108-273H

Overview

The Delevan 108-273H is a fixed surface-mount RF inductor with an inductance of 27 µH and a tolerance of 3%. It features a maximum DC resistance of 8 Ohms and a minimum Q factor of 32. The component supports a maximum DC current of 55 mA and has a self-resonant frequency of 14 MHz. It utilizes an unshielded ferrite core and measures 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height.

Feature Summary

• Unshielded SMD construction for general-purpose RF applications
• Ferrite core design ensuring stable inductance characteristics
• Standard axial termination style adapted for PCB mounting

Applications

• RF signal processing circuits
• General-purpose filtering applications
• Impedance matching networks

Procurement Notes

Verify component availability as the 108-273H is listed as discontinued by the manufacturer. Confirm end-of-life status and lead times through authorized distributors or secondary market suppliers before finalizing procurement plans. Ensure alternative sourcing strategies are in place due to potential supply constraints.

Selection Notes

Select this component for low-current RF applications requiring 27 µH inductance with tight 3% tolerance. Consider the 8 Ohm DC resistance and 55 mA current limit when designing power stages. Evaluate the unshielded nature against electromagnetic interference requirements in dense PCB layouts.

Part Context

The 108-273H belongs to the Delevan 108R series of surface-mount RF inductors. This series provides non-shielded wirewound components designed for high-frequency circuit integration. The part represents a specific value within the broader family of fixed inductors offered by API Delevan for electronic signal control.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, equivalent replacement requires manual evaluation of electrical parameters such as inductance, tolerance, current rating, and physical footprint compatibility.