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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
1.130 zł net / pcs
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bulk discounts:
Need more?Frequently asked questions
How much will a block magnet really hold?
What is the maximum working temperature?
What safety factor should I allow?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Detailed specification - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 analysis of the product - technical parameters
These information constitute the outcome of a physical simulation. Values rely on models for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a preliminary roadmap for designers.
Table 1: Static force (force vs gap) - power drop
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 lbs
3200.0 g / 31.4 N
|
strong |
| 1 mm |
3410 Gs
341.0 mT
|
1.70 kg / 3.74 lbs
1697.3 g / 16.7 N
|
weak grip |
| 2 mm |
2394 Gs
239.4 mT
|
0.84 kg / 1.84 lbs
836.5 g / 8.2 N
|
weak grip |
| 3 mm |
1701 Gs
170.1 mT
|
0.42 kg / 0.93 lbs
422.6 g / 4.1 N
|
weak grip |
| 5 mm |
928 Gs
92.8 mT
|
0.13 kg / 0.28 lbs
125.8 g / 1.2 N
|
weak grip |
| 10 mm |
286 Gs
28.6 mT
|
0.01 kg / 0.03 lbs
11.9 g / 0.1 N
|
weak grip |
| 15 mm |
119 Gs
11.9 mT
|
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
weak grip |
| 20 mm |
59 Gs
5.9 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
weak grip |
| 30 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
weak grip |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical capacity (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 lbs
640.0 g / 6.3 N
|
| 1 mm | Stal (~0.2) |
0.34 kg / 0.75 lbs
340.0 g / 3.3 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.37 lbs
168.0 g / 1.6 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.06 lbs
26.0 g / 0.3 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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: 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 lbs
960.0 g / 9.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.64 kg / 1.41 lbs
640.0 g / 6.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.32 kg / 0.71 lbs
320.0 g / 3.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.60 kg / 3.53 lbs
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 lbs
320.0 g / 3.1 N
|
| 1 mm |
|
0.80 kg / 1.76 lbs
800.0 g / 7.8 N
|
| 2 mm |
|
1.60 kg / 3.53 lbs
1600.0 g / 15.7 N
|
| 3 mm |
|
2.40 kg / 5.29 lbs
2400.0 g / 23.5 N
|
| 5 mm |
|
3.20 kg / 7.05 lbs
3200.0 g / 31.4 N
|
| 10 mm |
|
3.20 kg / 7.05 lbs
3200.0 g / 31.4 N
|
| 11 mm |
|
3.20 kg / 7.05 lbs
3200.0 g / 31.4 N
|
| 12 mm |
|
3.20 kg / 7.05 lbs
3200.0 g / 31.4 N
|
Table 5: Working in heat (stability) - resistance threshold
MPL 15x5x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.20 kg / 7.05 lbs
3200.0 g / 31.4 N
|
OK |
| 40 °C | -2.2% |
3.13 kg / 6.90 lbs
3129.6 g / 30.7 N
|
OK |
| 60 °C | -4.4% |
3.06 kg / 6.74 lbs
3059.2 g / 30.0 N
|
|
| 80 °C | -6.6% |
2.99 kg / 6.59 lbs
2988.8 g / 29.3 N
|
|
| 100 °C | -28.8% |
2.28 kg / 5.02 lbs
2278.4 g / 22.4 N
|
Table 6: Two magnets (repulsion) - 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 lbs
5 608 Gs
|
1.52 kg / 3.35 lbs
1520 g / 14.9 N
|
N/A |
| 1 mm |
7.53 kg / 16.60 lbs
8 071 Gs
|
1.13 kg / 2.49 lbs
1129 g / 11.1 N
|
6.78 kg / 14.94 lbs
~0 Gs
|
| 2 mm |
5.38 kg / 11.85 lbs
6 820 Gs
|
0.81 kg / 1.78 lbs
806 g / 7.9 N
|
4.84 kg / 10.67 lbs
~0 Gs
|
| 3 mm |
3.78 kg / 8.33 lbs
5 716 Gs
|
0.57 kg / 1.25 lbs
567 g / 5.6 N
|
3.40 kg / 7.49 lbs
~0 Gs
|
| 5 mm |
1.87 kg / 4.13 lbs
4 024 Gs
|
0.28 kg / 0.62 lbs
281 g / 2.8 N
|
1.68 kg / 3.71 lbs
~0 Gs
|
| 10 mm |
0.40 kg / 0.88 lbs
1 857 Gs
|
0.06 kg / 0.13 lbs
60 g / 0.6 N
|
0.36 kg / 0.79 lbs
~0 Gs
|
| 20 mm |
0.04 kg / 0.08 lbs
572 Gs
|
0.01 kg / 0.01 lbs
6 g / 0.1 N
|
0.03 kg / 0.08 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
67 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
41 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
27 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
19 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
14 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
10 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
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 |
| 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: Collisions (kinetic energy) - warning
MPL 15x5x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.14 km/h
(5.87 m/s)
|
0.05 J | |
| 30 mm |
21.21 km/h
(5.89 m/s)
|
0.05 J | |
| 50 mm |
21.21 km/h
(5.89 m/s)
|
0.05 J | |
| 100 mm |
21.22 km/h
(5.89 m/s)
|
0.05 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: Construction data (Flux)
MPL 15x5x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 366 Mx | 33.7 µWb |
| Pc Coefficient | 0.60 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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
*Note: On a vertical surface, the magnet holds merely ~20% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*For N38 grade, the critical 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.
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 |
View also offers
Advantages and disadvantages of rare earth magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
- Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by magnetic disturbances,
- Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
- The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
- Thanks to flexibility in designing and the ability to customize to client solutions,
- Wide application in modern industrial fields – they find application in magnetic memories, electric drive systems, advanced medical instruments, as well as industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their force 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 stability even at temperatures up to 230°C
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- Due to limitations in producing nuts and complex forms in magnets, we propose using casing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- on a base made of mild steel, perfectly concentrating the magnetic field
- possessing a thickness of minimum 10 mm to avoid saturation
- with an ideally smooth contact surface
- under conditions of gap-free contact (surface-to-surface)
- for force acting at a right angle (in the magnet axis)
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
- Surface condition – ground elements guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- Thermal conditions – neodymium magnets 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 optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.
H&S for magnets
Handling guide
Handle with care. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.
Product not for children
NdFeB magnets are not intended for children. Accidental ingestion of multiple magnets may result in them attracting across intestines, which poses a critical condition and necessitates immediate surgery.
Heat sensitivity
Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and strength.
Dust is flammable
Dust produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Shattering risk
NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.
Finger safety
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
GPS Danger
Be aware: neodymium magnets generate a field that confuses sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.
Warning for allergy sufferers
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact and choose coated magnets.
Health Danger
Patients with a ICD should maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.
Data carriers
Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.
