4448R-28L

Overview

The Delevan 4448R-28L is a surface-mount coupled inductor featuring two coils with an inductance of 100 µH and a tolerance of 15%. It exhibits a maximum DC resistance of 0.565 ohms per coil. The component utilizes a toroidal core structure and is designed for high-current applications. Its physical dimensions are standardized within the 4448 series, measuring 13.71 mm in length and width, with a height of 7.87 mm. The device employs SMD/SMT termination types for PCB mounting.

Feature Summary

• Dual-coil toroidal architecture for coupled inductance applications
• High-current capability suitable for power management circuits
• Surface-mount design optimized for automated PCB assembly

Applications

• DC-DC converter input/output filtering
• Power supply common-mode noise suppression
• Signal transformer isolation stages

Procurement Notes

Verify the specific manufacturer designation, as API Delevan assets may be managed by other entities. Confirm RoHS compliance status directly with the supplier, as historical data varies across the product line. Ensure the ordering suffix matches the required tolerance and packaging format. Cross-reference the datasheet revision to confirm electrical parameters align with current production standards before finalizing procurement.

Selection Notes

Select this component when a 100 µH coupled inductance is required in a compact surface-mount footprint. The 0.565 ohm DC resistance indicates suitability for moderate current loads compared to lower-resistance variants in the same series. Evaluate thermal performance based on the specified resistance and expected operating current. Ensure the 15% tolerance meets the circuit's precision requirements for coupled magnetic designs.

Part Context

This part belongs to the 4448/R series of surface-mount high-current power toroids manufactured by API Delevan. The series offers various inductance values ranging from nanohenries to hundreds of microhenries. These components are engineered for dense PCB layouts, providing reliable magnetic coupling in a standardized package size that facilitates consistent manufacturing processes.

Replacement Considerations

Direct substitutes include other 4448R-series parts with identical 100 µH inductance and similar DC resistance. Verify pin compatibility and mechanical dimensions against alternative manufacturers' coupled inductors. Ensure the replacement maintains the toroidal core type if specific magnetic shielding characteristics are critical to the application.