Hefei Super Electronics Co., Ltd.
What Are You Looking For?
Rectangular NdFeB magnets offer strong magnetic force in a compact, versatile block shape. Ideal for electronics, motors, fixtures, and various industrial or DIY applications.
Size :
40x10x3mmColor :
SilverOrder(MOQ) :
100pcsSample :
AvailableDensity :
7.5g/cm³Lead Time :
3-15daysPayment :
Paypal/TT/Credit CardDropshipping Powerful Rectangular Nickel Coated Neodymium N52 Magnet
Product Description

Length: 40mm(1.58inch)
Width: 10mm (0.39inch)
Thickness: 3mm (0.12inch)
Material: NdFeB
Tolerance: ±0.05mm
Plating/Coating: Ni-Cu-Ni
Magnetization Direction: Axial (Poles on Flat Ends)
Warning:
These magnets are very powerful which should be handled with great care to avoid pinched fingers or chipped magnets.
Do not allow children to play with magnets.
Product Features
Durable Nickel Coating:
The high quality nickel plating offers excellent corrosion and oxidation resistance, effectively protecting the magnet surface from environmental damage. This ensures stable magnetic performance, a smooth surface, and a longer lifespan, even in demanding industrial applications.
Precision Dimensions:
The 40×10×3 mm rectangular neodymium magnets are manufactured with strict dimensional control standards, maintaining a tolerance of within ±0.05 mm. This ensures high dimensional consistency and reliable performance. This high precision allows for seamless integration into precision components, assemblies, and automated production lines.
Axial Magnetization:
The high performance NdFeB magnets are magnetized along their thickness, providing a stable and uniform magnetic force on the working surface. This magnetization method is ideal for surface mounting and direct contact applications where consistent holding force is crucial.
Wide Range of Applications:
Widely used in electronic devices, motors, sensors, fixtures, industrial assemblies, and DIY projects requiring compact size, precise dimensions, and strong magnetic force in limited spaces.
Method For Separating Magnets

Magnetic Strength By Grade
We offer 40×10×3mm neodymium block magnets with customizable grades ranging from N35 to N52, providing varying magnetic strengths to meet diverse application needs:

N35: Medium magnetic force, suitable for general fixing and light duty applications.
N38–N42: Medium strength, suitable for heavier loads or slightly larger air gaps.
N45–N48: High strength, ideal for securing industrial, electronic, or mechanical components.
N50–N52: Top tier strength, providing maximum magnetic force for precision or heavy duty applications.
Note: Higher grades offer stronger magnetic force but may be harder and slightly more expensive. Please select the appropriate grade based on load requirements, operating environment, and magnet size.
| Neodymium | Br | Hcb | Hcj | (Bh)max | Tw | ||||
| Grade | mT | kGs | kA/m | kOe | kA/m | kOe | kJ/m3 | MGOe | ℃ |
| N35 | 1170-1220 | 11.7-12.2 | >868 | >10.9 | >955 | >12 | 263-287 | 33-36 | <80 |
| N38 | 1220-1250 | 12.2-12.5 | >899 | >11.3 | >955 | >12 | 287-310 | 38-39 | <80 |
| N40 | 1250-1280 | 12.5-12.8 | >907 | >11.4 | >955 | >12 | 302-326 | 38-41 | <80 |
| N42 | 1280-1320 | 12.8-13.2 | >915 | >11.5 | >955 | >12 | 318-342 | 40-43 | <80 |
| N45 | 1330-1370 | 13.3-13.7 | >915 | >11.5 | >955 | >12 | 342-367 | 41-44 | <80 |
| N48 | 1380-1420 | 13.8-14.2 | >923 | >11.6 | >955 | >12 | 366-390 | 46-49 | <80 |
| N50 | 1400-1450 | 14.0-14.5 | >796 | >10 | >876 | >11 | 382-406 | 48-49 | <80 |
| N52 | 1430-1480 | 14.3-14.8 | >796 | >10 | >876 | >11 | 398-422 | 50-53 | <80 |
Package&Shipping

Hi! Click one of our members below to chat on