MPL 5x5x1 / N38 - lamellar magnet
lamellar magnet
Catalog no 020170
GTIN/EAN: 5906301811763
length
5 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.19 g
Magnetization Direction
↑ axial
Load capacity
0.34 kg / 3.30 N
Magnetic Induction
209.53 mT / 2095 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MPL 5x5x1 / N38 - lamellar magnet
Specification / characteristics - MPL 5x5x1 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020170 |
| GTIN/EAN | 5906301811763 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 5 mm [±0,1 mm] |
| Width | 5 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.19 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.34 kg / 3.30 N |
| Magnetic Induction ~ ? | 209.53 mT / 2095 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 - data
The following data constitute the result of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these data as a reference point for designers.
Table 1: Static force (pull vs distance) - characteristics
MPL 5x5x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2094 Gs
209.4 mT
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
weak grip |
| 1 mm |
1514 Gs
151.4 mT
|
0.18 kg / 0.39 pounds
177.8 g / 1.7 N
|
weak grip |
| 2 mm |
922 Gs
92.2 mT
|
0.07 kg / 0.15 pounds
65.9 g / 0.6 N
|
weak grip |
| 3 mm |
543 Gs
54.3 mT
|
0.02 kg / 0.05 pounds
22.9 g / 0.2 N
|
weak grip |
| 5 mm |
209 Gs
20.9 mT
|
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
|
weak grip |
| 10 mm |
38 Gs
3.8 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 15 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Vertical hold (vertical surface)
MPL 5x5x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.07 kg / 0.15 pounds
68.0 g / 0.7 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
36.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 5x5x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.10 kg / 0.22 pounds
102.0 g / 1.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.07 kg / 0.15 pounds
68.0 g / 0.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.03 kg / 0.07 pounds
34.0 g / 0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.17 kg / 0.37 pounds
170.0 g / 1.7 N
|
Table 4: Steel thickness (substrate influence) - power losses
MPL 5x5x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 0.07 pounds
34.0 g / 0.3 N
|
| 1 mm |
|
0.09 kg / 0.19 pounds
85.0 g / 0.8 N
|
| 2 mm |
|
0.17 kg / 0.37 pounds
170.0 g / 1.7 N
|
| 3 mm |
|
0.26 kg / 0.56 pounds
255.0 g / 2.5 N
|
| 5 mm |
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 10 mm |
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 11 mm |
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
| 12 mm |
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
Table 5: Working in heat (stability) - thermal limit
MPL 5x5x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
OK |
| 40 °C | -2.2% |
0.33 kg / 0.73 pounds
332.5 g / 3.3 N
|
OK |
| 60 °C | -4.4% |
0.33 kg / 0.72 pounds
325.0 g / 3.2 N
|
|
| 80 °C | -6.6% |
0.32 kg / 0.70 pounds
317.6 g / 3.1 N
|
|
| 100 °C | -28.8% |
0.24 kg / 0.53 pounds
242.1 g / 2.4 N
|
Table 6: Two magnets (attraction) - field collision
MPL 5x5x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.68 kg / 1.49 pounds
3 601 Gs
|
0.10 kg / 0.22 pounds
101 g / 1.0 N
|
N/A |
| 1 mm |
0.52 kg / 1.15 pounds
3 682 Gs
|
0.08 kg / 0.17 pounds
78 g / 0.8 N
|
0.47 kg / 1.04 pounds
~0 Gs
|
| 2 mm |
0.35 kg / 0.78 pounds
3 028 Gs
|
0.05 kg / 0.12 pounds
53 g / 0.5 N
|
0.32 kg / 0.70 pounds
~0 Gs
|
| 3 mm |
0.22 kg / 0.48 pounds
2 388 Gs
|
0.03 kg / 0.07 pounds
33 g / 0.3 N
|
0.20 kg / 0.44 pounds
~0 Gs
|
| 5 mm |
0.08 kg / 0.17 pounds
1 413 Gs
|
0.01 kg / 0.03 pounds
12 g / 0.1 N
|
0.07 kg / 0.15 pounds
~0 Gs
|
| 10 mm |
0.01 kg / 0.01 pounds
417 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
77 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
6 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
MPL 5x5x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Car key | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Impact energy (cracking risk) - warning
MPL 5x5x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
42.67 km/h
(11.85 m/s)
|
0.01 J | |
| 30 mm |
73.89 km/h
(20.53 m/s)
|
0.04 J | |
| 50 mm |
95.40 km/h
(26.50 m/s)
|
0.07 J | |
| 100 mm |
134.91 km/h
(37.48 m/s)
|
0.13 J |
Table 9: Coating parameters (durability)
MPL 5x5x1 / 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 5x5x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 615 Mx | 6.2 µWb |
| Pc Coefficient | 0.26 | Low (Flat) |
Table 11: Physics of underwater searching
MPL 5x5x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.34 kg | Standard |
| Water (riverbed) |
0.39 kg
(+0.05 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin steel (e.g. computer case) drastically weakens the holding force.
3. Heat tolerance
*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) = 0.26
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% |
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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Strengths and weaknesses of Nd2Fe14B magnets.
Benefits
- Their magnetic field remains stable, and after around ten years it drops only by ~1% (according to research),
- Magnets very well protect themselves against demagnetization caused by foreign field sources,
- A magnet with a metallic gold surface is more attractive,
- Magnetic induction on the working part of the magnet turns out to be extremely intense,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to modularity in shaping and the ability to customize to individual projects,
- Wide application in innovative solutions – they find application in magnetic memories, drive modules, precision medical tools, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in miniature devices
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- Neodymium magnets lose their strength 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- We suggest a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these devices can complicate diagnosis medical in case of swallowing.
- With large orders the cost of neodymium magnets is economically unviable,
Pull force analysis
Highest magnetic holding force – what it depends on?
- on a plate made of mild steel, effectively closing the magnetic flux
- with a thickness of at least 10 mm
- with a plane cleaned and smooth
- with total lack of distance (without paint)
- during pulling in a direction perpendicular to the plane
- at ambient temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Direction of force – highest force is available only during perpendicular pulling. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
Safety rules for work with neodymium magnets
Magnets are brittle
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, immediately stop working with magnets and wear gloves.
Immense force
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Do not give to children
These products are not toys. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.
Electronic hazard
Avoid bringing magnets near a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Phone sensors
GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.
Medical interference
Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.
Do not overheat magnets
Avoid heat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).
Combustion hazard
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Hand protection
Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
