SRF1280A-470M

Overview

The SRF1280A-470M is a shielded dual-coil power inductor array from Bourns Inc., designed for surface-mount applications. It features two coils with a nominal inductance of 47 µH per coil and a ±20% tolerance. The component supports series connection (188 µH) and parallel connection (47 µH). Key electrical parameters include a maximum DC resistance of 353 mΩ in series and 89.8 mΩ in parallel. Rated currents are 1.47 A for series and 2.95 A for parallel configurations, with saturation currents of 2.64 A (series) and 5.28 A (parallel). It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Dual-winding shielded design reduces electromagnetic interference
• Configurable for series, parallel, or transformer applications
• High current handling capability with low DC resistance
• RoHS compliant and halogen-free construction

Applications

• DC/DC converter circuits
• Automotive electronic systems
• Power supply modules requiring high power density

Procurement Notes

Verify the exact part number suffix against the manufacturer's datasheet to ensure correct packaging and specifications. Confirm RoHS compliance status and lead times directly with authorized distributors, as standard delivery periods may vary. Ensure the selected variant matches the required inductance tolerance and current ratings for the specific circuit design.

Selection Notes

Select this component when a compact, shielded dual-inductor solution is required for high-current applications. Consider the series and parallel current ratings to determine the appropriate configuration for the load. Verify that the physical dimensions fit the PCB layout constraints and that the operating temperature range meets the environmental requirements of the end application.

Part Context

The SRF1280A series consists of dual-winding shielded power inductors manufactured by Bourns Inc. These components are part of a broader family of signal transformers and inductor arrays designed for demanding power electronics applications. The series offers various inductance values and current ratings to suit different circuit needs while maintaining a consistent footprint and shielding performance.

Replacement Considerations

Check for direct substitutes within the SRF1280A series with matching inductance and current ratings. Verify pin compatibility and physical dimensions before replacing with components from other manufacturers. Ensure any alternative part meets the same shielding and thermal performance standards.

FAQ

What is the difference between the series and parallel inductance values?

In series connection, the total inductance is 188 µH, while in parallel connection, it is 47 µH. This allows flexibility in circuit design depending on the required impedance and current handling.

Is the SRF1280A-470M suitable for automotive applications?

Yes, the SRF1280A series is AEC compliant and designed for use in automotive systems, offering stability under varying temperature conditions from -40°C to +125°C.