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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Technical specification - 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 |
Engineering modeling of the product - data
The following values represent the outcome of a mathematical analysis. Values were calculated on models for the material Nd2Fe14B. Operational parameters may deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.
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
|
strong |
| 1 mm |
1761 Gs
176.1 mT
|
2.84 kg / 6.27 lbs
2842.9 g / 27.9 N
|
strong |
| 2 mm |
1610 Gs
161.0 mT
|
2.38 kg / 5.24 lbs
2376.8 g / 23.3 N
|
strong |
| 3 mm |
1440 Gs
144.0 mT
|
1.90 kg / 4.19 lbs
1901.0 g / 18.6 N
|
weak grip |
| 5 mm |
1099 Gs
109.9 mT
|
1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
|
weak grip |
| 10 mm |
508 Gs
50.8 mT
|
0.24 kg / 0.52 lbs
236.4 g / 2.3 N
|
weak grip |
| 15 mm |
245 Gs
24.5 mT
|
0.06 kg / 0.12 lbs
55.2 g / 0.5 N
|
weak grip |
| 20 mm |
131 Gs
13.1 mT
|
0.02 kg / 0.03 lbs
15.7 g / 0.2 N
|
weak grip |
| 30 mm |
48 Gs
4.8 mT
|
0.00 kg / 0.00 lbs
2.1 g / 0.0 N
|
weak grip |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
weak grip |
Table 2: Vertical force (vertical surface)
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: Vertical assembly (shearing) - vertical pull
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: Working in heat (stability) - resistance threshold
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) - forces in the system
MPL 17x17x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (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: Protective zones (electronics) - 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 |
| Mechanical watch | 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 (kinetic energy) - 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: Corrosion resistance
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: Electrical data (Flux)
MPL 17x17x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 509 Mx | 65.1 µWb |
| Pc Coefficient | 0.23 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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. Vertical hold
*Note: 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) severely weakens 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) = 0.23
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Pros and cons of rare earth magnets.
Advantages
- Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
- Neodymium magnets are exceptionally resistant to demagnetization caused by external interference,
- A magnet with a smooth gold surface has an effective appearance,
- Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to versatility in shaping and the ability to modify to unusual requirements,
- Huge importance in modern industrial fields – they serve a role in data components, electromotive mechanisms, medical equipment, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in small systems
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum lifting capacity of the magnet – what it depends on?
- using a sheet made of low-carbon steel, functioning as a ideal flux conductor
- with a cross-section of at least 10 mm
- with an ground touching surface
- under conditions of no distance (surface-to-surface)
- under vertical application of breakaway force (90-degree angle)
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Distance (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, rust or dirt).
- Angle of force application – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Thermal factor – high temperature reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.
Safe handling of NdFeB magnets
Danger to the youngest
Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.
Power loss in heat
Keep cool. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).
ICD Warning
Individuals with a ICD must keep an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.
Dust is flammable
Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Safe operation
Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.
Fragile material
NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.
Compass and GPS
An intense magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to prevent damaging the sensors.
Electronic hazard
Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.
Metal Allergy
Certain individuals experience a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling may cause a rash. It is best to use safety gloves.
Crushing risk
Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.
