Iron Oxide Common-mode Inductor

1. A ferrite common mode choke consists of Haoer’s China Iron oxide common-mode inductor two identical coils symmetrically wound on a high-permeability ferrite core forming a four-terminal device. The coils are typically made of copper wire or enameled wire, minimizing distributed

capacitance (<10pF) and leakage inductance‌.

2. High Permeability & Noise Suppression‌: Initial permeability is 5–20× higher than standard ferrite, achieving >40dB common-mode noise attenuation‌.

3.Broad Frequency Range‌: Effective across 30kHz–100MHz, ideal for suppressing high-frequency switching noise (e.g., in SMPS or inverters)‌.

4..Low Differential-Mode Loss‌: Leakage inductance <1μH ensures minimal impact on signal integrity‌.

5.Temperature Stability‌: Operates reliably from -40°C to +125°C, with stable impedance under thermal stress‌.

Specification

The outer diameter ranges from 14mm to 38mm.

Application scope

Iron Oxide Common-mode Inductor can effectively suppress common-mode interference signals without affecting the differential-mode signals for normal circuit transmission. It is commonly used in electromagnetic cookers, printers, battery chargers, computer power supplies, etc.

Company strength

Founded in 2008, Guangdong Haoer Electronics Co., Ltd. is a dedicated manufacturer of high-precision magnetic components, with a robust footprint in the global electronics industry. Our flagship product portfolio—encompassing high-frequency transformers, filters, and inductors—serves as critical components for cutting-edge applications spanning lighting, home appliances, photovoltaics, UPS systems, automotive electronics, and network communications.

Haoer Electronics has achieved remarkable growth, underpinned by formidable production strengths: multiple manufacturing bases located in Foshan, a workforce of over 1, 000 skilled employees, and an annual production capacity exceeding 100 million units. Our unwavering pursuit of quality is reflected in heavy investments in automated production lines and precision testing equipment, as well as our acquisition of authoritative certifications including CQC, UL, ISO 9000, and TS 16949.

Guided by the core values of innovation, quality leadership, and collaborative success, we continue to deepen our technical expertise and tailor our solutions to meet the evolving demands of the global electronics sector.

Certificate

Introduction to product

The Iron Oxide Common-Mode Inductor is an inductive passive filter component with a high magnetic permeability ferrite core as the carrier, specifically designed to suppress common-mode interference in circuits. It is widely used in electromagnetic compatibility (EMC) improvement in fields such as power supplies, communications, and industrial control. It is a core component for ensuring the stable operation of electronic equipment and passing EMC certification.

High-performance common-mode interference suppression:

The high magnetic permeability characteristic of ferrite cores, combined with the symmetrical winding design, presents an extremely high impedance to common-mode interference signals, effectively attenuating interference in the 10kHz - 100MHz frequency range, helping devices pass EMC certifications such as CE and FCC.

Excellent high-frequency performance:

Ferrite cores have low magnetic loss in the mid-to-high frequency range. Compared to ferrite cores and iron-silicon-aluminum cores, they are more suitable for suppressing high-frequency common-mode interference and are suitable for high-frequency circuit scenarios such as communication and radio frequency.

Low differential-mode impedance, no signal loss:

The differential-mode current has an extremely small impedance for normal operation, without generating additional voltage drop or signal distortion, ensuring circuit transmission efficiency.

Compact size, flexible layout:

The closed magnetic circuit design reduces the component size. UU-shaped and ET-shaped ferrite cores can be adapted to miniaturized equipment, and the surface-mount type meets the requirements of high-density PCB layout.

Economical cost, mature process:

Ferrite materials have a wide source, the winding process is simple, and when mass-produced, it has a significant cost advantage, with a better cost-performance ratio than metal magnetic core common-mode inductors.

High environmental adaptability:

Wide working temperature range (-40℃ to +125℃), compliant with RoHS and REACH environmental standards, resistant to vibration and corrosion

Iron oxide varistors as common-mode inductors have gained popularity due to their high cost-effectiveness and strong suppression capabilities. They have become the fundamental components for electromagnetic compatibility design in electronic devices, balancing practicality and economy. They are essential filtering components ranging from consumer electronics to industrial equipment.

Logistics

We support sending via courier services such as DHL, UPS, TNT, FedEx, etc. And we can also adjust to air or sea transportation methods according to your requirements.

FAQ

1. What are the main types of capacitors your factory produces?

Our company produces metallized films, new energy film capacitors, high-frequency transformers, filter, inductance coil .

2. How can I get a price quote?

You can send an RFQ on our international website indicating the product type, quantity and other requirements. Our team will reply to your offer as soon as possible.

3. Are your products compliant with international standards?

Yes, our products meet the IS09001-2015, UL, CUL, VDE and CQC international standards. The company's products meet the latest EU environmental requirements and meet the RoHs and REACH directive standards.