MPL 35x7x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020145
GTIN/EAN: 5906301811510
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 ZŁ with VAT / pcs + price for transport
2.43 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
alternatively send us a note via
request form
the contact page.
Parameters as well as shape of a magnet can be tested using our
our magnetic calculator.
Orders submitted before 14:00 will be dispatched today!
Detailed specification - MPL 35x7x3 / N38 - lamellar magnet
Specification / characteristics - MPL 35x7x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020145 |
| GTIN/EAN | 5906301811510 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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
These data represent the direct effect of a mathematical simulation. Values are based on algorithms for the material Nd2Fe14B. Actual parameters may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs distance) - interaction chart
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
|
safe |
| 5 mm |
832 Gs
83.2 mT
|
0.53 kg / 1.16 lbs
526.9 g / 5.2 N
|
safe |
| 10 mm |
318 Gs
31.8 mT
|
0.08 kg / 0.17 lbs
77.1 g / 0.8 N
|
safe |
| 15 mm |
158 Gs
15.8 mT
|
0.02 kg / 0.04 lbs
18.9 g / 0.2 N
|
safe |
| 20 mm |
89 Gs
8.9 mT
|
0.01 kg / 0.01 lbs
6.0 g / 0.1 N
|
safe |
| 30 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
|
safe |
| 50 mm |
10 Gs
1.0 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
Table 2: Shear force (vertical surface)
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: Wall mounting (shearing) - 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 (substrate influence) - sheet metal selection
MPL 35x7x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.62 kg / 1.37 lbs
621.0 g / 6.1 N
|
| 1 mm |
|
1.55 kg / 3.42 lbs
1552.5 g / 15.2 N
|
| 2 mm |
|
3.11 kg / 6.85 lbs
3105.0 g / 30.5 N
|
| 3 mm |
|
4.66 kg / 10.27 lbs
4657.5 g / 45.7 N
|
| 5 mm |
|
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
|
| 10 mm |
|
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
|
| 11 mm |
|
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
|
| 12 mm |
|
6.21 kg / 13.69 lbs
6210.0 g / 60.9 N
|
Table 5: Thermal stability (stability) - 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 (attraction) - forces in the system
MPL 35x7x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (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: Protective zones (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 |
| Phone / Smartphone | 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: Dynamics (kinetic energy) - collision effects
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: Coating parameters (durability)
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: Construction data (Flux)
MPL 35x7x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 851 Mx | 58.5 µWb |
| Pc Coefficient | 0.25 | Low (Flat) |
Table 11: Submerged application
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% |
1. Vertical hold
*Note: On a vertical surface, the magnet retains just a fraction of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Power loss vs temp
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.25
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out also proposals
Strengths and weaknesses of Nd2Fe14B magnets.
Pros
- Their power is durable, and after approximately 10 years it decreases only by ~1% (according to research),
- They show high resistance to demagnetization induced by external field influence,
- Thanks to the shimmering finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
- The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- In view of the potential of flexible molding and customization to specialized projects, NdFeB magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
- Significant place in future technologies – they find application in magnetic memories, electromotive mechanisms, medical equipment, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in small systems
Disadvantages
- Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited possibility of producing threads in the magnet and complex forms - preferred is cover - mounting mechanism.
- Health risk resulting from small fragments of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices are able to disrupt the diagnostic process medical after entering the body.
- With large orders the cost of neodymium magnets is economically unviable,
Lifting parameters
Magnetic strength at its maximum – what affects it?
- using a sheet made of mild steel, acting as a ideal flux conductor
- whose thickness equals approx. 10 mm
- with a plane perfectly flat
- under conditions of gap-free contact (metal-to-metal)
- under axial force direction (90-degree angle)
- at temperature room level
What influences lifting capacity in practice
- Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate decreases the load capacity.
Precautions when working with neodymium magnets
Pacemakers
Individuals with a pacemaker must keep an safe separation from magnets. The magnetism can interfere with the operation of the implant.
Beware of splinters
Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Threat to electronics
Do not bring magnets near a purse, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.
Powerful field
Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Hand protection
Pinching hazard: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.
Warning for allergy sufferers
Some people experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching can result in skin redness. We recommend use protective gloves.
Machining danger
Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.
No play value
Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep out of reach of children and animals.
Compass and GPS
A powerful magnetic field interferes with the operation of compasses in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.
Heat sensitivity
Control the heat. Exposing the magnet to high heat will ruin its properties and strength.
