MPL 30x10x5 / N38 - lamellar magnet
lamellar magnet
Catalog no 020138
GTIN/EAN: 5906301811442
length
30 mm [±0,1 mm]
Width
10 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.25 g
Magnetization Direction
↑ axial
Load capacity
8.89 kg / 87.23 N
Magnetic Induction
329.52 mT / 3295 Gs
Coating
[NiCuNi] Nickel
4.26 ZŁ with VAT / pcs + price for transport
3.46 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
otherwise contact us by means of
contact form
through our site.
Force and shape of a neodymium magnet can be calculated using our
magnetic calculator.
Same-day shipping for orders placed before 14:00.
Detailed specification - MPL 30x10x5 / N38 - lamellar magnet
Specification / characteristics - MPL 30x10x5 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020138 |
| GTIN/EAN | 5906301811442 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 30 mm [±0,1 mm] |
| Width | 10 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 11.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 8.89 kg / 87.23 N |
| Magnetic Induction ~ ? | 329.52 mT / 3295 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 modeling of the magnet - report
These data constitute the direct effect of a mathematical calculation. Values rely on algorithms for the material Nd2Fe14B. Real-world performance might slightly differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs distance) - interaction chart
MPL 30x10x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3294 Gs
329.4 mT
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
warning |
| 1 mm |
2866 Gs
286.6 mT
|
6.73 kg / 14.84 LBS
6731.1 g / 66.0 N
|
warning |
| 2 mm |
2424 Gs
242.4 mT
|
4.82 kg / 10.62 LBS
4816.4 g / 47.2 N
|
warning |
| 3 mm |
2022 Gs
202.2 mT
|
3.35 kg / 7.38 LBS
3349.6 g / 32.9 N
|
warning |
| 5 mm |
1397 Gs
139.7 mT
|
1.60 kg / 3.53 LBS
1600.3 g / 15.7 N
|
weak grip |
| 10 mm |
615 Gs
61.5 mT
|
0.31 kg / 0.68 LBS
309.8 g / 3.0 N
|
weak grip |
| 15 mm |
314 Gs
31.4 mT
|
0.08 kg / 0.18 LBS
80.6 g / 0.8 N
|
weak grip |
| 20 mm |
177 Gs
17.7 mT
|
0.03 kg / 0.06 LBS
25.8 g / 0.3 N
|
weak grip |
| 30 mm |
70 Gs
7.0 mT
|
0.00 kg / 0.01 LBS
4.1 g / 0.0 N
|
weak grip |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
weak grip |
Table 2: Vertical force (vertical surface)
MPL 30x10x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.78 kg / 3.92 LBS
1778.0 g / 17.4 N
|
| 1 mm | Stal (~0.2) |
1.35 kg / 2.97 LBS
1346.0 g / 13.2 N
|
| 2 mm | Stal (~0.2) |
0.96 kg / 2.13 LBS
964.0 g / 9.5 N
|
| 3 mm | Stal (~0.2) |
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
|
| 5 mm | Stal (~0.2) |
0.32 kg / 0.71 LBS
320.0 g / 3.1 N
|
| 10 mm | Stal (~0.2) |
0.06 kg / 0.14 LBS
62.0 g / 0.6 N
|
| 15 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
16.0 g / 0.2 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 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: Wall mounting (sliding) - vertical pull
MPL 30x10x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.67 kg / 5.88 LBS
2667.0 g / 26.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.78 kg / 3.92 LBS
1778.0 g / 17.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.89 kg / 1.96 LBS
889.0 g / 8.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.45 kg / 9.80 LBS
4445.0 g / 43.6 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 30x10x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.89 kg / 1.96 LBS
889.0 g / 8.7 N
|
| 1 mm |
|
2.22 kg / 4.90 LBS
2222.5 g / 21.8 N
|
| 2 mm |
|
4.45 kg / 9.80 LBS
4445.0 g / 43.6 N
|
| 3 mm |
|
6.67 kg / 14.70 LBS
6667.5 g / 65.4 N
|
| 5 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 10 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 11 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
| 12 mm |
|
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MPL 30x10x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
8.89 kg / 19.60 LBS
8890.0 g / 87.2 N
|
OK |
| 40 °C | -2.2% |
8.69 kg / 19.17 LBS
8694.4 g / 85.3 N
|
OK |
| 60 °C | -4.4% |
8.50 kg / 18.74 LBS
8498.8 g / 83.4 N
|
|
| 80 °C | -6.6% |
8.30 kg / 18.31 LBS
8303.3 g / 81.5 N
|
|
| 100 °C | -28.8% |
6.33 kg / 13.95 LBS
6329.7 g / 62.1 N
|
Table 6: Two magnets (attraction) - field range
MPL 30x10x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
20.06 kg / 44.23 LBS
4 689 Gs
|
3.01 kg / 6.63 LBS
3010 g / 29.5 N
|
N/A |
| 1 mm |
17.63 kg / 38.86 LBS
6 174 Gs
|
2.64 kg / 5.83 LBS
2644 g / 25.9 N
|
15.86 kg / 34.98 LBS
~0 Gs
|
| 2 mm |
15.19 kg / 33.49 LBS
5 732 Gs
|
2.28 kg / 5.02 LBS
2279 g / 22.4 N
|
13.67 kg / 30.14 LBS
~0 Gs
|
| 3 mm |
12.92 kg / 28.47 LBS
5 285 Gs
|
1.94 kg / 4.27 LBS
1937 g / 19.0 N
