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MPL 30x15x2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020140

GTIN/EAN: 5906301811466

5.00

length

30 mm [±0,1 mm]

Width

15 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

6.75 g

Magnetization Direction

↑ axial

Load capacity

2.11 kg / 20.69 N

Magnetic Induction

115.11 mT / 1151 Gs

Coating

[NiCuNi] Nickel

technical details »

3.89 ZŁ with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

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Technical of the product - MPL 30x15x2 / N38 - lamellar magnet

Specification / characteristics - MPL 30x15x2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020140
GTIN/EAN 5906301811466
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 15 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 6.75 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.11 kg / 20.69 N
Magnetic Induction ~ ? 115.11 mT / 1151 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x15x2 / 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

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 simulation of the product - technical parameters

The following information represent the outcome of a mathematical simulation. Values are based on models for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Treat these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
MPL 30x15x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1151 Gs
115.1 mT
 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
 medium risk
1 mm 1098 Gs
109.8 mT
 1.92 kg / 4.23 LBS
1920.5 g / 18.8 N
 weak grip
2 mm 1019 Gs
101.9 mT
 1.65 kg / 3.65 LBS
1654.9 g / 16.2 N
 weak grip
3 mm 926 Gs
92.6 mT
 1.37 kg / 3.01 LBS
1365.9 g / 13.4 N
 weak grip
5 mm 733 Gs
73.3 mT
 0.86 kg / 1.89 LBS
855.2 g / 8.4 N
 weak grip
10 mm 379 Gs
37.9 mT
 0.23 kg / 0.50 LBS
228.8 g / 2.2 N
 weak grip
15 mm 203 Gs
20.3 mT
 0.07 kg / 0.14 LBS
65.6 g / 0.6 N
 weak grip
20 mm 116 Gs
11.6 mT
 0.02 kg / 0.05 LBS
21.6 g / 0.2 N
 weak grip
30 mm 46 Gs
4.6 mT
 0.00 kg / 0.01 LBS
3.4 g / 0.0 N
 weak grip
50 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 LBS
0.2 g / 0.0 N
 weak grip
Pulling power decreases sharply per each millimeter of spacing. Keep in mind that even a microscopic distance (e.g., contamination, varnish, rust) significantly reduces the pull force. Magnetic products operate most effectively at the point of direct contact; gap drastically cuts the force. Observe how rapidly the load capacity drop, when the product does not adhere flatly to the steel surface. When planning the mounting, eliminate redundant distances.

