SRF1280A-221M

Overview

The Bourns SRF1280A-221M is a dual-winding shielded power inductor array featuring two coils with 220 µH nominal inductance and ±20% tolerance. It operates within a temperature range of -40°C to +125°C. The component measures 12.50 mm x 12.50 mm x 8.00 mm. In parallel configuration, it offers 220 µH inductance, 343 mΩ maximum DC resistance, 1.29 A rated current, and 2.43 A saturation current. In series configuration, it provides 886 µH inductance, 1.38 Ω maximum DC resistance, 645 mA rated current, and 1.22 A saturation current.

Feature Summary

• Dual-winding architecture allows flexible circuit integration including parallel, series, and transformer applications.
• Shielded construction minimizes electromagnetic interference and magnetic flux leakage.
• Ferrite core design supports high-current operation in compact surface-mount form factors.

Applications

• Automotive electronics systems requiring AEC-Q200 qualified components
• DC-DC converter circuits utilizing parallel winding configurations for high current
• Power supply designs employing series winding configurations for high inductance

Procurement Notes

Verify the specific suffix 'M' indicates ±20% tolerance when sourcing replacements. Confirm package dimensions match the 12.50 mm x 12.50 mm footprint. Ensure thermal management aligns with the +125°C maximum operating temperature rating. Cross-reference datasheet electrical parameters against target circuit requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring dual independent windings in a single shielded package. Choose parallel configuration for higher current handling up to 1.29 A. Choose series configuration for increased inductance up to 886 µH. Verify PCB layout accommodates the 12.50 mm square footprint and 8.00 mm height constraints.

Part Context

This part belongs to the SRF1280A series of dual-winding shielded power inductors manufactured by Bourns. The series is designed for automotive and industrial applications requiring robust magnetic shielding and high current capability in a small surface-mount package.

Replacement Considerations

Direct substitutes include other SRF1280A series variants with matching inductance values. Verify equivalent thermal ratings and physical dimensions when considering alternative manufacturers.

FAQ

What are the electrical differences between parallel and series configurations?

In parallel, the inductance is 220 µH with 343 mΩ DCR and 1.29 A rated current. In series, the inductance increases to 886 µH with 1.38 Ω DCR and 645 mA rated current.

Is this component suitable for automotive applications?

Yes, the SRF1280A series is designed for automotive electronics and meets relevant reliability standards for such environments.