V18031 Toroidal Ferrite Core Magnetic Ring High Frequency EMI Noise Suppression Core For Electronic Equipment Filter Application

1. Product Brief 

Crafted from VN09‑grade nickel‑zinc soft ferrite, the V18031 toroidal magnetic core delivers an initial permeability of 850 alongside a low loss coefficient. This ferrite component offers outstanding high‑frequency noise attenuation and effective EMI interference mitigation. Tight dimensional tolerances guarantee uniform performance across production lots for large‑scale assembling. Boasting great electrical resistivity and broad operating temperature scope, it maintains steady magnetic output in diverse working scenarios. As an RoHS‑certified EMC filtering part, it works to get rid of common‑mode and high‑frequency electromagnetic disturbance and assists finished units in clearing EMC qualification examinations. Samples, small trial lots and high‑volume shipments are available to satisfy demands ranging from R&D prototypes to full‑scale manufacturing. 

2. Product Description 

V18031 toroidal ferrite magnetic ring adopts high‑quality VN09 nickel‑zinc soft ferrite raw material. Its initial permeability reaches 850, with low relative loss factor at 0.1MHz. The physical dimensions are A15.0mm, B14.0mm, C5.0mm, D23.0mm, dimension tolerance ±1.0 mm. High resistivity above 10⁵ Ω·m brings excellent insulation property. Curie temperature is over 130℃, so magnetic characteristics remain stable even when ambient temperature fluctuates.

This ferrite toroid core can effectively suppress high‑frequency electromagnetic disturbance, restrain common‑mode noise on power lines and signal lines, reduce signal distortion and electromagnetic crosstalk. Uniform size facilitates winding processing and cable harness assembly. All products meet RoHS environmental requirements, suitable for global export end‑products. Strict incoming material inspection and finished‑product testing guarantee stable quality for every batch.

3. Application Scope & Usages 

Application Scope： Widely used in consumer electronics, smart home devices, power adapters and chargers, industrial control equipment, automation devices, communication equipment, inverter and converter modules, office electronic hardware, wiring harness assemblies and other electronic products requiring EMC electromagnetic interference filtering.

Usages：

1. Suppress high‑frequency common‑mode interference for power cables, power cords and signal wires
2. Reduce electromagnetic crosstalk and signal distortion of internal wiring harness inside electronic devices
3. Help finished electronic products pass EMC, EMI related compliance tests
4. Filter electromagnetic noise for power supply, adapter and charger assemblies
5. Improve anti‑interference performance for industrial control panels and automation equipment circuits

4. FAQ

Q1: What is the main function of ferrite magnetic ring?

A: Ferrite magnetic ring works as an EMI EMC filter component. It mainly absorbs and suppresses high‑frequency common‑mode electromagnetic noise, reduces signal crosstalk and interference on power cables and signal lines, helping electronic devices achieve better anti‑interference performance and pass EMC certification.

Q2: How to select proper ferrite magnetic ring for my project?

A: Key factors for selection include core model, material grade, initial permeability, inner and outer dimension, operating frequency range and current condition. You can provide your working frequency, cable size and interference phenomenon, we will give professional suggestion for core selection.

Q3: Do you support ferrite magnetic ring sample testing?

A: Yes, we support sample supply for performance testing and verification before mass order. Customers can test the noise suppression effect on your actual equipment. After sample confirmation, you can proceed with small‑batch trial order and bulk production order.

Q4: What is the influence of Curie temperature for ferrite core?

A: Curie temperature is the critical temperature for ferrite to lose magnetism. Higher Curie temperature means the magnetic ring can keep stable filtering performance under higher working temperature. Our VN09 material core has Curie temperature above 130 centigrade, fit for most normal electronic equipment working environment.

Q5: Are your ferrite magnetic rings RoHS compliant for export?

A: Our ferrite magnetic rings comply with RoHS environmental requirements. Raw materials and finished products are controlled for harmful substances. It is available for consumer electronics and industrial products exporting to global markets. Relevant documents can be provided upon customer request.