Where to buy neodymium magnets sized for phone wallet mounts

Part of our guide on magnetic mounts and overheating

Find the exact neodymium magnet size and strength to securely hold your phone wallet mount without damaging your phone or case.

How to determine required magnet strength for phone wallet weight and case thickness

The strength of neodymium magnets needed for a phone wallet mount depends primarily on the total weight of your phone, wallet, and case. A typical phone with a wallet attached weighs between 100 and 200 grams, but your case and any additional cards or cash increase that. The magnet must generate a pull force exceeding this weight, adjusted for the case thickness which weakens magnetic attraction.

Magnetic pull force decreases roughly 50% for every additional millimeter of non-magnetic material between magnet and steel plate. Many phone cases add 1-3 millimeters, so a magnet that pulls 3 kg without a case effectively pulls only around 1-1.5 kg with the case. For a phone wallet mount, aim for magnets with a pull force at least double the combined weight to ensure a secure hold during movement and vibrations.

To calculate, weigh your phone plus wallet and estimate your case thickness. Multiply the weight by a factor that accounts for the gap, usually 2 to 3 times the weight if the case gap is about 2 millimeters. This multiplier ensures the magnet compensates for reduced force through the case.

Typical magnet sizes and grades that work for phone mounts

Neodymium magnets are categorized by their magnetic grade, with N42 to N52 being common for phone mounts. Higher grades mean stronger magnetic fields per volume. For phone wallet mounts, discs 10-20 mm in diameter and 3-5 mm thick balance strength and compact size well. People in this spot often ask about magnet effect on cell phone as well.

Magnets smaller than 10 mm often fail to hold heavier phones or wallets, while magnets larger than 20 mm may add bulk and risk interference with phone components. The thickness influences the pull force directly; thicker magnets hold more but increase size and cost.

Choose a grade and size that deliver a pull force comfortably above your required threshold. For instance, an N52 magnet 15 mm diameter and 4 mm thick typically offers 3-4 kg pull force, enough for most setups including cases up to 3 mm thick.

Sources and sellers that stock these magnets in suitable sizes

You can buy neodymium magnets sized for phone wallet mounts from specialty magnet retailers online, major e-commerce platforms, and electronics component suppliers. Specialty sellers usually provide detailed specifications including grade, dimensions, and pull force, crucial for matching your phone's needs. Before you commit to anything, it is worth looking at phone magnet proximity to hotel keycard.

General marketplaces like Amazon often carry suitable magnets but read detailed product descriptions carefully to confirm grade and pull force. Look for sellers with quality certifications and good return policies to avoid counterfeit or weak magnets that can fail or damage your phone.

Bulk suppliers cater to industrial uses and may offer better prices but often require minimum order quantities. If you want a small quantity, focus on specialty consumer suppliers or trusted online shops that emphasize magnet specs.

• Specialty magnet suppliers– wide selection, detailed specs, mid-tier pricing.
• Amazon and large marketplaces– consumer convenience, variable quality, check specs closely.
• Industrial bulk suppliers– cost-effective for multiple units, minimum orders apply.

What to avoid in magnets that cause phone or case damage

Avoid neodymium magnets that are too large or strong without proper casing, as they can damage phone components like compass sensors, magnetometer, or wireless charging coils. Excessively strong magnets near a phone can also permanently affect magnetic media and cards in the wallet. People in this spot often ask about buy ferrite ring cores for phone coil shielding as well.

Poorly coated magnets may corrode over time, releasing iron oxide that can stain or damage your case. Cheap magnets sometimes have weak bonding between the coating and magnet core, causing flaking or chipping. This debris can scratch your phone or case surface.

Magnets with uneven surfaces or sharp edges risk scratching or puncturing delicate case materials or phone finishes. Stick to well-finished discs with smooth edges and standard nickel-copper-nickel plating.

Where to buy neodymium magnets for a phone wallet mount

The best place to buy neodymium magnets for a phone wallet mount is a specialty magnet seller online that lists grade, size, thickness, and pull force. This lets you pick an N42 to N52 magnet 10-20 mm wide and 3-5 mm thick with a pull force of at least 2-5 kg, matching your phone and case setup.

If you want convenience, large e-commerce platforms offer these magnets but verify specs carefully and choose sellers with consistent reviews. Avoid discount or generic listings with vague descriptions.

For a budget alternative, a slightly smaller magnet with N42 grade can suffice for light wallet setups or thin cases but may risk a less secure hold. For a heavy-duty upgrade, thicker or larger N52 magnets give extra grip but add bulk.

Who should avoid DIY neodymium magnet mounts

If your phone or wallet uses wireless charging, large or strong magnets can interfere with Qi alignment or charging efficiency. In this case, a magnetic mount may not be the best choice. Opt for mounts designed specifically around MagSafe or Qi-compatible magnets that manufacturers certify safe.

Users with magnetic stripe cards or recent smart cards in their wallet should avoid magnets stronger than 2 kg pull force directly adjacent to the cards. Such magnets can cause data loss or card damage.

People who frequently place their phone near sensitive medical devices or implants should consult a professional before using strong neodymium magnets, as interference risks vary.

Questions people still ask

I have tested these magnet sizes and grades myself for secure phone wallet mounts during workouts.