MPL 17x17x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020124
GTIN/EAN: 5906301811305
length
17 mm [±0,1 mm]
Width
17 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
6.5 g
Magnetization Direction
↑ axial
Load capacity
3.22 kg / 31.54 N
Magnetic Induction
187.48 mT / 1875 Gs
Coating
[NiCuNi] Nickel
4.71 ZŁ with VAT / pcs + price for transport
3.83 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 17x17x3 / N38 - lamellar magnet
Specification / characteristics - MPL 17x17x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020124 |
| GTIN/EAN | 5906301811305 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 17 mm [±0,1 mm] |
| Width | 17 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 6.5 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.22 kg / 31.54 N |
| Magnetic Induction ~ ? | 187.48 mT / 1875 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 simulation of the assembly - technical parameters
Presented data represent the result of a engineering simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world parameters may deviate from the simulation results. Use these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - power drop
MPL 17x17x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1874 Gs
187.4 mT
|
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
warning |
| 1 mm |
1761 Gs
176.1 mT
|
2.84 kg / 6.27 lbs
2842.9 g / 27.9 N
|
warning |
| 2 mm |
1610 Gs
161.0 mT
|
2.38 kg / 5.24 lbs
2376.8 g / 23.3 N
|
warning |
| 3 mm |
1440 Gs
144.0 mT
|
1.90 kg / 4.19 lbs
1901.0 g / 18.6 N
|
safe |
| 5 mm |
1099 Gs
109.9 mT
|
1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
|
safe |
| 10 mm |
508 Gs
50.8 mT
|
0.24 kg / 0.52 lbs
236.4 g / 2.3 N
|
safe |
| 15 mm |
245 Gs
24.5 mT
|
0.06 kg / 0.12 lbs
55.2 g / 0.5 N
|
safe |
| 20 mm |
131 Gs
13.1 mT
|
0.02 kg / 0.03 lbs
15.7 g / 0.2 N
|
safe |
| 30 mm |
48 Gs
4.8 mT
|
0.00 kg / 0.00 lbs
2.1 g / 0.0 N
|
safe |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
Table 2: Vertical force (wall)
MPL 17x17x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.64 kg / 1.42 lbs
644.0 g / 6.3 N
|
| 1 mm | Stal (~0.2) |
0.57 kg / 1.25 lbs
568.0 g / 5.6 N
|
| 2 mm | Stal (~0.2) |
0.48 kg / 1.05 lbs
476.0 g / 4.7 N
|
| 3 mm | Stal (~0.2) |
0.38 kg / 0.84 lbs
380.0 g / 3.7 N
|
| 5 mm | Stal (~0.2) |
0.22 kg / 0.49 lbs
222.0 g / 2.2 N
|
| 10 mm | Stal (~0.2) |
0.05 kg / 0.11 lbs
48.0 g / 0.5 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
12.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 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 17x17x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.64 kg / 1.42 lbs
644.0 g / 6.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N
|
Table 4: Material efficiency (saturation) - power losses
MPL 17x17x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
|
| 1 mm |
|
0.81 kg / 1.77 lbs
805.0 g / 7.9 N
|
| 2 mm |
|
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N
|
| 3 mm |
|
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
|
| 5 mm |
|
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
| 10 mm |
|
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
| 11 mm |
|
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
| 12 mm |
|
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
Table 5: Thermal resistance (material behavior) - power drop
MPL 17x17x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
|
OK |
| 40 °C | -2.2% |
3.15 kg / 6.94 lbs
3149.2 g / 30.9 N
|
OK |
| 60 °C | -4.4% |
3.08 kg / 6.79 lbs
3078.3 g / 30.2 N
|
|
| 80 °C | -6.6% |
3.01 kg / 6.63 lbs
3007.5 g / 29.5 N
|
|
| 100 °C | -28.8% |
2.29 kg / 5.05 lbs
2292.6 g / 22.5 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 17x17x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
6.26 kg / 13.80 lbs
3 313 Gs
|
0.94 kg / 2.07 lbs
939 g / 9.2 N
|
N/A |
| 1 mm |
5.93 kg / 13.07 lbs
3 648 Gs
|
0.89 kg / 1.96 lbs
889 g / 8.7 N
|
5.33 kg / 11.76 lbs
~0 Gs
|
| 2 mm |
5.53 kg / 12.19 lbs
3 523 Gs
|
0.83 kg / 1.83 lbs
829 g / 8.1 N
|
4.97 kg / 10.97 lbs
~0 Gs
|
| 3 mm |
5.08 kg / 11.21 lbs
3 379 Gs
|
0.76 kg / 1.68 lbs
763 g / 7.5 N
|
4.58 kg / 10.09 lbs
~0 Gs
|
| 5 mm |
4.15 kg / 9.16 lbs
3 053 Gs
|
0.62 kg / 1.37 lbs
623 g / 6.1 N
|
3.74 kg / 8.24 lbs
~0 Gs
|
| 10 mm |
