SRF1280A-220M

Overview

The Bourns SRF1280A-220M is a dual-winding shielded power inductor from the SRF1280A series. It features a ferrite core and surface-mount construction with dimensions of 12.5mm x 12.5mm x 8mm. The component provides an inductance of 22 µH with a ±20% tolerance. Key electrical specifications include a maximum DC resistance (DCR) of 50.3 mΩ per winding, an RMS current rating of 4 A, and a saturation current of 7.57 A. It is rated for operation between -55°C and +155°C and holds AEC-Q200 certification.

Feature Summary

• Dual-winding architecture designed for coupled applications
• Shielded magnetic structure to minimize electromagnetic interference
• High thermal stability suitable for demanding environments
• Automotive-grade reliability certified under AEC-Q200 standards

Applications

• Automotive power supply circuits
• DC-DC converter stages
• Coupled inductor filter designs

Procurement Notes

Verify the specific datasheet version to confirm pinout orientation and thermal pad requirements. Ensure the design accounts for the dual-winding configuration and mutual inductance characteristics if used in coupled modes. Confirm that the package footprint matches the manufacturer's recommended land pattern for reliable soldering.

Selection Notes

Select this component when a compact, high-current dual-inductor solution is required for space-constrained designs. The 1280 case size supports significant current handling compared to smaller footprints. Consider the dual-winding topology for applications requiring phase interleaving or coupled filtering rather than single discrete inductors.

Part Context

This part belongs to the SRF1280A series of dual-winding shielded power inductors manufactured by Bourns Inc. The series is engineered for high-performance power management applications where magnetic coupling and high current density are critical. The 1280 designation refers to the specific physical dimensions of the package.

Replacement Considerations

Direct substitutes must match the 22 µH value, dual-winding structure, and 1280 package dimensions. Verify that alternative components meet the same AEC-Q200 automotive qualification and thermal ratings.