FB20021-4B

Common Mode Chokes Overview

The Bourns FB20021-4B is a two-line common mode choke designed for through-hole mounting. It features an axial leaded package with four leads, providing structural integrity for circuit board integration. The component exhibits a nominal impedance of 460 ohms at 100 MHz and supports a DC current rating of 5 amperes. It belongs to the FB2000 series and is constructed with ferrite materials to suppress electromagnetic interference.

Common Mode Chokes Feature Summary

• Provides effective suppression of common mode noise in high-current applications
• Features a robust axial leaded construction for secure through-hole mounting
• Maintains specified impedance characteristics at operating frequencies

Common Mode Chokes Applications

• Power supply input filtering
• Data line protection in industrial equipment
• EMI suppression in consumer electronics

Common Mode Chokes Procurement Notes

Verify the specific impedance value against the official datasheet, as distributor listings may vary between 175 ohms and 460 ohms for similar part numbers. Confirm the DC current rating and package type match system requirements before ordering. Ensure RoHS compliance status aligns with project specifications.

Common Mode Chokes Selection Notes

Select this component when a two-line common mode choke with a 5A current rating is required. The axial leaded format suits applications needing mechanical stability. Compare impedance values at 100 MHz against other series members to ensure compatibility with target noise frequencies.

Common Mode Chokes Part Context

This component is part of the Bourns FB2000 series of wide-band chokes. These components are engineered for general-purpose EMI suppression. The series offers various impedance options within a standardized axial leaded form factor, allowing designers to select appropriate attenuation levels for different circuit environments.

Common Mode Chokes Replacement Considerations

The FB20021-4B-RC is a related variant within the same product range. Verify if the RC suffix indicates any functional differences or packaging changes compared to the standard FB20021-4B model before substitution.