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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

3.89 with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

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Technical parameters 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

Technical analysis of the assembly - data

The following information constitute the result of a engineering simulation. Values rely on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
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 pounds
2110.0 g / 20.7 N
medium risk
1 mm 1098 Gs
109.8 mT
1.92 kg / 4.23 pounds
1920.5 g / 18.8 N
safe
2 mm 1019 Gs
101.9 mT
1.65 kg / 3.65 pounds
1654.9 g / 16.2 N
safe
3 mm 926 Gs
92.6 mT
1.37 kg / 3.01 pounds
1365.9 g / 13.4 N
safe
5 mm 733 Gs
73.3 mT
0.86 kg / 1.89 pounds
855.2 g / 8.4 N
safe
10 mm 379 Gs
37.9 mT
0.23 kg / 0.50 pounds
228.8 g / 2.2 N
safe
15 mm 203 Gs
20.3 mT
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
safe
20 mm 116 Gs
11.6 mT
0.02 kg / 0.05 pounds
21.6 g / 0.2 N
safe
30 mm 46 Gs
4.6 mT
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
safe
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
safe

Table 2: Vertical capacity (wall)
MPL 30x15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.42 kg / 0.93 pounds
422.0 g / 4.1 N
1 mm Stal (~0.2) 0.38 kg / 0.85 pounds
384.0 g / 3.8 N
2 mm Stal (~0.2) 0.33 kg / 0.73 pounds
330.0 g / 3.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 pounds
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.17 kg / 0.38 pounds
172.0 g / 1.7 N
10 mm Stal (~0.2) 0.05 kg / 0.10 pounds
46.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (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 pounds
633.0 g / 6.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.42 kg / 0.93 pounds
422.0 g / 4.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.21 kg / 0.47 pounds
211.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N

Table 4: Steel thickness (saturation) - sheet metal selection
MPL 30x15x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.21 kg / 0.47 pounds
211.0 g / 2.1 N
1 mm
25%
0.53 kg / 1.16 pounds
527.5 g / 5.2 N
2 mm
50%
1.06 kg / 2.33 pounds
1055.0 g / 10.3 N
3 mm
75%
1.58 kg / 3.49 pounds
1582.5 g / 15.5 N
5 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
10 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
11 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N
12 mm
100%
2.11 kg / 4.65 pounds
2110.0 g / 20.7 N

Table 5: Thermal stability (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 pounds
2110.0 g / 20.7 N
OK
40 °C -2.2% 2.06 kg / 4.55 pounds
2063.6 g / 20.2 N
OK
60 °C -4.4% 2.02 kg / 4.45 pounds
2017.2 g / 19.8 N
80 °C -6.6% 1.97 kg / 4.34 pounds
1970.7 g / 19.3 N
100 °C -28.8% 1.50 kg / 3.31 pounds
1502.3 g / 14.7 N

Table 6: Two magnets (repulsion) - forces in the system
MPL 30x15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 3.67 kg / 8.10 pounds
2 169 Gs
0.55 kg / 1.22 pounds
551 g / 5.4 N
N/A
1 mm 3.53 kg / 7.79 pounds
2 257 Gs
0.53 kg / 1.17 pounds
530 g / 5.2 N
3.18 kg / 7.01 pounds
~0 Gs
2 mm 3.34 kg / 7.37 pounds
2 196 Gs
0.50 kg / 1.11 pounds
502 g / 4.9 N
3.01 kg / 6.64 pounds
~0 Gs
3 mm 3.12 kg / 6.89 pounds
2 122 Gs
0.47 kg / 1.03 pounds
469 g / 4.6 N
2.81 kg / 6.20 pounds
~0 Gs
5 mm 2.63 kg / 5.80 pounds
1 948 Gs
0.39 kg / 0.87 pounds
395 g / 3.9 N
2.37 kg / 5.22 pounds
~0 Gs
10 mm 1.49 kg / 3.28 pounds
1 465 Gs
0.22 kg / 0.49 pounds
223 g / 2.2 N
1.34 kg / 2.96 pounds
~0 Gs
20 mm 0.40 kg / 0.88 pounds
758 Gs
0.06 kg / 0.13 pounds
60 g / 0.6 N
0.36 kg / 0.79 pounds
~0 Gs
50 mm 0.01 kg / 0.03 pounds
142 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs
60 mm 0.01 kg / 0.01 pounds
92 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
63 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
44 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
32 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
24 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

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
Timepiece 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Car key 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

Table 8: Impact energy (kinetic energy) - collision effects
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

Table 9: Corrosion resistance
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)

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

Parameter Value SI Unit / Description
Magnetic Flux 6 236 Mx 62.4 µWb
Pc Coefficient 0.13 Low (Flat)

Table 11: Physics of underwater searching
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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical surface, the magnet retains only ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Temperature resistance

*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
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%
Environmental data
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
Measurement Calculator
Magnet pull force

Field Strength

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 30x15x2 mm and a weight of 6.75 g, guarantees the highest quality connection. As a block magnet with high power (approx. 2.11 kg), this product is available immediately from our warehouse in Poland. 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.
Plate magnets MPL 30x15x2 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 2.11 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 30x15x2 / N38, we recommend utilizing strong epoxy glues (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 clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 30x15x2 / N38 model is magnetized through the thickness (dimension 2 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 (30x15 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 30 mm (length), 15 mm (width), and 2 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 2.11 kg (force ~20.69 N), which, with such a compact shape, proves the high power of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain magnetic properties for around ten years – the loss is just ~1% (according to analyses),
  • They retain their magnetic properties even under external field action,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
  • Considering the ability of flexible shaping and adaptation to unique needs, neodymium magnets can be produced in a variety of shapes and sizes, which increases their versatility,
  • Universal use in innovative solutions – they are utilized in computer drives, electric drive systems, advanced medical instruments, as well as other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose 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 durability even at temperatures up to 230°C
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to complicate diagnosis medical after entering 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

Holding force characteristics

Maximum lifting capacity of the magnetwhat it depends on?

The declared magnet strength represents the peak performance, recorded under laboratory conditions, specifically:
  • on a plate made of mild steel, effectively closing the magnetic field
  • with a thickness minimum 10 mm
  • with an ground contact surface
  • without the slightest air gap between the magnet and steel
  • during pulling in a direction perpendicular to the mounting surface
  • at temperature room level

Determinants of lifting force in real conditions

In real-world applications, the actual holding force is determined by a number of factors, ranked from crucial:
  • Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel type – low-carbon steel gives the best results. Higher carbon content decrease magnetic properties and holding force.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Flammability

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Precision electronics

Be aware: neodymium magnets generate a field that interferes with sensitive sensors. Keep a separation from your phone, device, and navigation systems.

Allergic reactions

Certain individuals suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling might lead to a rash. We strongly advise wear safety gloves.

Adults only

Always store magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are life-threatening.

Power loss in heat

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Magnets are brittle

Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Handling guide

Be careful. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can move away.

Keep away from computers

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Hand protection

Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and broken bones. Protective gloves are recommended.

Health Danger

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Important! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98