Small U-Shaped Neodymium Magnets for Precision Electronics and Sensors

Our standard models deliver a tested pull force ranging from 5.2 kg (FZ‑US2015 N35) up to 95 kg (FZ‑US10080SH N42SH). All values are measured under controlled conditions: a 10 mm thick mild‑steel plate, full flat contact, vertical pulling at room temperature. Please note: real‑world performance may decrease due to surface roughness, air gaps, operating temperature and other factors. We recommend selecting a magnet with a safety factor of 2‑3 times your required load. If you need a test report for a specific specification, please contact our sales engineers.

For the same volume and material grade, a U‑shaped magnet delivers 2‑2.4 times the effective holding force of a bar magnet and 1.5‑1.8 times that of a disc magnet. The U‑shape places both poles on the same side; the workpiece forms a closed magnetic circuit which drastically reduces magnetic flux leakage. If your application requires a single‑point maximum pull force, pot magnets will perform better. The best choice depends entirely on your working conditions.

The grade selection depends on three key factors: required pull force, operating temperature and budget. A higher grade is not always the best option — higher‑grade material costs more, is more brittle and often has a lower maximum operating temperature. The optimal solution meets your performance target with a reasonable safety margin. Share your operating parameters with our engineers, and we will recommend the most cost‑effective grade for your project.

Yes. We offer high‑temperature grades: SH series (max 150 °C) and UH series (max 180 °C). Standard N‑grade magnets are rated for temperatures ≤ 80 °C. An increase in temperature causes a temporary drop in magnetic strength which recools once the magnet returns to ambient temperature. Exposure beyond the Curie point will result in irreversible demagnetisation. Always confirm your actual working temperature during selection.

Fullzen provides six standard surface treatments:

‑ Ni‑Cu‑Ni triple nickel plating (most common, 96‑200 hours salt‑spray resistance)

‑ Zinc plating (economical option)

‑ Black epoxy coating (ideal for outdoor and high‑humidity environments, 200‑500 hours salt‑spray resistance)

‑ Gold plating (medical‑grade and high‑end electronics)

‑ Parylene coating (medical‑grade, biocompatible)

‑ Phosphating (primer coating / temporary rust protection) Custom special coatings are available upon request.

Yes. Our standard size range covers 20‑100 mm, with custom sizes available above 200 mm. We support complex profiles, drilled holes, counter‑sunk holes, stepped features and threaded holes. Magnetisation directions can also be customised for axial, radial or multi‑pole patterns. Simply send your drawing or specification, and we will provide an engineering review and quotation within 24 hours.

MOQ for standard items is generally 50‑100 pieces. Custom‑made parts normally start at 200‑500 pieces. We offer flexible low‑volume sampling programmes for R&D customers. Lead time: 3‑7 days for standard samples, 7‑15 days for custom samples, 15‑20 days for mass production orders. VMI consignment stock is available for long‑term partners.

Yes, samples are available for all standard specifications. Sample costs apply and will be credited against your mass‑production order. Every production batch comes with a material certificate covering magnetic properties, dimensional tolerances and coating performance. Third‑party testing (SGS, CTI and other laboratories) can also be arranged; fees depend on the required test scope.

Our factory holds IATF 16949 (automotive), ISO 9001 (quality management), ISO 13485 (medical device) plus additional management‑system certifications. Our products comply with RoHS and REACH, with corresponding test reports available. Dedicated production control processes apply to automotive‑grade and medical‑grade magnet components.

Wear safety goggles and protective gloves during handling to avoid pinching injuries and flying fragments. Do not bring two magnets face‑to‑face; slide them sideways to join or separate them. Store magnets with a steel keeper to preserve magnetic performance, in a dry, well‑ventilated area away from electronic devices, pacemakers and ferromagnetic objects. Magnetic‑shield export packaging is supplied by Fullzen for shipment.