4448-128L

Overview

The Delevan 4448-128L is an unshielded two-coil inductor array designed for surface mount technology (SMT) applications. It features a nominal inductance of 100 µH when connected in parallel and 400 µH when connected in series. The component has a maximum DC resistance of 303 mΩ in the parallel configuration. It is housed in a standard SMD package suitable for PCB mounting.

Feature Summary

• Dual-coil architecture enabling flexible series or parallel circuit configurations
• Unshielded toroidal construction for high-current power handling
• Surface mount design optimized for automated PCB assembly processes

Applications

• DC-DC converter output filtering
• Power supply input stages
• Signal transformer arrays

Procurement Notes

Verify the specific datasheet version to confirm RoHS compliance status, as historical records indicate variations within the 4448 series. Confirm that the unshielded nature aligns with your electromagnetic interference requirements. Ensure the 303 mΩ DCR specification meets your thermal management constraints under maximum load conditions before finalizing the procurement order.

Selection Notes

Select this component when a dual-inductor solution is required for coupled circuits without magnetic shielding. The 100 µH parallel value suits moderate energy storage needs. Consider the physical dimensions and lead time availability, which may vary by manufacturer batch. Compare against shielded alternatives if EMI suppression is critical for the target application environment.

Part Context

This part belongs to the Delevan 4448 series of surface mount high-current power toroids. The series offers various inductance values and coil configurations. The 4448-128L specifically provides a 100 µH parallel rating, distinguishing it from higher inductance variants like the 4448R-134L or lower inductance models such as the 4448-112M.

Replacement Considerations

Direct substitutes include other Delevan 4448 series parts with matching 100 µH parallel inductance and similar current ratings. Verify pinout compatibility and physical footprint equivalence when considering cross-manufacturer alternatives.