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MPL 35x7x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020145

GTIN/EAN: 5906301811510

5.00

length

35 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

5.51 g

Magnetization Direction

↑ axial

Load capacity

6.21 kg / 60.89 N

Magnetic Induction

285.96 mT / 2860 Gs

Coating

[NiCuNi] Nickel

2.99 with VAT / pcs + price for transport

2.43 ZŁ net + 23% VAT / pcs

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Technical - MPL 35x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 35x7x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020145
GTIN/EAN 5906301811510
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 35 mm [±0,1 mm]
Width 7 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 5.51 g
Magnetization Direction ↑ axial
Load capacity ~ ? 6.21 kg / 60.89 N
Magnetic Induction ~ ? 285.96 mT / 2860 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 35x7x3 / 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 magnet - data

These information represent the outcome of a engineering calculation. Values are based on models for the material Nd2Fe14B. Real-world parameters may deviate from the simulation results. Treat these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - power drop
MPL 35x7x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2858 Gs
285.8 mT
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
medium risk
1 mm 2328 Gs
232.8 mT
4.12 kg / 9.09 lbs
4121.1 g / 40.4 N
medium risk
2 mm 1801 Gs
180.1 mT
2.47 kg / 5.44 lbs
2467.6 g / 24.2 N
medium risk
3 mm 1376 Gs
137.6 mT
1.44 kg / 3.18 lbs
1440.7 g / 14.1 N
weak grip
5 mm 832 Gs
83.2 mT
0.53 kg / 1.16 lbs
526.9 g / 5.2 N
weak grip
10 mm 318 Gs
31.8 mT
0.08 kg / 0.17 lbs
77.1 g / 0.8 N
weak grip
15 mm 158 Gs
15.8 mT
0.02 kg / 0.04 lbs
18.9 g / 0.2 N
weak grip
20 mm 89 Gs
8.9 mT
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
weak grip
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
weak grip
50 mm 10 Gs
1.0 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip

Table 2: Shear hold (wall)
MPL 35x7x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.24 kg / 2.74 lbs
1242.0 g / 12.2 N
1 mm Stal (~0.2) 0.82 kg / 1.82 lbs
824.0 g / 8.1 N
2 mm Stal (~0.2) 0.49 kg / 1.09 lbs
494.0 g / 4.8 N
3 mm Stal (~0.2) 0.29 kg / 0.63 lbs
288.0 g / 2.8 N
5 mm Stal (~0.2) 0.11 kg / 0.23 lbs
106.0 g / 1.0 N
10 mm Stal (~0.2) 0.02 kg / 0.04 lbs
16.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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 (sliding) - behavior on slippery surfaces
MPL 35x7x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.86 kg / 4.11 lbs
1863.0 g / 18.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.24 kg / 2.74 lbs
1242.0 g / 12.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.62 kg / 1.37 lbs
621.0 g / 6.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.11 kg / 6.85 lbs
3105.0 g / 30.5 N

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 35x7x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.62 kg / 1.37 lbs
621.0 g / 6.1 N
1 mm
25%
1.55 kg / 3.42 lbs
1552.5 g / 15.2 N
2 mm
50%
3.11 kg / 6.85 lbs
3105.0 g / 30.5 N
3 mm
75%
4.66 kg / 10.27 lbs
4657.5 g / 45.7 N
5 mm
100%
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
10 mm
100%
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
11 mm
100%
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
12 mm
100%
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N

