Our VN09 nickel-zinc ferrite toroidal core has physical sizes A30.0mm and B13.0mm. Made from high-resistivity soft magnetic ferrite material, it features initial permeability of 850 and Curie temperature higher than 110℃. Its minimum impedance reaches 105Ω at 25MHz and 190Ω at 100MHz. Strict dimension tolerance and rigid visual inspection standards guarantee stable quality. With low high-frequency loss and reliable material performance, this ferrite toroid effectively dampens high-frequency EMI noise and helps electronic hardware pass EMC certification tests.

This toroidal ferrite core suppresses high-frequency electromagnetic interference carried on wiring harnesses. As unwanted high-frequency noise passes through the core, electromagnetic energy is converted into thermal energy and dissipated. It reduces radiated electromagnetic disturbance, preserves signal quality, and solves common issues including EMC test failure, signal corruption and screen flicker.

• Home appliances: kitchen appliances, multi-purpose cookers, recessed ceramic hobs, power adapters and chargers
• Industrial equipment: industrial touchscreens, HMI control panels, sensors, control signal cables and power wires
• Communication cables: USB, HDMI and other signal transmission cables
• Medical equipment, precision measurement instruments and other electronic devices requiring EMC enhancement

1.Q: Does the cable wire gauge affect the filtering effect of ferrite cores?
A: Yes. The inner aperture of the toroidal core must properly fit the outer diameter of the cable. Too large clearance between cable and core will weaken noise suppression performance.

2.Q: Can ferrite cores eliminate all electromagnetic interference completely?
A: No. Ferrite cores mainly attenuate high-frequency conducted and radiated noise. They cannot remove every interference source. Sometimes combined EMC solutions such as capacitors or inductors are required.

3.Q: Can ferrite cores be used on AC mains power cables?

A: Yes. Nickel-zinc ferrite toroids are widely applied on AC power lines to absorb high-frequency RF noise, while low-frequency working current can flow through normally.

4.Q: Will bending or squeezing damage the ferrite toroid?
A: Ferrite material is brittle. Heavy impact, squeezing or sharp bending force may cause cracks. Cracked cores will lose magnetic performance and cannot work normally.

5.Q: What is the shelf life for unused ferrite cores?
A: Ferrite cores have no expiry date when stored in dry and room-temperature environments. Avoid high humidity or corrosive atmosphere to prevent surface oxidation.