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MPL 15x2x30 / N38 - lamellar magnet

lamellar magnet

Catalog no 020121

GTIN/EAN: 5906301811275

5.00

length

15 mm [±0,1 mm]

Width

2 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

6.75 g

Magnetization Direction

→ diametrical

Load capacity

0.68 kg / 6.68 N

Magnetic Induction

614.34 mT / 6143 Gs

Coating

[NiCuNi] Nickel

4.75 with VAT / pcs + price for transport

3.86 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 15x2x30 / N38 - lamellar magnet

Specification / characteristics - MPL 15x2x30 / N38 - lamellar magnet

properties
properties values
Cat. no. 020121
GTIN/EAN 5906301811275
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 15 mm [±0,1 mm]
Width 2 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 6.75 g
Magnetization Direction → diametrical
Load capacity ~ ? 0.68 kg / 6.68 N
Magnetic Induction ~ ? 614.34 mT / 6143 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 15x2x30 / 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

Technical analysis of the product - technical parameters

The following information constitute the outcome of a mathematical analysis. Values are based on models for the class Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MPL 15x2x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6128 Gs
612.8 mT
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
weak grip
1 mm 3036 Gs
303.6 mT
0.17 kg / 0.37 LBS
166.8 g / 1.6 N
weak grip
2 mm 1736 Gs
173.6 mT
0.05 kg / 0.12 LBS
54.5 g / 0.5 N
weak grip
3 mm 1150 Gs
115.0 mT
0.02 kg / 0.05 LBS
23.9 g / 0.2 N
weak grip
5 mm 623 Gs
62.3 mT
0.01 kg / 0.02 LBS
7.0 g / 0.1 N
weak grip
10 mm 218 Gs
21.8 mT
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
weak grip
15 mm 103 Gs
10.3 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
weak grip
20 mm 58 Gs
5.8 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
weak grip
30 mm 24 Gs
2.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Sliding hold (vertical surface)
MPL 15x2x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.14 kg / 0.30 LBS
136.0 g / 1.3 N
1 mm Stal (~0.2) 0.03 kg / 0.07 LBS
34.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.02 LBS
10.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 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

Table 3: Vertical assembly (shearing) - vertical pull
MPL 15x2x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.20 kg / 0.45 LBS
204.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.14 kg / 0.30 LBS
136.0 g / 1.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 LBS
68.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.34 kg / 0.75 LBS
340.0 g / 3.3 N

Table 4: Steel thickness (substrate influence) - power losses
MPL 15x2x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.15 LBS
68.0 g / 0.7 N
1 mm
25%
0.17 kg / 0.37 LBS
170.0 g / 1.7 N
2 mm
50%
0.34 kg / 0.75 LBS
340.0 g / 3.3 N
3 mm
75%
0.51 kg / 1.12 LBS
510.0 g / 5.0 N
5 mm
100%
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
10 mm
100%
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
11 mm
100%
0.68 kg / 1.50 LBS
680.0 g / 6.7 N
12 mm
100%
0.68 kg / 1.50 LBS
680.0 g / 6.7 N

Table 5: Thermal resistance (stability) - resistance threshold
MPL 15x2x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.68 kg / 1.50 LBS
680.0 g / 6.7 N
OK
40 °C -2.2% 0.67 kg / 1.47 LBS
665.0 g / 6.5 N
OK
60 °C -4.4% 0.65 kg / 1.43 LBS
650.1 g / 6.4 N
OK
80 °C -6.6% 0.64 kg / 1.40 LBS
635.1 g / 6.2 N
100 °C -28.8% 0.48 kg / 1.07 LBS
484.2 g / 4.7 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 15x2x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 6.95 kg / 15.31 LBS
6 152 Gs
1.04 kg / 2.30 LBS
1042 g / 10.2 N
N/A
1 mm 3.45 kg / 7.62 LBS
8 643 Gs
0.52 kg / 1.14 LBS
518 g / 5.1 N
3.11 kg / 6.85 LBS
~0 Gs
2 mm 1.70 kg / 3.76 LBS
6 071 Gs
0.26 kg / 0.56 LBS
256 g / 2.5 N
1.53 kg / 3.38 LBS
~0 Gs
3 mm 0.93 kg / 2.05 LBS
4 482 Gs
0.14 kg / 0.31 LBS
139 g / 1.4 N
0.84 kg / 1.84 LBS
~0 Gs
5 mm 0.36 kg / 0.79 LBS
2 788 Gs
0.05 kg / 0.12 LBS
54 g / 0.5 N
0.32 kg / 0.71 LBS
~0 Gs
10 mm 0.07 kg / 0.16 LBS
1 247 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
0.06 kg / 0.14 LBS
~0 Gs
20 mm 0.01 kg / 0.02 LBS
435 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
71 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
47 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
33 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
24 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
18 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
14 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MPL 15x2x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (cracking risk) - warning
MPL 15x2x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.13 km/h
(2.81 m/s)
0.03 J
30 mm 17.53 km/h
(4.87 m/s)
0.08 J
50 mm 22.63 km/h
(6.29 m/s)
0.13 J
100 mm 32.01 km/h
(8.89 m/s)
0.27 J

Table 9: Surface protection spec
MPL 15x2x30 / 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)

Table 10: Construction data (Flux)
MPL 15x2x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 210 Mx 22.1 µWb
Pc Coefficient 1.54 High (Stable)

Table 11: Submerged application
MPL 15x2x30 / N38

Environment Effective steel pull Effect
Air (land) 0.68 kg Standard
Water (riverbed) 0.78 kg
(+0.10 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Shear force

*Note: On a vertical wall, the magnet holds merely a fraction of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.54

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 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: 020121-2026
Measurement Calculator
Pulling force

Magnetic Field

Other offers

This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 15x2x30 mm and a weight of 6.75 g, guarantees the highest quality connection. As a block magnet with high power (approx. 0.68 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.
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. To separate the MPL 15x2x30 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 15x2x30 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 0.68 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 15x2x30 / N38, we recommend utilizing 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. Remember to roughen and wash 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 (15x2 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 15x2x30 mm, which, at a weight of 6.75 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 0.68 kg (force ~6.68 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of Nd2Fe14B magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
  • A magnet with a shiny nickel surface looks better,
  • Magnets have impressive magnetic induction on the outer layer,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of individual forming as well as adjusting to precise applications,
  • Versatile presence in advanced technology sectors – they find application in mass storage devices, electric motors, diagnostic systems, and industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We suggest a housing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum holding power of the magnet – what affects it?

The lifting capacity listed is a result of laboratory testing executed under specific, ideal conditions:
  • on a base made of mild steel, optimally conducting the magnetic field
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a plane free of scratches
  • with zero gap (without coatings)
  • under perpendicular force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

Holding efficiency is affected by specific conditions, such as (from most important):
  • Gap (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Base smoothness – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Swallowing risk

Always store magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are fatal.

Electronic hazard

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Shattering risk

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Impact on smartphones

A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Operating temperature

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Allergic reactions

Studies show that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, avoid touching magnets with bare hands and select versions in plastic housing.

Danger to pacemakers

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

Do not underestimate power

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

Fire warning

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Serious injuries

Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!

Attention! Learn more about hazards in the article: Magnet Safety Guide.