MPL 40x15x6 / N38 - lamellar magnet
lamellar magnet
Catalog no 020155
GTIN/EAN: 5906301811619
length
40 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
27 g
Magnetization Direction
↑ axial
Load capacity
14.21 kg / 139.45 N
Magnetic Induction
286.36 mT / 2864 Gs
Coating
[NiCuNi] Nickel
18.45 ZŁ with VAT / pcs + price for transport
15.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 22 499 98 98
or send us a note using
our online form
through our site.
Weight as well as appearance of a neodymium magnet can be checked with our
modular calculator.
Orders submitted before 14:00 will be dispatched today!
Technical of the product - MPL 40x15x6 / N38 - lamellar magnet
Specification / characteristics - MPL 40x15x6 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020155 |
| GTIN/EAN | 5906301811619 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 15 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 27 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 14.21 kg / 139.45 N |
| Magnetic Induction ~ ? | 286.36 mT / 2864 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 modeling of the product - data
These values represent the outcome of a mathematical analysis. Values rely on algorithms for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs gap) - interaction chart
MPL 40x15x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2863 Gs
286.3 mT
|
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
|
critical level |
| 1 mm |
2635 Gs
263.5 mT
|
12.04 kg / 26.55 LBS
12041.8 g / 118.1 N
|
critical level |
| 2 mm |
2385 Gs
238.5 mT
|
9.86 kg / 21.74 LBS
9859.1 g / 96.7 N
|
strong |
| 3 mm |
2132 Gs
213.2 mT
|
7.88 kg / 17.37 LBS
7880.1 g / 77.3 N
|
strong |
| 5 mm |
1670 Gs
167.0 mT
|
4.84 kg / 10.66 LBS
4837.1 g / 47.5 N
|
strong |
| 10 mm |
903 Gs
90.3 mT
|
1.41 kg / 3.11 LBS
1412.2 g / 13.9 N
|
safe |
| 15 mm |
520 Gs
52.0 mT
|
0.47 kg / 1.03 LBS
469.2 g / 4.6 N
|
safe |
| 20 mm |
320 Gs
32.0 mT
|
0.18 kg / 0.39 LBS
177.7 g / 1.7 N
|
safe |
| 30 mm |
141 Gs
14.1 mT
|
0.03 kg / 0.08 LBS
34.5 g / 0.3 N
|
safe |
| 50 mm |
41 Gs
4.1 mT
|
0.00 kg / 0.01 LBS
3.0 g / 0.0 N
|
safe |
Table 2: Slippage load (wall)
MPL 40x15x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.84 kg / 6.27 LBS
2842.0 g / 27.9 N
|
| 1 mm | Stal (~0.2) |
2.41 kg / 5.31 LBS
2408.0 g / 23.6 N
|
| 2 mm | Stal (~0.2) |
1.97 kg / 4.35 LBS
1972.0 g / 19.3 N
|
| 3 mm | Stal (~0.2) |
1.58 kg / 3.47 LBS
1576.0 g / 15.5 N
|
| 5 mm | Stal (~0.2) |
0.97 kg / 2.13 LBS
968.0 g / 9.5 N
|
| 10 mm | Stal (~0.2) |
0.28 kg / 0.62 LBS
282.0 g / 2.8 N
|
| 15 mm | Stal (~0.2) |
0.09 kg / 0.21 LBS
94.0 g / 0.9 N
|
| 20 mm | Stal (~0.2) |
0.04 kg / 0.08 LBS
36.0 g / 0.4 N
|
| 30 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - vertical pull
MPL 40x15x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
4.26 kg / 9.40 LBS
4263.0 g / 41.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.84 kg / 6.27 LBS
2842.0 g / 27.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.42 kg / 3.13 LBS
1421.0 g / 13.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
7.11 kg / 15.66 LBS
7105.0 g / 69.7 N
|
Table 4: Material efficiency (saturation) - power losses
MPL 40x15x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.71 kg / 1.57 LBS
710.5 g / 7.0 N
|
| 1 mm |
|
1.78 kg / 3.92 LBS
1776.3 g / 17.4 N
|
| 2 mm |
|
3.55 kg / 7.83 LBS
3552.5 g / 34.9 N
|
| 3 mm |
|
5.33 kg / 11.75 LBS
5328.8 g / 52.3 N
|
| 5 mm |
|
8.88 kg / 19.58 LBS
8881.3 g / 87.1 N
|
| 10 mm |
|
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
|
| 11 mm |
|
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
|
| 12 mm |
|
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MPL 40x15x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
14.21 kg / 31.33 LBS
14210.0 g / 139.4 N
|
OK |
| 40 °C | -2.2% |
13.90 kg / 30.64 LBS
13897.4 g / 136.3 N
|
OK |
| 60 °C | -4.4% |
13.58 kg / 29.95 LBS
13584.8 g / 133.3 N
|
|
| 80 °C | -6.6% |
13.27 kg / 29.26 LBS
13272.1 g / 130.2 N
|
|
| 100 °C | -28.8% |
10.12 kg / 22.31 LBS
10117.5 g / 99.3 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MPL 40x15x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
30.32 kg / 66.84 LBS
4 334 Gs
|
4.55 kg / 10.03 LBS
4547 g / 44.6 N
|
N/A |
| 1 mm |
28.06 kg / 61.86 LBS
5 508 Gs
|
4.21 kg / 9.28 LBS
4209 g / 41.3 N
|
25.25 kg / 55.67 LBS
~0 Gs
|
| 2 mm |
25.69 kg / 56.64 LBS
5 271 Gs
|
3.85 kg / 8.50 LBS
3854 g / 37.8 N
|
23.12 kg / 50.97 LBS
~0 Gs
|
| 3 mm |
23.33 kg / 51.43 LBS
5 023 Gs
|
3.50 kg / 7.71 LBS
3499 g / 34.3 N
|
21.00 kg / 46.29 LBS
~0 Gs
|
| 5 mm |
18.85 kg / 41.56 LBS
4 515 Gs
|
2.83 kg / 6.23 LBS
2828 g / 27.7 N
|
16.97 kg / 37.40 LBS
~0 Gs
|
| 10 mm |
