Product Introduction

This ferrite magnetic ring is manufactured from VN02 grade ferrite material with an initial permeability of 650. It features low loss factor and superior high‑frequency EMI suppression performance. Physical dimensions: outer diameter 14.2±0.5 mm, height 15.0±0.5 mm, inner diameter 7.2±0.4 mm. Benefiting from Curie temperature above 140℃ and high electrical resistivity, it keeps stable magnetic properties under working conditions. Strict dimensional tolerance ensures stable batch‑to‑batch consistency for EMC filtering solutions. Custom specifications are available upon request.

Scope of Application

Widely applied in power adapters, switching power supplies, home appliances, industrial control units, signal cables, data lines, wire harnesses, sensors and communication equipment.

Purpose

It is designed to suppress high‑frequency electromagnetic interference, filter common‑mode noise on cables and harnesses, reduce signal distortion, enhance equipment anti‑interference capacity, and assist finished products to pass EMC compliance tests.

FAQ 

1. Q: How many turns should I wind the cable on the magnetic ring? A: More turns bring better filtering effect within limits. Normally 2‑5 turns for common‑mode noise suppression, subject to actual installation space.
2. Q: What causes cracking of ferrite magnetic rings? A: Hard impact, improper pressing during assembly, thermal shock and mechanical stress are main reasons for cracking.
3. Q: Can magnetic rings eliminate both common‑mode and differential‑mode noise? A: Most toroidal ferrite rings mainly suppress common‑mode noise. Special structure or matched components are required for differential‑mode noise.
4. Q: What is the service life of ferrite magnetic rings? A: Under rated temperature and load, ferrite rings have long service life with no obvious aging, if no physical damage occurs.
5. Q: Can I use multiple magnetic rings together for better noise reduction? A: Yes. Stacking several magnetic rings can improve filtering performance, but you need to consider space and cost.