.02 J
30 mm	78.12 km/h (21.70 m/s)	0.05 J
50 mm	100.85 km/h (28.01 m/s)	0.09 J
100 mm	142.63 km/h (39.62 m/s)	0.17 J

Neodymium magnets are very brittle – a collision with steel causes immediate chipping. Watch the impact speed – a magnet released freely turns into a projectile. Kinetic force can destroy the magnet or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 5x5x1.2 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MPL 5x5x1.2 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	695 Mx	7.0 µWb
P_c Coefficient	0.30	Low (Flat)

Flux value emitted by the magnet pole. Key data for generator designers and motors. P_c value determines the magnet's operating point.

Table 11: Submerged application
MPL 5x5x1.2 / N38

Environment	Effective steel pull	Effect
Air (land)	0.44 kg	Standard
Water (riverbed)	0.50 kg (+0.06 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!

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

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

2. Steel thickness impact

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

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.30

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%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 020171-2025

Measurement Calculator

Pulling force

Force (N)

Force in lbs

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Induction (Gs)

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MP 5x1.5x3 / N38 - ring magnet

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Model MPL 5x5x1.2 / N38 features a low profile and industrial pulling force, making it an ideal solution for building separators and machines. This rectangular block with a force of 4.28 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.

The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 0.44 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

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. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

For mounting flat magnets MPL 5x5x1.2 / N38, it is best to use two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. 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. In practice, this means that this magnet has the greatest attraction force on its main planes (5x5 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 5x5x1.2 mm, which, at a weight of 0.22 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 5x5x1.2 mm and a self-weight of 0.22 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros as well as cons of neodymium magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:

They retain full power for around ten years – the loss is just ~1% (in theory),
Magnets very well resist against loss of magnetization caused by foreign field sources,
Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an professional appearance,
Magnetic induction on the top side of the magnet remains impressive,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
Thanks to flexibility in forming and the ability to customize to individual projects,
Significant place in high-tech industry – they are used in magnetic memories, electric motors, precision medical tools, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in compact constructions

Disadvantages

Cons of neodymium magnets and ways of using them

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power 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
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in realizing threads and complicated forms in magnets, we propose using a housing - magnetic mechanism.
Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
With large orders the cost of neodymium magnets is a challenge,

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

The force parameter is a result of laboratory testing performed under standard conditions:

using a sheet made of mild steel, serving as a circuit closing element
with a thickness no less than 10 mm
characterized by lack of roughness
under conditions of no distance (metal-to-metal)
during detachment in a direction perpendicular to the mounting surface
at standard ambient temperature

Lifting capacity in real conditions – factors

Holding efficiency is influenced by specific conditions, such as (from priority):

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Plate thickness – insufficiently thick plate does not accept the full field, causing part of the power to be wasted into the air.
Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate reduces the holding force.

Safe handling of NdFeB magnets

Pacemakers

For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Do not overheat magnets

Do not overheat. Neodymium magnets are susceptible to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Impact on smartphones

A powerful magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to prevent damaging the sensors.

Combustion hazard

Dust generated during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Cards and drives

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Beware of splinters

Watch out for shards. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Swallowing risk

Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of children and animals.

Crushing force

Large magnets can break fingers instantly. Do not place your hand betwixt two strong magnets.

Conscious usage

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, immediately stop working with magnets and use protective gear.

Warning! Looking for details? Check our post: Why are neodymium magnets dangerous?

MPL 5x5x1.2 / N38 - lamellar magnet

Technical - MPL 5x5x1.2 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the product - data

Table 1: Static pull force (pull vs gap) - power drop MPL 5x5x1.2 / N38

Table 2: Vertical capacity (vertical surface) MPL 5x5x1.2 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MPL 5x5x1.2 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MPL 5x5x1.2 / N38

Table 5: Working in heat (material behavior) - power drop MPL 5x5x1.2 / N38

Table 6: Two magnets (attraction) - forces in the system MPL 5x5x1.2 / N38

Table 7: Protective zones (electronics) - warnings MPL 5x5x1.2 / N38

Table 8: Impact energy (kinetic energy) - warning MPL 5x5x1.2 / N38

Table 9: Anti-corrosion coating durability MPL 5x5x1.2 / N38

Table 10: Construction data (Flux) MPL 5x5x1.2 / N38

Table 11: Submerged application MPL 5x5x1.2 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Heat tolerance

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

Material specification

Sustainability

Pulling force

Magnetic Field

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Pros as well as cons of neodymium magnets.

Benefits

Disadvantages

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

Lifting capacity in real conditions – factors

Safe handling of NdFeB magnets

Pacemakers

Do not overheat magnets

Impact on smartphones

Combustion hazard

Cards and drives

Beware of splinters

Swallowing risk

Crushing force

Conscious usage

Avoid contact if allergic

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MPL 5x5x1.2 / N38

Table 2: Vertical capacity (vertical surface)
MPL 5x5x1.2 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 5x5x1.2 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 5x5x1.2 / N38

Table 5: Working in heat (material behavior) - power drop
MPL 5x5x1.2 / N38

Table 6: Two magnets (attraction) - forces in the system
MPL 5x5x1.2 / N38

Table 7: Protective zones (electronics) - warnings
MPL 5x5x1.2 / N38

Table 8: Impact energy (kinetic energy) - warning
MPL 5x5x1.2 / N38

Table 9: Anti-corrosion coating durability
MPL 5x5x1.2 / N38

Table 10: Construction data (Flux)
MPL 5x5x1.2 / N38

Table 11: Submerged application
MPL 5x5x1.2 / N38