SRF1280-330M

Overview

The Bourns SRF1280-330M is a dual-winding shielded power inductor array from the SRF1280 series. It features a wirewound ferrite core construction with a molded package for mechanical stability. The component measures 12.5 mm x 12.5 mm x 8.0 mm and operates within a temperature range of -40°C to +125°C. Key electrical parameters include a parallel inductance of 33 µH with ±20% tolerance, a saturation current of 6.22 A (parallel) or 3.11 A (series), and a maximum DC resistance of 66.4 mΩ (parallel). The self-resonant frequency is specified at 9.5 MHz.

Feature Summary

• Dual-coil configuration allowing independent series or parallel circuit connections
• Shielded magnetic structure minimizes electromagnetic interference
• Wirewound ferrite core design supports high current handling capabilities

Applications

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

Procurement Notes

Verify the specific datasheet version against the manufacturer's official documentation before integration. Confirm that the dual-winding pinout matches the target PCB layout requirements. Ensure thermal management strategies account for the specified operating temperature limits and DC resistance losses during continuous operation.

Selection Notes

Select this component when a compact dual-inductor solution is required for space-constrained designs. The SRF1280 series offers a balance between high saturation current and low profile dimensions. Consider the parallel versus series connection options to optimize impedance and current ratings for the specific application topology.

Part Context

This part belongs to the SRF1280 series of surface-mount power inductors manufactured by Bourns Inc. The series is characterized by its shielded, wirewound construction using ferrite cores. These components are designed for general-purpose power electronics applications where reliable performance and compact form factors are essential.

Replacement Considerations

Direct substitutes may include other dual-winding shielded inductors from the same series with identical inductance values. Verify physical footprint compatibility and electrical parameter equivalence before substitution.