SRF0905A-400Y

Overview

The Bourns SRF0905A-400Y is a surface-mount common mode choke designed for automotive applications, certified to AEC-Q200 standards. It features a ferrite core with an inductance of 40 µH and a tolerance of ±30%. The component supports a maximum DC current of 900 mA and exhibits a maximum DC resistance of 250 mOhms. It provides an impedance of 800 Ohms at 20 MHz. Operating within a temperature range of -40°C to +105°C, it utilizes a 0905 package measuring 9.2 mm in length, 6 mm in width, and 5 mm in height.

Feature Summary

• Automotive-grade reliability compliant with AEC-Q200 qualification standards
• Dual-channel design for effective common mode noise suppression
• Ferrite core construction optimized for high-frequency signal line filtering

Applications

• Automotive infotainment system data lines
• Vehicle communication bus protection
• High-speed digital interface noise filtering

Procurement Notes

Verify the specific suffix 'Y' corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm that the AEC-Q200 certification status meets the specific quality requirements of the target automotive application. Ensure the 0905 footprint dimensions align with the PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when automotive-grade durability is required alongside precise 40 µH inductance values. The 900 mA current rating suits moderate power signal lines, while the 250 mOhm DCR minimizes insertion loss. Consider the 800 Ohm impedance at 20 MHz for high-frequency noise attenuation needs in compact 0905 form factor designs.

Part Context

This part belongs to the Bourns SRF0905A series of surface-mount common mode chokes. The series is engineered specifically for automotive electronics, ensuring robust performance under harsh environmental conditions. The SRF0905A-400Y variant offers a balanced solution for filtering electromagnetic interference on data lines without significantly impacting signal integrity.

Replacement Considerations

Direct substitutes include other AEC-Q200 qualified common mode chokes with identical 40 µH inductance and 0905 footprint. Verify compatibility regarding maximum DC current ratings and impedance characteristics at operating frequencies to ensure equivalent noise suppression performance.