MPL 45x25x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020164
GTIN/EAN: 5906301811701
length
45 mm [±0,1 mm]
Width
25 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
84.38 g
Magnetization Direction
↑ axial
Load capacity
28.48 kg / 279.40 N
Magnetic Induction
306.29 mT / 3063 Gs
Coating
[NiCuNi] Nickel
35.01 ZŁ with VAT / pcs + price for transport
28.46 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - MPL 45x25x10 / N38 - lamellar magnet
Specification / characteristics - MPL 45x25x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020164 |
| GTIN/EAN | 5906301811701 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 45 mm [±0,1 mm] |
| Width | 25 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 84.38 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 28.48 kg / 279.40 N |
| Magnetic Induction ~ ? | 306.29 mT / 3063 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 - report
The following values represent the direct effect of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static force (pull vs distance) - characteristics
MPL 45x25x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3062 Gs
306.2 mT
|
28.48 kg / 62.79 LBS
28480.0 g / 279.4 N
|
dangerous! |
| 1 mm |
2918 Gs
291.8 mT
|
25.86 kg / 57.00 LBS
25856.7 g / 253.7 N
|
dangerous! |
| 2 mm |
2760 Gs
276.0 mT
|
23.13 kg / 51.00 LBS
23133.2 g / 226.9 N
|
dangerous! |
| 3 mm |
2595 Gs
259.5 mT
|
20.45 kg / 45.08 LBS
20449.5 g / 200.6 N
|
dangerous! |
| 5 mm |
2261 Gs
226.1 mT
|
15.53 kg / 34.23 LBS
15525.8 g / 152.3 N
|
dangerous! |
| 10 mm |
1529 Gs
152.9 mT
|
7.10 kg / 15.64 LBS
7096.1 g / 69.6 N
|
warning |
| 15 mm |
1018 Gs
101.8 mT
|
3.15 kg / 6.94 LBS
3147.4 g / 30.9 N
|
warning |
| 20 mm |
688 Gs
68.8 mT
|
1.44 kg / 3.17 LBS
1439.4 g / 14.1 N
|
safe |
| 30 mm |
340 Gs
34.0 mT
|
0.35 kg / 0.77 LBS
350.8 g / 3.4 N
|
safe |
| 50 mm |
111 Gs
11.1 mT
|
0.04 kg / 0.08 LBS
37.1 g / 0.4 N
|
safe |
Table 2: Shear capacity (wall)
MPL 45x25x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
5.70 kg / 12.56 LBS
5696.0 g / 55.9 N
|
| 1 mm | Stal (~0.2) |
5.17 kg / 11.40 LBS
5172.0 g / 50.7 N
|
| 2 mm | Stal (~0.2) |
4.63 kg / 10.20 LBS
4626.0 g / 45.4 N
|
| 3 mm | Stal (~0.2) |
4.09 kg / 9.02 LBS
4090.0 g / 40.1 N
|
| 5 mm | Stal (~0.2) |
3.11 kg / 6.85 LBS
3106.0 g / 30.5 N
|
| 10 mm | Stal (~0.2) |
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
|
| 15 mm | Stal (~0.2) |
0.63 kg / 1.39 LBS
630.0 g / 6.2 N
|
| 20 mm | Stal (~0.2) |
0.29 kg / 0.63 LBS
288.0 g / 2.8 N
|
| 30 mm | Stal (~0.2) |
0.07 kg / 0.15 LBS
70.0 g / 0.7 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 45x25x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
8.54 kg / 18.84 LBS
8544.0 g / 83.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
5.70 kg / 12.56 LBS
5696.0 g / 55.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
2.85 kg / 6.28 LBS
2848.0 g / 27.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
14.24 kg / 31.39 LBS
14240.0 g / 139.7 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 45x25x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.42 kg / 3.14 LBS
1424.0 g / 14.0 N
|
| 1 mm |
|
3.56 kg / 7.85 LBS
3560.0 g / 34.9 N
|
| 2 mm |
|
7.12 kg / 15.70 LBS
7120.0 g / 69.8 N
|
| 3 mm |
|
10.68 kg / 23.55 LBS
10680.0 g / 104.8 N
|
| 5 mm |
|
17.80 kg / 39.24 LBS
17800.0 g / 174.6 N
|
| 10 mm |
|
28.48 kg / 62.79 LBS
28480.0 g / 279.4 N
|
| 11 mm |
|
28.48 kg / 62.79 LBS
28480.0 g / 279.4 N
|
| 12 mm |
|
28.48 kg / 62.79 LBS
28480.0 g / 279.4 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 45x25x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
28.48 kg / 62.79 LBS
28480.0 g / 279.4 N
|
OK |
| 40 °C | -2.2% |
27.85 kg / 61.41 LBS
27853.4 g / 273.2 N
|
OK |
| 60 °C | -4.4% |
27.23 kg / 60.02 LBS
27226.9 g / 267.1 N
|
|
| 80 °C | -6.6% |
26.60 kg / 58.64 LBS
26600.3 g / 260.9 N
|
|
| 100 °C | -28.8% |
20.28 kg / 44.70 LBS
20277.8 g / 198.9 N
|
Table 6: Two magnets (attraction) - field range
MPL 45x25x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
65.04 kg / 143.40 LBS
4 590 Gs
|
9.76 kg / 21.51 LBS
9757 g / 95.7 N
|
N/A |
| 1 mm |
62.12 kg / 136.95 LBS
5 985 Gs
|
9.32 kg / 20.54 LBS
9318 g / 91.4 N
|
55.91 kg / 123.25 LBS
~0 Gs
|
| 2 mm |
59.05 kg / 130.19 LBS
5 836 Gs
|
8.86 kg / 19.53 LBS
8858 g / 86.9 N
|
53.15 kg / 117.17 LBS
~0 Gs
|
| 3 mm |
55.95 kg / 123.34 LBS
5 680 Gs
|
8.39 kg / 18.50 LBS
8392 g / 82.3 N
|
50.35 kg / 111.01 LBS
~0 Gs
|
| 5 mm |
49.74 kg / 109.66 LBS
5 356 Gs
|
7.46 kg / 16.45 LBS
7461 g / 73.2 N
|
44.77 kg / 98.70 LBS
~0 Gs
|
| 10 mm |
35.46 kg / 78.17 LBS
4 522 Gs
|
5.32 kg / 11.73 LBS
5319 g / 52.2 N
|
31.91 kg / 70.36 LBS
~0 Gs
|
| 20 mm |
16.21 kg / 35.73 LBS
3 057 Gs
|
2.43 kg / 5.36 LBS
2431 g / 23.8 N
|
14.59 kg / 32.16 LBS
