SRF1280-821M

Overview

The Bourns SRF1280-821M is a shielded dual-coil power inductor array designed for surface-mount applications. It features an inductance of 820 µH when connected in parallel and 3.28 mH in series, with a tolerance of ±20%. The component has a maximum DC resistance of 1.632 Ω in parallel configuration and supports a rated current of 650 mA (parallel) or 1.04 A (series). Saturation currents are specified at 1.27 A (parallel) and 2.03 A (series). It operates within a temperature range of -40°C to +125°C and measures 12.50mm x 12.50mm x 8.00mm.

Feature Summary

• Magnetically shielded construction minimizes electromagnetic interference and radiation.
• Dual-winding architecture allows flexible series or parallel circuit integration.
• Robust performance across wide industrial temperature ranges.

Applications

• DC/DC converter circuits
• Power factor correction systems
• Automotive electronic modules

Procurement Notes

Verify the specific manufacturer datasheet for the SRF1280-821M to confirm exact electrical tolerances and thermal ratings before finalizing designs. Ensure compatibility with surface-mount assembly processes and check for any recent product change notices regarding material composition or manufacturing locations.

Selection Notes

Select this component when a compact, shielded dual-inductor solution is required for high-frequency power conversion. Compare its saturation characteristics against circuit peak currents. Consider the physical footprint constraints and verify that the parallel or series inductance values align with the target filter or energy storage requirements.

Part Context

This part belongs to the Bourns SRF1280 series of coupled inductors. These components are engineered for high-power density applications where magnetic shielding is critical. The series offers various inductance options within a standardized package size, facilitating design standardization across different power supply architectures.

Replacement Considerations

The DRQ127-821-R from Eaton is listed as a direct substitute. Verify pinout compatibility and ensure the replacement meets the same thermal and current handling specifications for the specific application environment.