108R-273H

Overview

The Delevan 108R-273H is an unshielded surface-mount RF inductor with a nominal inductance of 27 µH and a tolerance of ±3%. It features a ferrite core and wirewound construction, designed for high-frequency applications. The component has a maximum DC resistance of 8 ohms and a minimum Q factor of 32 at its self-resonant frequency of 14 MHz. It supports a maximum DC current of 55 mA and operates within a temperature range of -55°C to +125°C. The physical dimensions are 2.54 mm in length, 2.54 mm in width, and 1.91 mm in height.

Feature Summary

• Unshielded wirewound design utilizing a ferrite core for stable RF performance
• High Q-factor characteristic suitable for resonant circuit applications
• Compact nonstandard surface-mount package for space-constrained PCB layouts

Applications

• RF filtering circuits
• Impedance matching networks
• Resonant tank circuits

Procurement Notes

Verify component authenticity through authorized channels as the part is discontinued. Confirm RoHS compliance status via official documentation before integration. Ensure storage conditions maintain integrity given the end-of-life status. Cross-reference datasheet revisions to validate electrical parameters against current design requirements.

Selection Notes

Select this component for applications requiring precise 27 µH inductance with tight tolerance in RF environments. Consider the low current rating of 55 mA when designing power stages. Evaluate the unshielded nature for potential EMI implications in dense layouts. Verify footprint compatibility with existing PCB designs due to the nonstandard package dimensions.

Part Context

The 108R series represents Delevan's line of fixed RF inductors characterized by wirewound construction on ferrite cores. This specific model belongs to a family of components optimized for radio frequency signal processing. The series is known for consistent performance in communication equipment and test instrumentation contexts.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.