MPL 15x5x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020123
GTIN/EAN: 5906301811299
length
15 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
2.81 g
Magnetization Direction
↑ axial
Load capacity
3.20 kg / 31.43 N
Magnetic Induction
468.69 mT / 4687 Gs
Coating
[NiCuNi] Nickel
1.390 ZŁ with VAT / pcs + price for transport
1.130 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical data of the product - MPL 15x5x5 / N38 - lamellar magnet
Specification / characteristics - MPL 15x5x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020123 |
| GTIN/EAN | 5906301811299 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 2.81 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.20 kg / 31.43 N |
| Magnetic Induction ~ ? | 468.69 mT / 4687 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 product - technical parameters
Presented information constitute the direct effect of a physical simulation. Results rely on models for the class Nd2Fe14B. Actual performance may deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs distance) - interaction chart
MPL 15x5x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4682 Gs
468.2 mT
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
medium risk |
| 1 mm |
3410 Gs
341.0 mT
|
1.70 kg / 3.74 pounds
1697.3 g / 16.7 N
|
safe |
| 2 mm |
2394 Gs
239.4 mT
|
0.84 kg / 1.84 pounds
836.5 g / 8.2 N
|
safe |
| 3 mm |
1701 Gs
170.1 mT
|
0.42 kg / 0.93 pounds
422.6 g / 4.1 N
|
safe |
| 5 mm |
928 Gs
92.8 mT
|
0.13 kg / 0.28 pounds
125.8 g / 1.2 N
|
safe |
| 10 mm |
286 Gs
28.6 mT
|
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
|
safe |
| 15 mm |
119 Gs
11.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
safe |
| 20 mm |
59 Gs
5.9 mT
|
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
|
safe |
| 30 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Shear hold (vertical surface)
MPL 15x5x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
|
| 1 mm | Stal (~0.2) |
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.37 pounds
168.0 g / 1.6 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.19 pounds
84.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.06 pounds
26.0 g / 0.3 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 15x5x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.96 kg / 2.12 pounds
960.0 g / 9.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.64 kg / 1.41 pounds
640.0 g / 6.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 15x5x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.32 kg / 0.71 pounds
320.0 g / 3.1 N
|
| 1 mm |
|
0.80 kg / 1.76 pounds
800.0 g / 7.8 N
|
| 2 mm |
|
1.60 kg / 3.53 pounds
1600.0 g / 15.7 N
|
| 3 mm |
|
2.40 kg / 5.29 pounds
2400.0 g / 23.5 N
|
| 5 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 10 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 11 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
| 12 mm |
|
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
Table 5: Working in heat (material behavior) - thermal limit
MPL 15x5x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.20 kg / 7.05 pounds
3200.0 g / 31.4 N
|
OK |
| 40 °C | -2.2% |
3.13 kg / 6.90 pounds
3129.6 g / 30.7 N
|
OK |
| 60 °C | -4.4% |
3.06 kg / 6.74 pounds
3059.2 g / 30.0 N
|
|
| 80 °C | -6.6% |
2.99 kg / 6.59 pounds
2988.8 g / 29.3 N
|
|
| 100 °C | -28.8% |
2.28 kg / 5.02 pounds
2278.4 g / 22.4 N
|
Table 6: Two magnets (attraction) - field collision
MPL 15x5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
10.14 kg / 22.35 pounds
5 608 Gs
|
1.52 kg / 3.35 pounds
1520 g / 14.9 N
|
N/A |
| 1 mm |
7.53 kg / 16.60 pounds
8 071 Gs
|
1.13 kg / 2.49 pounds
1129 g / 11.1 N
|
6.78 kg / 14.94 pounds
~0 Gs
|
| 2 mm |
5.38 kg / 11.85 pounds
6 820 Gs
|
0.81 kg / 1.78 pounds
806 g / 7.9 N
|
4.84 kg / 10.67 pounds
~0 Gs
|
| 3 mm |
3.78 kg / 8.33 pounds
5 716 Gs
|
0.57 kg / 1.25 pounds
567 g / 5.6 N
|
3.40 kg / 7.49 pounds
~0 Gs
|
| 5 mm |
1.87 kg / 4.13 pounds
4 024 Gs
|
0.28 kg / 0.62 pounds
281 g / 2.8 N
|
1.68 kg / 3.71 pounds
~0 Gs
|
| 10 mm |
0.40 kg / 0.88 pounds
1 857 Gs
|
0.06 kg / 0.13 pounds
60 g / 0.6 N
|
0.36 kg / 0.79 pounds
~0 Gs
|
| 20 mm |
0.04 kg / 0.08 pounds
572 Gs
|
0.01 kg / 0.01 pounds
6 g / 0.1 N
|
0.03 kg / 0.08 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
67 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
41 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
27 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
19 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
14 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
10 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MPL 15x5x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (cracking risk) - collision effects
MPL 15x5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
34.11 km/h
(9.48 m/s)
|
0.13 J | |
| 30 mm |
58.95 km/h
(16.37 m/s)
|
0.38 J | |
| 50 mm |
76.10 km/h
(21.14 m/s)
|
0.63 J | |
| 100 mm |
107.62 km/h
(29.90 m/s)
|
1.26 J |
Table 9: Surface protection spec
MPL 15x5x5 / 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 (Pc)
MPL 15x5x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 366 Mx | 33.7 µWb |
| Pc Coefficient | 0.60 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 15x5x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.20 kg | Standard |
| Water (riverbed) |
3.66 kg
(+0.46 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet retains merely approx. 20-30% of its perpendicular strength.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely 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) = 0.60
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.
Material specification
| 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 proposals
Pros as well as cons of neodymium magnets.
Strengths
- They have unchanged lifting capacity, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
- They feature excellent resistance to magnetic field loss due to external magnetic sources,
- The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of precise creating and adjusting to complex requirements,
- Wide application in electronics industry – they are utilized in hard drives, electromotive mechanisms, medical devices, as well as technologically advanced constructions.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these products can complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is higher than average,
Holding force characteristics
Magnetic strength at its maximum – what it depends on?
- on a plate made of mild steel, optimally conducting the magnetic flux
- with a cross-section minimum 10 mm
- with an polished contact surface
- with zero gap (no coatings)
- for force applied at a right angle (in the magnet axis)
- at temperature room level
Practical aspects of lifting capacity – factors
- Gap (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
- Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
- Thermal factor – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Power loss in heat
Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
Precision electronics
Remember: neodymium magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and GPS.
No play value
Absolutely store magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.
Data carriers
Equipment safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).
Warning for allergy sufferers
A percentage of the population suffer from a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching can result in dermatitis. We strongly advise wear safety gloves.
Respect the power
Use magnets with awareness. Their huge power can surprise even professionals. Stay alert and do not underestimate their power.
Beware of splinters
Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.
Fire warning
Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.
Finger safety
Large magnets can crush fingers instantly. Never place your hand betwixt two strong magnets.
Medical interference
Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
