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MPL 30x20x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020141

GTIN/EAN: 5906301811473

5.00

length

30 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

45 g

Magnetization Direction

↑ axial

Load capacity

19.53 kg / 191.55 N

Magnetic Induction

371.57 mT / 3716 Gs

Coating

[NiCuNi] Nickel

16.11 with VAT / pcs + price for transport

13.10 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical of the product - MPL 30x20x10 / N38 - lamellar magnet

Specification / characteristics - MPL 30x20x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020141
GTIN/EAN 5906301811473
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 10 mm [±0,1 mm]
Weight 45 g
Magnetization Direction ↑ axial
Load capacity ~ ? 19.53 kg / 191.55 N
Magnetic Induction ~ ? 371.57 mT / 3716 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x20x10 / 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 simulation of the product - data

Presented data are the result of a mathematical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MPL 30x20x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3715 Gs
371.5 mT
19.53 kg / 43.06 lbs
19530.0 g / 191.6 N
crushing
1 mm 3464 Gs
346.4 mT
16.98 kg / 37.44 lbs
16983.1 g / 166.6 N
crushing
2 mm 3197 Gs
319.7 mT
14.47 kg / 31.89 lbs
14466.6 g / 141.9 N
crushing
3 mm 2927 Gs
292.7 mT
12.12 kg / 26.73 lbs
12123.3 g / 118.9 N
crushing
5 mm 2408 Gs
240.8 mT
8.21 kg / 18.10 lbs
8207.8 g / 80.5 N
strong
10 mm 1411 Gs
141.1 mT
2.82 kg / 6.21 lbs
2815.6 g / 27.6 N
strong
15 mm 832 Gs
83.2 mT
0.98 kg / 2.16 lbs
979.7 g / 9.6 N
weak grip
20 mm 512 Gs
51.2 mT
0.37 kg / 0.82 lbs
371.2 g / 3.6 N
weak grip
30 mm 224 Gs
22.4 mT
0.07 kg / 0.16 lbs
70.7 g / 0.7 N
weak grip
50 mm 65 Gs
6.5 mT
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
weak grip

Table 2: Slippage load (vertical surface)
MPL 30x20x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.91 kg / 8.61 lbs
3906.0 g / 38.3 N
1 mm Stal (~0.2) 3.40 kg / 7.49 lbs
3396.0 g / 33.3 N
2 mm Stal (~0.2) 2.89 kg / 6.38 lbs
2894.0 g / 28.4 N
3 mm Stal (~0.2) 2.42 kg / 5.34 lbs
2424.0 g / 23.8 N
5 mm Stal (~0.2) 1.64 kg / 3.62 lbs
1642.0 g / 16.1 N
10 mm Stal (~0.2) 0.56 kg / 1.24 lbs
564.0 g / 5.5 N
15 mm Stal (~0.2) 0.20 kg / 0.43 lbs
196.0 g / 1.9 N
20 mm Stal (~0.2) 0.07 kg / 0.16 lbs
74.0 g / 0.7 N
30 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x20x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.86 kg / 12.92 lbs
5859.0 g / 57.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.91 kg / 8.61 lbs
3906.0 g / 38.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.95 kg / 4.31 lbs
1953.0 g / 19.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
9.77 kg / 21.53 lbs
9765.0 g / 95.8 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 30x20x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.98 kg / 2.15 lbs
976.5 g / 9.6 N
1 mm
13%
2.44 kg / 5.38 lbs
2441.3 g / 23.9 N
2 mm
25%
4.88 kg / 10.76 lbs
4882.5 g / 47.9 N
3 mm
38%
7.32 kg / 16.15 lbs
7323.8 g / 71.8 N
5 mm
63%
12.21 kg / 26.91 lbs
12206.3 g / 119.7 N
10 mm
100%
19.53 kg / 43.06 lbs
19530.0 g / 191.6 N
11 mm
100%
19.53 kg / 43.06 lbs
19530.0 g / 191.6 N
12 mm
100%
19.53 kg / 43.06 lbs
19530.0 g / 191.6 N

