MPL 5x5x2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020173
GTIN/EAN: 5906301811794
length
5 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.38 g
Magnetization Direction
↑ axial
Load capacity
0.77 kg / 7.57 N
Magnetic Induction
360.52 mT / 3605 Gs
Coating
[NiCuNi] Nickel
0.308 ZŁ with VAT / pcs + price for transport
0.250 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MPL 5x5x2 / N38 - lamellar magnet
Specification / characteristics - MPL 5x5x2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020173 |
| GTIN/EAN | 5906301811794 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 5 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 0.38 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.77 kg / 7.57 N |
| Magnetic Induction ~ ? | 360.52 mT / 3605 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 |
Physical simulation of the product - data
The following data constitute the result of a engineering calculation. Values were calculated on models for the material Nd2Fe14B. Operational parameters may differ from theoretical values. Treat these data as a reference point during assembly planning.
Table 1: Static pull force (force vs distance) - characteristics
MPL 5x5x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3601 Gs
360.1 mT
|
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
weak grip |
| 1 mm |
2436 Gs
243.6 mT
|
0.35 kg / 0.78 LBS
352.2 g / 3.5 N
|
weak grip |
| 2 mm |
1464 Gs
146.4 mT
|
0.13 kg / 0.28 LBS
127.3 g / 1.2 N
|
weak grip |
| 3 mm |
872 Gs
87.2 mT
|
0.05 kg / 0.10 LBS
45.1 g / 0.4 N
|
weak grip |
| 5 mm |
347 Gs
34.7 mT
|
0.01 kg / 0.02 LBS
7.2 g / 0.1 N
|
weak grip |
| 10 mm |
68 Gs
6.8 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
weak grip |
| 15 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
10 Gs
1.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding hold (vertical surface)
MPL 5x5x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.15 kg / 0.34 LBS
154.0 g / 1.5 N
|
| 1 mm | Stal (~0.2) |
0.07 kg / 0.15 LBS
70.0 g / 0.7 N
|
| 2 mm | Stal (~0.2) |
0.03 kg / 0.06 LBS
26.0 g / 0.3 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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) - vertical pull
MPL 5x5x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.23 kg / 0.51 LBS
231.0 g / 2.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.15 kg / 0.34 LBS
154.0 g / 1.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.08 kg / 0.17 LBS
77.0 g / 0.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.39 kg / 0.85 LBS
385.0 g / 3.8 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 5x5x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.08 kg / 0.17 LBS
77.0 g / 0.8 N
|
| 1 mm |
|
0.19 kg / 0.42 LBS
192.5 g / 1.9 N
|
| 2 mm |
|
0.39 kg / 0.85 LBS
385.0 g / 3.8 N
|
| 3 mm |
|
0.58 kg / 1.27 LBS
577.5 g / 5.7 N
|
| 5 mm |
|
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
| 10 mm |
|
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
| 11 mm |
|
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
| 12 mm |
|
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MPL 5x5x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.77 kg / 1.70 LBS
770.0 g / 7.6 N
|
OK |
| 40 °C | -2.2% |
0.75 kg / 1.66 LBS
753.1 g / 7.4 N
|
OK |
| 60 °C | -4.4% |
0.74 kg / 1.62 LBS
736.1 g / 7.2 N
|
|
| 80 °C | -6.6% |
0.72 kg / 1.59 LBS
719.2 g / 7.1 N
|
|
| 100 °C | -28.8% |
0.55 kg / 1.21 LBS
548.2 g / 5.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 5x5x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.00 kg / 4.41 LBS
5 058 Gs
|
0.30 kg / 0.66 LBS
300 g / 2.9 N
|
N/A |
| 1 mm |
1.42 kg / 3.13 LBS
6 070 Gs
|
0.21 kg / 0.47 LBS
213 g / 2.1 N
|
1.28 kg / 2.82 LBS
~0 Gs
|
| 2 mm |
0.91 kg / 2.02 LBS
4 871 Gs
|
0.14 kg / 0.30 LBS
137 g / 1.3 N
|
0.82 kg / 1.81 LBS
~0 Gs
|
| 3 mm |
0.56 kg / 1.23 LBS
3 801 Gs
|
0.08 kg / 0.18 LBS
83 g / 0.8 N
|
0.50 kg / 1.10 LBS
~0 Gs
|
| 5 mm |
0.20 kg / 0.43 LBS
2 254 Gs
|
0.03 kg / 0.06 LBS
29 g / 0.3 N
|
0.18 kg / 0.39 LBS
~0 Gs
|
| 10 mm |
0.02 kg / 0.04 LBS
695 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
136 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
11 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
7 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
4 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
3 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
2 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
1 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 5x5x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 3.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 2.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Car key | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Collisions (kinetic energy) - warning
MPL 5x5x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
45.41 km/h
(12.61 m/s)
|
0.03 J | |
| 30 mm |
78.63 km/h
(21.84 m/s)
|
0.09 J | |
| 50 mm |
101.51 km/h
(28.20 m/s)
|
0.15 J | |
| 100 mm |
143.56 km/h
(39.88 m/s)
|
0.30 J |
Table 9: Coating parameters (durability)
MPL 5x5x2 / 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 5x5x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 940 Mx | 9.4 µWb |
| Pc Coefficient | 0.46 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MPL 5x5x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.77 kg | Standard |
| Water (riverbed) |
0.88 kg
(+0.11 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical surface, the magnet holds merely ~20% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Power loss vs temp
*For N38 grade, the critical 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.
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 |
Other proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They do not lose strength, even during nearly ten years – the reduction in lifting capacity is only ~1% (theoretically),
- Magnets perfectly resist against loss of magnetization caused by ambient magnetic noise,
- Thanks to the elegant finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an modern appearance,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- 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...
- Thanks to versatility in constructing and the ability to adapt to complex applications,
- Fundamental importance in future technologies – they are utilized in HDD drives, electric drive systems, advanced medical instruments, as well as complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices
Disadvantages
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
- Neodymium magnets decrease their force 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
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
- Due to expensive raw materials, their price is relatively high,
Pull force analysis
Magnetic strength at its maximum – what affects it?
- using a base made of mild steel, functioning as a circuit closing element
- possessing a thickness of minimum 10 mm to avoid saturation
- with a plane free of scratches
- with zero gap (without impurities)
- during pulling in a direction perpendicular to the plane
- in stable room temperature
What influences lifting capacity in practice
- Gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Angle of force application – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Base smoothness – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.
H&S for magnets
Heat warning
Keep cool. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).
Threat to electronics
Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, medical aids, timepieces).
Health Danger
Warning for patients: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.
Crushing force
Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Metal Allergy
It is widely known that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact or select coated magnets.
Choking Hazard
These products are not suitable for play. Swallowing multiple magnets may result in them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.
Flammability
Machining of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Caution required
Handle magnets consciously. Their immense force can shock even experienced users. Be vigilant and do not underestimate their force.
Eye protection
Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Compass and GPS
An intense magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Maintain magnets near a device to prevent damaging the sensors.
