MPL 40x10x4 / N38 - lamellar magnet
lamellar magnet
Catalog no 020150
GTIN: 5906301811565
length
40 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
12 g
Magnetization Direction
↑ axial
Load capacity
9.31 kg / 91.33 N
Magnetic Induction
275.57 mT / 2756 Gs
Coating
[NiCuNi] Nickel
4.87 ZŁ with VAT / pcs + price for transport
3.96 ZŁ net + 23% VAT / pcs
bulk discounts:
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MPL 40x10x4 / N38 - lamellar magnet
Specification / characteristics MPL 40x10x4 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020150 |
| GTIN | 5906301811565 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 40 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 12 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 9.31 kg / 91.33 N |
| Magnetic Induction ~ ? | 275.57 mT / 2756 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 | T |
| 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 106 | °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 information constitute the outcome of a mathematical calculation. Results rely on algorithms for the material NdFeB. Operational conditions may differ from theoretical values. Please consider these data as a reference point when designing systems.
MPL 40x10x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg) | Risk Status |
|---|---|---|---|
| 0 mm |
2755 Gs
275.5 mT
|
9.31 kg / 9310.0 g
91.3 N
|
medium risk |
| 1 mm |
2413 Gs
241.3 mT
|
7.14 kg / 7143.1 g
70.1 N
|
medium risk |
| 2 mm |
2044 Gs
204.4 mT
|
5.13 kg / 5128.9 g
50.3 N
|
medium risk |
| 3 mm |
1703 Gs
170.3 mT
|
3.56 kg / 3559.5 g
34.9 N
|
medium risk |
| 5 mm |
1173 Gs
117.3 mT
|
1.69 kg / 1688.2 g
16.6 N
|
safe |
| 10 mm |
522 Gs
52.2 mT
|
0.33 kg / 334.9 g
3.3 N
|
safe |
| 15 mm |
277 Gs
27.7 mT
|
0.09 kg / 94.2 g
0.9 N
|
safe |
| 20 mm |
163 Gs
16.3 mT
|
0.03 kg / 32.8 g
0.3 N
|
safe |
| 30 mm |
69 Gs
6.9 mT
|
0.01 kg / 5.8 g
0.1 N
|
safe |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.5 g
0.0 N
|
safe |
MPL 40x10x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.86 kg / 1862.0 g
18.3 N
|
| 1 mm | Stal (~0.2) |
1.43 kg / 1428.0 g
14.0 N
|
| 2 mm | Stal (~0.2) |
1.03 kg / 1026.0 g
10.1 N
|
| 3 mm | Stal (~0.2) |
0.71 kg / 712.0 g
7.0 N
|
| 5 mm | Stal (~0.2) |
0.34 kg / 338.0 g
3.3 N
|
| 10 mm | Stal (~0.2) |
0.07 kg / 66.0 g
0.6 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 18.0 g
0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 6.0 g
0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 2.0 g
0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.0 g
0.0 N
|
MPL 40x10x4 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.79 kg / 2793.0 g
27.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.86 kg / 1862.0 g
18.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.93 kg / 931.0 g
9.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.66 kg / 4655.0 g
45.7 N
|
MPL 40x10x4 / N38
| Steel thickness (mm) | % power | Real pull force (kg) |
|---|---|---|
| 0.5 mm |
|
0.93 kg / 931.0 g
9.1 N
|
| 1 mm |
|
2.33 kg / 2327.5 g
22.8 N
|
| 2 mm |
|
4.66 kg / 4655.0 g
45.7 N
|
| 5 mm |
|
9.31 kg / 9310.0 g
91.3 N
|
| 10 mm |
|
9.31 kg / 9310.0 g
91.3 N
|
MPL 40x10x4 / N38
| Ambient temp. (°C) | Power loss | Remaining pull | Status |
|---|---|---|---|
| 20 °C | 0.0% |
9.31 kg / 9310.0 g
91.3 N
|
OK |
| 40 °C | -2.2% |
9.11 kg / 9105.2 g
89.3 N
|
OK |
| 60 °C | -4.4% |
8.90 kg / 8900.4 g
87.3 N
|
|
| 80 °C | -6.6% |
8.70 kg / 8695.5 g
85.3 N
|
|
| 100 °C | -28.8% |
6.63 kg / 6628.7 g
65.0 N
|
MPL 40x10x4 / N38
| Gap (mm) | Attraction (kg) (N-S) | Repulsion (kg) (N-N) |
|---|---|---|
| 0 mm |
18.71 kg / 18711 g
183.6 N
4 164 Gs
|
N/A |
| 1 mm |
16.57 kg / 16572 g
162.6 N
5 185 Gs
|
14.91 kg / 14915 g
146.3 N
~0 Gs
|
| 2 mm |
14.36 kg / 14356 g
140.8 N
4 826 Gs
|
12.92 kg / 12920 g
126.7 N
~0 Gs
|
| 3 mm |
12.24 kg / 12238 g
120.1 N
4 455 Gs
|
11.01 kg / 11015 g
108.1 N
~0 Gs
|
| 5 mm |
8.61 kg / 8609 g
84.5 N
3 737 Gs
|
7.75 kg / 7748 g
76.0 N
~0 Gs
|
| 10 mm |
3.39 kg / 3393 g
33.3 N
2 346 Gs
|
3.05 kg / 3054 g
30.0 N
~0 Gs
|
| 20 mm |
0.67 kg / 673 g
6.6 N
1 045 Gs
|
0.61 kg / 606 g
5.9 N
~0 Gs
|
| 50 mm |
0.03 kg / 26 g
0.3 N
207 Gs
|
0.02 kg / 24 g
0.2 N
~0 Gs
|
MPL 40x10x4 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
MPL 40x10x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.72 km/h
(7.98 m/s)
|
0.38 J | |
| 30 mm |
48.67 km/h
(13.52 m/s)
|
1.10 J | |
| 50 mm |
62.82 km/h
(17.45 m/s)
|
1.83 J | |
| 100 mm |
88.83 km/h
(24.68 m/s)
|
3.65 J |
MPL 40x10x4 / 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) |
MPL 40x10x4 / N38
| Parameter | Value | Jedn. SI / Opis |
|---|---|---|
| Strumień (Flux) | 9 840 Mx | 98.4 µWb |
| Współczynnik Pc | 0.26 | Niski (Płaski) |
MPL 40x10x4 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 9.31 kg | Standard |
| Water (riverbed) |
10.66 kg
(+1.35 kg Buoyancy gain)
|
+14.5% |
1. Montaż na Ścianie (Ześlizg)
*Uwaga: Na pionowej ścianie magnes utrzyma tylko ok. 20-30% tego co na suficie.
