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MPL 17x17x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020124

GTIN/EAN: 5906301811305

5.00

length

17 mm [±0,1 mm]

Width

17 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.5 g

Magnetization Direction

↑ axial

Load capacity

3.22 kg / 31.54 N

Magnetic Induction

187.48 mT / 1875 Gs

Coating

[NiCuNi] Nickel

4.71 with VAT / pcs + price for transport

3.83 ZŁ net + 23% VAT / pcs

bulk discounts:

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Technical specification - MPL 17x17x3 / N38 - lamellar magnet

Specification / characteristics - MPL 17x17x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020124
GTIN/EAN 5906301811305
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 17 mm [±0,1 mm]
Width 17 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 6.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 3.22 kg / 31.54 N
Magnetic Induction ~ ? 187.48 mT / 1875 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 17x17x3 / N38 - lamellar magnet
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

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

The following values represent the outcome of a mathematical analysis. Values were calculated on models for the material Nd2Fe14B. Operational parameters may deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MPL 17x17x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1874 Gs
187.4 mT
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
strong
1 mm 1761 Gs
176.1 mT
2.84 kg / 6.27 lbs
2842.9 g / 27.9 N
strong
2 mm 1610 Gs
161.0 mT
2.38 kg / 5.24 lbs
2376.8 g / 23.3 N
strong
3 mm 1440 Gs
144.0 mT
1.90 kg / 4.19 lbs
1901.0 g / 18.6 N
weak grip
5 mm 1099 Gs
109.9 mT
1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
weak grip
10 mm 508 Gs
50.8 mT
0.24 kg / 0.52 lbs
236.4 g / 2.3 N
weak grip
15 mm 245 Gs
24.5 mT
0.06 kg / 0.12 lbs
55.2 g / 0.5 N
weak grip
20 mm 131 Gs
13.1 mT
0.02 kg / 0.03 lbs
15.7 g / 0.2 N
weak grip
30 mm 48 Gs
4.8 mT
0.00 kg / 0.00 lbs
2.1 g / 0.0 N
weak grip
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip

Table 2: Vertical force (vertical surface)
MPL 17x17x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.64 kg / 1.42 lbs
644.0 g / 6.3 N
1 mm Stal (~0.2) 0.57 kg / 1.25 lbs
568.0 g / 5.6 N
2 mm Stal (~0.2) 0.48 kg / 1.05 lbs
476.0 g / 4.7 N
3 mm Stal (~0.2) 0.38 kg / 0.84 lbs
380.0 g / 3.7 N
5 mm Stal (~0.2) 0.22 kg / 0.49 lbs
222.0 g / 2.2 N
10 mm Stal (~0.2) 0.05 kg / 0.11 lbs
48.0 g / 0.5 N
15 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 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: Vertical assembly (shearing) - vertical pull
MPL 17x17x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.97 kg / 2.13 lbs
966.0 g / 9.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.64 kg / 1.42 lbs
644.0 g / 6.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N

Table 4: Material efficiency (saturation) - power losses
MPL 17x17x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.32 kg / 0.71 lbs
322.0 g / 3.2 N
1 mm
25%
0.81 kg / 1.77 lbs
805.0 g / 7.9 N
2 mm
50%
1.61 kg / 3.55 lbs
1610.0 g / 15.8 N
3 mm
75%
2.42 kg / 5.32 lbs
2415.0 g / 23.7 N
5 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
10 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
11 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
12 mm
100%
3.22 kg / 7.10 lbs
3220.0 g / 31.6 N

