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 of the product - 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 |
Engineering modeling of the assembly - technical parameters
Presented data constitute the direct effect of a engineering simulation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Use these data as a reference point when designing systems.
Table 1: Static pull force (force 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 LBS
440.0 g / 4.3 N
|
safe |
| 1 mm |
1739 Gs
173.9 mT
|
0.22 kg / 0.49 LBS
221.8 g / 2.2 N
|
safe |
| 2 mm |
1054 Gs
105.4 mT
|
0.08 kg / 0.18 LBS
81.4 g / 0.8 N
|
safe |
| 3 mm |
622 Gs
62.2 mT
|
0.03 kg / 0.06 LBS
28.4 g / 0.3 N
|
safe |
| 5 mm |
241 Gs
24.1 mT
|
0.00 kg / 0.01 LBS
4.3 g / 0.0 N
|
safe |
| 10 mm |
45 Gs
4.5 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 15 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 20 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (wall)
MPL 5x5x1.2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
16.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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 (sliding) - behavior on slippery surfaces
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 LBS
132.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
|
Table 4: Material efficiency (saturation) - power losses
MPL 5x5x1.2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.24 LBS
110.0 g / 1.1 N
|
| 2 mm |
|
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
|
| 3 mm |
|
0.33 kg / 0.73 LBS
330.0 g / 3.2 N
|
| 5 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 10 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 11 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 12 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
Table 5: Thermal stability (material behavior) - thermal limit
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 LBS
440.0 g / 4.3 N
|
OK |
| 40 °C | -2.2% |
0.43 kg / 0.95 LBS
430.3 g / 4.2 N
|
OK |
| 60 °C | -4.4% |
0.42 kg / 0.93 LBS
420.6 g / 4.1 N
|
|
| 80 °C | -6.6% |
0.41 kg / 0.91 LBS
411.0 g / 4.0 N
|
|
| 100 °C | -28.8% |
0.31 kg / 0.69 LBS
313.3 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 5x5x1.2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.92 kg / 2.04 LBS
4 027 Gs
|
0.14 kg / 0.31 LBS
139 g / 1.4 N
|
N/A |
| 1 mm |
0.70 kg / 1.54 LBS
4 260 Gs
|
0.10 kg / 0.23 LBS
105 g / 1.0 N
|
0.63 kg / 1.39 LBS
~0 Gs
|
| 2 mm |
0.47 kg / 1.03 LBS
3 478 Gs
|
0.07 kg / 0.15 LBS
70 g / 0.7 N
|
0.42 kg / 0.93 LBS
~0 Gs
|
| 3 mm |
0.29 kg / 0.63 LBS
2 734 Gs
|
0.04 kg / 0.10 LBS
43 g / 0.4 N
|
0.26 kg / 0.57 LBS
~0 Gs
|
| 5 mm |
0.10 kg / 0.22 LBS
1 617 Gs
|
0.02 kg / 0.03 LBS
15 g / 0.1 N
|
0.09 kg / 0.20 LBS
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 LBS
482 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
90 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
7 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
4 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
3 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
2 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
1 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: Safety (HSE) (electronics) - 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 |
| Remote | 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: Dynamics (kinetic energy) - warning
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: Electrical 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: Underwater work (magnet fishing)
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. Shear force
*Caution: On a vertical wall, the magnet retains only a fraction of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Power loss vs temp
*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) = 0.30
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.
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
Strengths as well as weaknesses of rare earth magnets.
Strengths
- Their power is durable, and after around 10 years it drops only by ~1% (according to research),
- They are extremely resistant to demagnetization induced by external field influence,
- Thanks to the smooth finish, the plating of nickel, gold-plated, or silver gives an professional appearance,
- Neodymium magnets ensure maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in constructing and the capacity to modify to specific needs,
- Huge importance in electronics industry – they find application in HDD drives, drive modules, diagnostic systems, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices
Weaknesses
- At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing nuts and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these devices can be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets have a higher price 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 contributes to it?
- using a sheet made of mild steel, serving as a magnetic yoke
- whose transverse dimension equals approx. 10 mm
- with a surface perfectly flat
- under conditions of gap-free contact (metal-to-metal)
- for force applied at a right angle (in the magnet axis)
- at standard ambient temperature
Practical lifting capacity: influencing factors
- Distance (between the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Plate material – low-carbon steel attracts best. Alloy admixtures decrease magnetic permeability and holding force.
- Surface condition – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, however under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the load capacity.
Safe handling of NdFeB magnets
Eye protection
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets leads to them breaking into small pieces.
Implant safety
Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.
Swallowing risk
Absolutely store magnets away from children. Ingestion danger is significant, and the effects of magnets clamping inside the body are fatal.
Handling guide
Exercise caution. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can react.
Electronic devices
Data protection: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).
Precision electronics
Navigation devices and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Nickel allergy
Studies show that nickel (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and choose encased magnets.
Power loss in heat
Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. This process is irreversible.
Combustion hazard
Drilling and cutting of neodymium magnets carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Finger safety
Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!