2.15 kg / 4.75 lbs
2 199 Gs
|
0.32 kg / 0.71 lbs
323 g / 3.2 N
|
1.94 kg / 4.27 lbs
~0 Gs
|
| 20 mm |
0.46 kg / 1.01 lbs
1 016 Gs
|
0.07 kg / 0.15 lbs
69 g / 0.7 N
|
0.41 kg / 0.91 lbs
~0 Gs
|
| 50 mm |
0.01 kg / 0.02 lbs
153 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.02 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 lbs
96 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 lbs
64 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
44 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
32 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
24 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (implants) - precautionary measures
MPL 17x17x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (cracking risk) - warning
MPL 17x17x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.45 km/h
(6.52 m/s)
|
0.14 J | |
| 30 mm |
38.89 km/h
(10.80 m/s)
|
0.38 J | |
| 50 mm |
50.19 km/h
(13.94 m/s)
|
0.63 J | |
| 100 mm |
70.98 km/h
(19.72 m/s)
|
1.26 J |
Table 9: Surface protection spec
MPL 17x17x3 / 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 (Pc)
MPL 17x17x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 509 Mx | 65.1 µWb |
| Pc Coefficient | 0.23 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 17x17x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.22 kg | Standard |
| Water (riverbed) |
3.69 kg
(+0.47 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical surface, the magnet holds just approx. 20-30% of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. computer 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) = 0.23
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths and weaknesses of neodymium magnets.
Benefits
- Their strength is maintained, and after around ten years it decreases only by ~1% (according to research),
- Magnets effectively defend themselves against loss of magnetization caused by foreign field sources,
- The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Magnetic induction on the working part of the magnet turns out to be exceptional,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Possibility of precise modeling and modifying to concrete requirements,
- Versatile presence in modern industrial fields – they are commonly used in HDD drives, brushless drives, medical equipment, also technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We recommend cover - magnetic holder, due to difficulties in creating nuts inside the magnet and complex shapes.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Furthermore, tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- on a block made of structural steel, effectively closing the magnetic field
- with a cross-section minimum 10 mm
- with a surface perfectly flat
- with total lack of distance (without paint)
- under axial force direction (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical aspects of lifting capacity – factors
- Clearance – existence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped into the air.
- Material composition – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface finish – full contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Nickel allergy
Certain individuals suffer from a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact can result in a rash. We recommend wear safety gloves.
Immense force
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Product not for children
These products are not intended for children. Accidental ingestion of a few magnets can lead to them attracting across intestines, which poses a critical condition and necessitates immediate surgery.
Pacemakers
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Protect data
Device Safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, timepieces).
Finger safety
Pinching hazard: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Fire risk
Powder produced during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Precision electronics
An intense magnetic field negatively affects the operation of compasses in phones and GPS navigation. Do not bring magnets near a smartphone to avoid damaging the sensors.
Heat sensitivity
Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.
Eye protection
Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.