Table 5: Thermal resistance (material behavior) - power drop
MPL 30x20x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 19.53 kg / 43.06 lbs
19530.0 g / 191.6 N
OK
40 °C -2.2% 19.10 kg / 42.11 lbs
19100.3 g / 187.4 N
OK
60 °C -4.4% 18.67 kg / 41.16 lbs
18670.7 g / 183.2 N
80 °C -6.6% 18.24 kg / 40.21 lbs
18241.0 g / 178.9 N
100 °C -28.8% 13.91 kg / 30.66 lbs
13905.4 g / 136.4 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 30x20x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 51.05 kg / 112.54 lbs
5 124 Gs
7.66 kg / 16.88 lbs
7657 g / 75.1 N
N/A
1 mm 47.76 kg / 105.28 lbs
7 186 Gs
7.16 kg / 15.79 lbs
7163 g / 70.3 N
42.98 kg / 94.76 lbs
~0 Gs
2 mm 44.39 kg / 97.86 lbs
6 928 Gs
6.66 kg / 14.68 lbs
6658 g / 65.3 N
39.95 kg / 88.08 lbs
~0 Gs
3 mm 41.06 kg / 90.52 lbs
6 663 Gs
6.16 kg / 13.58 lbs
6159 g / 60.4 N
36.95 kg / 81.47 lbs
~0 Gs
5 mm 34.68 kg / 76.45 lbs
6 124 Gs
5.20 kg / 11.47 lbs
5202 g / 51.0 N
31.21 kg / 68.81 lbs
~0 Gs
10 mm 21.45 kg / 47.30 lbs
4 817 Gs
3.22 kg / 7.09 lbs
3218 g / 31.6 N
19.31 kg / 42.57 lbs
~0 Gs
20 mm 7.36 kg / 16.22 lbs
2 821 Gs
1.10 kg / 2.43 lbs
1104 g / 10.8 N
6.62 kg / 14.60 lbs
~0 Gs
50 mm 0.40 kg / 0.89 lbs
662 Gs
0.06 kg / 0.13 lbs
61 g / 0.6 N
0.36 kg / 0.80 lbs
~0 Gs
60 mm 0.18 kg / 0.41 lbs
447 Gs
0.03 kg / 0.06 lbs
28 g / 0.3 N
0.17 kg / 0.37 lbs
~0 Gs
70 mm 0.09 kg / 0.20 lbs
314 Gs
0.01 kg / 0.03 lbs
14 g / 0.1 N
0.08 kg / 0.18 lbs
~0 Gs
80 mm 0.05 kg / 0.11 lbs
228 Gs
0.01 kg / 0.02 lbs
7 g / 0.1 N
0.04 kg / 0.10 lbs
~0 Gs
90 mm 0.03 kg / 0.06 lbs
170 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
0.02 kg / 0.05 lbs
~0 Gs
100 mm 0.02 kg / 0.03 lbs
130 Gs
0.00 kg / 0.01 lbs
2 g / 0.0 N
0.01 kg / 0.03 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MPL 30x20x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.0 cm
Hearing aid 10 Gs (1.0 mT) 10.0 cm
Timepiece 20 Gs (2.0 mT) 8.0 cm
Mobile device 40 Gs (4.0 mT) 6.5 cm
Car key 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm

Table 8: Impact energy (cracking risk) - warning
MPL 30x20x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.82 km/h
(6.34 m/s)
0.90 J
30 mm 36.47 km/h
(10.13 m/s)
2.31 J
50 mm 46.99 km/h
(13.05 m/s)
3.83 J
100 mm 66.44 km/h
(18.46 m/s)
7.66 J

Table 9: Anti-corrosion coating durability
MPL 30x20x10 / 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 30x20x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 22 801 Mx 228.0 µWb
Pc Coefficient 0.46 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 30x20x10 / N38

Environment Effective steel pull Effect
Air (land) 19.53 kg Standard
Water (riverbed) 22.36 kg
(+2.83 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!
1. Shear force

*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.46

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
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%
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: 020141-2026
Magnet Unit Converter
Force (pull)

Field Strength

Check out more deals

Model MPL 30x20x10 / 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 191.55 N is ready for shipment in 24h, allowing for rapid realization of your project. 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 19.53 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. They work great as fasteners under tiles, wood, or glass. 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 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. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 30 mm (length), 20 mm (width), and 10 mm (thickness). The key parameter here is the holding force amounting to approximately 19.53 kg (force ~191.55 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They retain full power for around ten years – the loss is just ~1% (according to analyses),
  • They have excellent resistance to magnetism drop when exposed to external fields,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnetic induction on the surface of the magnet remains impressive,
  • 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...
  • Due to the possibility of accurate forming and adaptation to unique solutions, magnetic components can be created in a wide range of geometric configurations, which expands the range of possible applications,
  • Significant place in future technologies – they are used in hard drives, drive modules, diagnostic systems, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Limited ability of creating threads in the magnet and complicated shapes - recommended is cover - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat affects it?

Breakaway force was defined for ideal contact conditions, assuming:
  • with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • whose transverse dimension equals approx. 10 mm
  • characterized by even structure
  • without any clearance between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • at temperature room level

Determinants of practical lifting force of a magnet

It is worth knowing that the magnet holding will differ depending on elements below, starting with the most relevant:
  • Clearance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – ground elements guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Magnetic interference

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Nickel allergy

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and opt for coated magnets.

Cards and drives

Data protection: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Keep away from children

Product intended for adults. Tiny parts pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Heat sensitivity

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Physical harm

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!

Shattering risk

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets leads to them breaking into shards.

Do not drill into magnets

Powder produced during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Danger to pacemakers

For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Conscious usage

Handle magnets consciously. Their powerful strength can shock even experienced users. Stay alert and do not underestimate their power.

Attention! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98