SRF1280-220M

Overview

The Bourns SRF1280-220M is a shielded surface-mount coupled inductor array featuring two coils with a nominal inductance of 22 µH and a tolerance of ±20%. It operates within a temperature range of -40°C to +125°C. In parallel configuration, it provides 22 µH inductance with a maximum DC resistance of 50.3 mΩ and a rated current of 1.29 A. In series configuration, it offers 88 µH inductance with a maximum DC resistance of 201 mΩ and a rated current of 645 mA.

Feature Summary

• Shielded dual-coil design for reduced electromagnetic interference
• Liquid-crystal polymer base with epoxy resin adhesive for mechanical stability
• Enamelled copper wire winding construction

Applications

• SEPIC converter topologies
• Flat panel display circuits
• Backlight power supplies

Procurement Notes

Verify the specific suffix 'M' indicates the ±20% tolerance variant. Confirm the package dimensions match the 12.50mm x 12.50mm footprint. Ensure the operating temperature range meets system requirements. Check RoHS compliance status against current regulatory standards. Validate pinout compatibility with the target PCB layout.

Selection Notes

Select this component when a compact, shielded coupled inductor is required for SEPIC or similar topologies. The dual-coil architecture supports both series and parallel configurations for flexible circuit design. Consider the saturation current ratings relative to peak load conditions. Evaluate the low DC resistance for efficiency optimization in power delivery paths.

Part Context

This part belongs to the SRF1280 series of shielded coupled inductors from Bourns Inc. The series utilizes a liquid-crystal polymer substrate and epoxy adhesive for robust surface-mount assembly. These components are designed for high-density power applications requiring magnetic shielding and precise inductance values.

Replacement Considerations

Consult official Bourns documentation for verified cross-references. No public substitute part numbers are confirmed in the provided data.