~0 Gs
|
| 50 mm |
1.58 kg / 3.48 LBS
955 Gs
|
0.24 kg / 0.52 LBS
237 g / 2.3 N
|
1.42 kg / 3.14 LBS
~0 Gs
|
| 60 mm |
0.80 kg / 1.77 LBS
680 Gs
|
0.12 kg / 0.26 LBS
120 g / 1.2 N
|
0.72 kg / 1.59 LBS
~0 Gs
|
| 70 mm |
0.43 kg / 0.94 LBS
497 Gs
|
0.06 kg / 0.14 LBS
64 g / 0.6 N
|
0.38 kg / 0.85 LBS
~0 Gs
|
| 80 mm |
0.24 kg / 0.53 LBS
372 Gs
|
0.04 kg / 0.08 LBS
36 g / 0.4 N
|
0.22 kg / 0.47 LBS
~0 Gs
|
| 90 mm |
0.14 kg / 0.31 LBS
284 Gs
|
0.02 kg / 0.05 LBS
21 g / 0.2 N
|
0.13 kg / 0.28 LBS
~0 Gs
|
| 100 mm |
0.08 kg / 0.19 LBS
221 Gs
|
0.01 kg / 0.03 LBS
13 g / 0.1 N
|
0.08 kg / 0.17 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MPL 45x25x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 16.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 12.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 10.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 7.5 cm |
| Remote | 50 Gs (5.0 mT) | 7.0 cm |
| Payment card | 400 Gs (40.0 mT) | 3.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Collisions (kinetic energy) - warning
MPL 45x25x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.22 km/h
(5.89 m/s)
|
1.47 J | |
| 30 mm |
32.34 km/h
(8.98 m/s)
|
3.40 J | |
| 50 mm |
41.46 km/h
(11.52 m/s)
|
5.60 J | |
| 100 mm |
58.59 km/h
(16.28 m/s)
|
11.18 J |
Table 9: Corrosion resistance
MPL 45x25x10 / 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 45x25x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 35 829 Mx | 358.3 µWb |
| Pc Coefficient | 0.36 | Low (Flat) |
Table 11: Submerged application
MPL 45x25x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 28.48 kg | Standard |
| Water (riverbed) |
32.61 kg
(+4.13 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical surface, the magnet retains merely approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) drastically reduces 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) = 0.36
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.
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
Advantages and disadvantages of neodymium magnets.
Strengths
- They do not lose strength, even during around 10 years – the decrease in strength is only ~1% (according to tests),
- They are resistant to demagnetization induced by external magnetic fields,
- A magnet with a smooth gold surface has an effective appearance,
- Neodymium magnets ensure maximum magnetic induction on a small surface, which allows for strong attraction,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Possibility of exact shaping and modifying to precise requirements,
- Fundamental importance in modern technologies – they serve a role in magnetic memories, brushless drives, precision medical tools, as well as complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in creating nuts and complex shapes in magnets, we propose using a housing - magnetic mechanism.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, small components of these devices are able to disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum holding power of the magnet – what affects it?
- using a base made of mild steel, serving as a magnetic yoke
- whose transverse dimension reaches at least 10 mm
- characterized by even structure
- without the slightest clearance between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at conditions approx. 20°C
Lifting capacity in real conditions – factors
- Distance (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
- Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
- Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Precautions when working with neodymium magnets
Nickel allergy
Studies show that nickel (standard magnet coating) is a common allergen. If you have an allergy, avoid touching magnets with bare hands or select coated magnets.
Magnetic media
Device Safety: Strong magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).
Impact on smartphones
Navigation devices and mobile phones are extremely sensitive to magnetism. Close proximity with a strong magnet can permanently damage the internal compass in your phone.
ICD Warning
For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Physical harm
Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!
Keep away from children
These products are not toys. Accidental ingestion of multiple magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.
Power loss in heat
Do not overheat. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Dust is flammable
Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Immense force
Use magnets consciously. Their huge power can surprise even professionals. Be vigilant and respect their force.
Fragile material
Neodymium magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them cracking into shards.
