7427927121

Overview

The Würth Elektronik 7427927121 is a single-line signal ferrite bead in the WE-CBF series, housed in a compact 0402 (1005 metric) surface-mount package. It provides an impedance of 220 Ohms at 100 MHz and supports a maximum rated current of 200 mA. The component features a maximum DC resistance of 800 milliohms and operates within a temperature range of -55°C to 125°C. Its physical dimensions are 1.00 mm in length, 0.50 mm in width, with a maximum height of 0.55 mm.

Feature Summary

• Provides high impedance for effective electromagnetic interference suppression in signal lines
• Designed for space-constrained applications using a small 0402 surface-mount footprint
• Capable of handling rated currents up to 200 mA with low DC resistance

Applications

• High-speed data interfaces such as USB 2.0 and IEEE 1394
• LVDS signal line protection
• Control signals and RS232 communication lines

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, such as tape and reel or cut tape, matches production requirements. Confirm that the AEC-Q200 qualification status aligns with automotive reliability standards if applicable. Check RoHS compliance documentation for environmental regulatory adherence. Ensure the selected variant corresponds exactly to the 220 Ohm impedance specification at 100 MHz.

Selection Notes

Select this component when circuit board real estate is limited due to its 0402 package size. Choose this part for signal lines requiring significant attenuation at 100 MHz while maintaining low insertion loss through minimal DC resistance. Consider the 200 mA current rating to ensure the component does not saturate or overheat during normal operation. Verify thermal performance within the specified -55°C to 125°C operating range.

Part Context

This ferrite bead belongs to the WE-CBF series from Würth Elektronik, which focuses on small-size SMD components for EMI suppression. The series includes various impedance values and current ratings tailored for different signal integrity needs. The 7427927121 specifically targets high-frequency noise reduction in compact electronic designs.

Replacement Considerations

Cross-reference other WE-CBF series parts with matching 0402 footprints and similar impedance characteristics. Verify that any substitute maintains the same 220 Ohm @ 100 MHz specification and 200 mA current rating. Ensure compatibility with existing PCB land patterns and reflow soldering profiles.