MPL 15x2x30 / N38 - lamellar magnet
lamellar magnet
Catalog no 020121
GTIN/EAN: 5906301811275
length
15 mm [±0,1 mm]
Width
2 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
6.75 g
Magnetization Direction
→ diametrical
Load capacity
0.68 kg / 6.68 N
Magnetic Induction
614.34 mT / 6143 Gs
Coating
[NiCuNi] Nickel
4.75 ZŁ with VAT / pcs + price for transport
3.86 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MPL 15x2x30 / N38 - lamellar magnet
Specification / characteristics - MPL 15x2x30 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020121 |
| GTIN/EAN | 5906301811275 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 15 mm [±0,1 mm] |
| Width | 2 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 6.75 g |
| Magnetization Direction | → diametrical |
| Load capacity ~ ? | 0.68 kg / 6.68 N |
| Magnetic Induction ~ ? | 614.34 mT / 6143 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 analysis of the product - report
Presented information are the outcome of a engineering calculation. Values are based on models for the material Nd2Fe14B. Operational parameters may differ from theoretical values. Please consider these data as a reference point for designers.
Table 1: Static pull force (pull vs distance) - interaction chart
MPL 15x2x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6128 Gs
612.8 mT
|
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
low risk |
| 1 mm |
3036 Gs
303.6 mT
|
0.17 kg / 0.37 lbs
166.8 g / 1.6 N
|
low risk |
| 2 mm |
1736 Gs
173.6 mT
|
0.05 kg / 0.12 lbs
54.5 g / 0.5 N
|
low risk |
| 3 mm |
1150 Gs
115.0 mT
|
0.02 kg / 0.05 lbs
23.9 g / 0.2 N
|
low risk |
| 5 mm |
623 Gs
62.3 mT
|
0.01 kg / 0.02 lbs
7.0 g / 0.1 N
|
low risk |
| 10 mm |
218 Gs
21.8 mT
|
0.00 kg / 0.00 lbs
0.9 g / 0.0 N
|
low risk |
| 15 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
low risk |
| 20 mm |
58 Gs
5.8 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
low risk |
| 30 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding hold (wall)
MPL 15x2x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.30 lbs
136.0 g / 1.3 N
|
| 1 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
34.0 g / 0.3 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
10.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
0.0 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) - behavior on slippery surfaces
MPL 15x2x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.20 kg / 0.45 lbs
204.0 g / 2.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.30 lbs
136.0 g / 1.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 lbs
68.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.34 kg / 0.75 lbs
340.0 g / 3.3 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MPL 15x2x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 lbs
68.0 g / 0.7 N
|
| 1 mm |
|
0.17 kg / 0.37 lbs
170.0 g / 1.7 N
|
| 2 mm |
|
0.34 kg / 0.75 lbs
340.0 g / 3.3 N
|
| 3 mm |
|
0.51 kg / 1.12 lbs
510.0 g / 5.0 N
|
| 5 mm |
|
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
| 10 mm |
|
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
| 11 mm |
|
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
| 12 mm |
|
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
Table 5: Thermal resistance (stability) - power drop
MPL 15x2x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.68 kg / 1.50 lbs
680.0 g / 6.7 N
|
OK |
| 40 °C | -2.2% |
0.67 kg / 1.47 lbs
665.0 g / 6.5 N
|
OK |
| 60 °C | -4.4% |
0.65 kg / 1.43 lbs
650.1 g / 6.4 N
|
OK |
| 80 °C | -6.6% |
0.64 kg / 1.40 lbs
635.1 g / 6.2 N
|
|
| 100 °C | -28.8% |
0.48 kg / 1.07 lbs
484.2 g / 4.7 N
|
Table 6: Two magnets (repulsion) - field range
MPL 15x2x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
6.95 kg / 15.31 lbs
6 152 Gs
|
1.04 kg / 2.30 lbs
1042 g / 10.2 N
|
N/A |
| 1 mm |
3.45 kg / 7.62 lbs
8 643 Gs
|
0.52 kg / 1.14 lbs
518 g / 5.1 N
|
3.11 kg / 6.85 lbs
~0 Gs
|
| 2 mm |
1.70 kg / 3.76 lbs
6 071 Gs
|
0.26 kg / 0.56 lbs
256 g / 2.5 N
|
1.53 kg / 3.38 lbs
~0 Gs
|
| 3 mm |
0.93 kg / 2.05 lbs
4 482 Gs
|
0.14 kg / 0.31 lbs
139 g / 1.4 N
|
0.84 kg / 1.84 lbs
~0 Gs
|
| 5 mm |
0.36 kg / 0.79 lbs
2 788 Gs
|
0.05 kg / 0.12 lbs
54 g / 0.5 N
|
0.32 kg / 0.71 lbs
~0 Gs
|
| 10 mm |
0.07 kg / 0.16 lbs
1 247 Gs
|
0.01 kg / 0.02 lbs
11 g / 0.1 N
|
0.06 kg / 0.14 lbs
~0 Gs
|
| 20 mm |
0.01 kg / 0.02 lbs
435 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
71 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
47 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
33 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
24 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
18 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
14 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) - warnings
MPL 15x2x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 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: Dynamics (kinetic energy) - collision effects
MPL 15x2x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
10.13 km/h
(2.81 m/s)
|
0.03 J | |
| 30 mm |
17.53 km/h
(4.87 m/s)
|
0.08 J | |
| 50 mm |
22.63 km/h
(6.29 m/s)
|
0.13 J | |
| 100 mm |
32.01 km/h
(8.89 m/s)
|
0.27 J |
Table 9: Coating parameters (durability)
MPL 15x2x30 / 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 15x2x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 210 Mx | 22.1 µWb |
| Pc Coefficient | 1.54 | High (Stable) |
Table 11: Submerged application
MPL 15x2x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.68 kg | Standard |
| Water (riverbed) |
0.78 kg
(+0.10 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet holds merely approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) significantly weakens the holding force.
3. Power loss vs temp
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.54
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% |
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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Pros as well as cons of rare earth magnets.
Pros
- They retain attractive force for nearly 10 years – the drop is just ~1% (according to analyses),
- Magnets very well resist against loss of magnetization caused by foreign field sources,
- In other words, due to the shiny finish of gold, the element is aesthetically pleasing,
- Magnets have huge magnetic induction on the active area,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- In view of the potential of free molding and adaptation to custom needs, magnetic components can be manufactured in a wide range of geometric configurations, which amplifies use scope,
- Significant place in modern technologies – they are utilized in HDD drives, brushless drives, diagnostic systems, and industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in small systems
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex forms.
- Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these devices are able to complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum lifting capacity of the magnet – what contributes to it?
- using a base made of mild steel, functioning as a magnetic yoke
- whose transverse dimension is min. 10 mm
- with a plane cleaned and smooth
- with total lack of distance (without paint)
- during detachment in a direction perpendicular to the mounting surface
- at ambient temperature room level
Lifting capacity in practice – influencing factors
- Distance (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
- Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.
H&S for magnets
Thermal limits
Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.
Nickel coating and allergies
Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.
ICD Warning
People with a ICD should maintain an absolute distance from magnets. The magnetism can disrupt the functioning of the life-saving device.
Swallowing risk
Adult use only. Small elements pose a choking risk, leading to severe trauma. Store away from children and animals.
Do not drill into magnets
Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Safe distance
Equipment safety: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).
Compass and GPS
A strong magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to avoid damaging the sensors.
Risk of cracking
Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Powerful field
Exercise caution. Rare earth magnets attract from a distance and snap with huge force, often faster than you can move away.
Crushing force
Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