|
11.62 kg / 25.63 LBS
~0 Gs
|
| 5 mm |
9.08 kg / 20.03 LBS
4 432 Gs
|
1.36 kg / 3.00 LBS
1363 g / 13.4 N
|
8.18 kg / 18.02 LBS
~0 Gs
|
| 10 mm |
3.61 kg / 7.96 LBS
2 795 Gs
|
0.54 kg / 1.19 LBS
542 g / 5.3 N
|
3.25 kg / 7.17 LBS
~0 Gs
|
| 20 mm |
0.70 kg / 1.54 LBS
1 230 Gs
|
0.10 kg / 0.23 LBS
105 g / 1.0 N
|
0.63 kg / 1.39 LBS
~0 Gs
|
| 50 mm |
0.02 kg / 0.05 LBS
217 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 LBS
141 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 / 0.01 LBS
96 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
68 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
50 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
38 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) - warnings
MPL 30x10x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 5.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MPL 30x10x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
28.96 km/h
(8.04 m/s)
|
0.36 J | |
| 30 mm |
49.12 km/h
(13.64 m/s)
|
1.05 J | |
| 50 mm |
63.39 km/h
(17.61 m/s)
|
1.74 J | |
| 100 mm |
89.65 km/h
(24.90 m/s)
|
3.49 J |
Table 9: Surface protection spec
MPL 30x10x5 / 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 30x10x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 9 370 Mx | 93.7 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 30x10x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 8.89 kg | Standard |
| Water (riverbed) |
10.18 kg
(+1.29 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Warning: On a vertical surface, the magnet holds only a fraction of its max power.
2. Plate thickness effect
*Thin steel (e.g. computer case) severely reduces the holding force.
3. Temperature resistance
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35
This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 |
See also products
Strengths and weaknesses of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
- They are extremely resistant to demagnetization induced by external disturbances,
- A magnet with a shiny silver surface looks better,
- Magnets are characterized by very high magnetic induction on the surface,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of accurate modeling and adjusting to individual needs,
- Huge importance in modern technologies – they are used in data components, brushless drives, diagnostic systems, and 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 secures the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in power. 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
- They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Additionally, small components of these devices can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Breakaway strength of the magnet in ideal conditions – what it depends on?
- using a plate made of mild steel, functioning as a circuit closing element
- whose transverse dimension equals approx. 10 mm
- characterized by smoothness
- under conditions of ideal adhesion (surface-to-surface)
- for force acting at a right angle (in the magnet axis)
- at temperature approx. 20 degrees Celsius
Lifting capacity in practice – influencing factors
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Metal 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.
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Plate texture – ground elements guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
- Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity was assessed using a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Threat to navigation
A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Maintain magnets close to a device to prevent damaging the sensors.
Power loss in heat
Do not overheat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).
Metal Allergy
A percentage of the population suffer from a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Extended handling might lead to dermatitis. It is best to wear protective gloves.
This is not a toy
Strictly keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are tragic.
Threat to electronics
Equipment safety: Strong magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
Mechanical processing
Drilling and cutting of NdFeB material carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Physical harm
Risk of injury: The attraction force is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.
Handling guide
Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Shattering risk
NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them cracking into small pieces.
Warning for heart patients
Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
