SRF0905A-471Y

Overview

The Bourns SRF0905A-471Y is a surface-mount common mode line filter from the SRF0905A series. It features an inductance of 470 µH and a maximum DC current rating of 1.1 A. The component exhibits a DC resistance of 140 mΩ and an impedance of 1 kΩ at 2 MHz. It operates within a temperature range of -40°C to +105°C and meets AEC-Q200 automotive qualification standards. The physical dimensions are 9.2 mm x 6 mm x 5 mm.

Feature Summary

• Automotive-grade reliability compliant with AEC-Q200 standards
• Compact surface-mount design for space-constrained PCB layouts
• Ferrite core construction for effective noise suppression

Applications

• Automotive electronic circuit protection
• Common mode noise filtering in data lines
• Signal integrity enhancement in compact modules

Procurement Notes

Verify the specific suffix 'Y' against official Bourns documentation to confirm packaging configuration, as suffixes may denote reel or cut tape options. Ensure the AEC-Q200 certification status aligns with project requirements by checking the latest datasheet revision. Confirm that the 1.1 A current rating and 140 mΩ DCR meet the target circuit's thermal and electrical constraints before finalizing procurement.

Selection Notes

Select this component when automotive qualification is mandatory for common mode chokes in limited space. The 470 µH value targets specific frequency attenuation needs, while the 1.1 A rating supports moderate current loads. Compare the 140 mΩ DCR against power loss limits. The 0905 footprint requires compatible land pattern design. Verify impedance characteristics at 2 MHz match the interference spectrum.

Part Context

This part belongs to the Bourns SRF0905A series of miniature surface-mount common mode filters. The series is designed for high-density applications requiring robust noise suppression. The 'A' designation typically indicates specific automotive-grade enhancements or material variations within the broader SRF0905 family. These components utilize ferrite cores to manage electromagnetic interference in sensitive electronics.

Replacement Considerations

Direct substitutes must match the 470 µH inductance, 1.1 A current rating, and 0905 package size. Verify equivalent AEC-Q200 compliance if automotive use is required. Check impedance curves at 2 MHz for compatibility. Alternative parts from other manufacturers require validation of DCR and thermal performance.