MPL 5x5x1.2 / N38 - lamellar magnet
lamellar magnet
Catalog no 020171
GTIN/EAN: 5906301811770
length
5 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
1.2 mm [±0,1 mm]
Weight
0.22 g
Magnetization Direction
↑ axial
Load capacity
0.44 kg / 4.28 N
Magnetic Induction
245.17 mT / 2452 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MPL 5x5x1.2 / N38 - lamellar magnet
Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020171 |
| GTIN/EAN | 5906301811770 |
| 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 | 1.2 mm [±0,1 mm] |
| Weight | 0.22 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.44 kg / 4.28 N |
| Magnetic Induction ~ ? | 245.17 mT / 2452 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 analysis of the product - report
The following data represent the direct effect of a engineering analysis. Values are based on algorithms for the material Nd2Fe14B. Real-world parameters might slightly differ. Treat these data as a supplementary guide during assembly planning.
Table 1: Static pull force (pull vs distance) - power drop
MPL 5x5x1.2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2450 Gs
245.0 mT
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
weak grip |
| 1 mm |
1739 Gs
173.9 mT
|
0.22 kg / 0.49 pounds
221.8 g / 2.2 N
|
weak grip |
| 2 mm |
1054 Gs
105.4 mT
|
0.08 kg / 0.18 pounds
81.4 g / 0.8 N
|
weak grip |
| 3 mm |
622 Gs
62.2 mT
|
0.03 kg / 0.06 pounds
28.4 g / 0.3 N
|
weak grip |
| 5 mm |
241 Gs
24.1 mT
|
0.00 kg / 0.01 pounds
4.3 g / 0.0 N
|
weak grip |
| 10 mm |
45 Gs
4.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 15 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical capacity (vertical surface)
MPL 5x5x1.2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.09 kg / 0.19 pounds
88.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
16.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MPL 5x5x1.2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.13 kg / 0.29 pounds
132.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.19 pounds
88.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 5x5x1.2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.24 pounds
110.0 g / 1.1 N
|
| 2 mm |
|
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
|
| 3 mm |
|
0.33 kg / 0.73 pounds
330.0 g / 3.2 N
|
| 5 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 10 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 11 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 12 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
Table 5: Thermal resistance (stability) - power drop
MPL 5x5x1.2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
OK |
| 40 °C | -2.2% |
0.43 kg / 0.95 pounds
430.3 g / 4.2 N
|
OK |
| 60 °C | -4.4% |
0.42 kg / 0.93 pounds
420.6 g / 4.1 N
|
|
| 80 °C | -6.6% |
0.41 kg / 0.91 pounds
411.0 g / 4.0 N
|
|
| 100 °C | -28.8% |
0.31 kg / 0.69 pounds
313.3 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MPL 5x5x1.2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.92 kg / 2.04 pounds
4 027 Gs
|
0.14 kg / 0.31 pounds
139 g / 1.4 N
|
N/A |
| 1 mm |
0.70 kg / 1.54 pounds
4 260 Gs
|
0.10 kg / 0.23 pounds
105 g / 1.0 N
|
0.63 kg / 1.39 pounds
~0 Gs
|
| 2 mm |
0.47 kg / 1.03 pounds
3 478 Gs
|
0.07 kg / 0.15 pounds
70 g / 0.7 N
|
0.42 kg / 0.93 pounds
~0 Gs
|
| 3 mm |
0.29 kg / 0.63 pounds
2 734 Gs
|
0.04 kg / 0.10 pounds
43 g / 0.4 N
|
0.26 kg / 0.57 pounds
~0 Gs
|
| 5 mm |
0.10 kg / 0.22 pounds
1 617 Gs
|
0.02 kg / 0.03 pounds
15 g / 0.1 N
|
0.09 kg / 0.20 pounds
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 pounds
482 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
90 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
7 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
4 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 5x5x1.2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.5 cm |
| Car key | 50 Gs (5.0 mT) | 1.0 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 (cracking risk) - collision effects
MPL 5x5x1.2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
45.11 km/h
(12.53 m/s)
|
0.02 J | |
| 30 mm |
78.12 km/h
(21.70 m/s)
|
0.05 J | |
| 50 mm |
100.85 km/h
(28.01 m/s)
|
0.09 J | |
| 100 mm |
142.63 km/h
(39.62 m/s)
|
0.17 J |
Table 9: Surface protection spec
MPL 5x5x1.2 / 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 5x5x1.2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 695 Mx | 7.0 µWb |
| Pc Coefficient | 0.30 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 5x5x1.2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.44 kg | Standard |
| Water (riverbed) |
0.50 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Power loss vs temp
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.30
The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros and cons of Nd2Fe14B magnets.
Advantages
- They do not lose power, even after approximately 10 years – the drop in lifting capacity is only ~1% (based on measurements),
- They are resistant to demagnetization induced by external magnetic fields,
- A magnet with a metallic silver surface is more attractive,
- Magnets are distinguished by huge magnetic induction on the outer layer,
- 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...
- Due to the option of accurate forming and customization to custom projects, NdFeB magnets can be modeled in a broad palette of forms and dimensions, which increases their versatility,
- Versatile presence in electronics industry – they are utilized in data components, drive modules, medical devices, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions
Cons
- At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's 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.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Due to limitations in creating nuts and complex shapes in magnets, we recommend using casing - magnetic mechanism.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Additionally, small components of these products are able to complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what affects it?
- on a base made of structural steel, effectively closing the magnetic flux
- with a cross-section minimum 10 mm
- with a plane perfectly flat
- with direct contact (without paint)
- under vertical force vector (90-degree angle)
- at room temperature
Lifting capacity in practice – influencing factors
- Air gap (between the magnet and the plate), as even a very small distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
- Angle of force application – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be lost into the air.
- Steel type – low-carbon steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
- Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the holding force.
Precautions when working with neodymium magnets
Protective goggles
NdFeB magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them shattering into shards.
GPS Danger
Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.
No play value
Always store magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are tragic.
Keep away from computers
Intense magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.
Health Danger
Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Allergy Warning
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, avoid direct skin contact or opt for versions in plastic housing.
Thermal limits
Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Flammability
Dust produced during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Physical harm
Big blocks can break fingers instantly. Do not place your hand between two attracting surfaces.
Caution required
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
