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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Technical data - 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 |
Engineering modeling of the product - data
These information represent the result of a engineering simulation. Results are based on models for the class Nd2Fe14B. Actual conditions may differ. Please consider these data as a reference point when designing systems.
Table 1: Static pull force (pull vs gap) - 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
|
medium risk |
| 15 mm |
1018 Gs
101.8 mT
|
3.15 kg / 6.94 LBS
3147.4 g / 30.9 N
|
medium risk |
| 20 mm |
688 Gs
68.8 mT
|
1.44 kg / 3.17 LBS
1439.4 g / 14.1 N
|
weak grip |
| 30 mm |
340 Gs
34.0 mT
|
0.35 kg / 0.77 LBS
350.8 g / 3.4 N
|
weak grip |
| 50 mm |
111 Gs
11.1 mT
|
0.04 kg / 0.08 LBS
37.1 g / 0.4 N
|
weak grip |
Table 2: Shear capacity (vertical surface)
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: Vertical assembly (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: Material efficiency (saturation) - sheet metal selection
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: Thermal stability (material behavior) - thermal limit
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) - forces in the system
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 (implants) - 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 |
| Mechanical watch | 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 (cracking risk) - collision effects
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: Anti-corrosion coating durability
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: Electrical 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: Underwater work (magnet fishing)
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. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds merely a fraction of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Power loss vs temp
*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
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 |
Other offers
Strengths as well as weaknesses of neodymium magnets.
Advantages
- Their magnetic field remains stable, and after around 10 years it decreases only by ~1% (according to research),
- They are noted for resistance to demagnetization induced by external field influence,
- By using a decorative coating of silver, the element has an aesthetic look,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to modularity in constructing and the capacity to adapt to specific needs,
- Fundamental importance in modern technologies – they are commonly used in data components, electric motors, precision medical tools, as well as technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- At 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 lose their power 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 durability even at temperatures up to 230°C
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of making threads in the magnet and complicated forms - preferred is a housing - magnetic holder.
- Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small components of these products can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what it depends on?
- with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- with a cross-section minimum 10 mm
- characterized by lack of roughness
- with total lack of distance (no coatings)
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Lifting capacity in practice – influencing factors
- Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Angle of force application – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Steel grade – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
- Plate texture – ground elements ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Temperature influence – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.
Precautions when working with neodymium magnets
Adults only
Strictly keep magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are fatal.
Protect data
Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Crushing risk
Big blocks can crush fingers instantly. Do not place your hand betwixt two strong magnets.
Handling guide
Before starting, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Allergic reactions
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.
Shattering risk
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Heat warning
Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).
GPS Danger
Navigation devices and mobile phones are extremely sensitive to magnetism. Close proximity with a strong magnet can decalibrate the sensors in your phone.
ICD Warning
For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.
Flammability
Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
