The B30655-M490A-X923 is a common mode choke from TDK Corporation, designed to suppress unwanted noise in electronic circuits. Common mode chokes are essential components in various electronic devices to ensure electromagnetic compatibility (EMC) and prevent interference. They are particularly effective at attenuating common mode noise, which is a type of electrical noise that appears simultaneously on multiple wires or signal lines with respect to a common reference, such as ground.

Applications

• Power lines in electronic devices
• Signal lines in data communication systems
• USB cables and interfaces
• HDMI cables and interfaces
• Audio equipment
• Networking equipment (e.g., routers, switches)
• Industrial control systems

Features

• High common mode impedance to effectively block common mode noise
• Compact size for space-saving designs
• High reliability and performance
• Low insertion loss for minimal signal degradation
• Wide operating temperature range
• RoHS compliant
• Shielded construction (in some variants) for enhanced noise immunity

Benefits

• Improved electromagnetic compatibility (EMC)
• Reduced electromagnetic interference (EMI)
• Enhanced signal integrity
• Prevention of data corruption
• Compliance with regulatory standards
• Increased system stability
• Better audio and video quality in multimedia applications

Additional Details

Common mode chokes like the B30655-M490A-X923 are constructed with two or more identical windings on a common core. These windings are configured such that the magnetic fields generated by differential mode currents (signals) cancel each other out, resulting in low impedance for the desired signal. However, the magnetic fields generated by common mode currents reinforce each other, creating a high impedance that effectively attenuates the noise. This selective attenuation allows the desired signal to pass through with minimal loss while suppressing unwanted noise.

The specific impedance, current rating, and physical dimensions of the B30655-M490A-X923 can vary. Refer to the TDK datasheet for precise specifications. Selection of an appropriate common mode choke requires careful consideration of the frequency range of the noise to be suppressed, the required impedance, the current rating, and the physical size constraints of the application. TDK offers a wide range of common mode chokes to meet diverse requirements.