Table 2: Shear load (wall)
MPL 30x15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.42 kg / 0.93 LBS
422.0 g / 4.1 N
1 mm Stal (~0.2) 0.38 kg / 0.85 LBS
384.0 g / 3.8 N
2 mm Stal (~0.2) 0.33 kg / 0.73 LBS
330.0 g / 3.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 LBS
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.17 kg / 0.38 LBS
172.0 g / 1.7 N
10 mm Stal (~0.2) 0.05 kg / 0.10 LBS
46.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The following data shows the theoretical shear load sufficient to cause the downward movement of the magnet vertically along a vertical steel wall (considering typical friction coefficient). The holding force is relative to the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MPL 30x15x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.63 kg / 1.40 LBS
633.0 g / 6.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.42 kg / 0.93 LBS
422.0 g / 4.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.21 kg / 0.47 LBS
211.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.06 kg / 2.33 LBS
1055.0 g / 10.3 N
When placing a holder on a upright plane (e.g., a fridge), it will only hold only approx. 20%-30% of its maximum pull force. Gravity and a weak degree of grip influence the fact that holders move down faster than they detach. Designing a hanger? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the element will give way down under a significantly smaller load. Using a rubber layer can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MPL 30x15x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.21 kg / 0.47 LBS
211.0 g / 2.1 N
1 mm
25%
 0.53 kg / 1.16 LBS
527.5 g / 5.2 N
2 mm
50%
 1.06 kg / 2.33 LBS
1055.0 g / 10.3 N
3 mm
75%
 1.58 kg / 3.49 LBS
1582.5 g / 15.5 N
5 mm
100%
 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
10 mm
100%
 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
11 mm
100%
 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
12 mm
100%
 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
A thin metal plate is not enough to focus the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a thin surface, the field will penetrate right through and the holding will be smaller. To utilize the maximum of this neodymium's potential, you need a suitably thick backing of metal. The saturation phenomenon causes that on delicate walls (e.g., thin profiles), the product shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 30x15x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.11 kg / 4.65 LBS
2110.0 g / 20.7 N
 OK
40 °C -2.2% 2.06 kg / 4.55 LBS
2063.6 g / 20.2 N
 OK
60 °C -4.4% 2.02 kg / 4.45 LBS
2017.2 g / 19.8 N
80 °C -6.6% 1.97 kg / 4.34 LBS
1970.7 g / 19.3 N
100 °C -28.8% 1.50 kg / 3.31 LBS
1502.3 g / 14.7 N
Standard neodymium magnets irreversibly lose strength after exceeding the maximum temperature. Watch out for overheating – heat can permanently damage this product. With increasing heat, the neodymium's capacity momentarily drops. Avoid using this product near heat sources higher than its safe range. Exceeding the critical threshold will result in destruction of magnetic properties.
*Engineering note: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (low Pc) are more susceptible to demagnetization sooner than taller cylinders. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MPL 30x15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.67 kg / 8.10 LBS
2 169 Gs
0.55 kg / 1.22 LBS
551 g / 5.4 N
 N/A
1 mm 3.53 kg / 7.79 LBS
2 257 Gs
0.53 kg / 1.17 LBS
530 g / 5.2 N
 3.18 kg / 7.01 LBS
~0 Gs
2 mm 3.34 kg / 7.37 LBS
2 196 Gs
0.50 kg / 1.11 LBS
502 g / 4.9 N
 3.01 kg / 6.64 LBS
~0 Gs
3 mm 3.12 kg / 6.89 LBS
2 122 Gs
0.47 kg / 1.03 LBS
469 g / 4.6 N
 2.81 kg / 6.20 LBS
~0 Gs
5 mm 2.63 kg / 5.80 LBS
1 948 Gs
0.39 kg / 0.87 LBS
395 g / 3.9 N
 2.37 kg / 5.22 LBS
~0 Gs
10 mm 1.49 kg / 3.28 LBS
1 465 Gs
0.22 kg / 0.49 LBS
223 g / 2.2 N
 1.34 kg / 2.96 LBS
~0 Gs
20 mm 0.40 kg / 0.88 LBS
758 Gs
0.06 kg / 0.13 LBS
60 g / 0.6 N
 0.36 kg / 0.79 LBS
~0 Gs
50 mm 0.01 kg / 0.03 LBS
142 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.03 LBS
~0 Gs
60 mm 0.01 kg / 0.01 LBS
92 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.01 LBS
63 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
44 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
32 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
24 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnetic products attract each other from a much further distance than a magnet and sheet combination. Such a system of two magnets produces a massive flux and a further horizon of performance. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the pinch force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*The magnetic induction between like poles is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Estimates apply to shear force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 30x15x2 / 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
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Powerful magnet radiation is a large risk to electronic devices as well as pacemakers. These magnets produce a field that disrupts operation of sensitive medical devices. Remember: the invisible magnetic field passes through tissues and housings. Exceptional care must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - warning
MPL 30x15x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.00 km/h
(5.28 m/s)
 0.09 J
30 mm 30.91 km/h
(8.59 m/s)
 0.25 J
50 mm 39.87 km/h
(11.08 m/s)
 0.41 J
100 mm 56.39 km/h
(15.66 m/s)
 0.83 J
Neodymium magnets are very brittle – a strong collision with metal causes immediate chipping. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or injury to fingers. Be sure to control the product during mounting so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Coating parameters (durability)
MPL 30x15x2 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Electrical data (Pc)
MPL 30x15x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 236 Mx 62.4 µWb
Pc Coefficient 0.13 Low (Flat)
Flux value passing through the magnet pole. Essential parameter in coil applications as well as sensors. Pc value determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 30x15x2 / N38

Environment Effective steel pull Effect
Air (land) 2.11 kg Standard
Water (riverbed) 2.42 kg
(+0.31 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains merely approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 Pc (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 Pc 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 and environmental data
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: 020140-2026
Quick Unit Converter
Force (pull)
Magnetic Induction
Input a number in any box, to see all other values convert automatically.

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Component MPL 30x15x2 / N38 features a flat shape and industrial pulling force, making it an ideal solution for building separators and machines. This magnetic block with a force of 20.69 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 2.11 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 generators and material handling systems. Thanks to the flat surface and high force (approx. 2.11 kg), they are ideal as closers in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. 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 (30x15 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 30x15x2 mm, which, at a weight of 6.75 g, makes it an element with high energy density. It is a magnetic block with dimensions 30x15x2 mm and a self-weight of 6.75 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of neodymium magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They do not lose strength, even over nearly ten years – the drop in lifting capacity is only ~1% (based on measurements),
  • They feature excellent resistance to weakening of magnetic properties as a result of external magnetic sources,
  • Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an modern appearance,
  • Magnets exhibit exceptionally strong magnetic induction on the surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in forming and the ability to customize to client solutions,
  • Huge importance in advanced technology sectors – they are commonly used in computer drives, drive modules, precision medical tools, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we advise 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.
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using a housing - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Holding force of 2.11 kg is a measurement result performed under the following configuration:
  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by even structure
  • without any insulating layer between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • at room temperature

Lifting capacity in real conditions – factors

In real-world applications, the real power is determined by several key aspects, listed from the most important:
  • Clearance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was tested 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 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Warnings
Powerful field

Handle magnets consciously. Their powerful strength can surprise even professionals. Stay alert and respect their force.

Electronic devices

Data protection: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Physical harm

Risk of injury: The pulling power is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Magnet fragility

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them cracking into shards.

Allergic reactions

Certain individuals have a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Prolonged contact can result in an allergic reaction. It is best to use protective gloves.

Demagnetization risk

Keep cool. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Phone sensors

An intense magnetic field disrupts the operation of compasses in smartphones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Danger to the youngest

Strictly keep magnets away from children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.

Medical interference

For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Attention! Want to know more? Check our post: Why are neodymium magnets dangerous?