Table 5: Working in heat (stability) - resistance threshold
MPL 17x17x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 3.22 kg / 7.10 lbs
3220.0 g / 31.6 N
OK
40 °C -2.2% 3.15 kg / 6.94 lbs
3149.2 g / 30.9 N
OK
60 °C -4.4% 3.08 kg / 6.79 lbs
3078.3 g / 30.2 N
80 °C -6.6% 3.01 kg / 6.63 lbs
3007.5 g / 29.5 N
100 °C -28.8% 2.29 kg / 5.05 lbs
2292.6 g / 22.5 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MPL 17x17x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 6.26 kg / 13.80 lbs
3 313 Gs
0.94 kg / 2.07 lbs
939 g / 9.2 N
N/A
1 mm 5.93 kg / 13.07 lbs
3 648 Gs
0.89 kg / 1.96 lbs
889 g / 8.7 N
5.33 kg / 11.76 lbs
~0 Gs
2 mm 5.53 kg / 12.19 lbs
3 523 Gs
0.83 kg / 1.83 lbs
829 g / 8.1 N
4.97 kg / 10.97 lbs
~0 Gs
3 mm 5.08 kg / 11.21 lbs
3 379 Gs
0.76 kg / 1.68 lbs
763 g / 7.5 N
4.58 kg / 10.09 lbs
~0 Gs
5 mm 4.15 kg / 9.16 lbs
3 053 Gs
0.62 kg / 1.37 lbs
623 g / 6.1 N
3.74 kg / 8.24 lbs
~0 Gs
10 mm 2.15 kg / 4.75 lbs
2 199 Gs
0.32 kg / 0.71 lbs
323 g / 3.2 N
1.94 kg / 4.27 lbs
~0 Gs
20 mm 0.46 kg / 1.01 lbs
1 016 Gs
0.07 kg / 0.15 lbs
69 g / 0.7 N
0.41 kg / 0.91 lbs
~0 Gs
50 mm 0.01 kg / 0.02 lbs
153 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
0.01 kg / 0.02 lbs
~0 Gs
60 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
70 mm 0.00 kg / 0.00 lbs
64 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
44 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
32 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
24 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) - precautionary measures
MPL 17x17x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Mobile device 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Impact energy (kinetic energy) - warning
MPL 17x17x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.45 km/h
(6.52 m/s)
0.14 J
30 mm 38.89 km/h
(10.80 m/s)
0.38 J
50 mm 50.19 km/h
(13.94 m/s)
0.63 J
100 mm 70.98 km/h
(19.72 m/s)
1.26 J

Table 9: Corrosion resistance
MPL 17x17x3 / 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 17x17x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 509 Mx 65.1 µWb
Pc Coefficient 0.23 Low (Flat)

Table 11: Underwater work (magnet fishing)
MPL 17x17x3 / N38

Environment Effective steel pull Effect
Air (land) 3.22 kg Standard
Water (riverbed) 3.69 kg
(+0.47 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Power loss vs temp

*For N38 material, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.23

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.

Technical specification and ecology
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
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 020124-2026
Measurement Calculator
Pulling force

Magnetic Field

Other offers

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 17x17x3 mm and a weight of 6.5 g, guarantees the highest quality connection. This rectangular block with a force of 31.54 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating strong flat magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. To separate the MPL 17x17x3 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend extreme caution, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 17x17x3 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 17x17x3 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
Standardly, the MPL 17x17x3 / N38 model is magnetized axially (dimension 3 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 17x17x3 mm, which, at a weight of 6.5 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 17x17x3 mm and a self-weight of 6.5 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of rare earth magnets.

Advantages

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • Their magnetic field is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
  • Neodymium magnets are exceptionally resistant to demagnetization caused by external interference,
  • A magnet with a smooth gold surface has an effective appearance,
  • Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
  • 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 versatility in shaping and the ability to modify to unusual requirements,
  • Huge importance in modern industrial fields – they serve a role in data components, electromotive mechanisms, medical equipment, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in small systems

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The force parameter is a measurement result performed under specific, ideal conditions:
  • using a sheet made of low-carbon steel, functioning as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • under conditions of no distance (surface-to-surface)
  • under vertical application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Practical lifting capacity: influencing factors

Effective lifting capacity is affected by specific conditions, including (from most important):
  • Distance (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
  • Thermal factor – high temperature reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safe handling of NdFeB magnets
Danger to the youngest

Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.

Power loss in heat

Keep cool. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

ICD Warning

Individuals with a ICD must keep an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Dust is flammable

Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Safe operation

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Fragile material

NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.

Compass and GPS

An intense magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to prevent damaging the sensors.

Electronic hazard

Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.

Metal Allergy

Certain individuals experience a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling may cause a rash. It is best to use safety gloves.

Crushing risk

Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98