SRF1280-101M

Overview

The Bourns SRF1280-101M is a shielded dual-winding surface-mount power inductor from the SRR1280 series. It features a ferrite core and wirewound construction with four terminals. The nominal inductance is 100 µH with a ±20% tolerance. Key electrical parameters include a maximum DC resistance of 0.175 Ω, a saturation current of 1.96 A, and a self-resonant frequency of 17 MHz. The component operates within a temperature range of -40°C to +125°C and measures 12.5 mm x 12.5 mm x 8 mm.

Feature Summary

• Dual-winding configuration suitable for SEPIC topology applications
• Magnetically shielded design to minimize electromagnetic interference
• Ferrite core construction for stable performance under varying conditions

Applications

• SEPIC converter circuits
• Power supplies for communications equipment
• Computer power systems
• LCD and flat panel displays

Procurement Notes

Verify the specific datasheet version for the SRF1280-101M to confirm exact saturation current ratings and thermal characteristics. Ensure compatibility with PCB footprint dimensions of 12.5 mm by 12.5 mm. Confirm RoHS compliance status through official manufacturer documentation before integration into regulated assemblies.

Selection Notes

Select this component for designs requiring coupled inductors in power conversion stages. The dual-winding structure supports specific topologies like SEPIC. Evaluate the 1.96 A saturation current against peak load requirements. Consider the 0.175 Ω DCR for efficiency calculations in low-voltage high-current applications.

Part Context

This part belongs to the Bourns SRR1280 series of shielded power inductors. The series offers various inductance values and current ratings in a standardized 1280 package size. The SRF variant specifically denotes the dual-winding configuration, distinguishing it from single-winding counterparts in the same physical envelope.

Replacement Considerations

Check for direct substitutes within the SRR1280 series with matching inductance and current ratings. Verify pinout compatibility for the four-terminal dual-winding arrangement. Ensure replacement parts maintain the same magnetic shielding and core material specifications.