103R-391G

Overview

The Delevan 103R-391G is a fixed surface-mount inductor with an inductance of 390 nH. It features a maximum DC resistance of 240 mOhms and supports a maximum DC current of 635 mA. The component exhibits a minimum Q factor of 22 at 25 MHz and a self-resonant frequency of 235 MHz. Designed for RF applications, it utilizes an unshielded construction within a nonstandard footprint measuring approximately 2.5 x 2.5 mm.

Feature Summary

• Unshielded construction suitable for specific RF layout requirements
• Fixed inductance value optimized for high-frequency signal processing
• Surface-mount package design facilitating automated assembly

Applications

• RF circuit filtering
• Impedance matching networks
• High-frequency signal conditioning

Procurement Notes

Verify the exact physical dimensions against the official datasheet, as sources indicate variations between 2.5x2.5mm and 2.9x2.7mm. Confirm tolerance specifications, noting discrepancies between 2% and 10% ratings across different documentation. Ensure the selected variant matches the required current rating and DCR limits for the target application.

Selection Notes

Select this component when a compact, unshielded inductor is required for RF stages operating near 235 MHz. Consider the 635 mA current limit and 240 mOhm resistance for power loss calculations. Evaluate the nonstandard footprint compatibility with existing PCB layouts before finalizing the design to ensure proper solder joint formation.

Part Context

This part belongs to the API Delevan line of fixed inductors, specifically engineered for radio frequency applications. The 103R series typically offers small form factors suitable for space-constrained electronic designs. As an unshielded type, it may require careful placement relative to other sensitive components to minimize electromagnetic interference.

Replacement Considerations

Direct substitutes are not explicitly confirmed in public documentation. Verify cross-reference availability through manufacturer channels. Ensure any replacement maintains identical inductance, current rating, and physical footprint constraints.