MPL 3x3x3 / N38 - lamellar magnet
lamellar magnet
Catalog no 020148
GTIN/EAN: 5906301811541
length
3 mm [±0,1 mm]
Width
3 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
0.2 g
Magnetization Direction
↑ axial
Load capacity
0.34 kg / 3.37 N
Magnetic Induction
538.48 mT / 5385 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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Detailed specification - MPL 3x3x3 / N38 - lamellar magnet
Specification / characteristics - MPL 3x3x3 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020148 |
| GTIN/EAN | 5906301811541 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 3 mm [±0,1 mm] |
| Width | 3 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 0.2 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.34 kg / 3.37 N |
| Magnetic Induction ~ ? | 538.48 mT / 5385 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 product - technical parameters
Presented data are the result of a physical calculation. Results were calculated on algorithms for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these data as a reference point during assembly planning.
Table 1: Static pull force (pull vs distance) - characteristics
MPL 3x3x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5372 Gs
537.2 mT
|
0.34 kg / 0.75 pounds
340.0 g / 3.3 N
|
weak grip |
| 1 mm |
2530 Gs
253.0 mT
|
0.08 kg / 0.17 pounds
75.4 g / 0.7 N
|
weak grip |
| 2 mm |
1127 Gs
112.7 mT
|
0.01 kg / 0.03 pounds
15.0 g / 0.1 N
|
weak grip |
| 3 mm |
562 Gs
56.2 mT
|
0.00 kg / 0.01 pounds
3.7 g / 0.0 N
|
weak grip |
| 5 mm |
192 Gs
19.2 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
weak grip |
| 10 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 15 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 20 mm |
5 Gs
0.5 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: Sliding hold (vertical surface)
MPL 3x3x3 / 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) |
0.02 kg / 0.04 pounds
16.0 g / 0.2 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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: Wall mounting (shearing) - behavior on slippery surfaces
MPL 3x3x3 / 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: Material efficiency (substrate influence) - power losses
MPL 3x3x3 / 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: Thermal resistance (material behavior) - power drop
MPL 3x3x3 / 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
|
OK |
| 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 range
MPL 3x3x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.60 kg / 3.53 pounds
5 931 Gs
|
0.24 kg / 0.53 pounds
240 g / 2.4 N
|
N/A |
| 1 mm |
0.80 kg / 1.77 pounds
7 610 Gs
|
0.12 kg / 0.27 pounds
120 g / 1.2 N
|
0.72 kg / 1.59 pounds
~0 Gs
|
| 2 mm |
0.36 kg / 0.78 pounds
5 061 Gs
|
0.05 kg / 0.12 pounds
53 g / 0.5 N
|
0.32 kg / 0.70 pounds
~0 Gs
|
| 3 mm |
0.15 kg / 0.34 pounds
3 343 Gs
|
0.02 kg / 0.05 pounds
23 g / 0.2 N
|
0.14 kg / 0.31 pounds
~0 Gs
|
| 5 mm |
0.03 kg / 0.08 pounds
1 568 Gs
|
0.01 kg / 0.01 pounds
5 g / 0.1 N
|
0.03 kg / 0.07 pounds
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 pounds
384 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
70 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: Protective zones (electronics) - warnings
MPL 3x3x3 / 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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.0 cm |
| Remote | 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) - collision effects
MPL 3x3x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
41.58 km/h
(11.55 m/s)
|
0.01 J | |
| 30 mm |
72.02 km/h
(20.01 m/s)
|
0.04 J | |
| 50 mm |
92.98 km/h
(25.83 m/s)
|
0.07 J | |
| 100 mm |
131.49 km/h
(36.53 m/s)
|
0.13 J |
Table 9: Surface protection spec
MPL 3x3x3 / 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 (Pc)
MPL 3x3x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 495 Mx | 5.0 µWb |
| Pc Coefficient | 0.84 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MPL 3x3x3 / 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. Vertical hold
*Note: On a vertical surface, the magnet holds just approx. 20-30% of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) severely reduces the holding force.
3. Power loss vs temp
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.84
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 |
Other deals
Pros as well as cons of rare earth magnets.
Benefits
- Their strength is durable, and after around ten years it drops only by ~1% (according to research),
- They maintain their magnetic properties even under external field action,
- A magnet with a metallic silver surface is more attractive,
- The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Considering the potential of flexible molding and adaptation to individualized needs, magnetic components can be manufactured in a broad palette of geometric configurations, which expands the range of possible applications,
- Key role in modern technologies – they serve a role in data components, brushless drives, precision medical tools, also complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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
- Due to limitations in realizing threads and complex shapes in magnets, we propose using cover - magnetic mount.
- Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Additionally, small components of these products are able to complicate diagnosis medical in case of swallowing.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Detachment force of the magnet in optimal conditions – what affects it?
- using a base made of low-carbon steel, acting as a magnetic yoke
- whose thickness is min. 10 mm
- with an ideally smooth contact surface
- under conditions of ideal adhesion (metal-to-metal)
- under perpendicular force direction (90-degree angle)
- at conditions approx. 20°C
Lifting capacity in real conditions – factors
- Distance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
- Steel type – low-carbon steel gives the best results. Alloy steels decrease magnetic permeability and holding force.
- Surface quality – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
H&S for magnets
Finger safety
Large magnets can crush fingers in a fraction of a second. Do not place your hand between two strong magnets.
Mechanical processing
Fire warning: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.
Demagnetization risk
Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. Damage is permanent.
Allergic reactions
A percentage of the population experience a sensitization to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause an allergic reaction. We suggest wear safety gloves.
GPS Danger
A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets near a smartphone to prevent breaking the sensors.
Threat to electronics
Do not bring magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Powerful field
Be careful. Neodymium magnets attract from a long distance and snap with massive power, often quicker than you can move away.
Shattering risk
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
This is not a toy
NdFeB magnets are not suitable for play. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.
Medical interference
For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.
