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 / 31.38 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 details - 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 / 31.38 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 |
Physical simulation of the magnet - report
These data are the direct effect of a engineering analysis. Results rely on models for the class Nd2Fe14B. Actual performance might slightly differ from theoretical values. Treat these calculations as a supplementary guide for designers.
Table 1: Static pull force (pull vs distance) - characteristics
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
|
strong |
| 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 capacity (wall)
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 (shearing) - vertical pull
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: Steel thickness (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: Thermal stability (material behavior) - power drop
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) - forces in the system
MPL 15x5x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Hazards (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 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: Coating parameters (durability)
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: Hydrostatics and buoyancy
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. Vertical hold
*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Thermal stability
*For standard magnets, the max working temp 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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also products
Advantages and disadvantages of rare earth magnets.
Strengths
- They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
- They retain their magnetic properties even under strong external field,
- A magnet with a smooth silver surface looks better,
- Neodymium magnets ensure maximum magnetic induction on a their surface, 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 shape) at temperatures up to 230°C and above...
- Thanks to flexibility in designing and the ability to adapt to client solutions,
- Universal use in electronics industry – they are used in computer drives, brushless drives, medical devices, as well as multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic mount.
- Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Furthermore, small elements of these products can disrupt the diagnostic process medical when they are in the body.
- Due to neodymium price, their price is higher than average,
Pull force analysis
Best holding force of the magnet in ideal parameters – what it depends on?
- on a plate made of mild steel, effectively closing the magnetic field
- with a thickness of at least 10 mm
- characterized by smoothness
- with total lack of distance (no coatings)
- during detachment in a direction perpendicular to the plane
- at temperature approx. 20 degrees Celsius
What influences lifting capacity in practice
- Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
- Base massiveness – too thin sheet causes magnetic saturation, causing part of the power to be lost to the other side.
- Steel type – mild steel gives the best results. Alloy steels reduce magnetic properties 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 – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the load capacity.
Safe handling of neodymium magnets
Maximum temperature
Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).
Phone sensors
Be aware: rare earth magnets generate a field that disrupts precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.
Electronic hazard
Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Fragile material
Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.
Implant safety
Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.
Powerful field
Handle with care. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.
This is not a toy
Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a severe health hazard and requires immediate surgery.
Hand protection
Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.
Fire risk
Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Allergic reactions
Some people have a sensitization to Ni, which is the typical protective layer for neodymium magnets. Extended handling can result in dermatitis. It is best to wear protective gloves.
