SRF1280A-331M

Overview

The Bourns SRF1280A-331M is a dual-winding shielded power inductor array featuring a ferrite core and wirewound construction. It provides 330 µH inductance per coil with ±20% tolerance. The device supports parallel connection for 1.04 A rated current and series connection for 522 mA. Key electrical parameters include a maximum DC resistance of 540 mΩ (parallel) or 2.172 Ω (series), saturation currents of 2.01 A (parallel) and 1.01 A (series). It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Dual-winding configuration allows flexible series or parallel circuit integration
• Shielded magnetic structure minimizes electromagnetic interference
• Ferrite core and wirewound design ensure stable performance under load

Applications

• Power supply output filtering
• DC-DC converter input/output stages
• Signal processing circuits requiring differential inductance

Procurement Notes

Verify the specific suffix 'A' against the datasheet to confirm it denotes the dual-winding array variant, as single-winding parts may share similar base codes. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the package dimensions match your PCB footprint exactly.

Selection Notes

Select this component when dual independent inductors are required in a single surface-mount package. Compare parallel versus series DC resistance and current ratings against your specific load profile. Verify that the 330 µH value meets the ripple current and frequency response requirements of the target application circuit.

Part Context

This part belongs to the SRF1280A series of dual-winding shielded power inductors manufactured by Bourns. It shares the physical 12.50mm x 12.50mm footprint with other variants in the family but differs electrically due to its two-coil architecture. It is distinct from the single-winding SRR1280 series.

Replacement Considerations

Direct substitutes include the SRF1280-331M if the dual-winding feature is not strictly required, though pinout differences exist. Check for equivalent dual-winding arrays from other manufacturers with matching 330 µH values and compatible current ratings.