Three-stage Composite High-Frequency EMI DC Filter

The Three-stage Composite High-Frequency EMI DC Filter is a sophisticated component engineered to provide superior suppression of electromagnetic interference (EMI) in DC power lines. With its three-stage design, this filter effectively attenuates high-frequency noise, ensuring clean and reliable power for sensitive electronic devices. It is suitable for demanding applications in industrial automation, telecommunications, medical equipment, and other environments where EMI can significantly impact performance and reliability.

Specifications of Three-stage Composite High-Frequency EMI DC Filter

• Input voltage: single-phase AC 110--250V
• Output voltage: single-phase AC 110--250V
• Load rated current: 4A--20A
• Input port: three-wire 7.62 socket input
• Output port: 2-wire 7.62 socket output
• Parts used in this module:
  • X2 capacitor: German Siemen 0.22UF 3PCS
  • Y2 capacitor: 275V 3300PF 2PCS
  • Differential mode inductor: 47UH 2PCS
  • Common mode inductor: 2 PCS
  • Resistor: 1 PCS
  • Socket: 7.62 2PIN 3PIN 1PCS each

Key features of Three-stage Composite High-Frequency EMI DC Filter

• One-stage differential mode filtering and two differential mode inductors perform differential mode filtering on the AC power supply to suppress mid- and high-frequency interference.
• The first-level common mode filter is combined into a common mode filter through the X2 capacitor and common mode inductor.
• Three-stage common mode filtering. Since it uses two-stage (also called two-stage) filtering, it has a better effect of filtering out noise. It can suppress the problem of fast transient group pulse interference with a repetition frequency of several kilohertz at some user sites.
• The three-level composite (level 1 differential mode + level 2 common mode) EMI electromagnetic interference filter circuit uses three levels (also known as three sections) of filtering, so it has a better noise filtering effect. It can suppress the problem of fast transient group pulse interference with a repetition frequency of several thousand Hz at some user sites.
• This module is used with a decoder or a power amplifier to filter the DC component of the power supply, eliminate and suppress transformer hum, high-frequency noise in the power supply, and purify the power supply. It can significantly improve the sound quality of the power amplifier, enhance resolution, and make the background quiet.
• The input GND needs to be connected to the ground wire of the power cord, and can also be connected to the chassis shell, depending on the specific situation.