30mm x 10mm Neodymium Round Magnet

Specifications:

• Material: NdFeB (Neodymium Iron Boron Rare-Earth)
• Shape: Round Disc / Coin
• Diameter: 30mm
• Thickness: 10mm
• Plating / Coating: Ni-Cu-Ni (Nickel-Copper-Nickel)
• Magnetization Direction: Axially Magnetized (Poles on the flat faces)
• Maximum Operating Temperature: 80°C

Unlock New Capabilities

• If you've already experimented with basic 3D printed enclosures with friction-fit lids or wired up standard mechanical switches to your microcontrollers, you already understand the limitations of visible hardware — which means you're perfectly ready to upgrade to seamless, hidden mechanisms.
• This 30mm x10mm neodymium magnet unlocks invisible magnetic latches for snap-fit cases, hidden triggers for Hall effect sensors, custom miniature magnetic encoders, and sleek detachable display panels. These are premium, seamless builds you simply cannot achieve reliably with bulky ceramic magnets or mechanical clips.
• Effort Level: Beginner

Minimum hardware to get started:

• Adhesive (Cyanoacrylate superglue or epoxy): to permanently secure the magnet into your project housing or 3D printed recesses.
• Hall Effect Sensor or Reed Switch (if using for electronics): to detect the magnetic field and trigger your microcontroller.

Included in the Box:

• 1×30mm x 10mm Neodymium Round Magnet

Frequently Asked Questions

• Is this magnet compatible with standard Hall Effect sensors?
   Yes, it produces a strong enough magnetic field to trigger most linear and digital Hall effect sensors reliably across small air gaps.
• Can I embed this magnet inside a 3D printed PLA or PETG part?
   Yes, its thin 10mm profile makes it ideal for pausing a 3D print mid-way and embedding it seamlessly between plastic layers.
• Will this magnet work with glass reed switches?
   Yes, it works perfectly to actuate standard magnetic reed switches for custom door alarms or limit detection setups.
• Does the magnetic field interfere with microcontrollers like Arduino or ESP32?
   No, static magnetic fields from small neodymium magnets will not interfere with solid-state microcontrollers unless placed directly over a dedicated magnetic compass IC (like the HMC5883L).
• What is the maximum operating temperature for this neodymium magnet?
   This standard-grade neodymium material is rated for a maximum operating temperature of 80°C before it permanently loses its magnetic properties.
• How strong is the magnetic pull force of this30x10mm disc?
   While exact pull force depends on the contacting material and surface finish, it typically holds approximately 300 to 500 grams of sheer weight against a flat, thick steel plate.
• Will this magnet lose its charge over time?
   No, neodymium rare-earth magnets retain their magnetism indefinitely unless exposed to high heat above 80°C, strong opposing demagnetizing fields, or severe physical shock.
• How do I mount this magnet to a non-magnetic surface?
   You must use a strong adhesive like cyanoacrylate (superglue) or a two-part epoxy, as standard double-sided tape will quickly fail against the strong magnetic pull force.
• Which pole should face the Hall Effect sensor for proper triggering?
   Most digital Hall Effect ICs require the South pole of the magnet to face the branded/printed side of the sensor package to trigger correctly.