SRF0703HA-681M

Overview

The Bourns SRF0703HA-681M is a surface-mount coupled inductor from the SRF0703HA series, featuring a ferrite core and shielded construction. It offers an inductance of 680 µH with a ±20% tolerance. The component supports parallel (680 µH) and series (4.12 mH) configurations. It handles a maximum DC current of 0.29 A and exhibits a maximum DC resistance of 3.96 Ω. Operating within a temperature range of -55°C to +150°C, it measures 7.6 mm x 7.6 mm x 3.4 mm.

Feature Summary

• Magnetically shielded design minimizes electromagnetic interference and radiation.
• Dual-winding architecture allows flexible circuit integration via parallel or series connections.
• High-temperature ferrite core ensures stable performance under thermal stress.

Applications

• DC-DC converter input/output filtering
• Power supply noise suppression circuits
• Signal coupling in high-frequency power electronics

Procurement Notes

Verify the specific suffix 'HA' to confirm the high-temperature variant (-55°C to +150°C). Ensure the required inductance configuration matches the datasheet values for parallel or series operation. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component when high thermal stability and magnetic shielding are critical. The 680 µH value suits applications requiring moderate energy storage with low current handling. Compare against standard SRF0703 series parts if lower temperature ratings are acceptable. Verify footprint compatibility with existing PCB layouts due to the 0703 package dimensions.

Part Context

This part belongs to the Bourns SRF0703HA series of coupled inductors. It shares physical dimensions with the standard SRF0703 series but utilizes materials rated for higher operating temperatures. The series provides multiple winding configurations for versatile power management designs.

Replacement Considerations

Direct substitutes include other Bourns SRF0703HA variants with similar inductance values. Cross-reference electrical parameters such as DCR and saturation current when considering non-Bourns alternatives.

FAQ

What is the difference between the SRF0703 and SRF0703HA series?

The SRF0703HA series is designed for higher operating temperatures, ranging from -55°C to +150°C, compared to the standard SRF0703 series which typically operates up to +125°C.

How does the shielding affect the inductor's performance?

The magnetics shielded construction reduces electromagnetic radiation and minimizes interference with nearby components, making it suitable for dense PCB layouts.