Xuzhou Jiuli Electronics Co., Ltd

Xuzhou Jiuli Electronics Co., Ltd

How can electromagnetic interference be eliminated?

2025 09/17

 

 
 
Electronic devices are generally confronted with electromagnetic compatibility (EMC) challenges: Traditional Differential Mode Inductors have insufficient ability to suppress common-mode noise, resulting in excessive radiation from the devices. Even more seriously, inferior I-type Inductors experience magnetic core saturation in high-temperature environments, causing the filtering efficiency to drop by more than 40%. Have you ever suffered from product delays in going to market due to EMC test failures? Have you been troubled by system malfunctions caused by high-frequency noise? 
 
Our Common Mode Inductors are made of high magnetic permeability nanocrystalline materials and achieve differential common mode separation through orthogonal winding structures. The patented core air gap design enables the Differential Mode Choke Inductor to maintain high impedance while effectively suppressing magnetic saturation. The sandwich winding technique reduces parasitic parameters to 30% of those of traditional products, significantly enhancing high-frequency characteristics. 
 
Verified by the National Electronic Information Product Quality Testing Center:
  •  The common-mode rejection ratio reaches 60 dB at 1 MHz
  • The temperature stability is maintained within the full range from -40°C to 125°C
  •  Compared with ordinary I-type Inductors: The insertion loss is increased by 18 dB 

Core advantages of the product 

Dual-mode filtering technology:
Synchronously suppresses common-mode and differential-mode noise
Adaptive saturation characteristic:
Automatically adjusts the flux density to prevent saturation
Low leakage magnetic design: Reduces electromagnetic interference to surrounding components

Application suggestions:

① Keep away from heat sources during layout to prevent the attenuation of magnetic core performance
② Control the welding temperature within the range of 260℃ ± 5℃ ③ Avoid parallel installation with Differential Mode Inductors to prevent coupling 
After being adopted on a large scale by a certain industrial controller manufacturing enterprise, the actual measurement results were as follows: 
The one-time pass rate of EMC tests has increased to 98%
The system restart rate caused by noise has dropped to 0.5%
The product repair rate has decreased by 3.2 percentage points
This high-performance common-mode inductor is like the "electromagnetic guardian" of electronic systems. Its outstanding noise suppression ability and stability provide a pure working environment for high-precision electronic equipment. From industrial automation to medical equipment, our solutions help your products easily meet the most stringent EMC challenges. 
Technical breakthrough: The Common Mode Inductors with a special winding structure have a self-resonance frequency point that is twice as high as that of traditional products. The Differential Mode Choke Inductor made of innovative materials maintains its linear characteristics even at 100A current. All I type Inductors have undergone full temperature range aging tests to ensure stable performance in extreme environments.
Common-mode inductanceCommon-mode inductanceCommon-mode inductanceCommon-mode inductance