SRF1260A-331M

Overview

The Bourns SRF1260A-331M is a shielded dual-winding coupled inductor from the SRF1260A series. It features an inductance of 330 µH in parallel connection and 1.32 mH in series configuration, with a tolerance of ±20%. The component has a maximum DC resistance of 574 mΩ in parallel and 2.29 Ω in series. Rated currents are 1.06 A (parallel) and 530 mA (series), with saturation currents reaching 1.22 A (parallel) and 610 mA (series). It operates within a temperature range of -40°C to +125°C and utilizes a ferrite core.

Feature Summary

• Magnetically shielded wirewound construction minimizes electromagnetic interference radiation.
• Dual-winding design supports flexible circuit integration via series or parallel configurations.
• Robust thermal performance allows stable operation across extended industrial temperature ranges.

Applications

• DC-DC converter output filtering
• Power supply input stages
• Coupled inductor circuits for interleaved topologies

Procurement Notes

Verify the specific suffix 'A' against the target schematic, as it denotes the automotive-grade variant which may differ in reliability standards compared to standard SRF1260 parts. Confirm package dimensions match the PCB footprint exactly. Ensure the supplier provides original manufacturer documentation to validate RoHS compliance and material declarations before finalizing orders.

Selection Notes

Select this component when low magnetic leakage is critical due to its shielded structure. Compare parallel versus series current ratings based on the specific load requirements. Verify that the physical size fits the available board space. Consider the higher cost of the automotive-grade 'A' series if standard industrial reliability suffices for the application.

Part Context

This part belongs to the SRF1260A family of surface-mount coupled inductors. It shares the 12.5mm x 12.5mm x 6.2mm footprint with other variants in the series but offers distinct electrical characteristics tailored for high-current applications. The 'A' designation indicates adherence to stricter automotive quality standards.

Replacement Considerations

Direct substitutes include SRF1260-331M for non-automotive applications. Other SRF1260 series variants with similar inductance values may be considered if current ratings and shielding requirements align with the design specifications.

FAQ

What is the difference between the SRF1260 and SRF1260A series?

The SRF1260A series is designated for automotive applications and typically adheres to AEC-Q200 standards, whereas the standard SRF1260 series is intended for general industrial use.

Can this inductor be used in both series and parallel modes?

Yes, the dual-winding design allows for flexible configuration. The datasheet specifies distinct inductance and current ratings for both series and parallel connections.