4448R-20L

Overview

The Delevan 4448R-20L is a surface-mount coupled inductor from the 4448/R series, designed for high-current applications. It features a toroidal core construction with two coils and SMD/SMT termination style. The component has an inductance of 25 µH per coil with a 15% tolerance. Maximum DC current rating is specified at 3.5 A, while maximum DC resistance is 0.116 Ω. Physical dimensions are 13.71 mm in length, 13.71 mm in width, and 7.87 mm in height.

Feature Summary

• Toroidal core design for efficient magnetic coupling
• High-current capability suitable for power stages
• Surface-mount package for automated PCB assembly

Applications

• DC-DC converter output filtering
• Multi-phase power supply interleaving
• Coupled inductor filter circuits

Procurement Notes

Verify manufacturer source to ensure authenticity, as API Delevan components require strict quality control. Confirm RoHS status and specific lot codes against project requirements. Check datasheet revisions for any parameter updates before finalizing procurement specifications.

Selection Notes

Select this part when dual-coil magnetic coupling is required in a compact SMD footprint. Ensure the 25 µH value and 3.5 A current rating align with the target circuit's ripple and load requirements. Verify thermal management needs given the molded construction and DC resistance characteristics.

Part Context

This component belongs to the 4448/R series of high-current toroidal coupled inductors manufactured by API Delevan. The series is characterized by its robust molded construction and suitability for demanding power electronics environments requiring tight magnetic coupling between windings.

Replacement Considerations

Cross-reference with other 4448/R series variants such as 4448R-18L or 4448R-124L if different inductance values are acceptable. Verify pinout compatibility and physical dimensions match the existing PCB layout before substitution.