Table 5: Working in heat (material behavior) - resistance threshold
MPL 35x7x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
OK
40 °C -2.2% 6.07 kg / 13.39 lbs
6073.4 g / 59.6 N
OK
60 °C -4.4% 5.94 kg / 13.09 lbs
5936.8 g / 58.2 N
80 °C -6.6% 5.80 kg / 12.79 lbs
5800.1 g / 56.9 N
100 °C -28.8% 4.42 kg / 9.75 lbs
4421.5 g / 43.4 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 35x7x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 12.34 kg / 27.19 lbs
4 231 Gs
1.85 kg / 4.08 lbs
1850 g / 18.2 N
N/A
1 mm 10.25 kg / 22.59 lbs
5 209 Gs
1.54 kg / 3.39 lbs
1537 g / 15.1 N
9.22 kg / 20.33 lbs
~0 Gs
2 mm 8.19 kg / 18.05 lbs
4 656 Gs
1.23 kg / 2.71 lbs
1228 g / 12.0 N
7.37 kg / 16.24 lbs
~0 Gs
3 mm 6.38 kg / 14.07 lbs
4 110 Gs
0.96 kg / 2.11 lbs
957 g / 9.4 N
5.74 kg / 12.66 lbs
~0 Gs
5 mm 3.74 kg / 8.25 lbs
3 149 Gs
0.56 kg / 1.24 lbs
562 g / 5.5 N
3.37 kg / 7.43 lbs
~0 Gs
10 mm 1.05 kg / 2.31 lbs
1 665 Gs
0.16 kg / 0.35 lbs
157 g / 1.5 N
0.94 kg / 2.08 lbs
~0 Gs
20 mm 0.15 kg / 0.34 lbs
637 Gs
0.02 kg / 0.05 lbs
23 g / 0.2 N
0.14 kg / 0.30 lbs
~0 Gs
50 mm 0.00 kg / 0.01 lbs
109 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 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
70 mm 0.00 kg / 0.00 lbs
48 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
34 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
25 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
19 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 35x7x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 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

Table 8: Collisions (cracking risk) - warning
MPL 35x7x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.12 km/h
(9.48 m/s)
0.25 J
30 mm 58.65 km/h
(16.29 m/s)
0.73 J
50 mm 75.71 km/h
(21.03 m/s)
1.22 J
100 mm 107.07 km/h
(29.74 m/s)
2.44 J

Table 9: Corrosion resistance
MPL 35x7x3 / 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 (Pc)
MPL 35x7x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 851 Mx 58.5 µWb
Pc Coefficient 0.25 Low (Flat)

Table 11: Hydrostatics and buoyancy
MPL 35x7x3 / N38

Environment Effective steel pull Effect
Air (land) 6.21 kg Standard
Water (riverbed) 7.11 kg
(+0.90 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

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

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.25

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.

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%
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: 020145-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other offers

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 35x7x3 mm and a weight of 5.51 g, guarantees premium class connection. This rectangular block with a force of 60.89 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 strong flat 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 6.21 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 wind generators and material handling systems. Thanks to the flat surface and high force (approx. 6.21 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 35x7x3 / 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 (35x7 mm), which is ideal for flat mounting. 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: 35 mm (length), 7 mm (width), and 3 mm (thickness). It is a magnetic block with dimensions 35x7x3 mm and a self-weight of 5.51 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of rare earth magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They retain attractive force for almost 10 years – the loss is just ~1% (according to analyses),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • Thanks to the reflective finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Due to the potential of precise shaping and customization to individualized needs, neodymium magnets can be modeled in a wide range of shapes and sizes, which amplifies use scope,
  • Fundamental importance in electronics industry – they are used in computer drives, electric motors, medical equipment, and industrial machines.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their strength 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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these magnets can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Detachment force of the magnet in optimal conditionswhat it depends on?

The load parameter shown refers to the maximum value, recorded under optimal environment, namely:
  • on a block made of mild steel, effectively closing the magnetic field
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with a surface perfectly flat
  • under conditions of gap-free contact (metal-to-metal)
  • under perpendicular force direction (90-degree angle)
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

In practice, the actual holding force is determined by several key aspects, ranked from most significant:
  • Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface finish – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Warning for allergy sufferers

Studies show that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, prevent direct skin contact and opt for encased magnets.

Threat to navigation

Note: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your phone, device, and navigation systems.

Electronic hazard

Do not bring magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Fragile material

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them cracking into small pieces.

Finger safety

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Fire warning

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Medical interference

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Safe operation

Handle magnets consciously. Their huge power can shock even experienced users. Plan your moves and do not underestimate their power.

Heat warning

Watch the temperature. Heating the magnet to high heat will permanently weaken its magnetic structure and strength.

Swallowing risk

Absolutely store magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are tragic.

Attention! 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