10.32 kg / 22.75 LBS
3 341 Gs
|
1.55 kg / 3.41 LBS
1548 g / 15.2 N
|
9.29 kg / 20.48 LBS
~0 Gs
|
| 20 mm |
3.01 kg / 6.64 LBS
1 805 Gs
|
0.45 kg / 1.00 LBS
452 g / 4.4 N
|
2.71 kg / 5.98 LBS
~0 Gs
|
| 50 mm |
0.16 kg / 0.35 LBS
416 Gs
|
0.02 kg / 0.05 LBS
24 g / 0.2 N
|
0.14 kg / 0.32 LBS
~0 Gs
|
| 60 mm |
0.07 kg / 0.16 LBS
282 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.07 kg / 0.15 LBS
~0 Gs
|
| 70 mm |
0.04 kg / 0.08 LBS
199 Gs
|
0.01 kg / 0.01 LBS
5 g / 0.1 N
|
0.03 kg / 0.07 LBS
~0 Gs
|
| 80 mm |
0.02 kg / 0.04 LBS
144 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 90 mm |
0.01 kg / 0.02 LBS
108 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.02 LBS
~0 Gs
|
| 100 mm |
0.01 kg / 0.01 LBS
83 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MPL 40x15x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 8.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 7.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (kinetic energy) - collision effects
MPL 40x15x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.53 km/h
(6.81 m/s)
|
0.63 J | |
| 30 mm |
40.13 km/h
(11.15 m/s)
|
1.68 J | |
| 50 mm |
51.74 km/h
(14.37 m/s)
|
2.79 J | |
| 100 mm |
73.16 km/h
(20.32 m/s)
|
5.58 J |
Table 9: Coating parameters (durability)
MPL 40x15x6 / 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 40x15x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 16 905 Mx | 169.0 µWb |
| Pc Coefficient | 0.31 | Low (Flat) |
Table 11: Submerged application
MPL 40x15x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 14.21 kg | Standard |
| Water (riverbed) |
16.27 kg
(+2.06 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet holds only a fraction of its nominal pull.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.
3. Heat tolerance
*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) = 0.31
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.
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 |
Other proposals
Pros and cons of Nd2Fe14B magnets.
Pros
- Their strength remains stable, and after approximately ten years it drops only by ~1% (theoretically),
- They show high resistance to demagnetization induced by external magnetic fields,
- In other words, due to the shiny finish of gold, the element becomes visually attractive,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
- Possibility of precise creating as well as adapting to precise applications,
- Universal use in advanced technology sectors – they are utilized in computer drives, motor assemblies, advanced medical instruments, and complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Limitations
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Holding force characteristics
Detachment force of the magnet in optimal conditions – what it depends on?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness reaches at least 10 mm
- with an ideally smooth touching surface
- without any air gap between the magnet and steel
- during pulling in a direction vertical to the plane
- in stable room temperature
Key elements affecting lifting force
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Base massiveness – too thin steel causes magnetic saturation, causing part of the power to be escaped into the air.
- Chemical composition of the base – mild steel gives the best results. Higher carbon content lower magnetic properties and holding force.
- Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
- Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Precautions when working with neodymium magnets
Keep away from electronics
A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.
Protective goggles
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets leads to them breaking into shards.
Serious injuries
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.
Flammability
Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.
Adults only
Neodymium magnets are not toys. Accidental ingestion of a few magnets can lead to them attracting across intestines, which constitutes a critical condition and requires urgent medical intervention.
Safe distance
Device Safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).
Heat warning
Standard neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Handling guide
Handle magnets consciously. Their immense force can shock even professionals. Stay alert and do not underestimate their force.
Nickel coating and allergies
Some people suffer from a sensitization to nickel, which is the common plating for neodymium magnets. Prolonged contact may cause an allergic reaction. We suggest wear protective gloves.
Medical implants
Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.
