SRF0905-251Y

Overview

The Bourns SRF0905-251Y is a surface-mount common mode filter choke from the SRF0905 series. It features a ferrite core and offers an inductance of 250 µH with a tolerance of ±50%. The component supports a maximum DC current of 1.2 A and has a maximum DC resistance of 130 mΩ. It provides 600 Ω impedance at 3 MHz and operates within a temperature range of -40°C to +105°C. The device utilizes a 0905 package measuring 9.2 mm x 6 mm x 5 mm.

Feature Summary

• Surface-mount construction for automated PCB assembly
• Ferrite core design for effective noise suppression
• High current handling capability up to 1.2 A

Applications

• Common mode line filtering
• Signal integrity protection in high-speed data lines
• EMI suppression in consumer electronics

Procurement Notes

Verify the specific suffix 'Y' corresponds to the required tape and reel packaging configuration as indicated by distributor listings. Confirm that the 250 µH nominal value aligns with the ±50% tolerance specification for the target circuit design. Ensure the 0905 footprint dimensions match the PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a compact 0905 footprint is required for common mode noise reduction. The 1.2 A rating suits applications with moderate current loads. Consider the 250 µH inductance and 600 Ω impedance profile for frequencies around 3 MHz. Verify thermal performance requirements against the 105°C maximum operating temperature limit.

Part Context

This part belongs to the Bourns SRF0905 series of surface-mount common mode chokes. The series includes variants such as SRF0905-500Y, which shares similar physical dimensions but differs in electrical specifications like inductance and current rating. These components are designed for space-constrained PCB layouts requiring reliable EMI filtering.

Replacement Considerations

SRF0905-500Y is a documented variant within the same series offering different electrical characteristics.