2. Wpływ Grubości Blachy
*Cienka blacha (np. obudowa PC 0.5mm) drastycznie osłabia magnes.
3. Wytrzymałość Temperaturowa
*Dla materiału N38 granica bezpieczeństwa to 80°C.
Jak rozdzielać?
Nie próbuj odrywać magnesów siłą!
Zawsze zsuwaj je na bok krawędzi stołu.
Elektronika
Trzymaj z dala od dysków HDD, kart płatniczych i telefonów.
Rozruszniki Serca
Osoby z rozrusznikiem muszą zachować dystans min. 10 cm.
Nie dla dzieci
Ryzyko połknięcia. Połknięcie dwóch magnesów grozi śmiercią.
Kruchy materiał
Magnes to ceramika! Uderzenie o inny magnes spowoduje odpryski.
Do czego użyć tego magnesu?
Sprawdzone zastosowania dla wymiaru 15x10x2 mm
Elektronika i Czujniki
Idealny jako element wyzwalający dla czujników Halla oraz kontaktronów w systemach alarmowych. Płaski kształt (2mm) pozwala na ukrycie go w wąskich szczelinach obudowy.
Modelarstwo i Druk 3D
Stosowany do tworzenia niewidocznych zamknięć w modelach drukowanych 3D. Można go wprasować w wydruk lub wkleić w kieszeń zaprojektowaną w modelu CAD.
Meble i Fronty
Używany jako "domykacz" lekkich drzwiczek szafkowych, gdzie standardowe magnesy meblowe są za grube. Wymaga wklejenia w płytkie podfrezowanie.
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Pros as well as cons of rare earth magnets.
In addition to their pulling strength, neodymium magnets provide the following advantages:
- They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
- They show high resistance to demagnetization induced by presence of other magnetic fields,
- In other words, due to the smooth surface of silver, the element gains a professional look,
- The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Thanks to freedom in shaping and the capacity to customize to complex applications,
- Wide application in high-tech industry – they find application in computer drives, electromotive mechanisms, advanced medical instruments, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in compact constructions
Disadvantages of neodymium magnets:
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We recommend a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Magnetic strength at its maximum – what affects it?
The declared magnet strength concerns the maximum value, recorded under optimal environment, namely:
- on a base made of structural steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- under axial force vector (90-degree angle)
- at room temperature
Magnet lifting force in use – key factors
Real force is affected by specific conditions, such as (from most important):
- Clearance – the presence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 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.
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
- Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap {between} the magnet’s surface and the plate decreases the lifting capacity.
Pros as well as cons of rare earth magnets.
In addition to their pulling strength, neodymium magnets provide the following advantages:
- They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
- They show high resistance to demagnetization induced by presence of other magnetic fields,
- In other words, due to the smooth surface of silver, the element gains a professional look,
- The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Thanks to freedom in shaping and the capacity to customize to complex applications,
- Wide application in high-tech industry – they find application in computer drives, electromotive mechanisms, advanced medical instruments, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in compact constructions
Disadvantages of neodymium magnets:
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We recommend a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
- Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets can be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Magnetic strength at its maximum – what affects it?
The declared magnet strength concerns the maximum value, recorded under optimal environment, namely:
- on a base made of structural steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- under axial force vector (90-degree angle)
- at room temperature
Magnet lifting force in use – key factors
Real force is affected by specific conditions, such as (from most important):
- Clearance – the presence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 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.
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
- Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).
* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap {between} the magnet’s surface and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Magnetic media
Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Do not drill into magnets
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.
ICD Warning
For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.
Protective goggles
Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Nickel coating and allergies
It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose coated magnets.
Powerful field
Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.
Physical harm
Large magnets can smash fingers instantly. Never put your hand between two strong magnets.
Heat warning
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Keep away from children
Absolutely store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are fatal.
Precision electronics
Be aware: rare earth magnets generate a field that interferes with precision electronics. Maintain a separation from your phone, device, and GPS.
Important!
Want to know more? Check our post: Are neodymium magnets dangerous?
